Inventory of the manufacturing process of glass mobile phone lenses

Commonly used processes for mobile phone lenses

Hardening: Generally, the surface hardness of the sheet after forming is low, so it is necessary to harden the surface of the lens. It can be cured on one side or on both sides. The principle of hardening is to increase the hardness of the resin surface by adding a harder coating on the surface of the resin. The hardening methods of the lens mainly include: dipping the lens in the hardening solution and spraying on the surface of the lens (Spraycoating). The spraycoating method is suitable for large flat plates, but the disadvantage is that the flatness is not easy to control. The Dipping method can control a fairly high level of flatness and is suitable for smaller lenses. By hardening, the surface hardness of the lens can be increased by more than 2 levels. Since the refractive/reflectivity of the hardening fluid is different from that of PMMA and PC, the phenomenon of rainbows is likely to appear on the surface of the lens after strengthening. The phenomenon of rainbows appearing on PCs is more significant and difficult to avoid. The holes and uneven areas on the lens are likely to cause hardening liquid to accumulate during hardening, so care should be taken when designing the structure. The strengthening process requires a special handle on the LENS, which should be paid attention to when making plastic molds. Strengthen different plastics and use different potions. After strengthening the LENS, the surface printing also needs to use a special process to ensure adhesion.

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Coating: For lens decoration, there will be some coating on the lens. Common coating methods for vacuum coating machines include sputtering coating and evaporation coating. The production cycle of evaporation coating is shorter. However, compared with the evaporation coating, the sputtering coating has a strong bonding force with the substrate, and the coating layer is dense and uniform. Common sputtering effects include metallic colors such as silver, bright silver, gold, gun color, etc. In addition, it can also be sputtered into a semi-transparent effect, which is a transparent lens when the backlight of the mobile phone screen is turned on. When the backlight is turned off, the phone screen becomes a mirror. Optical coating: The optical coating is alternately coated with SiO2 and TiO2 on the workpiece, through the control of the coating thickness and the number of coating layers,

Make the coating layer reflect light waves of different wavelengths. In this way, the coating has both a metallic texture and a variety of colors that ordinary metal coatings do not have. Optical coating can not only make the coating appear colorful, but also can coat the lens with anti-reflection coating. Through the anti-reflection coating, the light transmittance of the lens can reach more than 95%.

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Ink: Use special ink screen printing for PMMA board, which can achieve the effects of drawing, fluorescence (fluorescence in the dark), translucent, pearlescent, etc.

Laser paper: Through the laser paper, the characters and LOGO on the lens can produce a holographic effect. This effect can also be achieved by bronzing

Bronzing: Bronzing can hot gold, silver, laser and wire drawing and many other effects, which can greatly enrich the decorative effect of the lens.