K9 Double Concave (DCV) Lenses

Double-Concave Lenses can diverge the light, its focal length is nedtive, which is made of  two concave surfaces with same radius.These lenses are ideal for the application of beam expansion, light projection or the expansion of the focal length. We offer uncoated or AR coatings Double-Concave Lenses for your appliation.

Material:H-K9L optical glass

Design Wavelength:587.6nm

Diameter Tolerance:+0.0/-0.1mm

Center Thickness Tolerance:±0.2mm

Irregularity (P-V):λ/4 @632.8nm

Focal Length Tolerance（EFL）:±2%

Surface Quality:40-20

Bevel:0.2mmX45°

Coating: Optional