Material: Bk7, Fused Silica, and etc

Specifications
| Material |
Bk7, fine annealed (other material upon
request) |
| Dimensions Tolerance |
0.0/-0.15 mm |
| Surface Flatness |
λ/4 @ 632.8 nm |
| Reflecting Face Flatness |
λ/10 @ 632.8 nm |
| Reflected Beam Deviation |
90°±30", 45°±3' |
| Surface Quality |
40-20 scratch & dig |
| Clear Aperture |
90% of dimension |
| Chamfers |
0.1- 0.25 mm x 45° |
| Coating |
Upon Request |
Note: Special material and size are available
upon request.