Optical movement detecting device and transport system using...

Details Optical movement detecting device and transport system using... Optical movement detecting device and transport system using...

2005-02-22

2005-02-22

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

C356S400000

Reexamination Certificate

active

06859266

ABSTRACT:
In an optical movement detecting device, two semiconductor lasers irradiate an object with respective light beams to form two light spots on the object. Two light-receiving elements receive the two light beams reflected from the two light spots respectively and traveling in a predetermined direction. Based on a difference in phase between two signals S1, S2outputted from the two light-receiving elements, a signal processor derives a movement speed of the object.

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