Items |
Standard Precision |
High Precision |
Material |
BK7 Grade A or equivalent Optical Glass |
Diameter Range |
§¶2mm - §¶100mm |
Diameter Tolerance |
+0.0/-0.2 mm |
+0.0/-0.02 mm |
Dimension Tolerance |
¡À0.2 |
¡À0.05 |
Clear Aperture |
> 80% |
Deviation |
180 degrees ¡À 3 arc seconds |
180 degrees ¡À 2 arc seconds |
Flatness |
¦Ë/4 at 632.8 nm on big surface
¦Ë/10 at 632.8 nm on other surface
(per 25mm) |
¦Ë/8 at 632.8 nm on big surface
¦Ë/10 at 632.8 nm on other surface
(per 25mm) |
Surface Quality |
scratch and dig 60-40 |
scratch and dig 20-10 |
Wavefront Distortion |
¦Ë/2 at 632.8 nm |
Bevel |
0.5 (0/-0.3) mm |
Material, besides BK7, fused silica and any other materials are available.
Please show us the size and the coating specification. |
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