Glass that can change the direction of light propagation and change the relative spectral distribution of ultraviolet, visible or infrared light is called optical glass. Components made of optical glass are key elements in optical instruments. Optical glass is the foundation and important part of the optoelectronic technology industry.
In today's society, with the continuous integration of optics, electronic information science, and new material science, optical glass, as the basic material of optoelectronics, plays a major role in optical transmission, optical storage and optoelectronic display. The application of the field is advancing by leaps and bounds. Optical glass is widely used in all aspects of information collection, transmission, storage, conversion and display of optoelectronic products, which strongly promotes the development of optical glass to a higher level.
With the development of photonics technology, especially optical lenses, with the development of photonics technology, photons are the main carrier of information after electrons. The acquisition of information, Transmission, storage, display and processing technologies depend to a large extent on the development of advanced optical functional materials and devices.
Using the interaction of glass and light to change the polarization state, frequency, coherence and monochromaticity of light, and the new optical functional glass that generates and detects photons becomes optical glass The main direction of development.
Various color filters have the functions of absorbing, passing and blocking various light in the spectrum. If the light is absorbed less, the amount of light will be greater, and the negative film will have more exposure and greater density, and the shadow will be lighter on the photo; if the light is absorbed more, the amount of light will be smaller, and the amount of light will be less exposed on the negative film. The lens density is low, and the tones appearing in the photos are dense. When all the light is absorbed, the amount of light passing is equivalent to zero, and the negative film cannot be light-sensitive, and its density reaches the degree of transparency, and the picture becomes dark.
We already know that various colors of light can produce different effects on the photosensitive film through different optical filters; different colors of the subject can form different degrees on the photo Tone.
If the relationship between the color filter and the color of the subject is not properly grasped, the normal tonal contrast of the subject may be distorted and destroyed in the photo. In photography, in order to achieve the desired artistic effect, in order to highlight the scene of a certain tone, in the tonal processing, the method of focusing between the deep and the shallow tones is often used to set off the mirror, or to use the dark to line the light, or to use the light to support the dark.
Optical cold processing is mainly used in the production of optical components, providing lenses, lenses and other optical components for downstream industries such as optical instruments and optoelectronic image information processing products. It constitutes the entire industry chain Zhong is in the middle of the production of semi-finished products.
The optical cold processing steps are as follows:
The first step: milling, is to remove the uneven bubbles and impurities on the lens surface , (About 0.05-0.08) play a role in shaping.
The second fine grinding is to remove the damaged layer of the milled lens and fix the R Value.
The third polishing is to polish the finely ground lens again. This process is mainly to make the appearance better.
The fourth cleaning of the aspheric lens is to clean the polished lens with the polishing powder on the surface. Prevent pressure.
The fifth edging is to grind the original lens outer diameter to the specified outer diameter.
The sixth coating is to coat one or more layers of colored film or other film on the surface of the lens that needs to be coated
The seventh step of inking is to apply a layer of black ink on the outside of the lens to prevent reflections.
The eighth step of gluing, there will be 2 A lens with the opposite R value and the same outer diameter and material is combined with glue.
Special process: multi-piece processing (disc processing) and small spherical processing (20 points) Shaft) wire cutting