Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1974-04-08
1976-03-02
Wilbur, Maynard R.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
250203R, 350198, 356 5, 343 73, G01C 308, G02B 1306
Patent
active
039414833
ABSTRACT:
Apparatus including discrimination circuitry for reliably identifying a target illuminated by a pulsed laser beam is disclosed. Laser energy received from objects within a field of view is imaged on one or more elements of an optical detector which produces electrical signals indicative of the direction of arrival of the laser energy. Signals from the detector are selectively passed to a display device by means of self-adaptive gating circuitry which blocks signals occuring during intervals when valid signals are not expected. Means for discriminating as to optical frequency, and for utilizing only the last returned reflection of each transmitted laser pulse is also disclosed for further increasing reliability.
REFERENCES:
patent: 3059519 (1962-10-01), Stanton
patent: 3205303 (1965-09-01), Bradley
patent: 3402630 (1968-09-01), Blau et al.
patent: 3723005 (1973-03-01), Smith et al.
patent: 3743419 (1973-07-01), Skagerlund
patent: 3752581 (1973-08-01), Everest et al.
patent: 3802780 (1974-04-01), Helm et al.
Buczinski S. C.
Honeywell Inc.
Wilbur Maynard R.
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