Transmitter-receiver system

Details Transmitter-receiver system Transmitter-receiver system

1974-08-20

1976-04-20

Tubbesing, T. H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250552, 307246, 356 4, G01C 308, H03K 1756

Patent

active

039515494

ABSTRACT:
An optical transmitter-receiver system is provided which is particularly adapted for use in vehicle guidance, obstacle detection and the like. The system includes a laser diode transmitter including a modulation circuit comprising a bank of transistors that are individually triggered into the alvalanche mode so that energy stored by a capacitive storage network is discharged into the diode. In accordance with a first receiver embodiment, which includes a range flip-flop controlled by a threshold comparator, an analog voltage proportional to range is produced. In a second receiver embodiment, the receiver responds to targets within a prescribed zone determined by an analog gated amplifier.

REFERENCES:
patent: 3545861 (1970-12-01), Farnsworth et al.
patent: 3606537 (1971-09-01), Yurasek et al.
patent: 3648073 (1972-03-01), Sams et al.
patent: 3650628 (1972-03-01), Tawfik et al.
patent: 3661459 (1972-05-01), Aoki
patent: 3666367 (1972-05-01), Farnsworth et al.
patent: 3743419 (1973-07-01), Skagerlund
patent: 3853402 (1974-12-01), Nichols

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