Optical Window Glass AR Coated

Optical Window Glass Anti-reflective coat has one of the best anti-reflective performance and high light transmission for the visible wavelength range. Antireflective or anti-reflection (AR) coating is an optical coating procedure that is applied to the surface of lens optic, glasses, or other optical devices to reduce or stop reflection. In typical imaging systems, this improves efficiency since less light is lost due to reflection. In complex systems such as telescopes and microscopes, the reduction in reflections also improves the contrast of the image by eliminating stray light. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer’s binoculars or telescopy. This Coating is designed to maximize the amount of light that transmits or enters the surface of the window thereby minimizing the light lost by the reflective surface. The coatings improve the efficiency of optical instruments, enhance contrast in imaging devices, and reduce scattered light that can interfere with the optical performance of telescopes, cameras, and binoculars, and decreases glare on eyeglasses. The vacuum-deposited dielectric optical thin-film layers adapt the refractive index of the substrate glass to the ambient air. But, the multi-layer coating reduces the reflection from glass surfaces to a minimum. Moreover, as the coated surface have an anti-reflective performance the uncoated surface reflects about 4% of the visible wavelength spectrum. The multilayer anti-reflective performance is better than the single-layer anti-reflective performance. The Optical Window Glass AR Coated broadband anti-reflection Coating suppresses unwanted secondary reflection like the transmitted image superimposed with a weak identical ghost image which will result in degraded and blurred appearance. As a result of this, the end product is sharper, brighter, and offers much better contrast to the image. The AR Coated optical window glass, is vacuum evaporated multilayered and this reduces glass glare with an upshot on brightness, transmission, and reflection. It is also broadly used for LCD modules, display panels, and medical devices the coated glass has an excellent surface finish and is available in custom thicknesses to as low as 0.10mm thick.

Types Of Optical Window Glass Anti-reflective Coating


Single-Layer AR Coating

The major agent used for the Optical Window Glass Anti-reflective Coating is Magnesium Fluoride (MgF2) which is used for mainly Broadband AR (BBAR) coating and is mainly for visible light applications. Magnesium fluoride has a refractive index of 1.38 which is close to the anti-reflective ideal index of refraction of 1.23. Apart from the Magnesium fluoride for single-layer AR coating, you can also use the other dielectric coating materials for applications targeting wavelength ranges outside of the visible spectrum. You can also use Silicon Nitride (Si3N4) and Titanium Dioxide (TiO2) for solar cell photovoltaics in the near-infrared region (NIR). At Alpine research optics you will get the best of optical laser optics.

Multi-Layer AR Coating

 Just as the name implies, a multi-layer coating uses several layers of a thin film coating to reduce the amount of light that is reflected. This system of coating reduces reflection to less than 0.1% of the incident light. There is a reflection between air and the coating (air-coating), at each interface between coating layers (coating-coating), and again between the coating and the substrate (coating-substrate). The material and thickness of each layer of the coating are designed to maximize the destructive interference of the reflected light to maximize transmission.

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