Optical system and optical quality measuring apparatus
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United States of America Patent
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Aug 1, 2017
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app pub date -
Feb 26, 2015
filing date -
Feb 28, 2014
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Abstract
An optical system comprising: a light source; a photodetector; a first light-receiving system for causing the photodetector to receive first reflected light with a first angle of reflection from a surface; and a second light-receiving system for causing the photodetector to receive second reflected light with a second angle of reflection, different from the first angle of reflection, from the surface is provided. Here, a first light-receiving area of the photodetector with respect to light, of reflected light from the surface, via the first light-receiving system is spaced apart from a second light-receiving area of the photodetector with respect to light, of the reflected light from the surface, via the second light-receiving system.
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