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An optical window is applied to isolate different physical environments while allowing light to pass. When selecting windows you should consider materials, transmission, scattering, wave front distortion, parallelism and resistance to certain environment.
Oplens offers a wide range of different materials and different shapes of optical windows.
You are welcome to contact us for customized optical windows!
Parameters
| Material | BK7 and Fused silica typically, Visible optical glass,Infrared optical glass, Colored glass. | |||
| Tolerances | Low precision | Standard precision | High precision | |
| Glass Quality | nd | ±0.001 | ±0.0005 | ±0.0001 |
| vd | ±0.8% | ±0.3% | ±0.1% | |
| Dimension Tolerance（mm） | ±0.20 | ±0.10 | +0.01/-0.01 | |
| Thickness Tolerance（mm） | ±0.20 | ±0.1 | ±0.005 | |
| Scratch—Dig | V（80—50） | IV（60—40） | II（20—10） | |
| Wave front Distortion 632.8nm | λ per 25mm | λ /4per 25mm | λ /20 per 25mm | |
| Clear Aperture | 80% | 90% | 100% | |
| Parallelism (arc min) | 3-5 minutes | 1 minutes | ＜1 second | |
| Bevel | 0.3±0.20mm×45° or upon requirement | |||
| Coating | Coating may be available by custom order | |||
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