optical coating can simultaneously reflect and transmit the same wavelength, or color – Science Daily

For more than a century, optical coatings have been used to better reflect certain wavelengths of light from lenses and other devices or, conversely, to better transmit certain wavelengths through them. For example, the coatings on tinted eyeglasses reflect, or “block out,” harmful blue light and ultraviolet rays.But until now, no optical coating had ever been developed that could simultaneously reflect and transmit the same wavelength, or color.
In a paper in Nature Nanotechnology, researchers…

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