Duping arrangement for laser distance measuring devices

Details Duping arrangement for laser distance measuring devices Duping arrangement for laser distance measuring devices

1990-07-02

1991-08-20

Lee, John D.

Optical waveguides

Optical fiber bundle

356 5, 385 33, G02B 604

Patent

active

050408690

ABSTRACT:
A duping arrangement is provided for a laser distance measuring device in which the illuminated object sends to the transmitter an identical but time-delayed signal and, therefore, supplies the transmitter with an incorrect distance reading. The duping arrangement comprises a wide-angle optical system formed by a bundle of glass fibers, a fiber delay line and a phase-conjugated optical element that is operated in an externally pumped mode or a self-pumped mode.

REFERENCES:
patent: 3740141 (1973-06-01), DeWitt
patent: 4181431 (1980-01-01), Chaborski
patent: 4553836 (1985-11-01), Meier et al.

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