| Material |
BK7,
UV grade Fused Silica(FS) |
| Dimension
Tolerance |
+0.0/-0.2mm |
| Thickness
Tolerance |
±0.2mm |
| Clear
Aperture |
>90% |
| Flatness |
λ/8@632.8nm
per 25mm range |
| Parallelism |
<1 arc minute |
| Surface
Quality |
60/40 scratch and dig |
| Coating |
Dichroic coating on one side, rear side AR coated, reflected
wavelength R>99.5%, transmitted wavelength T>85% |
| Damage
Threshold |
>10J/cm2,
20ns, 20Hz, @1064nm |
| Standard
Wavelength |
1064/532nm |
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