Standard Specifications
| Material
|
BK7, FS, UVFS, CaF2, ZnSe, Si, Ge
|
| Diameter Tolerance
|
+0.0, -0.15 mm
|
| Thickness Tolerance
|
+/-1.0 mm
|
| Focal Length Tolerance |
+/- 3% |
| Centration
|
<3 arc minutes
|
| Clear Aperture
|
>90%
|
| Chamfer
|
0.25 mm @ 45o
|
| Surface Figure
|
L/4@632.8 nm
|
| Surface Quality
|
40-20 scratch & dig
|
| Design wavelength
|
632.8 nm
|
| AR coatings |
None. Please refer to the Coatings section. |
|
Properties (Diameter D, Focal length L)
| D, mm |
D, Inches |
L Minimal, mm |
L Maximal, mm |
| 10 x 10
|
0,5 x 0,5
|
20
|
1.000
|
| 20 x 40 |
0,75 x 1,5 |
30 |
2.000 |
|
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