Double concave lens

Double Concave Lenses

Double Convex Lenses are made of BK7 or other materials, which are manufactured with an identical convex surface on both sides of the lens. The Double Convex lenses have positive focal lengths and form both real and virtual images. Photonchina also provides precision grade Double Convex lenses with tighter manufacturing tolerances.

 

Photonchina Specifications

Material: BK7 or other glass materials
Design Wavelength: 546.1nm, n=1.518721
Diameter Tolerance: +0.0/-0.1mm
Paraxial Focal Length: ±2%
Centration: 3 arc minutes
Surface Figure : l/4 @ 632.8 nm
Surface Quality: 60/40
Clear Aperture: >80%
Bevel: <0.25mm X 45°
Coating: Upon customer’s request