Process and apparatus for absolute interferometric measurement o

Details Process and apparatus for absolute interferometric measurement o Process and apparatus for absolute interferometric measurement o

1992-02-21

1994-07-26

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356351, 356352, 356358, G01B 902

Patent

active

053330455

ABSTRACT:
A superluminescent source emits a wide-band light beam, that is frequency modulated by a filter with a pass band centred on a frequency that is made to vary according to a predetermined law so as to frequency modulate the light beam. Means for splitting and recombining beams determine a mutual phase shift between two components of the beam that depends on the physical magnitude to be measured and is detected by a detector as an indication of the value of the magnitude itself.

REFERENCES:
patent: 4886363 (1989-12-01), Jungquist
patent: 4890922 (1990-01-01), Wilson
patent: 4972077 (1990-11-01), Willson et al.
"Monomode Optical Fiber Interferometers", Jackson, Journal of Physics E. Scientific Instruments, 1985, pp. 985-987.

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