the present invention will now be described more fully hereinafter with reference to the accompanying drawings , in which exemplary embodiments of the invention are shown . this invention may , however , be embodied in many different forms and should not be construed as limited to the embodiments set forth herein . rather , these embodiments are provided so that this disclosure will be thorough and complete , and will fully convey the scope of the invention to those skilled in the art . referring to the drawings , like numbers indicate like components throughout the views . as used in the description herein and throughout the claims that follow , the meaning of “ a ,” “ an ,” and “ the ” includes plural reference unless the context clearly dictates otherwise . also , as used in the description herein and throughout the claims that follow , the meaning of “ in ” includes “ in ” and “ on ” unless the context clearly dictates otherwise . moreover , titles or subtitles may be used in the specification for the convenience of a reader , which has no influence on the scope of the invention . further illustration on the present invention will be given in the following in conjunction with drawings . as shown in fig1 and fig2 , a multiple led condensing system using for lamp is capable of imaging , the multiple led condensing system includes a flat light source , the flat light source includes a flat substrate , and multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is an aspherical lens , the conical coefficient is − 0 . 85 , the curvature radius is 4 . 5 mm , the diameter is 10 mm , the edge thickness is 1 mm , the four first condensing lenses 11 are on the same plane to form a first condensing lens group 1 , conducting the first condensing on light emitted by the leds . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 20 mm , right curvature radius is 8 mm , diameter is 10 mm , and edge thickness is 1 mm , and the four second condensing lenses 21 are on the same plane to form a second condensing lens group 2 , conducting the second condensing on the light emitted by the leds . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 40 mm , the diameter is 20 mm , and the edge thickness is 1 mm , and the four third condensing lenses 31 are on the same plane to form a third condensing lens group 3 , conducting the third condensing on the light emitted by the leds . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 80 mm , the diameter is 65 mm , and the edge thickness is 1 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 0 mm , the distance between the second condensing lens and the third condensing lens is 8 mm , and the distance between the third condensing lens and the fourth condensing lens is 2 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 and fig2 , a multiple led condensing system using for lamp is capable of imaging , the multiple led condensing system includes a flat light source , the flat light source includes a flat substrate , and multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is an aspherical lens , the conical coefficient is − 0 . 7 , the curvature radius is 7 . 0 mm , the diameter is 15 mm , the edge thickness is 3 mm , the four first condensing lenses 11 are on the same plane to form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 40 mm , right curvature radius is 14 mm , diameter is 15 mm , and edge thickness is 3 mm , and the four second condensing lenses 21 are on the same plane to form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 60 mm , the diameter is 25 mm , and the edge thickness is 3 mm , and the four third condensing lenses 31 are on the same plane to form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 100 mm , the diameter is 70 mm , and the edge thickness is 3 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 1 . 5 mm , the distance between the second condensing lens and the third condensing lens is 12 mm , and the distance between the third condensing lens and the fourth condensing lens is 25 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 and fig2 , a multiple led condensing system using for lamp is capable of imaging , the multiple led condensing system includes a flat light source , the flat light source includes a flat substrate , and multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is an aspherical lens , the conical coefficient is − 0 . 6 , the curvature radius is 10 mm , the diameter is 20 mm , the edge thickness is 5 mm , the four first condensing lenses 11 are on the same plane to form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 60 mm , right curvature radius is 20 mm , diameter is 20 mm , and edge thickness is 5 mm , and the four second condensing lenses 21 are on the same plane to form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 80 mm , the diameter is 30 mm , and the edge thickness is 5 mm , and the four third condensing lenses 31 are on the same plane to form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 120 mm , the diameter is 75 mm , and the edge thickness is 5 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 3 mm , the distance between the second condensing lens and the third condensing lens is 15 mm , and the distance between the third condensing lens and the fourth condensing lens is 50 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . it can be seen from the above embodiments 1 ˜ 3 that , the flat led light source is easy to process , the processing and installation accuracy requirements are not high ; focusing can be done through the fourth condensing lens 4 , and it is quicker and easier to focus ; the heat dissipation of the flat led light source is easy to conduct , with low cost ; the optical efficiency is improved by 80 %; light combining can be achieved within short distance , and the combined light is even . three times of condensing are conducted uniformly and descendingly , the beam angle of 120 degree emitted by the leds is collected to 70 - 80 degree through the first condensing lens group 1 on the first time , collected to 30 - 40 degree through the second condensing lens group 2 on the second time , collected to within 20 degree through the third condensing lens group 3 on the third time , and collected near the focus point of the fourth condensing lens 4 at last , more than 60 % of light are concentrated within the diameter range of 20 mm - 60 mm , and more than 60 % divergence angles of light are within 40 degree , suitable for depositing imaged object . as shown in fig1 and fig2 , a multiple led condensing method using for lamp is capable of imaging , the light condensing are conducted by the flat light source , the flat light source includes a flat substrate , and multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 85 , the curvature radius is 4 . 5 mm , the diameter is 10 mm , the edge thickness is 1 mm , the four first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 20 mm , right curvature radius is 8 mm , diameter is 10 mm , and edge thickness is 1 mm , and the four second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 40 mm , the diameter is 20 mm , and the edge thickness is 1 mm , and the four third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 80 mm , the diameter is 65 mm , and the edge thickness is 1 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 0 mm , the distance between the second condensing lens and the third condensing lens is 8 mm , and the distance between the third condensing lens and the fourth condensing lens is 2 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 and fig2 , a multiple led condensing method using for lamp is capable of imaging , the light condensing are conducted by the flat light source , the flat light source includes a flat substrate , and multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is an aspherical lens , the conical coefficient is − 0 . 7 , the curvature radius is 7 . 0 mm , the diameter is 15 mm , the edge thickness is 3 mm , the four first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 40 mm , right curvature radius is 14 mm , diameter is 15 mm , and edge thickness is 3 mm , and the four second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 60 mm , the diameter is 25 mm , and the edge thickness is 3 mm , and the four third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 100 mm , the diameter is 70 mm , and the edge thickness is 3 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 1 . 5 mm , the distance between the second condensing lens and the third condensing lens is 12 mm , and the distance between the third condensing lens and the fourth condensing lens is 25 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 and fig2 , a multiple led condensing method using for lamp is capable of imaging , the light condensing are conducted by the flat light source , the flat light source includes a flat substrate , and multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 6 , the curvature radius is 10 mm , the diameter is 20 mm , the edge thickness is 5 mm , the four first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 60 mm , right curvature radius is 20 mm , diameter is 20 mm , and edge thickness is 5 mm , and the four second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 80 mm , the diameter is 30 mm , and the edge thickness is 5 mm , and the four third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 120 mm , the diameter is 75 mm , and the edge thickness is 5 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 3 mm , the distance between the second condensing lens and the third condensing lens is 15 mm , and the distance between the third condensing lens and the fourth condensing lens is 50 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . it can be seen from the above embodiments 4 ˜ 6 that , three times of condensing are conducted uniformly and descendingly , the beam angle of 120 degree emitted by the leds is collected to 70 - 80 degree through the first condensing lens group 1 on the first time , collected to 30 - 40 degree through the second condensing lens group 2 on the second time , collected to within 20 degree through the third condensing lens group 3 on the third time , and collected near the focus point of the fourth condensing lens 4 at last , more than 60 % of light are concentrated within the diameter range of 20 mm - 60 mm , and more than 60 % divergence angles of light are within 40 degree , suitable for depositing imaged object . the flat led light source is easier to process , the processing and installation accuracy requirements are not high , focusing can be conducted through the fourth condensing lens 4 , focusing is quicker and easier ; the heat dissipation of the flat led light source is easy to conduct , with low cost ; the optical efficiency is improved by 80 %; light combining can be achieved within short distance and the combined light is even . as four 60 w leds for example , they can be used for zooming imaging system after focusing and combining , exited beam angle is zoomed from 12 degree to 40 degree , the average illuminance of 1 meter spot can reach 4500 lx , but as for the same kind of lamp of the traditional hid light source , the average illuminance of 1 meter spot of 575 w is about 6500 lx . a multiple led condensing and imaging system , including a light source , and imaging lens group disposed at front of the light source . as shown in fig1 and fig2 , the light source is a flat light source , the flat light source includes a flat substrate , multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 85 , the curvature radius is 4 . 5 mm , the diameter is 10 mm , the edge thickness is 1 mm , the three first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 20 mm , right curvature radius is 8 mm , diameter is 10 mm , and edge thickness is 1 mm , and the three second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 40 mm , the diameter is 20 mm , and the edge thickness is 1 mm , and the three third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 80 mm , the diameter is 65 mm , and the edge thickness is 1 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 0 mm , the distance between the second condensing lens and the third condensing lens is 8 mm , and the distance between the third condensing lens and the fourth condensing lens is 2 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 , there arranged a first plano - convex lens 7 , a second plano - convex lens 8 , and a third plano - convex lens 9 on the direction of optical path sucessively . the curvature radius of right convex of the first plano - convex lens 7 is 70 mm , with edge thickness of 1 mm , and diameter of 63 mm ; the curvature radius of right convex of the second plano - convex lens 8 is 120 mm , with edge thickness of 1 mm , and diameter of 65 mm ; the curvature radius of right convex of the third plano - convex lens 9 is 140 mm , with edge thickness of 1 mm , and diameter of 75 mm . the distance between the first plano - convex lens 7 and the second plano - convex lens 8 is 0 mm ; the first plano - convex lens 7 and the second plano - convex lens 8 form a focusing lens group , and the focusing lens group is 25 mm behind the imaged object 4 in the system ; the third plano - convex lens 9 is 150 mm behind the imaged object 4 in the system . the first plano - convex lens 7 and the second plano - convex lens 8 form a focusing lens group , using for focusing of system in the imaging system , and making the image outside 2 meters behind the shot clear ; the structure of the shot of the whole imaging system is simple , costs less , and has clear image , and the range of the imaged object 4 is big , which can reach 60 mm and deposit many imaged object . a multiple led condensing and imaging system , including light source , and imaging lens group disposed at front of the light source . as shown in fig1 and fig2 , the light source is flat light source , the flat light source includes a flat substrate , multiple leds 5 are distributed uniformly on the flat substrate . there are three leds 5 in the present embodiment . the three leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 7 , the curvature radius is 7 . 0 mm , the diameter is 15 mm , the edge thickness is 3 mm , the three first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 40 mm , right curvature radius is 14 mm , diameter is 15 mm , and edge thickness is 3 mm , and the three second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 60 mm , the diameter is 25 mm , and the edge thickness is 3 mm , and the three third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 100 mm , the diameter is 70 mm , and the edge thickness is 3 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 1 . 5 mm , the distance between the second condensing lens and the third condensing lens is 12 mm , and the distance between the third condensing lens and the fourth condensing lens is 25 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 , there arranged a first plano - convex lens 7 , a second plano - convex lens 8 , and a third plano - convex lens 9 on the direction of optical path sucessively . the curvature radius of right convex of the first plano - convex lens 7 is 80 mm , with edge thickness of 3 mm , and diameter of 68 mm ; the curvature radius of right convex of the second plano - convex lens 8 is 130 mm , with edge thickness of 3 mm , and diameter of 70 mm ; the curvature radius of right convex of the third plano - convex lens 9 is 150 mm , with edge thickness of 3 mm , and diameter of 80 mm . the distance between the first plano - convex lens 7 and the second plano - convex lens 8 is 1 . 5 mm ; the first plano - convex lens 7 and the second plano - convex lens 8 form a focusing lens group , and the focusing lens group is 45 mm behind the imaged object 4 in the system ; the third plano - convex lens 9 is 160 mm behind the imaged object 4 in the system . the first plano - convex lens 7 and the second plano - convex lens 8 form a focusing lens group , using for focusing of system in the imaging system , and making the image outside 2 meters behind the shot clear ; the structure of the shot of the whole imaging system is simple , costs less , and has clear image , and the range of the imaged object 4 is big , which can reach 60 mm and deposit many imaged object . a multiple led condensing and imaging system , including light source , and imaging lens group disposed at front of the light source . as shown in fig1 and fig2 , the light source is flat light source , the flat light source includes a flat substrate , multiple leds 5 are distributed uniformly on the flat substrate . there are three leds 5 in the present embodiment . the three leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 6 , the curvature radius is 10 mm , the diameter is 20 mm , the edge thickness is 5 mm , the three first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 60 mm , right curvature radius is 20 mm , diameter is 20 mm , and edge thickness is 5 mm , and the three second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 80 mm , the diameter is 30 mm , and the edge thickness is 5 mm , and the three third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 120 mm , the diameter is 75 mm , and the edge thickness is 5 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 3 mm , the distance between the second condensing lens and the third condensing lens is 15 mm , and the distance between the third condensing lens and the fourth condensing lens is 50 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 , there arranged a first plano - convex lens 7 , a second plano - convex lens 8 , and a third plano - convex lens 9 on the direction of optical path successively . the curvature radius of right convex of the first plano - convex lens 7 is 85 mm , with edge thickness of 5 mm , and diameter of 74 mm ; the curvature radius of right convex of the second plano - convex lens 8 is 140 mm , with edge thickness of 5 mm , and diameter of 75 mm ; the curvature radius of right convex of the third plano - convex lens 9 is 160 mm , with edge thickness of 5 mm , and diameter of 85 mm . the distance between the first plano - convex lens 7 and the second plano - convex lens 8 is 3 mm ; the first plano - convex lens 7 and the second plano - convex lens 8 form a focusing lens group , and the focusing lens group is 60 mm behind the imaged object 4 in the system ; the third plano - convex lens 9 is 170 mm behind the imaged object 4 in the system . the first plano - convex lens 7 and the second plano - convex lens 8 form a focusing lens group , using for focusing of system in the imaging system , and making the image outside 2 meters behind the shot clear ; the structure of the shot of the whole imaging system is simple , costs less , and has clear image , and the range of the imaged object 4 is big , which can reach 60 mm and deposit many imaged object . it can be seen from the above embodiments 7 ˜ 9 that , three times of condensing are conducted uniformly and descendingly , the beam angle of 120 degree emitted by the leds is collected to 70 - 80 degree through the first condensing lens group 1 on the first time , collected to 30 - 40 degree through the second condensing lens group 2 on the second time , collected to within 20 degree through the third condensing lens group 3 on the third time , and collected near the focus point of the fourth condensing lens 4 at last , more than 60 % of light are concentrated within the diameter range of 20 mm - 60 mm , and more than 60 % divergence angles of light are within 40 degree , suitable for depositing imaged object . the efficiency of the imaging system formed by the light source and the imaging lens group is high , can focus , the image is clear , and using high - power led as light source costs low . a multiple led condensing and imaging system , including light source , and imaging lens group disposed at front of the light source . as shown in fig1 and fig2 , the light source is flat light source , the flat light source includes a flat substrate , multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 85 , the curvature radius is 4 . 5 mm , the diameter is 10 mm , the edge thickness is 1 mm , the four first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 20 mm , right curvature radius is 8 mm , diameter is 10 mm , and edge thickness is 1 mm , and the four second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 40 mm , the diameter is 20 mm , and the edge thickness is 1 mm , and the three third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 80 mm , the diameter is 65 mm , and the edge thickness is 1 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 0 mm , the distance between the second condensing lens and the third condensing lens is 8 mm , and the distance between the third condensing lens and the fourth condensing lens is 2 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 , there arranged a first plano - convex lens 12 , a glued lens 13 , double convex lens 14 , double concave lens 15 , and a second plano - convex lens 16 according to the optical path successively . the curvature radius of the right convex of the first plano - convex lens 12 is 60 mm , with diameter of 65 mm , and edge thickness of 1 mm . as to the glued lens 13 , the curvature radius of the left convex is 400 mm , the curvature radius of the middle convex is 57 mm , the curvature radius of the right convex is 200 mm , and the diameter is 65 mm . as to the double convex lens 14 , the curvature radius of the left convex is 85 mm , the curvature radius of the right convex is 550 mm , the diameter is 65 mm , and the edge thickness is 1 mm . as to the double concave lens 15 , the curvature radius of the left concave is 110 , the curvature radius of the right convex is 300 mm , the diameter is 65 mm , and the thickness of the center is 2 mm . the curvature radius of the right convex of the second plano - convex lens 16 is 100 mm , the diameter is 115 mm , and the edge thickness is 1 mm . the distance between the first plano - convex lens 12 and the glued lens 13 is 0 mm , the distance between the glued 13 and the double convex lens 14 is 0 mm ; the first plano - convex lens 12 , the glued lens 13 , and the double convex lens 14 form a focusing lens group , the focusing lens group is 30 mm behind the imaged object 6 , the double concave lens 15 is 120 mm behind the imaged object 6 , and the second plano - convex lens 16 is 210 mm behind the imaged object 6 . the glued lens 13 is used for reduce the aberration of system , the focusing lens group is used for focusing of system in the imaging system , and the double concave lens 15 is used for removing the aberration of system and achieving zooming . the range of the imaged object 6 of system is big , which can reach 70 mm and deposit many imaged object 6 ; the system has large range of zooming function , makes the image of the imaged object 6 clear at any distance outside 1 meter behind the shot , and costs less . a multiple led condensing and imaging system , including light source , and imaging lens group disposed at front of the light source . as shown in fig1 and fig2 , the light source is flat light source , the flat light source includes a flat substrate , multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 7 , the curvature radius is 7 . 0 mm , the diameter is 15 mm , the edge thickness is 3 mm , the four first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 40 mm , right curvature radius is 14 mm , diameter is 15 mm , and edge thickness is 3 mm , and the four second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 60 mm , the diameter is 25 mm , and the edge thickness is 3 mm , and the three third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 100 mm , the diameter is 70 mm , and the edge thickness is 3 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 1 . 5 mm , the distance between the second condensing lens and the third condensing lens is 12 mm , and the distance between the third condensing lens and the fourth condensing lens is 25 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 , there arranged a first plano - convex lens 12 , a glued lens 13 , double convex lens 14 , double concave lens 15 and a second plano - convex lens 16 according to the optical path successively . the curvature radius of the right convex of the first plano - convex lens 12 is 65 mm , with diameter of 70 mm , and edge thickness of 3 mm . as to the glued lens 13 , the curvature radius of the left convex is 410 mm , the curvature radius of the middle convex is 58 . 5 mm , the curvature radius of the right convex is 220 mm , and the diameter is 70 mm . as to the double convex lens 14 , the curvature radius of the left convex is 90 mm , the curvature radius of the right convex is 565 mm , the diameter is 70 mm , and the edge thickness is 3 mm . as to the double concave lens 15 , the curvature radius of the left concave is 120 , the curvature radius of the right convex is 315 mm , the diameter is 70 mm , and the thickness of the center is 3 . 5 mm . the curvature radius of the right convex of the second plano - convex lens 16 is 115 mm , the diameter is 120 mm , and the edge thickness is 3 mm . the distance between the first plano - convex lens 12 and the glued lens 13 is 1 . 5 mm , the distance between the glued 13 and the double convex lens 14 is 1 . 5 mm ; the first plano - convex lens 12 , the glued lens 13 , and the double convex lens 14 form a focusing lens group , the focusing lens group is 65 mm behind the imaged object 6 , the double concave lens 15 is 155 mm behind the imaged object 6 , and the second plano - convex lens 16 is 220 mm behind the imaged object 6 . the glued lens 13 is used for reduce the aberration of system , the focusing lens group is used for focusing of system in the imaging system , and the double concave lens 15 is used for removing the aberration of system and achieving zooming . the range of the imaged object 6 of system is big , which can reach 70 mm and deposit many imaged object 6 ; the system has large range of zooming function , makes the image of the imaged object 6 clear at any distance outside 1 meter behind the shot , and costs less . a multiple led condensing and imaging system , including light source , and imaging lens group disposed at front of the light source . as shown in fig1 and fig2 , the light source is flat light source , the flat light source includes a flat substrate , multiple leds 5 are distributed uniformly on the flat substrate . there are four leds 5 in the present embodiment . the four leds 5 are on the same plane to form the flat light source . a first condensing lens 11 is disposed at front of each led 5 , the first condensing lens 11 is aspherical lens , the conical coefficient is − 0 . 6 , the curvature radius is 10 mm , the diameter is 20 mm , the edge thickness is 5 mm , the four first condensing lenses 11 are on the same plane and form a first condensing lens group 1 , conducting the first condensing on light emitted by led . a second condensing lens 21 is disposed at front of each first condensing lens 11 , the second condensing lens 21 is an ordinary spherical lens , its left curvature radius is 60 mm , right curvature radius is 20 mm , diameter is 20 mm , and edge thickness is 5 mm , and the four second condensing lenses 21 are on the same plane and form a second condensing lens group 2 , conducting the second condensing on the light emitted by led . a third condensing lens 31 is disposed at front of each second condensing lens 21 correspondingly , the third condensing lens 31 is a simple plano - convex lens , its curvature radius of convex is 80 mm , the diameter is 30 mm , and the edge thickness is 5 mm , and the three third condensing lenses 31 are on the same plane and form a third condensing lens group 3 , conducting the third condensing on the light emitted by led . a fourth condensing lens 4 is disposed at front of the third condensing lens group 3 , the fourth condensing lens 4 is a non - snell lens , the focal distance of the fourth condensing lens is 120 mm , the diameter is 75 mm , and the edge thickness is 5 mm . the first condensing lens 11 , the second condensing lens 21 and the third condensing lens 31 form the condensing system , the distance between the first condensing lens and the second colleting lens is 3 mm , the distance between the second condensing lens and the third condensing lens is 15 mm , and the distance between the third condensing lens and the fourth condensing lens is 50 mm , it can be conducted that condensing the 80 % light flux of divergent light of single light bead into nearly parallel light with small divergence by shot combination with small diameter , and then condensing multiple nearly parallel light to the position near the focus point of the fourth condensing lens 4 by the fourth condensing lens 4 , and achieving the combination of the beams of multiple light beads . as shown in fig1 , there arranged a first plano - convex lens 12 , a glued lens 13 , double convex lens 14 , double concave lens 15 , and a second plano - convex lens 16 according to the optical path successively . the curvature radius of the right convex of the first plano - convex lens 12 is 70 mm , with diameter of 75 mm , and edge thickness of 5 mm . as to the glued lens 13 , the curvature radius of the left convex is 420 mm , the curvature radius of the middle convex is 60 mm , the curvature radius of the right convex is 240 mm , and the diameter is 75 mm . as to the double convex lens 14 , the curvature radius of the left convex is 95 mm , the curvature radius of the right convex is 580 mm , the diameter is 75 mm , and the edge thickness is 5 mm . as to the double concave lens 15 , the curvature radius of the left concave is 130 , the curvature radius of the right convex is 330 mm , the diameter is 75 mm , and the thickness of the center is 5 mm . the curvature radius of the right convex of the second plano - convex lens 16 is 130 mm , the diameter is 125 mm , and the edge thickness is 5 mm . the distance between the first plano - convex lens 12 and the glued lens 13 is 3 mm , the distance between the glued 13 and the double convex lens 14 is 3 mm ; the first plano - convex lens 12 , the glued lens 13 , and the double convex lens 14 form a focusing lens group , the focusing lens group is 100 mm behind the imaged object 6 , the double concave lens 15 is 190 mm behind the imaged object 6 , and the second plano - convex lens 16 is 230 mm behind the imaged object 6 . the glued lens 13 is used for reduce the aberration of system , the focusing lens group is used for focusing of system in the imaging system , and the double concave lens 15 is used for removing the aberration of system and achieving zooming . the range of the imaged object 6 of system is big , which can reach 70 mm and deposit many imaged object 6 ; the system has large range of zooming function , makes the image of the imaged object 6 clear at any distance outside 1 meter behind the shot , and costs less . it can be seen from the above embodiments 1012 that , three times of condensing are conducted uniformly and descendingly , the beam angle of 120 degree emitted by the leds is collected to 70 - 80 degree through the first condensing lens group 1 on the first time , collected to 30 - 40 degree through the second condensing lens group 2 on the second time , collected to within 20 degree through the third condensing lens group 3 on the third time , and collected near the focus point of the fourth condensing lens 4 at last , more than 60 % of light are concentrated within the diameter range of 20 mm - 60 mm , and more than 60 % divergence angles of light are within 40 degree , suitable for depositing imaged object . the imaging system formed by the light source and the imaging lens group has large range of zooming function , can make the image of imaged object clear at any distance outside 1 meter behind the shot , costs less , has high efficiency , has clear image , can zoom and focus , and using high - power led as light source costs low . the foregoing description of the exemplary embodiments of the invention has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise forms disclosed . many modifications and variations are possible in light of the above teaching . the embodiments were chosen and described in order to explain the principles of the invention and their practical application so as to activate others skilled in the art to utilize the invention and various embodiments and with various modifications as are suited to the particular use contemplated . alternative embodiments will become apparent to those skilled in the art to which the present invention pertains without departing from its spirit and scope . for example , multiple probes may be utilized at the same time to practice the present invention . accordingly , the scope of the present invention is defined by the appended claims rather than the foregoing description and the exemplary embodiments described therein .