Symmetric-Concave Lenses
Specifications
| Material: |
BK7, K9, Grade A, fine annealed, or as specified |
| Design wavelength: |
546.1nm or as specified |
| Design index: |
1.5187 ± 0.001 (BK7) or as specified |
| Diameter Tolerance: |
+0, -0.15mm |
| Paraxical focal length: |
± 2% |
| Centration: |
± 3 arc minutes |
| Clear aperture: |
90% of the diameter |
| Scratch and dig: |
60-40, 40-20, up to 10-5 upon request |
| Circumference: |
Fine ground, slight protective bevel for both edges |
| AR Coating |
MgF2, visible wavelength, or as specified |
| Customized Specs |
Available upon request as per drawing |
Spectral Chart
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