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An interesting point here is that these coatings are anti-reflective films, but often because of the anti-reflective coating, a reflection of one color is found on the lens. In fact, it is not the extra reflected light, but the remaining reflected light. For example, the original reflected light is 300~750nm, but most of the light below 500nm and above 600nm can pass smoothly, after the light of 500~600nm is reflected, we will see green again on the film surface.
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    Every day, you will be exposed to the sun, including visible light, infrared light and ultraviolet light. But don't think that there is no ultraviolet light without the sun, as long as there is light, there must have...
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