Optical displacement sensor and external force detecting device

Details Optical displacement sensor and external force detecting device Optical displacement sensor and external force detecting device

2007-05-22

2007-05-22

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231130, C345S161000

Reexamination Certificate

active

11127709

ABSTRACT:
An external force detecting device comprises a hollow-cylindrical support section, an action section disposed centrally inside the support section, and an optical displacement sensor which includes, at the action section on its center axis: a light source to emit a light beam in a direction along the center axis of the action section; a light branching member to branch the light beam into three light beams to progress respectively in three directions oriented at an equi-angular distance; and a light reflecting member to reflect the three light beams in a direction parallel to a plane perpendicular to the center axis, and which also includes, at the support section, three light receiving elements arranged in a rotation-symmetric manner at a 120 degree interval with their light receiving faces looking toward the center axis of the action section so as to receive respectively the three light beams reflected.

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patent: 2006/0043273 (2006-03-01), Kitamura et al.
patent: 03-245028 (1991-10-01), None

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