Optical radar ranger with modulation of image sensor sensitivity

Details Optical radar ranger with modulation of image sensor sensitivity Optical radar ranger with modulation of image sensor sensitivity

1994-12-15

1996-11-26

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 515, G01C 300

Patent

active

055791034

ABSTRACT:
According to the present invention, there is provided an optical radar in which a beam intensity-changed with a preset waveform and having a two-dimensional spread is irradiated on a target measurement object, an optical image of light reflected by the target measurement object is formed on the light-receiving surface of an image pickup element having a sensitivity modulation function and is photoelectrically converted, the sensitivity of the image pickup element is modulated with the preset waveform using the sensitivity modulation function of the image pickup element, distances to respective points of the target measurement object are obtained from light amount signals from the respective points of the target measurement object, which signals are output from the image pickup element, thereby measuring the shape of the target measurement object, wherein distances to the respective points of the target measurement object are obtained from the plurality of light amount values of the respective points of the target measurement object, which light amount values are obtained by shifting the difference between the phase of the intensity change in the beam and the sensitivity modulation phase of the image pickup element a plurality of times.

REFERENCES:
patent: 4915498 (1990-04-01), Malek
patent: 4935616 (1990-06-01), Scott
patent: 4957362 (1992-09-01), Peterson
patent: 5164733 (1992-11-01), Nettleton et al.
C. B. Johnson, C. E. Catchpole and C. C. Matle, IEEE Trans., ED-18, 11, p. 1113, (1971).
D. L. Emberson, Adv. In E. and E. Phys., 33A, p. 133, (1972), Academic Press, London and New York.

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