平凹透镜

平凹透镜

The Plano Concave Lenses are made from BK7 material,which are manufactured with one concave surface and one plane surface. Theselenses have negative focal lengths. These lenses diverge collimated incidentlight. They form virtual images which are seen through the lens. They are oftenused to expand light or to increase focal lengths in existing systems. We alsooffer precision grade plano convcave lens with tighter manufacturing tolerances.
Specifications:

Material:

BK7

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:

Uncoated

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