Silicon optical window plate

Optical window plate is a kind of double-sided polished parallel plate, the surface quality of optical glass with optical level, will not change the multiplier of the optical system, Commonly used as protective glass for optical detectors, sensors, optical lenses, detectors, etc. Substrate materials include various optical glass, ultraviolet fused quartz, infrared fused quartz, calcium fluoride(CaF2), magnesium fluoride(MgF2), zinc selenide (ZnSe), germanium(Ge), silicon(Si) and other crystal materials. And provide anti-reflection coating, high reflective coating, spectroscopic coating, metal coating and other optical coating. When choosing an optical window, consider whether the material transmission and mechanical properties of the window fit your application. Yukang photonics can provide a variety of materials to respond to a variety of industrial production scenarios.

The optical window filters produced by yukang photonics are divided into three categories: ultraviolet window, visible window and infrared window. The best solution can be selected according to the specific requirements of customers.

While serving as window protection, it does not lose light ehergy, improve transmittance, increase hardness, reduce reflection and increase surface smoothness. Application fields involve various aspects, such as: smart home system, biometrics system, intelligent robot accessories, laser barcode scanning, infrared remote control, medical device display window, camera UV mirror, etc.

Silicon (Si) monocrystal is a chemically inert material with high hardness and insoluble in water. It has good light transmittance in the 1-7 nm band, and also has good light transmittance in the far infrared band 300-300 nm, which is a characteristic that other optical infrared materials do not have. Silicon (Si) monocrystalline crystals are commonly used as substrates for 3-5μm medium-wave infrared optical Windows and optical filters. Because the material has good thermal conductivity and low density, it is also a common material for making laser reflector or infrared temperature measurement and infrared optical lens.
 

Product features

The product is suitable for the near infrared band of 1.2nm-8 nm region. Because silicon has a low density (its density is half that of germanium or zinc selenide), it is very suitable for applications sensitive to weight requirements, especially in the 3-5μm band. Silicon has a knoop hardness of 1150 and is harder than germanium, which is not brittle. However, due to its strong absorption band at 9 μm, it is not suitable for transmission applications of CO2 lasers.

Technical indicators

Dimensions： according to customer requirements

Diameter tolerance： +0/ -0.2mm

Thickness tolerance： ± 0.2mm

Surface quality： 60-40（MIL）

Surface accuracy：λ/ 2@632.8nm

Clear  aperture： > 90%

Edge chamfering： < 0.25mm×45°

Coating： according to customer requirements