Optical: systems and elements – Optical modulator – Light wave directional modulation
Reexamination Certificate
2005-08-02
2005-08-02
Epps, Georgia (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave directional modulation
C359S304000, C359S641000, C359S298000, C359S260000, C372S020000
Reexamination Certificate
active
06924923
ABSTRACT:
Methods and devices are provided for steering an electromagnetic beam. The device includes a reflective element, a polarizer, a relay focusing element, and a modulation element. The polarizer is configured to transmit light of a specified polarization and to reflect light having other than the specified polarization. The relay focusing element is disposed to provide optical paths for the electromagnetic beam from a first spot position to a second spot position spatially displaced from the first spot position such that the optical paths encounter the reflective element and the polarizer. The modulation element is configured for selectively transforming a polarization of the electromagnetic beam to include a component of the specified polarization at a spatially localized position along the optical paths.
REFERENCES:
patent: 5059008 (1991-10-01), Flood et al.
patent: 5825523 (1998-10-01), Amitai
patent: 6480334 (2002-11-01), Farn
patent: 6624919 (2003-09-01), Lambert
patent: 2001/0038483 (2001-11-01), Lambert
patent: 2003/0030908 (2003-02-01), Cheng et al.
A.F. Fray and D. Jones “Large-angle beam deflector using liquid crystals,” Electron. Lett.: Aug. 1975, pp. 358-359, vol. 15, No. 16.
J.U. White “Very long optical paths in air,” Journal of the Optical Society of America, May 1976, pp. 411-416, vol. 66, No. 5.
A. Sasaki and T. Ishibashi, “Liquid-crystal light deflector,” Electron. Lett.,Mar. 1979, pp. 293-294, vol. 15, No. 10.
W. Goltsos and M. Holtz, “Agile beam steering using binary optics microlens arrays,” Opt. Eng., Nov. 1990, pp. 1392-1397, vol. 11, no. 29.
P. F. McManamon, E. A. Watson, T. A. Dorschner, and L. J. Barnes, “Applications look at the use of liquid crystal writable gratings for steering passive radiation,” Opt. Eng., Nov. 1993, pp. 2657-2664, vol. 32, No. 11.
E. A. Watson and L. J. Barnes, “Optical design considerations for agile beam steering,” SPIE vol. 2120 Laser Beam Propagation and Control (1994), pp. 186-193.
E. A. Watson, P. F. McManamon, L. J. Barnes, and A. J. Carney, “Applications of dynamic gratings to broad spectral band beam steering,” SPIE vol. 2120 Laser Beam Propagation and Control (1994), pp. 178-185.
R. M. Matic, “Blazed phase liquid crystal beam steering,” SPIE vol. 2120 Laser Beam Propagation and Control (1994), pp. 194-205.
B. L. Anderson, S. A. Collins, C. A. Klein, E. A. Beecher and S. B. Brown, “Highly parallel optical true time delay device for phased array antennas,” Proceedings of The Sixth Annual ARPA Symposium on Photonic Systems for Antenna Applications, Monterey CA. (Mar. 7, 1996).
P. F. McManamon, et. al., “Optical Phased Array Technology,” Proceedings of the IEEE, Feb. 1996, pp. 268-298, vol. 84, No. 2.
L. J. Friedman, D. S. Hobbs, S. Lieberman, D. L. Corkum, H. Q. Nguyen, D. P. Resler, R. C. Sharp, and T. A. Dorschner, “Spatially resolved phase imaging of a programmable liquid-crystal grating,” Applied Optics, Nov. 1996, pp. 6236-6240, vol. 35, No. 31.
S. Serati and J. Stockley, “Advanced Liquid Crystal on Silicon Optical Phase Arrays,” 2002 IEEE Aerospace Conference—Paper 5.0301 (2002).
P. F. McManamon and W. Thompson, “PAPA Array of Phased Arrays (PAPA) Laser Systems Architecture,” 2002 IEEE Aerospace Conference—Paper 5.0601 (2002).
E. A. Watson and L. J. Barnes, “Implementing Optical Phased Array Beam Steering with Cascaded Microlens Arrays,” 2002 IEEE Aerospcae Conference—Paper 5.0306 (2002).
J. Stigwall, “Optimization of a Spatial Light Modulator for Beam Steering and Tracking Applications,” Thesis—Department of Physics and Measurement Technology, Linköping University (2002).
J. Stockley and S. Serati, “Cascaded One-dimensional Liquid Crystal OPAs for Beam Steering In Two Dimensions,” 2003 IEEE Aerospace Conference—Paper 5.0701 (2003).
E. J. Haellstig, J. Stigwall, M. Lindgren and L. J. Sjoqvist, “Laser beam steering and tracking using a liquid crystal spatial light modulator,” Proceedings of SPIE vol. 5087Laser Systems Technology(2003).
S. R. Harris, “Numerical optimization of the performance of nematic liquid crystal optical phased arrays,” Proceedings of SPIE vol. 5162Advanced Wavefront Control: Methods, Devices, and Applications(2003).
S. R. Harris, “Polarization effects in nematic liquid crystal optical phased arrays,” Proceedings of SPIE vol. 5213Liquid Crystals VII(2003).
Serati Steve
Stockley Jay
Boulder Nonlinear Systems, Inc.
Dinh Jack
Epps Georgia
LandOfFree
Nonmechanical wavelength-independent beam steerer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nonmechanical wavelength-independent beam steerer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonmechanical wavelength-independent beam steerer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3523543