Interferometer with two phase-conjugate mirrors

Details Interferometer with two phase-conjugate mirrors Interferometer with two phase-conjugate mirrors

1990-12-21

1992-06-09

Turner, Samuel A.

Optics: measuring and testing

By polarized light examination

With birefringent element

356345, 356358, G01B 902

Patent

active

051201330

ABSTRACT:
In an interferometer apparatus used for monitoring an object surface, the apparatus having a source of coherent light, a beam splitter for dividing the coherent light into a reference beam and an object beam, another beam splitter for dividing the object beam into two separate portions, and a light detector for detecting light interference, comprising an externally-pumped phase-conjugate mirror working in conjunction with a self-pumped phase-conjugate mirror. The externally-pumped phase-conjugate mirror receives the reference beam, receives one portion of the object beam, and reflects the received portion of the object beam to the detector as a first phase-conjugate beam. The self-pumped phase-conjugate mirror receives a second portion of the object beam and reflects the received portion of the object beam to the detector as a second phase-conjugate beam. The first and second phase-conjugate beams interfere at the detector, and the interference produced thereby is representative of changes in longitudinal distance between the object surface irrespective of roughness and the phase-conjugate mirrors.

REFERENCES:
patent: 4280764 (1981-07-01), Sica, Jr. et al.
patent: 4442455 (1984-04-01), Huignard et al.
patent: 4575245 (1986-03-01), Borde
patent: 4739496 (1988-04-01), Marom et al.
patent: 4979828 (1990-12-01), Cronin-Golomb et al.
J. P. Huignard et al., "Real-time double-exposure interferometry with Bi..12 SiO.sub.20 crystals in transverse electrooptic configuration", Appl. Opt. 1807-1809 (1977).
T. Sato et al., "Dynamic interferometric observation of differential movement", Appl. Opt. 3895-3897 (1983).
I. Bar-Joseph et al., "Low-power phase-conjugate interferometry", J. Opt. Soc. Am. 6, 414-416(1981).
J. Feinberg, "Interferometer with a self-pumped phase-conjugating mirror", Opt. Lett. 8, 569-571 (1983).
P. Yeh et al., "Doppler-free phase-conjugate reflection", Opt. Lett. 41-43 (1984).
J. Feinberg, "Continuous-wave self-pumped phase conjugator with wide field of view", Opt. Lett. 8, 480-482 (1983).

Affiliated with

Also associated with

Rating

Interferometer with two phase-conjugate mirrors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interferometer with two phase-conjugate mirrors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interferometer with two phase-conjugate mirrors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1800311