Germanium 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.

Product introduction

Germanium is inert in air, water, base and many acids. The transmittance of germanium is very sensitive to temperature. In fact, the absorption of germanium becomes so great at 100 °C that it is almost opaque, and it is completely opaque at 200 °C. Germanium material has a high refractive index (about 4.0 at 2-14nm m band). When used as window glass, it can be coated as needed to improve the transmittance of the corresponding band. Moreover, the transmission properties of germanium are extremely sensitive to temperature changes (transmittance decreases with temperature increase), so they can only be used below 100℃. The density of germanium (5.33 g/cm3) should be considered in systems with strict weight requirements. The germanium window has a wide transmission range (2-μ16 m) and is opaque in the visible spectrum, making it particularly suitable for infrared laser applications. Germanium has a knoop hardness of 780, which is about twice as hard as magnesium fluoride, making it suitable for use in the IR field of variable optics.

Product features

■ Blocking visible region

■ Spectral range 2nm-15 nm

■ Wide transmission spectral range

■ Can be used as 2 nm long wave pass filter

■ Applications in infrared optical instruments, aerospace measurement and control, optical fiber communications, solar cells, chemical catalysts, biomedical fields.

The basic parameters

Surface accuracy：λ/ 2@632.8nm

Surface quality： 60-40（MIL）

Edge chamfering： < 0.3mm×45°

Size tolerance： +0.0/-0.2mm

Thickness tolerance： ±0.1mm

Clear aperture： >85%

Dimensions： according to customer requirements

Coating： according to customer requirements