Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-05-16
2006-05-16
Allen, Stephone B. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C181S157000, C381S423000, C250S231100
Reexamination Certificate
active
07045768
ABSTRACT:
A displacement/quantity of light converter in which sensitivity to a micro displacement due to sound of a diaphragm, or the like, can be enhanced easily. In the displacement/quantity of light converter where a light emitting part (2) and a light receiving part (3) are disposed oppositely to a diaphragm (1), light emitted from the light emitting part (2) and reflected off the diaphragm (1) is received at the light receiving part (3), and a displacement of the diaphragm (1) is converted into an output from the light receiving part (3), a concave diaphragm is used and the concave face is directed toward the light emitting part (2) and the light receiving part (3). According to the arrangement, light emitted from the light emitting part (2) and reflected off the diaphragm (1) impinges efficiently on the light receiving part (3) in the form of focused light.
REFERENCES:
patent: 3327584 (1967-06-01), Kissinger
patent: 3389372 (1968-06-01), Halliday et al.
patent: 4422182 (1983-12-01), Kenjyo
patent: 4799751 (1989-01-01), Tekippe
patent: 5995260 (1999-11-01), Rabe
patent: 2004/0238267 (2004-12-01), Sakamoto et al.
patent: 4-120428 (1992-04-01), None
International Search Report.
Sakamoto Yoshio
Shinzou Toru
Allen Stephone B.
Kabushiki Kaisha Kenwood
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
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