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