.

Positive achromat lens

Positive achromat lens is a closely spaced and often cemented, combination of positive and negative elements of differing refractive index. These elements are chosen so that the chromate aberration is cancelled at two distant and well-separated wavelengths.

Capability

Material:

crown glass and flint glass

Diameter:

2-200mm

Diameter tolerance:

+0/-0.05mm

Clear aperture:

90% of diameter

Center thickness:

Thickness tolerance:

+/-0.05mm

Radius:

>2mm

Radius tolerance:

+/-0.1%

Centration:

3 minutes

Surface quality:

40-20 scratch and dig

Power:

Irregularity:

Coating:

with AR coating on outside surfaces

Bevel:

Protective bevel

l Capability is subject to the change of material used and dimension.



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