Windows
Windows
Overview
Windows are applied to isolate different physical environments while allowing light to passing through. When selecting windows, it's impossible to consider materials, transmission, scattering, wave front distortion, parallelism and resistance to certain environment. JH Optek offers all kinds of windows, which are made from different materials. Windows of special sizes and materials are available upon requirement.
Single layer or multiplayer anti-reflecting or high-reflecting coatings on optical windows are available upon customer's requirement.
Specification | BK7 Windows | Fused Silica Windows | MgF2/CaF2 | Sapphire |
| Diameter Tolerance | +0.0, -0.1mm | +0.0, -0.1mm | +0.0, -0.1mm | +0.00nm, -0.2mm |
| Thickness Tolerance | ±0.2mm | ±0.2mm | ±0.2mm | ±0.2mm |
| Clear Aperture | >80% | >80% | >80% | >85% |
| Parallelism | 1'(Standard), 10"(High Precision) | 1'(Standard), 10"(High Precision) | ≤1minutes | ≤1minutes |
| Surface Quality | 60/40(Standard), 10/5(High Precision) | 60/40(Standard), 20/10(High Precision) | ≤1minutes | 60/40(Standard), 10/5(laser quality) |
| Wavefront Distortion | λ (Standard), λ /10(High Precision) per 25mm @633mm | λ (Standard), λ /10(High Precision) per 25mm @633mm | l /2 at 632.8 nm | 1/10λ @ 633mm |
| Bevel | <0.25mm x 45° | <0.25mm x 45° | Protective bevel | Protective bevel |
| Coating | 1 /4 wave MgF2@550nm | Uncoated | Based on requested | Based on requested |
| Chamfer | <0.25mm x 45° | |||
| Substrate Material | UV grade fused silica, or BK7 glass |