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

1985-07-31

1988-04-19

Willis, Davis L.

Optics: measuring and testing

For optical fiber or waveguide inspection

324510, G01N 2188

Patent

active

047385294

ABSTRACT:
An apparatus for measuring the transit time of electromagnetic waves has a pulse generator (11) which is arranged in a feedback loop (12) and which can be triggered by pulses. Either the measurement path (13) or a reference path (14) with a reference receiver (16) at the end of it can be selectively included in the feedback loop (12). The pulse generator is also connected to a computing/counting stage (19) which counts the pulse transmitted during the measurement and reference periods separately and computes the transit time therefrom (FIG. 1).

REFERENCES:
patent: 3900261 (1975-08-01), Wingate
patent: 4234256 (1980-11-01), Higginbotham et al.

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