Our company will participate in China International Opto-electronics Expo from September 16 to 18, 2021. China International Opto-electronics Expo is an influential comprehensive exposition of the global opto-electronics industry. It will be grandly-opened in Shenzhen International Convention and Exhibition Center (Bao 'an New Pavilion) from September 16 to 18, 2021, with an estimated exhibition area of 160,000 square meters. 3000 optics-related enterprises gathered at the expo. Our booth at: 7A73 booth, welcome to visit the guidance.    

Optical instrument manufacturing is a bai, the door of ancient engineering, du zhi, the telescope and microscope, camera, etc. Various kinds of optical instruments for optical zero dao of (lens, prism, etc.) in the process of machining, reflect does not produce high temperature and high temperature or high temperature phenomenon, and can achieve the processing effect of high temperature hot working, is called "optical cold working. The main processes of optical cold processing are: pressing, cutting, milling, fine grinding, polishing, edge grinding, joint, coating and so on. The final products of the downstream industry include digital cameras, camera phones, scanners, projectors, rear projection televisions, DVD players, bar code readers and other optical instruments and photoelectric digital products. Optical cold processing mainly processes optical lenses for its downstream products, which are divided into glass and plastic in terms of materials. Glass lenses are divided into plane mirrors and lenses. Plane mirrors include flat glass and prism, while lens includes spherical mirrors and aspherical mirrors. At present, the aspherical mirror processing of domestic enterprises is still in its infancy, and the glass spherical mirror is still the mainstream product.

The first: milling, is to remove the surface of the lens uneven bubbles and impurities,(about 0.05-0.08) play a molding role. The second is the fine grinding process, is to mill out the lens to eliminate its damage layer, fixed R value. The third step is the polishing process, which is to polish the finely ground lens in one time. This process is mainly to make the appearance better. The fourth way is cleaning, is to polish the lens after the surface of the polishing powder clean. To prevent that press a gram The fifth way is edge grinding, also known as coring, is to grind the original lens diameter to the specified outer diameter. The sixth is the coating, is the need to coating the lens surface with a layer or multiple layers of colored film or other film The seventh way is to paint ink, is to need the lens to prevent reflection on its outer yuan coated with a layer of black ink. The eighth way is glue, is to have 2 R value opposite size and outer diameter of the same material lens with glue. Special processes: multi-piece machining (plate machining) and small spherical machining (20 with shaft) line cutting according to different production workers Art, the process will be slightly different, such as the order of ink and glue

With a polishing machine and polishing powder or polishing fluid under the polishing to set the polishing time, pressure and other parameters. Should undertake cleaning immediately after polishing can soak, otherwise polishing powder can solidify on glass, can leave mark.

After the optical lens is finely ground by the abrasive solution, the surface of the lens still has about 2-3 m thick crack layer, the method to eliminate this crack layer is polishing. The polishing mechanism is the same as that of grinding, except that the tools materials are different from the polishing fluids....

Detailed description of optical cold working process data (process aging) 1. Polishing powder 1.1 Requirements for polishing powder A. Granularity should be uniform, hardness should be slightly harder than polishing materials; B. Polishing powder should be pure and free from impurities that may cause scratches; C. It should have certain lattice form and defect, and have appropriate self-sharpness; D. It should have good dispersibility and adsorption; E. Good chemical stability, will not corrode the workpiece. 1.2 Types and properties of polishing powder Common polishing powder has cerium oxide (CeO2) and iron oxide (FeO3). A. Cerium oxide polishing powder particles are polygonal with obvious edges and angles, with an average diameter of about 2 microns, Mohs hardness of 7 ~ 8 and specific gravity of about 7.3. Due to the manufacturing process and the different content of cerium oxide, cerium oxide polishing powder has white (content of 98% or more), light yellow, brown yellow and so on. B. Iron oxide polishing powder, commonly known as red powder, is spherical, particle size is about 0.5 ~ 1 micron, Mohler hardness is 4 ~ 7, specific gravity is about 5.2. The colors range from yellowish red to deep red. To sum up, cerium oxide has a higher polishing efficiency than red powder, but red powder is better for parts requiring high surface finish. 2. Polishing mold layer (underlying) material) commonly used polishing mold layer material polishing Glue and fiber materials. 2.1 polish glue Polishing adhesive, also known as polishing tar, is made up of rosin and asphalt in different proportions, used for precision polishing of optical parts 2.2 Fiber Materials In the polishing of optical workpiece, if the surface shape accuracy (aperture) of the polishing surface is not high, the long use of wool, felt and other fiber material as the material of polishing mold layer. 3. Common test instruments Some quality indexes of optical parts, such as radius of curvature of lens and Angle of prism, need to be measured by special measuring instrument. The commonly used instruments are: optical comparator side Angle instrument, laser plane interferometer, ball diameter instrument and knife edge instrument, etc.