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Coating Film
- May 18, 2017 -

When the light enters the different delivery material (for example by air enters the glass), about 5% will be reflected, in the optical sight lens has many lenses and refraction mirror, the whole add up can let the incident ray loss to reach 30% to 40%. Modern optical lenses are usually coated with a single-layer or multilayer magnesium fluoride enhancement film. Single-layer enhancement film can reduce reflection to 1.5%, multi-layer permeability film can reduce the reflection to 0.25%, so the entire sighting mirror if appropriate coating, ray penetration rate of up to 95%. The lenses coated with single-layer amplification membranes are usually bluish-purple or red, and the lenses with multilayer penetration membranes are pale green or dark purple.