How to polish optical lenses?

Polishing methods of optical lens include heat flow method, etching back method, rotating glass method, electron surrounding vibration method, low pressure CVD, selective deposition, deposition-corrosion-deposition, plasma enhanced CVD and so on.

These technologies have been used in the development of material planarization technology. Because these technologies belong to local planarization technology of materials, in order to realize global planarization, chemical mechanical polishing technology using polishing powder has gradually begun to develop.

The glass originally used to make lenses is a knot in one's heart on ordinary window glass or wine bottle, which is similar in shape to "crown", so it is named crown glass or crown brand glass. At that time, the glass was extremely uneven and foamed.

Extended data:

Lens coating

In order to obtain some new excellent properties, single-layer or multi-layer optical films with a certain thickness were plated on the lens by physical and chemical methods.

Strengthening film, also called hard film, is a layer of metal oxide with refractive index similar to that of lens, mixed with coupling agent. It has the characteristics of high hardness, high adhesion and high light transmittance. , can effectively improve the wear resistance of the lens, is not easy to peel off and yellow, and greatly prolongs the service life of the lens.

Anti-reflection film is also called anti-reflection film, which uses the interference principle of light to interfere with the light reflected from both sides of the film, thus canceling each other, reducing or eliminating the light reflection of the lens, thus improving the transparency of the lens.