Title:
CLOCKING APPARATUS, CLOCKING METHOD, AND RANGE FINDER
Document Type and Number:
WIPO Patent Application WO/2002/048738
Kind Code:
A1
Abstract:
A laser range finder (100) comprising a pulse generating circuit (130) for generating a pulse laser beam repeatedly, a semiconductor laser (112), a photodiode (122) for receiving the laser beam, and a receiving circuit (150). A control circuit (160) measures the light receiving timing based on the count of clock pulses. The laser range finder (100) further comprises a circuit (140) for shifting the irradiation timing of laser beam from the clock pulse at a predetermined interval. Receiving timing of a pulse signal can be measured with a resolution shorter than the generation interval of clock pulse without requiring a high frequency oscillator.
Inventors:
INABA NAOTO (JP)
Application Number:
PCT/JP2001/010844
Publication Date:
June 20, 2002
Filing Date:
December 11, 2001
Export Citation:
Assignee:
NIPPON KOGAKU KK (JP)
INABA NAOTO (JP)
INABA NAOTO (JP)
International Classes:
G01S17/14; G04F10/04; G01C3/06; (IPC1-7): G01S17/10
Foreign References:
| JPH03142397A | 1991-06-18 | |||
| JP2001124855A | 2001-05-11 | |||
| EP0875772A2 | 1998-11-04 | |||
| JPH09127240A | 1997-05-16 |
Attorney, Agent or Firm:
Hosoe, Toshiaki (Nishikanagawa 1-Chome Kanagawa-ku Yokohama-Shi, Kanagawa, JP)
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