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长春佳福光电子有限公司 > Spherical lens > Bi-Concave Spherical Lens
spherical lens
Bi-Concave Spherical Lens

Bi-Concave lens

 
A Bi-concave lens is compose of two concave surface, has a negative focal length and are best used to diverge a converging beam. It is widely used in Projection Systems,Imaging Systems,Laser Measurement Systems.

 Parameter

 

Diameter

2-150mm

Diameter Tolerance

+0/-0.1mm

Thickness Tolerance

+/-0.15mm

Focal Length Tolerance

+/-2%mm

Centration

<3

Bevel

0.2mm-0/+0.2X45°

Surface Quality

60/40

Surface Flatness 

lambda/4@633nm

Clear Aperture

>90%

Material

Optical crystal such as glass, quartz, calcium fluoride, germanium, silicon

Coating

Specified by Customers

编号(NO.)

材料(Material

焦距(EFL)

直径(Dia)

中心厚(Tc)

边厚(Te)

R1    

R2

镀膜(coating

数量(Quantity)

N-LAK22

5.00

1.50

36.00

4.60


13

R1