Method and device for recording a three-dimensional...

Details Method and device for recording a three-dimensional... Method and device for recording a three-dimensional...

2007-05-01

2007-05-01

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S005020, C356S005030

Reexamination Certificate

active

10485996

ABSTRACT:
The invention relates to methods and devices for recording three-dimensional distance-measuring images of an object surface by measuring light propagation time using a short-term integrated photodetector. For starting a light-induced pulse on the transmission side, a trigger signal is produced that is at the same time used on the receiving side for opening at least one integration window for receiving back-scattered light-induced pulses with a predetermined time delay. A predetermined event such as a maximum or a zero crossing is detected which, by its interval relative to the integration windows, determines a trigger delay. The trigger delay is correlated with the light propagation time and allows calculation of the object point distance d.

REFERENCES:
patent: 4915498 (1990-04-01), Malek
patent: 4928152 (1990-05-01), Gerardin
patent: 5148175 (1992-09-01), Woolfolk
patent: 5291262 (1994-03-01), Dunne
patent: 5625446 (1997-04-01), Bedard
patent: 6057909 (2000-05-01), Yahav et al.
patent: WO99/34235 (1998-11-01), None

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