Double concave

Double Concave Lenses

Double-Concave Lenses have two inward curved surfaces and a negative focal length. They are used for image reduction and to spread light.

This negative lens has the form most suitable to producing divergent light or a virtual image, where the input light is converging

Materials like BK7, Fused Silica, Sapphire, CaF2 are all available in Photonchina.


Photonchina Specifications

Material: BK7 or other materials
Diameter Tolerance: +0.0/-0.1mm
Paraxial Focal Length: ±1%-2%
Centration: 3 arc minutes
Surface Figure : l/4 @ 632.8 nm
Surface Quality: 40/20
Clear Aperture: >80%
Bevel: <0.25mm X 45°
Coating: Upon customer’s request