Light diffraction device using reconfigurable spatial light modu

Details Light diffraction device using reconfigurable spatial light modu Light diffraction device using reconfigurable spatial light modu

1995-11-17

1997-04-01

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Particular structure

Lens or prism separate from projection system

359569, 359 9, 359 73, 349100, 349117, 349193, G02F 11335, G02F 1141, G03H 102

Patent

active

056172273

ABSTRACT:
Light diffraction device using reconfigurable spatial light modulators and the fractional Talbot effect. This device comprises two liquid crystal, electrically addressable spatial light modulators (M1, M2) on a semiconductor substrate and at least one polarizing beam splitter (2), the optical path between the modulators being equal to (2k+1) Z.sub.T /4.sup.n in which k and n are natural integers, n differing from zero, and Z.sub.T is the Talbot distance relative to a biperiodic hologram obtained by means of one of the modulators and at one of the periods equal to double the other, which makes it possible to obtain a reconfigurable hologram having four phase levels. Application to optical telecommunications.

REFERENCES:
patent: 5373393 (1994-12-01), DeJule et al.
patent: 5469279 (1995-11-01), Sharp et al.
patent: 5552916 (1996-09-01), O'Callaghan et al.
Optics Letters, vol. 19, No. 20, Oct. 1994, Washington, US, pp. 1654-1656, H. Hamam et al., "Fractional Talbot Four-Level Phase-Only Holograms Using Ferroelectric Liquid-Crystal Spatial Light Modulators".
Optics Communications, vol. 109, No. 3/4, Jul. 1994, Amsterdam, NL, pp. 222-226, T. D. Wilkinson et al., "Dynamic Asymmetric Binary Holograms Using A Ferroelectric Liquid Crystal Spatial Light Modulator".
Electronics Letters, vol. 29, No. 18, Sep. 1993, Enage GB, pp. 1661-1663, S. E. Broomfield et al., "Four-Level, Phase Only, Spatial Light Modulator".
Applied Optics, vol. 33, No. 14, May 1994, New York, US, pp. 2795-2803, D. C. O'Brien et al., "Dynamic Holographic Interconnets That Use Ferroelectric Liquid-Crystal Spatial Light Modulators".
Applied Optics, vol. 31, No. 20, Jul. 1992, New York, US, pp. 3917-3929, Mark O. Freeman et al., "Quantized Complex Ferroelectric Liquid Crystal Spatial Light Modulators".
Inst. Phys. Conf. Ser. No. 139: Part II, Opt. Comput. Int. Conf. Edinburgh, Aug. 1994, (B.S. Wherret, ED.), 1995, Bristol, GB, pp. 187-190, D. C. O'Brien et al., "A Compact Hologrpahically Routed Optical Crossbar Using A Ferroelectric Liquid-Crystal Over Silicon Spatial Light Modulator".
Optik, vol. 79, No. 1, 1988, Stuttgart DE, pp. 41-45, Adolf W. Lohmann, "An Array Illuminator Based On The Talbot-Effect".
Proc. Conf. On Optical Computing, Edinburgh, 1994, D. C. O'Brien and D. J. Douglas, "A Compact Holographically Routed Optical Crossbar Using A Ferroelectric Liquid-Crystal Over Silicon Spatial Light Modulator".
Applied Optics, vol. 33, No. 14, May 1994, pp. 2775-2784, D. J. Douglas et al., "256 x 256 Liquid-Crystal-On-Silicon Spatial Light Modulator".
Applied Optics, vol. 32, No. 28, Oct. 1993, pp. 5549-5556, A. O'Hara et al., "Mirror Quality And Efficiency Improvements Of Reflective Spatial Light modulators By The Use Of Dielectric Coatings And Chemical-Mechanical Polishing".
Applied Optics, vol. 26, No. 14, 1987, pp. 2788-2798, M. A. Seldowitz et al., "Synthesis Of Digital Holograms By Direct Binary Search".
Opt. Eng., vol. 28, No. 11, 1989, pp. 1162-1167, J. Turunen et al., "Kinoform Phase Relief Synthesis: A Stochastic Method".

Affiliated with

Also associated with

Rating

Light diffraction device using reconfigurable spatial light modu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light diffraction device using reconfigurable spatial light modu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light diffraction device using reconfigurable spatial light modu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-543802