OPTICAL THIN-FILM COATING OF A LENS BARREL
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Dec 26, 2013
filing date -
Dec 26, 2013
priority date (Note) -
Abandoned
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Abstract
Portions of a lens barrel for an optical imaging system can be coated with an optical thin-film coating to prevent unwanted light, such as flare, from reaching an image sensor. The optical thin-film coating can be a multi-layered structure formed from alternating layers of a low-refractive-index material and a high-refractive-index material. The coating can have low absolute reflectance (e.g., less than 1% across the wavelength range of visible light) and can be applied to a front surface and/or other surfaces of a lens barrel.
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