sapphire crystalAn important point is that in addition to having good hardness, it also has good electrical and dielectric properties, as well as chemical corrosion resistance, high temperature resistance, good thermal conductivity, and chemical stability. Therefore, it can be used to manufacture optical components, window panels, etc. Sapphire window panels can provide protection for optical systems or sensitive electronic devices from external environmental influences, and are optical glass composed of relatively parallel finely ground and polished surfaces. It is used to isolate two physical environments and allow light to pass through, and is widely used in projection systems, imaging systems, optical measurement systems, etc.

Sapphire window plate refers to a product used for optical purposes, generally including imaging, detection, scanning, etc. Due to the full spectrum transmission capability of sapphire glass from ultraviolet to near-infrared, window plates can reduce the amount of glass used in optical instruments and significantly reduce the weight of equipment. However, the transmittance of sapphire material is only between 82-85%. In order to improve the transmittance of specific wavelength bands or prevent their transmission, optical window plates often need to be coated with specially designed coatings, such as AR coatings, AF coatings, etc. Thin films and other materials have higher requirements for coatings in high-intensity laser applications.

In order to meet higher requirements for the product, higher demands have also been placed on the processing of window panels. In order to ensure the consistency of spectral transmission, it is necessary to ensure the parallelism of the window slice (i.e., consistent coordination on both sides to solve the optical path problem); Secondly, there are strict requirements for the flatness of any plane. The flatness requirement is in the nanometer range, which is called wavelength in optical terminology and is generally required to be within 1/4 of the wavelength. The pressure resistance, scratch resistance, and high temperature resistance of sapphire glass are used to protect users or items inside containers as window products. Due to its excellent hardness, sapphire has stronger pressure resistance and scratch resistance than other glass products. Meanwhile, sapphire can withstand temperatures up to 2030 degrees Celsius and is commonly used in high-temperature container applications.