Specifications

1.high accuracy
2.reasonable price
3.high quality
4.This is widely used for focusing and the formation of image

Specifications

 

Biconcave Lenses have negative focal lengths. They are often used to expand light or increase focal lengths in existing systems.

 

1)Flat base as Aspheric design with normal base price.
2)Super hard and hydrophobic protection.
3)More suitable for European

 

 

 

 

 

Specification:

 

 

 

Material	BK7, H-K9L ,UV fused silica,Corning7980
focal length	+/-2%
Diameter	5-120mm +0.0/-0.2
Center thickness	1.2-60mm +/-0.1
Centering Accuracy	3'
Figure (sphericity)	1~5
Surface Quality	10-5,40-20,60/40
Coating	optional