In {TAIL ~ the first embodiment}, {HEAD ~ the size} of the laser unit is more compact, compared to the prior art apparatus, even when a portion without the collimator lens 7 is compared 
In
In { TAIL ~ the first embodiment } , { HEAD ~ the size } of the laser unit is more compact , compared to the prior art apparatus , even when a portion without the collimator lens 7 is compared
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH