Double-Concave (DCV) Lenses

Double Concave Lenses, Bi-Concave Lenses is like the Plano-Concave lenses in that they are used to produce divergent light. The Bi-Concave is best used when the input beam is converging.


●Product Origin: China
●Shipping Port: Fuzhou China
●Lead Time: 4 working weeks
●Payment: T/T Payment, Western Union

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Product introduction

Product description


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1. What is Biconcave lens?

Double Concave lenses(biconcave lens) are manufactured with two concave surfaces to provide a negative focal length. 

The lens is also called a negative or diverging lens.

2.What is biconcave lens used for?

These lenses are normally used in applications that require to expand light beams or to increase focal lengths. Such as 

Beam Expanders, Projection lenses, viewers, Medical Ophthalmic Detection... and so on.


Specification

Material：Optical glass, BK7, Fused Silica, CaF2,Germanium etc. 

Bevel：<0.25mm X 45°

Demand 

Standard

High Precision

Diameter Tolerance

+0/-0.1mm

+0/-0.05mm

Focal Tolerance

±0.1

±0.02

Surface Quality

60-40

20-10

Clear Aperture

>85%

>95%

 Surface Flatness 

N=5， △N=0.5

N=3  △N=0.3 

Centration

3 min

30 arcset

Coating:

Single layer MgF2;

Multiple layers BBAR coating.

Designed for 0° Angle of Incidence