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The role of vacuum coating

The role of vacuum coating

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  • Time of issue:2020-03-05 13:40
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(Summary description)Vacuum coating is mainly to reduce reflection. In order to improve the light transmittance of the lens and the quality of the image, the lens must be vacuum coated in the modern lens manufacturing process. The vacuum coating of the lens is based on the principle of optical interference. The surface of the lens is coated with a quarter-wavelength substance (usually fluoride) to minimize the reflection of the colored light of this wavelength. Obviously, a layer of film only works on one color light, while a multilayer vacuum coating film can work on multiple colors.

The role of vacuum coating

(Summary description)Vacuum coating is mainly to reduce reflection. In order to improve the light transmittance of the lens and the quality of the image, the lens must be vacuum coated in the modern lens manufacturing process. The vacuum coating of the lens is based on the principle of optical interference. The surface of the lens is coated with a quarter-wavelength substance (usually fluoride) to minimize the reflection of the colored light of this wavelength. Obviously, a layer of film only works on one color light, while a multilayer vacuum coating film can work on multiple colors.

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2020-03-05 13:40
  • Views:
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Vacuum coating is mainly to reduce reflection. In order to improve the light transmittance of the lens and the quality of the image, the lens must be vacuum coated in the modern lens manufacturing process. The vacuum coating of the lens is based on the principle of optical interference. The surface of the lens is coated with a quarter-wavelength substance (usually fluoride) to minimize the reflection of the colored light of this wavelength. Obviously, a layer of film only works on one color light, while a multilayer vacuum coating film can work on multiple colors.

  Multi-layer coating usually uses different materials to coat the surface of the lens with different thicknesses repeatedly. Multi-layer vacuum coating can greatly increase the light transmittance of the lens. For example, the reflectivity of each surface of the uncoated lens is 5%, and the single-layer vacuum coating reduces to 2%, while the multilayer vacuum coating can reduce to 0.2% In this way, the diffuse reflection between the lenses of the lens can be greatly reduced, thereby improving the contrast and sharpness of the image.

When light enters different transmission materials (such as from air into glass), about 5% will be reflected off. There are many lenses and refractors in the optical sight, which can make the incident light loss up to 30% to 40%. . Modern optical lenses are usually coated with a single-layer or multilayer magnesium fluoride anti-reflection coating. A single-layer anti-reflection coating can reduce reflection to 1.5%, and a multi-layer anti-reflection coating can reduce reflection to 0.25%. If the mirror is properly vacuum coated, the light penetration rate can reach 95%. Lenses coated with a single-layer anti-reflection coating are usually blue-violet or red, while lenses coated with a multi-layer anti-reflection coating are light green or dark purple.

  Vacuum coating is commonly used on corrective glasses such as camera lenses, myopia, hyperopia, and reading glasses.

  Vacuum coating is to coat a very thin transparent film on the surface. The purpose is to reduce light reflection, increase light transmittance, anti-ultraviolet rays and reduce glare and ghosting; different colors of vacuum coating also make the image color balance different. In addition, vacuum coating can still delay the time of lens aging and discoloration.

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