Aspheric collimators offer several advantages over standard glass or plastic spheric collimators. 

The laser output power rises by up to 35% by using a single element aspheric lens and the output beam is much tigher as you can get by using spheric lenses.

Details:

Thread	M9 x 0,5
FL (mm)	4,02
NA	0,6
Clear aperture (mm)	4,89
Collimator length (mm)	10.5
AR Coating (nm)	300-700 / 700-1100
Reflection (%)	<0,5
Housing material	Brass
Compliance	RoHS