Optics: measuring and testing – Range or remote distance finding – With photodetection
Reexamination Certificate
2005-03-08
2005-03-08
Buczinski, Stephen C. (Department: 3662)
Optics: measuring and testing
Range or remote distance finding
With photodetection
C356S005010
Reexamination Certificate
active
06864966
ABSTRACT:
The invention relates to a method for measuring distances, based on the phase measurement of an optical measuring beam that is reflected or scattered by an object, on which the beam is sighted. According to said method, the measurement object is exposed to an optical measuring beam of modulated intensity emitted by a measuring device and is converted into electrical measurement signals. The signals are then compared with a reference signal that is generated from the detection and conversion of a portion of measuring light that has been guided on a known reference trajectory, in order to determine the distance between the measuring device and the measurement objet, based on the phase difference that has been determined. The emitted measuring beam is modulated in bursts and the measurement signal of the receiver is only evaluated during the active burst period. The invention also relates to devices for carrying out said method.
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patent: 3619058 (1971-11-01), Hewlett et al.
patent: 3652161 (1972-03-01), Ross
patent: 5745437 (1998-04-01), Wachter et al.
patent: 5889490 (1999-03-01), Wachter et al.
patent: 19643287 (1998-04-01), None
patent: 0738899 (1996-10-01), None
patent: 1012627 (2000-06-01), None
Buczinski Stephen C.
Leica Geosystems AG
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