Optics: measuring and testing – Position or displacement
Reexamination Certificate
2009-08-13
2011-10-25
Ton, Tri T (Department: 2877)
Optics: measuring and testing
Position or displacement
C356S615000
Reexamination Certificate
active
08045182
ABSTRACT:
A location detection apparatus is disclosed that includes: a light source; a light output side reflector having a reflecting surface for reflecting light from the light source to a space; a rotation mechanism for rotating the light output side reflector; a first light receiving element for receiving the light reflected from an object existing in the space; a light reception side reflector for reflecting the light from the object to the first light receiving element; a second light receiving element for receiving the light from the light output side reflector; a light conductor for conducting the light reflected from or transmitted through the reflecting surface toward the second light receiving element when the light output side reflector is in a predetermined position; and a rotational position detector that detects rotational position of the light output side reflector based on a detection result of the second light receiving element.
REFERENCES:
patent: 5745050 (1998-04-01), Nakagawa
patent: 5808727 (1998-09-01), Katayama
patent: 7602485 (2009-10-01), Mori
patent: 2005/0024625 (2005-02-01), Mori et al.
patent: A-2008-70199 (2008-03-01), None
Office Action mailed Jun. 8, 2010 from the Japan Patent Office in the corresponding patent application No. 2008-221516 (and English translation).
Fujita Mitsuru
Isogai Toshiki
Matsuoka Hisanaga
Matsuura Mitsuyasu
Oda Motoi
DENSO CORPORATION
Nippon Soken Inc.
Posz Law Group , PLC
Ton Tri T
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