Optical sensor and image forming apparatus that processes...

Details Optical sensor and image forming apparatus that processes... Optical sensor and image forming apparatus that processes...

2008-03-07

2010-02-02

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C399S049000

Reexamination Certificate

active

07655936

ABSTRACT:
An optical sensor includes at least one light emitting unit that emits a light, a first light receiving unit that receives specular reflection light from an illumination object when the light is incident on the illumination object with an incidence angle and specularly reflected with a reflection angle, and a second light receiving unit that receives diffuse reflection light from the illumination object when the incident light is diffusely reflected at the illumination object. The sum of the incident angle and the reflection angle is 25 degrees or less.

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