Laser light receiving device with improved noise discrimination

Details Laser light receiving device with improved noise discrimination Laser light receiving device with improved noise discrimination

1993-06-10

1995-11-21

Boudreau, Leo H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359184, 359186, H04B 1004

Patent

active

054692873

ABSTRACT:
For accurately detecting a desired laser signal without being affected by ambient noise light pulse, a laser signal receiving apparatus, which receives a light pulse transmitted from a laser transmitter, includes a light receiving section having a photo-electric converter for converting a light pulse into an electric pulse signal, a pulse-width detecting section for detecting a pulse-width of the pulse signal derived from the light receiving section and a controlling section having a counter port supplied with the pulse signal and a pulse-width detector port supplied with an output of the pulse-width detecting section, so as to count only the pulse signal having a predetermined pulse-width, based on an output of the pulse-width detecting section.

REFERENCES:
patent: 3867628 (1975-02-01), Brown
patent: 4241455 (1980-12-01), Eibner
patent: 4497068 (1985-01-01), Fischer
patent: 4505582 (1985-03-01), Zuleeg et al.
patent: 4601064 (1986-07-01), Shipley
patent: 4713841 (1987-12-01), Porter et al.
patent: 5142142 (1992-08-01), Senechalle et al.
patent: 5260563 (1993-11-01), Hunter et al.
patent: 5282223 (1994-01-01), Muramatsu
"LSD3-High Speed Laser Light Pulse Detector", Copyright Oct. 1982, Rev. 590, pp. 1-10.

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