Optical lens ultrasonic cleaning grinding powder is alkali metal oxide

by:Crylight     2021-05-28

In optical cold processing, the cleaning of optical lenses mainly refers to the cleaning of residual polishing fluid, adhesives, and protective materials after the lens is polished; the cleaning of edging oil and glass powder after lens edging; finger prints before lens coating, Cleaning of saliva circle and various attachments.

  The traditional cleaning method is to use wiping materials (gauze, dust-free paper) with chemical reagents (gasoline, ethanol, acetone, ether) to manually clean by soaking, wiping, etc. rub. This method is time-consuming, labor-intensive, and has poor cleanliness, which is obviously not suitable for the modern large-scale optical cold processing industry. This forces people to find a mechanized cleaning method instead. Therefore, ultrasonic cleaning technology gradually entered the optical cold processing industry and showed its talents, which further promoted the development of the optical cold processing industry.

  Ultrasonic cleaning is a kind of cleaning that uses the huge energy generated by the ultrasonic field in the liquid cleaning medium to achieve the purpose of cleaning by the laser focusing lens through the comprehensive action of physics and chemistry. Net means.

   Ultrasonic field provides huge energy for cleaning, but it also needs chemical lotion as a medium. Generally, chemical lotions are divided into two categories. One is organic solvents, which are mainly based on the chemical principles of similar compatibility. For organic substances such as: binders (asphalt, rosin, etc.), protective materials (asphalt, resin, etc.), grinding Dissolve the lubricant on the side.

  In the cleaning of optical lenses, trichloroethylene, aromatic hydrocarbons, freons, etc. were initially used as cleaning agents. Of course, these substances have strong solubility, but some are volatile , It is highly toxic, and some have a destructive effect on the ozone layer of the atmosphere, so it is gradually banned. Nowadays, some improved products of the above substances or some hydrocarbons are used as solvents in China.

  The cleaning of optical lenses mainly refers to the cleaning of residual polishing fluid, adhesives, and protective materials after optical lens polishing; the cleaning of edging oil and glass powder after optical lens edging Cleaning; cleaning of fingerprints, saliva circle and various attachments before coating of optical laser protective mirror lenses.

  The traditional method of cleaning optical lenses is to use wiping materials and chemical reagents to soak and wipe them manually. This method is time-consuming, labor-intensive, and has poor cleanliness, which is obviously not suitable for the modern large-scale optical cold processing industry.

  The neutral color filter can absorb most of the blue-violet light, has a larger absorption power, and a slightly lower pass rate. Compared with the tones of the photographed scene, the tones of the captured photos appear natural and moderate, achieving a more ideal effect. The color filter is a part that changes the color of the light beam. According to the needs, the corresponding color light source can be obtained by changing the filter of different colors.

   Another type of cleaning agent that is currently used more is a water-based cleaning agent with surfactant as the main component. The cleaning principle is simply due to the surfactant The molecular structure also contains lipophilic groups and hydrophilic groups, which have the characteristics of extremely laser collimator and structural asymmetry. It is this characteristic that makes it can greatly reduce the surface tension of the aqueous solution, so that the surface of the object is easy to wet, and the surface dirt is easy to be dissolved and dispersed in the cleaning liquid to achieve the purpose of washing.

  The material and grinding accuracy of the optical lens are different. Choose different types of grinding powder. The asphalt used in the grinding process plays a protective role to prevent the polished mirror surface from being Scratch or corrosion, the main purpose of optical lens organic solvent cleaning agent is to clean asphalt and lacquer. The previous solvent cleaning agent for optical lens mostly uses trichloroethane or trichloroethylene. Optical lens and long-term use of trichloroethylene can easily lead to occupational diseases. , And because trichloroethylene is very unstable, it is easy to hydrolyze and become acidic, so it will corrode the lens and equipment.

  The optical lens series products have different physical and chemical indicators, which can effectively meet the requirements of different equipment and process conditions. In the production process of a few enterprises, the surface of the optical lens There is a layer of lacquer that is difficult to handle. Optical lenses require the use of organic solvents with special solubility. The cleaning equipment of some optical lens companies has fewer condenser tubes in the solvent cleaning tank, and the free path is very short, requiring the use of slower volatilization organic solvents. ; The other part of the enterprise is the opposite, requiring the use of organic solvents that evaporate faster.

   Since the grinding powder of optical lens is an alkali metal oxide, the solvent is very weak to clean it, so the grinding powder produced during the processing of optical lens is basically cleaned in water. The water-based cleaning agent is removed from the unit, so extremely high requirements are placed on the water-based cleaning agent. In the past, because the domestic optical glass special water-based cleaning agent was less in variety, many foreign-funded enterprises chose imported cleaning agents, but there are currently domestic companies that have developed them. The optical glass cleaning agent has been successfully applied in several large-scale optical glass manufacturing plants in China, and the cleaning effect can completely replace imported products.

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