サファイア結晶 | Sapphire Crystal

    仕様
| Orientation: | or +/- 5 deg | 
|---|---|
| Diameter Tolerance : | +0.0 /-0.1 mm | 
| Thickness Tolerance: | +/-0.2 mm | 
| Surface Quality: | better than 80/50 scratch/ dig | 
| Parallelism: | < 30 arcsec | 
| Flatness: | < λ per 25 mm @632.8 nm | 
| Perpendicularity: | < 5 arcmin | 
| Wavefront Distortion: | < λ/2 @632.8 nm | 
| Coating: | Coating upon Request | 
