, the window has a diffractive optical element on a surface of the window closest to the array, {HEAD ~ the diffractive optical element} arranged to partially collimate {TAIL ~ the light} 
arranged to partially collimate
, the window has a diffractive optical element on a surface of the window closest to the array , { HEAD ~ the diffractive optical element } arranged to partially collimate { TAIL ~ the light }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL