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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