Deflection angle detecting device

Details Deflection angle detecting device Deflection angle detecting device

2006-12-19

2006-12-19

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

Angle measuring or angular axial alignment

C385S018000

Reexamination Certificate

active

07151596

ABSTRACT:
A deflection angle detecting device includes a light source, a path switching plane switching the optical path of part of light radiated from the light source, a detecting reflection surface placed on the optical path switched by the path switching plane and provided to the light-deflecting element, and a photodetector receiving light reflected by the detecting reflection surface to detect the deflection angle of the light-deflecting element in accordance with the position where the light is received. In this case, a transmission surface with positive power is interposed between the detecting reflection surface and the photodetector.

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