Optical bi Concave Lens

Concave lens that possesses at least one surface that curves inwards.

It is a diverging lens, spreading out those light rays that have been

refracted through it. A concave lens is thinner at its centre than at

its edges, and is used to correct short-sightedness.

Material:Fused cilica, BK7 Grade A or equivalent optical glasses

Design Wavalength:546.1nm

Diameter Tolerance:±0.1mm, ±0.15mm for Dia.≥75mm

Paraxial Focus Length:±2%

Centration:<3 arc minutes

Clear Aperture:>85%

Surface Figure:λ/4 at 632.8nm

Surface Quality:20/10 or better

Coatings:Antireflection coatings or NIR coatings or no

Bevel:protective bevel

We could offer concave or convex lenses according to custom design.

Besides, there are a large volume of stock optical components in various

shapes and sizes to facilitate quick deliveries.