A sapphire window plate made of single crystal sapphire material, which itself includes a sapphire optical window and a sapphire protective window. Due to its special material, it has advantages such as infrared transmission, electrical insulation, corrosion resistance, and intrinsic safety.

Sapphire optical window plate refers to sapphire window plate products used for optical purposes, generally including imaging, detection, scanning, etc. Due to its full spectrum transmission capability from ultraviolet to near-infrared, it can reduce the amount of glass used in optical instruments and significantly reduce the weight of the equipment. However, the transmittance of sapphire material is only between 82-85%. In order to increase the transmittance of specific bands or prevent the transmittance of specific bands, special coating treatments such as AR coating, AF film, etc. are often required for the window plate. In high-intensity laser applications, the requirements for coating are higher.

Main advantages of sapphire window panel:

1. Intuitive: Transparent to ultraviolet, visible, and infrared rays, suitable for current infrared thermal imagers, infrared point thermometers, and ultraviolet thermal imagers;

2. Safety: The use of window panels can avoid harm to users caused by harsh environments such as electromagnetic radiation, high voltage, and high temperature, and safely detect the contact temperature of various high-temperature equipment with electricity;

3. Quick: After installation, it is easy to open the protective cover and quickly observe multiple targets for internal inspection;

4. Save money: By using window panels, users can conduct preventive inspections of hazardous areas without interrupting or interfering with equipment operation. No need for power outages and maintenance, thus saving a lot of money;

5. No special maintenance required: can be used for more than 10 years without external damage.

Sapphire, as an excellent filter material, has good transmittance in the ultraviolet, infrared, and visible light bands, and a series of excellent physical and chemical properties such as high strength, high hardness, high temperature resistance, friction resistance, corrosion resistance, good light transmission performance, and excellent electrical insulation performance. In order to meet higher requirements for sapphire window panels, higher processing demands have also been put forward. For the consistency of spectral transmission, it is necessary to ensure the parallelism of the window (i.e., consistent coordination on both sides to solve the optical path problem); Secondly, there are strict requirements for the flatness (surface shape) of any plane, which is required to be within the nanometer range, known as wavelength in optical terminology, and generally within 1/4 wavelength.