Transceiver head for longitudinal doppler speed indicator

Details Transceiver head for longitudinal doppler speed indicator Transceiver head for longitudinal doppler speed indicator

1995-09-22

1997-12-30

Hellner, Mark

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356 28, G01P 336

Patent

active

057036799

ABSTRACT:
Transceiver head for a longitudinal Doppler speed indicator.
Transceiver head for a longitudinal Doppler speed indicator with at least one pair of measuring axes.
It comprises:
a laser (1);
polarization switching means (4) on the path of the laser beam;
polarization separating means (5) on the path of the polarized beam that comes from the switching means;
control means (5) for switching the switching means alternately from one state to another to direct the beam alternately to one measuring axis and then to another depending on its polarization state.

REFERENCES:
patent: 4199226 (1980-04-01), Weber et al.
patent: 4575238 (1986-03-01), Knuhtsen et al.
patent: 4637717 (1987-01-01), Brudnoy
patent: 4669876 (1987-06-01), Dopheide
patent: 5048951 (1991-09-01), Combe et al.
patent: 5587785 (1996-12-01), Kato et al.
"Laser Doppler velocimeter for multicomponent measurements using an electro-optical modulator demonstrated for a two-component optical configuration", Bahnen et al; Rev. Sci. Instrum. 55 (7), Jul. 1984, pp. 1090-1093.
"Wind Velocity Measurement--A single laser-Doppler system measures three-component wind velocity in clear-air conditions"; NASA Tech Briefs, Summer 1976, vol. 1, No. 2, pp. 182-183.

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