Title:
DISPLACEMENT/QUANTITY OF LIGHT CONVERTER
Document Type and Number:
WIPO Patent Application WO/2002/066939
Kind Code:
A1
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.
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Inventors:
SHINZOU TORU (JP)
SAKAMOTO YOSHIO (JP)
SAKAMOTO YOSHIO (JP)
Application Number:
PCT/JP2002/001423
Publication Date:
August 29, 2002
Filing Date:
February 19, 2002
Export Citation:
Assignee:
KENWOOD CORP (JP)
SHINZOU TORU (JP)
SAKAMOTO YOSHIO (JP)
SHINZOU TORU (JP)
SAKAMOTO YOSHIO (JP)
International Classes:
G01C3/06; G01D5/26; G01D5/28; G01H9/00; G01B11/00; H01L27/14; H04R23/00; (IPC1-7): G01H9/00; G01B11/00; G01D5/26
Foreign References:
| JPH04120428A | 1992-04-21 |
Other References:
See also references of EP 1371956A4
Attorney, Agent or Firm:
Okabe, Masao (Fuji Bldg. 2-3 Marunouchi 3-chome Chiyoda-ku, Tokyo, JP)
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