Sidelooking laser altimeter for a flight simulator

Details Sidelooking laser altimeter for a flight simulator Sidelooking laser altimeter for a flight simulator

1981-02-13

1983-07-05

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 4, 358104, 358109, 434 4, 434 38, G01C 310, G09B 908

Patent

active

043915140

ABSTRACT:
The object of the invention is to provide an improved laser altimeter for a flight simulator which will allow measurement of the height of the simulator probe above the terrain directly below the probe tip.
A laser beam 22 is directed from the probe 13 at an angle .theta. to the horizontal to produce a beam spot 20 on the terrain. The angle .theta. that the laser beam 22 makes with the horizontal is varied so as to bring the beam spot into coincidence with a plumb line 18 coaxial with the longitudinal axis of the probe 13. A television altimeter camera 30 observes the beam spot and has a raster line aligned with the plumb line 18. Spot detector circuit 26 coupled to the output of the TV camera monitors the position of the beam spot relative to the plumb line 18. An error signal is produced by computer 28 driving, via a servo motor 23, the laser beam optics so as to cause the beam spot to come into coincidence with the plumb line 18. At coincidence, computer 28 looks up in a table the altitude of the probe for the given angle .theta. and reads out the altitude to an altimeter readout 31.

REFERENCES:
patent: 3183295 (1965-05-01), Myles
patent: 3194869 (1965-07-01), Eisenberg
patent: 4068955 (1978-01-01), Bodlaj
patent: 4097154 (1978-06-01), Peters et al.
patent: 4183672 (1980-01-01), Raber et al.

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