High Efficiency Light-Valve Projectors and High Efficiency Laser Light Sources

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Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 1995, No. 15, pp. 446–458
Abstract: The optical efficiency of a liquid-crystal light-valve projector is determined by the optical design, the method of modulation and the efficiency of the light source. A projector has been built with an efficient modulation technique. It employs unpolarized light by using a diffraction grating formed in the liquid crystal. The diffraction technique uses a Schlieren optical system. The light sources tested have been xenon arcs, metal halide arcs and efficient solid-state lasers. The optical system reduces laser speckle significantly when laser sources are used. All combinations exceeded 3 lumens per watt for white light Experimental results of the combinations will be given. This modulation technique obtains a high contrast ratio with smaller panels than can be achieved with rotation-of-polarization light valve projectors.
Publication Date: 1995-09-01
DOI: 10.5594/M00513
Link: https://doi.org/10.5594/M00513
Author(s): William GlennCommunications Technology Center, Florida Atlantic University Boca Raton, Florida
Carvel HoltonCommunications Technology Center, Florida Atlantic University Boca Raton, Florida
G.J. DixonCREOL, University of Central Florida Orlando, Florida
Phil BosLiquid Crystal Institute, Kent State University Kent, Ohio
Copyright: © 1995 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1 Glenn W.E. , “Real-Time Display Systems, Present and Future,” in Visual Science and Engineering: Models and Applications , Kelly D. H. , ed. ( NY : Marcel Dekker , 1994 ), 387 – 413 . EXTERNAL
2 Yuyama Ichiro , “II Fundamental Requirements for High Definition Television Systems, Large Screen Effects,” NHK Technical Monograph 32 (June 1982 ). EXTERNAL
3 Bos P.J. , “An Optically Active Diffractive Device for a High-Efficiency Light Valve,” Presented at the Society of Information Display Symposium, May 1995 , Orlando, Florida. EXTERNAL
4 Wigley P.G. , “High Power 467nm Passively-Locked Signal-Resonant Sum Frequency Laser,” Conference on Lasers and Electro-optics, May 1995 , Baltimore, Maryland. EXTERNAL
5 Geels R.S. , “Advances in High-Power Visible Laser Diodes,” presented at the SPIE Photonics West, February 1995 , San Jose, California. EXTERNAL

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William Glenn, Carvel Holton, G.J. Dixon, and Phil Bos; High Efficiency Light-Valve Projectors and High Efficiency Laser Light Sources, SMPTE Meetings and Conferences ( September 1995); SMPTE, 1995. Available at https://doi.org/10.5594/M00513

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William Glenn, Carvel Holton, G.J. Dixon, and Phil Bos; High Efficiency Light-Valve Projectors and High Efficiency Laser Light Sources, SMPTE Meetings and Conferences ( September 1995); SMPTE, 1995. Available at https://doi.org/10.5594/M00513

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<span class="citation">William Glenn, Carvel Holton, G.J. Dixon, and Phil Bos; <cite>High Efficiency Light-Valve Projectors and High Efficiency Laser Light Sources</cite>, SMPTE Meetings and Conferences ( September 1995); SMPTE, 1995. Available at <a href="https://doi.org/10.5594/M00513" target="_blank" rel="noopener">https://doi.org/10.5594/M00513</a></span>

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<li>
William Glenn, Carvel Holton, G.J. Dixon, and Phil Bos; <cite id="bib-10-5594-m00513">High Efficiency Light-Valve Projectors and High Efficiency Laser Light Sources</cite>, SMPTE Meetings and Conferences ( September 1995); SMPTE, 1995
<span class="doi">10.5594/M00513</span>
</li>