Application of vacuum coating machine on optical lens and application of UV light curing coating
The application of vacuum coating machine coating technology on optical lenses, the earliest lens is no optical coating, and some even the inner tube extinction and the edge of the lens black are not treated, then a single layer coating appears, but this is mainly used Used in military telescopes to achieve lens extinction and reduce the possibility of being discovered by the enemy (for example, the T* coating of Zeiss's top name was originally developed for military use), while in the field of civilian cameras, 1941 Kodak produced the first coated lens. Camera Ektra, but the development of coating technology should start from the very bitter horse lens of Pentax's SMC coating in the early 1970s.
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The coating on modern lenses can be divided into two types, one is called anti-reflection film, which increases the light transmittance, and the other is to change the color spectrum of the lens, such as a lens. The optical material used in a certain lens has a good index of refraction and the like, but it has a yellowish phenomenon. Then it is coated with a layer of spectrally interrupted film to correct the color cast (Princess Princess uses high refraction). Glass, so some are slightly yellowish, and now the development of coating technology can compensate for the inadequacies of some cheaper optical materials. The design of the lens does not have to be done using expensive special-specified optical glass as in the past, so new The lenses are generally coated on the air contact surface of each lens, which on the other hand highlights the important role of the coating on the lens.
When many people wear glasses, it is required to add a film to the lens. There are two main types of lens coating: one is anti-reflection film, that is, by coating a plurality of transparent materials with different refractive indices and different thicknesses on the front surface of the lens, the principle of optical interference is used to reduce the excess reflected light on the surface of the lens. When the anti-reflection film is added to the lens, the transparency of the light is increased, the wearer feels that the glare is reduced, and the object is more realistic and bright. The other is a hard film, mainly used for resin lenses. It is generally applied to the front surface of the lens to enhance the anti-wear ability of the resin lens, and the light permeability is also enhanced. When cleaning the hard-coated lens, the user should first clean the front and back surfaces of the lens with water, and then dry it with a clean soft cloth. Be careful not to wipe the lens when it is dry. If the ordinary lens can be seen clearly, there is no need to add a film. If it is to be added, the resin lens can be added with an anti-reflection film, or a hard film can be added. The glass lens is generally only provided with an anti-reflection film.
Application of UV-curing coatings on UV coatings
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In order to further integrate the vacuum coating vacuum coating and the light curing coating, a light curing coating device for vacuum coating has appeared on the market, which has more performance effects and practical value. It has been highly praised by people. So what is the composition of the vacuum curing coating equipment for vacuum coating?
The vacuum curing coating equipment for vacuum coating machine is not very different from the ordinary UV curing machine. The components are very similar. We also mentioned it in the previous UV curing machine. This is not mentioned in this article. But the biggest difference is the core component of the device, which is the configuration of the UV lamp. There are 9 sets of overhead lamps on the UV-curing coating equipment for vacuum coating: 3 sets of top lights, 5.6 kW for the top, 5.6 kW for the top, and 8.0 kW for the top; 2 for each left and right, 5.6 kW for the upper left The lower left is 5.6kW, the upper right is 5.6kW, and the lower right is 5.6kW; the bottom lights are 2 in total, which are 8.0kW at the bottom and 5.6kW at the bottom. The lamp can be adjusted according to the upper, lower, left, right, front and rear directions. The entire layout is illuminated by a cube. It greatly enhances the practicality, and the number of ultraviolet lamps can be turned on as needed during production. Of course, if the applicability is not strong, it is a waste of resources. Users should still choose according to actual needs when purchasing.
The vacuum-curing coating equipment for vacuum coating is more complicated than the UV-curable vacuum coating coating, but the operation is also simplified. The use of UV-curable vacuum coating coating requires manual control. With professional skills and years of experience, we can grasp the process, and vacuum coating machine coating with different light curing coating equipment, more intelligent. Its use process is:
1) Paint storage and inspection: The paint should be stored in a safe and clean place. Check the apparent viscosity, rheology and stability of the paint before painting.
2) Pretreatment of the workpiece: The surface of the plastic substrate is required to be smooth, without obvious surface defects, and then pretreated to remove oil stains, residual mold release agents, static electricity and dust on the surface of the substrate.
3) Coating of coating: According to the process specification, brushing, scraping, roller coating, shower coating, spraying, etc. are selected. The coating liquid is generally applied by shower coating and roll coating.
4) Leveling of the coating: After coating, it must have a certain leveling time, and sometimes it should be heated to a certain temperature (such as 40~60 °C) to promote leveling and solvent evaporation.
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5) Photocuring of the coating: the smoothed workpiece enters the photocuring section, and the coating film is rapidly solidified by the ultraviolet light emitted by some radiation sources. In advance, you must select the type, quantity, arrangement, and distance from the workpiece.
6) Extension of the coating after UV curing: After a certain period of extension and standing, the workpiece enters the vacuum coating equipment.
One of the most critical steps is the photocuring of the coating, but since the UV lamp for the vacuum curing coating equipment can freely select the number of light sources, it will be easier to grasp. However, it is important to pay attention to the calculation of the curing time. If it is not completely cured, it will cause serious consequences.