Apparatus for measuring the transit time of electromagnetic wave

Details Apparatus for measuring the transit time of electromagnetic wave Apparatus for measuring the transit time of electromagnetic wave

1994-02-10

1996-06-25

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

342135, G01C 308, G01S 1308

Patent

active

055305393

ABSTRACT:
An apparatus for measuring the transit time of electromagnetic waves operates with pulse frequencies (9, 10), conducted in a feedback loop (12) which are supplied after passing through a measurement path (13) or through a reference path (14) to a resonator (35). As a result of an 180.degree. phase-shift of the last pulse (10) of each pulse sequence (9, 10) the resonator oscillation collapses abruptly at a specific point in time. The directly preceding zero passage of the resonator oscillation defines the time of reception of the pulse sequence.

REFERENCES:
patent: 3503680 (1970-03-01), Schenkerman
patent: 3545861 (1970-12-01), Farnsworth et al.
patent: 3666367 (1972-05-01), Farnsworth et al.
patent: 4153366 (1979-05-01), Mamon et al.
patent: 4770526 (1988-09-01), Manhart et al.
patent: 4895440 (1990-01-01), Cain et al.
patent: 5102219 (1992-04-01), Skagerlund

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