Lens knowledge and the principle of optical coating


Step 1: Choice of optical lens design

  Progressive multifocal lens: for presbyopic patients Said this is an ideal lens. Since the invention of the first Essilor progressive lens. Patients over the age of 40 can enjoy natural vision from near to far. Essilor progressive multifocal lenses provide patients with optical lenses with a wide and uninterrupted field of view, and make your appearance look younger.

  Step 2: Lens material selection

  you You should tell your eye care professional (or fitting person) your hobbies, occupation, taste, etc. As long as the above points are combined, they can determine which type of lens made of material will provide you with a comfortable feeling and Clear vision.

  Glass lens: Glass lens is a very wear-resistant lens, but the glass lens is heavy and easy to be broken, so it is not suitable for elementary school students and people who often spend time outdoors. wore.

  Resin lens: It will become the most commonly used optical lens in the world. This kind of lens has strong impact resistance and only half the weight of glass lens.

  High refractive index lenses: It is recommended for patients with deeper luminosity to wear. High refractive index lenses are lighter and thinner than standard lenses, but the weight of high refractive index glass is not It will be greatly reduced, only a little lighter.

  Step 3: Choice of lens surface treatment

   There are many ways to coat the surface of the lens. It allows you to The lens looks more attractive, and at the same time can improve the transmittance of the lens.

  Abrasion coating treatment: This hardening coating treatment method can make the resin lens more durable. The inner and outer sides of the lens must be hardened, which is more resistant to the focusing lens. Abrasion.

   Anti-reflective film (also known as composite film): This film layer subtracts unnecessary reflected light on the lens, thereby providing you with clear vision, but also Makes you look more beautiful, because what others see directly is your eyes, not the annoying reflected light.

  Diamond crystal: This is a new comprehensive processing method, it provides a good coating combination, it It has the functions of anti-wear, easy cleaning and reducing reflected light.

  1. Vacuum coating Vacuum coating: Vacuum coating mainly refers to coatings that need to be performed under higher vacuum, including vacuum ion evaporation, magnetron sputtering, MBE molecular beam epitaxy , PLD excitation aspheric mirror light sputtering deposition and many other coatings, so. There are two main types of evaporation and sputtering. The material to be plated is made into a substrate, and the electroplating material is used as a target or medicine. The substrate is in the same vacuum as the target.

  2, the evaporation coating is usually to heat the target, so that the surface components evaporate in the form of free radicals or ions, and through the film forming method (scattering island structure-ladder structure -Layered growth) deposited on the surface of the substrate, a thin film.

  3. For sputtered coatings, it is easy to understand that the target material is bombarded with electrons or high-energy lasers, and the surface components are sputtered in the form of free radicals or ions. Finally, it is deposited on the surface of the substrate and finally forms a thin film.

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