Processing Method Of Sapphire Optical Window

Sapphire optical window lens can be widely used in security, car wear, digital cameras, lasers, optical instruments, and other fields. With the continuous development of the market, lens technology is more and more widely used. Convex lens: thick in the middle and thin at the edge, including biconvex, flat-convex, and concave-convex; Concave lens: thin in the middle and thick at the edge, including double concave, flat-concave, and convex-concave.

Sapphire light window sheet adopts the following processing methods

1. The principle of hydrated polishing and hydrated polishing of sapphire optical window sheet is: during the processing of ceramic polishing machine, the friction between polishing disc and sapphire surface, high temperature, and high pressure is generated at the contact point, and the atoms on the sapphire surface are activated. Superheated water vapor molecules and water are used as its surface to form a hydrated chemical reaction layer on the interface, and then with the help of superheated water vapor, The friction between them is used to remove the hydrated layer on the sapphire surface, so as to achieve ultra-precision machining surface.

2. The principle of laser polishing and laser polishing sapphire is: through the thermal and photochemical interaction between laser and sapphire, it can be divided into cold and hot polishing methods. Cold polishing uses a short wavelength laser to chemically decompose and remove materials. After sapphire surface materials absorb light molecules, the structure of surface materials will be damaged so that the surface materials leave the body to remove materials. The thermal polishing of sapphire optical window slice generally adopts continuous long-wavelength laser to remove the material surface components by melting and evaporation, but it has a large thermal temperature gradient and large thermal stress, which is easy to cause cracks and large surface roughness, so it is more suitable for rough polishing. The cold polishing process has low thermal stress and few cracks, which is suitable for ultra-precision polishing.