Invention Grant
US08717677B2 Optical device and optical filter 有权
光学设备和光学滤波器

Optical device and optical filter
Abstract:
An optical device is provided. The optical device comprises a substrate having a coating region and a non-coating region. A first film is on the coating region, wherein the first film has a band edge structure extending to a portion of the non-coating region with an angle between a surface of the band edge structure and a surface of the first film to diminish the attenuation of an incident light beam.
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