Optical lens requirements for polishing powder and judgment quality?

Optical lens requirements for polishing powder and judgment quality?

Optical lenses are mainly used in optical instruments, mirrors and other products. When polishing optical lenses, what are the requirements for polishing powder? What are the requirements for judging the quality of optical lenses?


1. The powder particle size of the optical lens is fine and uniform, within the allowable range; the purity is high and does not contain mechanical impurities.

2. The powder particles need to have a certain lattice shape, and when broken, sharp edges and corners can be formed to improve the polishing efficiency.

3. It has good dispersibility to ensure the high efficiency and uniformity of the processing process, and a dispersant can be appropriately added to improve the suspension rate.

4. It has appropriate density and hardness, and has good wettability and suspension with water. The larger the polishing powder needs to be mixed with water, the greater the grinding force and the more suitable for harder materials. Attention should be paid to the laser focusing mirror. , the particle size of all polishing powders has a distribution problem. The average particle size or the size of the median diameter D50 only determines the polishing speed, while the larger particle size Dmax determines the polishing accuracy. Therefore, in order to achieve high precision requirements, it is necessary to control the larger particles of polishing powder.
Optical lens requirements for polishing powder and judgment quality?
Requirements for judging the quality of optical lenses

Consistency between specific specific optical constants and the same batch of glass optical constants. Each optical lens has a specified standard refractive index value for light of different wavelengths, which is used as the basis for the design of the optical system. Therefore, the optical constants of the factory-produced optical lenses must be within the allowable deviation range of these values, otherwise the actual image quality will not meet the results expected in the design, affecting the quality of the optical instrument.

At the same time, since the same batch of instruments is usually made of the same batch of optical materials, in order to facilitate the unified calibration of the instruments, the allowable deviation of the refractive index of the same batch of optical lenses is stricter than its deviation from the standard value.

Highly transparent. The brightness of the optical system image is proportional to the transparency of the glass. The transparency of an optical lens to light of a certain wavelength is represented by the light absorption coefficient kλ. After light passes through a series of prisms and lenses, part of its energy is dissipated in the interface reflection of the optical components, and the other part is absorbed by the medium (glass) itself. The former increases with the refractive index of the glass, and this value is very large for high refractive index glasses. For example, the surface light reflection loss of resuspension glass for an optical lens is about 6%.

So today's explanation is here first. The above is the whole content of today. I believe that everyone has a certain understanding of the requirements for polishing powder and judging quality of optical lenses. Thank you very much for your patient reading. If you want to know more about optical lenses, you can contact us to consult with us.


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