Optics: measuring and testing – By polarized light examination – With birefringent element
Patent
1995-03-07
1996-02-06
Turner, Samuel A.
Optics: measuring and testing
By polarized light examination
With birefringent element
356345, 356358, 356 409, G01B 902
Patent
active
054899842
ABSTRACT:
An optical correlator is disclosed that, in combination with an ultrafast optical pulsed source, can be used for estimating the differential position of remote objects with submicron precision, as opposed to measuring the absolute distance. The system includes an ultrafast pulsed laser source feeding into an amplitude-division device, with each amplitude component leading to an entity for launching pulsed radiation at the target, along with an entity for collecting the radiation scattered or reflected off the surface of the object, a nonlinear device for time-gating the collected signal with the amplitude-divided source, and a detection device for observing the time-gated signal. The device has remarkable spatial resolution and sensitivity. Applications of the technique to the measurement of torque, angular deformation, and two- and three-dimensional surface profilometry are presented.
REFERENCES:
patent: 3669541 (1972-06-01), Duguay
patent: 4097148 (1978-06-01), Fry
patent: 4606639 (1986-08-01), Mottier et al.
patent: 4619529 (1986-10-01), Iuchi et al.
patent: 4708481 (1987-11-01), Mori et al.
patent: 4729653 (1988-03-01), Kobayashi
patent: 4767197 (1988-08-01), Yeh
patent: 4767210 (1988-08-01), Kashyap
patent: 4792230 (1988-12-01), Naganuma et al.
patent: 4830486 (1989-05-01), Goodwin
patent: 4886363 (1989-12-01), Jungquist
patent: 4973160 (1990-11-01), Takiguchi et al.
patent: 4978219 (1990-12-01), Bessho
patent: 5037206 (1991-08-01), Etzkorn et al.
patent: 5166751 (1992-11-01), Massig
patent: 5170217 (1992-12-01), Nishimoto et al.
patent: 5189489 (1993-02-01), Brunfeld
patent: 5299170 (1994-03-01), Shibata et al.
patent: 5359410 (1994-10-01), Diels et al.
"Femtosecond Transillumination Optical Coherence Tomography", Hee et al., Optics Letters, vol. 18, No. 12, Jun. 15, 1993, pp. 950-952.
"Imaging with Femtosecond Pulses", Yan et al., Applied Optics, vol. 31, No. 32, Nov. 10, 1992, pp. 6869-6873.
"Ultrashort Light Pulses, Picosecond Techniques and Applications", Ippen, E. P. and Shank, C. V., Springer-Verlag, Berlin, Heidelberg New York, 1977.
"Intense Light Bursts In the Stimulated Raman Effect", Maier et al., Physical Review Letters, vol. 17, No. 26, Dec. 26, 1966, pp. 1275-1277.
"Dynamic Spectroscopy and Subpicosecond Pulse Compression", Ippen et al., Applied Physics Letters, vol. 27, No. 9, Nov. 1975, pp. 488-490.
Applied Physcis Letters, vol. 10, Jan. 1, 1967, "Measurement of Picosecond Laser Pulse Widths", J. A. Armstrong, pp. 16-19.
IEEE Journal of Quantum Electronics, vol. QE-16, No. 9, Sep. 1980, "CW Autocorrelation Measurements of Picosecond Laser Pulses", Kenneth L. Sala et al, pp. 990-996.
Optics Letters, vol. 6, No. 9, Sep. 1981, "Subpicosecond-Time Domain Reflectometry", Joel J. Fontaine et al, pp. 405-407.
Optics Letters, vol. 18, No. 7, Apr. 1, 1993, "400-Hz Mechanical Scanning Optical Delay Line" K. F. Kwong, et al, pp. 558-560.
Optics Letters, vol. 16, No. 13, Jul. 1, 1991, "Imaging Objects Hidden in Highly Scattering Media Using Femtosecond Second-Harmonic-Generation Cross-Correlation Time Gating", K. M. Yoo et al, pp. 1019-1021.
Optics Letters, vol. 18, No. 21, Nov. 1, 1993, "In Vivo Retinal Imaging by Optical Coherence Tomography", E. A. Swanson et al., pp. 1864-1866.
Journal of Applied Physics, vol. 62, No. 5, Sep. 1, 1987, "Optical, Mechanica, and Thermal Properties of Barium Borate", D. Eimerl et al, pp. 1968-1983.
Revue Phys. Appl., 22 Dec. 1987, pp. 1605-1611, J. C. Diels, et al, "Ultrafast Diagnostics" Optics and Lasers in Engineering 4 (1983) pp. 145-165 J. C. Diels et al, "Imaging With Short Optical Pulses".
Applied Optics, vol. 24, No. 9, 1 May 1985, "Control and Measurement of Ultrashort Pulse Shapes (In Amplitude and Phase) with Femtosecond Accuracy", J. C. Diels, et al., pp. 1270-1282.
"Measurement of Ultrashort Optical Pulses with .beta.-BaB.sub.2 O.sub.4 ", publ. 7 Dec. 1987, K. L. Cheng et al.
Optics Letters, vol. 11, No. 3, Mar. 1986, "Femtosecond Optical Ranging in Biological Systems" J. G. Fujimoto, et al., pp. 150-152.
Hariharan Anand
Harter Donald J.
Imra America Inc.
Kim Robert
Turner Richard C.
Turner Samuel A.
LandOfFree
Differential ranging measurement system and method utilizing ult does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Differential ranging measurement system and method utilizing ult, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential ranging measurement system and method utilizing ult will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2178430