Single-channel heterodyne distance-measuring method

Details Single-channel heterodyne distance-measuring method Single-channel heterodyne distance-measuring method

2005-12-09

2009-11-24

Tarcza, Thomas H (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S005010, C356S005100, C356S004100

Reexamination Certificate

active

07623222

ABSTRACT:
According to the invention, high precision distance measurement may be carried out by the broadcast of pulsed electromagnetic radiation (ES) with at least two pulse repetition frequencies, whereby the pulse repetition frequencies are selected such that the corresponding pulse separations do not have a common multiple in the range of the order of magnitude of a maximum external measurement range. The radiation is hence transmitted both to a target for measurement over the measurement path outside the device and also over a reference path inside the device, whereby the radiation (IS) passing along the reference path defines at least one start pulse and the radiation (ES) passing along the measurement path defines at least one stop pulse.

REFERENCES:
patent: 5347525 (1994-09-01), Faris
patent: 5428439 (1995-06-01), Parker et al.
patent: 5889490 (1999-03-01), Wachter et al.
patent: 2004/0085526 (2004-05-01), Gogolla et al.
patent: 101 12 833 (2003-03-01), None
patent: 1 450 128 (2004-08-01), None

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