{HEAD ~ The numerical aperture} of {TAIL ~ the first aspheric collimating lens} is at least 0.3 
of
{ HEAD ~ The numerical aperture } of { TAIL ~ the first aspheric collimating lens } is at least 0.3
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH