Optical distance meter and light source device used for the same

Details Optical distance meter and light source device used for the same Optical distance meter and light source device used for the same

1993-12-21

1996-07-02

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 401, 356 51, 372 9, 372 21, 250553, 359599, 385122, G01C 308, H01S 310, H01L 3114

Patent

active

055328130

ABSTRACT:
In a light-wave distance meter, a light source device emits reference modulated light beams from multiple spatially-separated light emitting areas, an optical means radiates a light beam derived from the multiple modulated light beams to the target of measurement, a light beam reception means receives the reflected return light beam from the target and converts it into an electrical pulse signal, and a distance measuring means calculates the distance to the target based on the time difference between the light beam emission and the return light beam reception. The low coherence and high intensity light beam produced by the light source device enables the extension of the maximum measurable distance.

REFERENCES:
patent: 3751166 (1973-08-01), Starkey et al.
patent: 3902803 (1975-09-01), Lego
patent: 5091744 (1992-02-01), Omata
patent: 5210586 (1993-05-01), Grage et al.
patent: 5335070 (1994-08-01), Pfiibsen et al.

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