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 Commercial Quality Optical WindowsMaterial: BK7,
UV Fused Silica
(CaF2, Si,
Ge, etc. upon request)
Surface quality: 60-40 scratch/dig
Surface figure:  /4
Clear aperture: 80% of the diameter
Diameter tolerance: + 0.0 mm; -0.15 mm
Thickness tolerance:  0.2 mm
Parallelism: 2 arc min |
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| | Size, mm | Thickness, mm | BK7 / Price, USD | UV Fused Silica / Price, USD | CaF2 / Price, USD |
| | 8 dia. | 2.0 | CW0208 /
10 | CW1208 / 13 | CW2208 / 20 |
| 12.5 (12.7) dia. | 3.0 | CW0212 / 11 | CW1212 / 16 | CW2212 / 25 |
| 20 dia. | 3.0 | CW0220 / 13 | CW1220 / 22 | CW2220 / 36 |
| 25 (25.4) dia. | 3.0 | CW0225 / 14 | CW1225 / 28 | CW2225 / 45 |
| 38 (38.1) dia. | 4.0 | CW0238 / 18 | CW1238 / 45 | CW2238 / 80 |
| 50 (50.8) dia. | 4.0 | CW0250 / 28 | CW1250 / 65 | |
| 15 x 25 | 3.0 | CW0215x / 16 | CW1215x / 28 | |
| 20 x 20 | 3.0 | CW0220x / 16 | CW1220x / 28 | |
| 25 x 38 | 4.0 | CW0225x / 20 | CW1225x / 45 | |
| 40 x 40 | 4.0 | CW0240x / 30 | CW1240x / 60 | | | |
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