Positive Meniscus Lens
These lenses may be used to increase the numerical aperture of a positive lens assembly, without an undue increase in the aberrations.
Capability
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Material: |
Optical glass, Fused silica, CaF2, Si, Ge, etc. |
|
Diameter: |
1-500mm |
|
Diameter tolerance: |
+0/-0.05mm |
|
Clear aperture: |
> 90% of diameter |
|
Center thickness: |
|
|
Thickness tolerance: |
+/-0.05mm |
|
Radius: |
2 - 50000mm |
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Radius tolerance: |
+/-0.1% |
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Centration: |
30 arc seconds |
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Surface quality: |
20-10 scratch and dig |
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Power: |
|
|
Irregularity: |
|
|
Coating: |
with or without AR coating |
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Bevel: |
Protective bevel |
l Capability is subject to the change of material used and dimension.
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