Light wave distance measuring apparatus

Details Light wave distance measuring apparatus Light wave distance measuring apparatus

1993-05-19

1995-03-21

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

342127, G01C 308, G01S 1308

Patent

active

054001307

ABSTRACT:
A light wave distance measuring apparatus structured such that frequency dividing circuits create a base intermediate frequency outputted to a phase measuring circuit and a PLL reference frequency which is a multiple of an integer a (a.gtoreq.2) of the base intermediate frequency, and this PLL reference frequency is outputted to a PLL oscillation circuit, thereby preventing an error in the measurement of distance due to spurious components caused when measuring a phase in the light wave distance measurement.

REFERENCES:
patent: 4146328 (1979-03-01), Hullein et al.
patent: 4453825 (1984-06-01), Buck et al.
patent: 5082364 (1992-01-01), Russell
patent: 5162862 (1992-11-01), Bartram et al.
patent: 5210587 (1993-05-01), Ohmamyuda et al.

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