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Proceedings Paper

Some Aspects Of Application Of A Double Frequency Interferometer For Distance Measurements
Author(s): J J Galiliski; H Z Kowalski; J Sanecki
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Paper Abstract

Field vector of laser light with sufficient approximation can be circumscribed by scalar function of the form: E(r,t) = Er(r,t) + iEi(r,t) (1) If the function (1) satisfies Gabor postulates, its real and imaginary parts makes the pair of Hilbert transformations - than the real part Er(r,t) can be circumscribed with the help of analytic signal of the form: Er(r,t) = A(t)exp[i Wt + i LV(r,t)] (2) In equation (2) the function exp [ig(r,t)] represents informative signal which modulates car-rier wave- laser light - expressed with the function A(t)exp (iWt). Measuring information included in the signal (2) can not be identified in a simple way be-cause of the laser light frequency band lies nearby 1014 Hz frequency. Informative signal detection is realized by photodetectors, which in the frequency band of the light have square -law characteristic and as low-pass filter satisfies dependences:

Paper Details

Date Published: 15 January 1988
PDF: 5 pages
Proc. SPIE 0673, Holography Applications, (15 January 1988); doi: 10.1117/12.939063
Show Author Affiliations
J J Galiliski, Institute of Geodesy and Cartography (Poland)
H Z Kowalski, Institute of Geodesy and Cartography (Poland)
J Sanecki, Institute of Geodesy and Cartography (Poland)

Published in SPIE Proceedings Vol. 0673:
Holography Applications
Jingtang Ke; Ryszard J. Pryputniewicz, Editor(s)

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