Optical device using a matched interferometric analyzer and filt

Details Optical device using a matched interferometric analyzer and filt Optical device using a matched interferometric analyzer and filt

1988-01-12

1990-04-10

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356 4, 356 45, 356 5, G01P 336, G01C 308

Patent

active

049154990

ABSTRACT:
The device according to the invention comprises a wide spectrum lighting source (60), a first interferometer (FP1) serving as a filter, a second interferometer (FP2) with the same characteristics as the first and a photodetector (66). The identity of the characteristics of the two interferometers makes it possible to work with higher lighting power levels than in the prior art. The two interferometers are advantageously constituted by a single apparatus used twice.
Application to the measurement of the position, displacement or speed of a surface, particularly in detonics.

REFERENCES:
patent: 3788743 (1974-01-01), George
patent: 3802775 (1974-04-01), Hughes
patent: 3940608 (1976-02-01), Kissinger
patent: 3942890 (1976-03-01), Malone
patent: 4476875 (1984-10-01), Nilsson et al.
patent: 4766323 (1988-08-01), Franklin et al.
Applied Optics, May 25, 1986, No. 9.

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