Achromatic lenses.
Specification:
Material:BK7,grade A,fine annealed optical glass
Design Index:1.51680
Diameter Tolerance:+0/-0.1mm
Paraxial Focal Length:1%
Centration:3 arc minutes
Clear Aperture:90%of the diameter
Surface Quality:60-40 scratch and dig
Bevel:<0.25mm¡Á45¡ã
All specification we will make according to your request.