| |
Normal |
High Precision |
Mfg. Limit |
| Material: |
BK7,grade B,fine annealed optical glass |
BK7,grade A,fine annealed optical glass |
BK7,grade A,fine annealed optical glass |
| Wavefront Distortion: |
¦Ë/2 at 632.8nm over the clear aperture |
¦Ë/4 at 632.8nm over the clear aperture |
¦Ë/10 at 632.8nm over the clear aperture |
| Clear Aperture: |
>=central 80% of diameter |
>=central 85% of diameter |
>=central 90% of diameter |
| Surface Quality: |
60-40 scratch-dig |
40-20 scratch-dig |
20-10 scratch-dig |
| Parallelism: |
1 arc min |
30 arc seconds |
5 arc seconds |
| Diameter: |
+0/-0.15mm |
+0/-0.01mm |
+0/-0.1mm |
| Thickness : |
+/-0.25mm |
+/-0.1mm |
+/-0.05mm |
| Bevel: |
<0.5mmX45¡ã |
<0.3mmX45¡ã |
<0.3mmX45¡ã |
