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  2. Anti-reflective coating - Wikipedia

    en.wikipedia.org/wiki/Anti-reflective_coating

    Uncoated glasses lens (top) versus lens with anti-reflective coating. The reflection from the coated lens is tinted because the coating works better at some wavelengths than others. An antireflective , antiglare or anti-reflection ( AR ) coating is a type of optical coating applied to the surface of lenses , other optical elements, and ...

  3. Optical coating - Wikipedia

    en.wikipedia.org/wiki/Optical_coating

    A woman wears sunglasses featuring a highly reflective optical coating Diagram of a dielectric mirror. Thin layers with a high refractive index n 1 are interleaved with thicker layers with a lower refractive index n 2. The path lengths l A and l B differ by exactly one wavelength, which leads to constructive interference.

  4. High-refractive-index polymer - Wikipedia

    en.wikipedia.org/wiki/High-refractive-index_polymer

    Such materials are required for anti-reflective coating and photonic devices such as light emitting diodes (LEDs) and image sensors. [ 1 ] [ 2 ] [ 3 ] The refractive index of a polymer is based on several factors which include polarizability , chain flexibility, molecular geometry and the polymer backbone orientation.

  5. Mirrored sunglasses - Wikipedia

    en.wikipedia.org/wiki/Mirrored_sunglasses

    Some high-end sun glass brands can come with anti-scratch coating. There can be steps implemented to protect the sunglasses and prevent scratching or damage. Clean the sunglasses regularly using sunglasses cleaning products like a microfiber cloth, or a sun glass cleaner. Avoid leaving your sunglasses in extreme heat or cold, like a car.

  6. Automatic number-plate recognition - Wikipedia

    en.wikipedia.org/wiki/Automatic_number-plate...

    Automatic number-plate recognition can be used to store the images captured by the cameras as well as the text from the license plate, with some configurable to store a photograph of the driver. Systems commonly use infrared lighting to allow the camera to take the picture at any time of day or night.

  7. Vehicle license plates of the United States - Wikipedia

    en.wikipedia.org/wiki/Vehicle_license_plates_of...

    a paper, cardboard, or lightweight plastic license plate, to be removed at the end of the temporary registration period (typically a set number of days, e.g., 15, 30, or 45 days); a standard metal license plate with temporary validation, in which case the government agency needs to issue only a validation sticker rather than a license plate; or

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