Light loss reduction of LCD polarized stereoscopic projection

Victor A. Elkhov; Yuri N. Ovechkis

doi:10.1117/12.474140

30 May 2003 Light loss reduction of LCD polarized stereoscopic projection

Victor A. Elkhov, Yuri N. Ovechkis

Proceedings Volume 5006, Stereoscopic Displays and Virtual Reality Systems X; (2003) https://doi.org/10.1117/12.474140
Event: Electronic Imaging 2003, 2003, Santa Clara, CA, United States

Abstract

The overwhelming majority of LCD projectors that are used for polarized stereoscopic projection have linear polarized output with two colors in one direction and the third color in an orthogonal direction (e.g. green is horizontal and red and blue are vertical). During standard conversion of two projectors light to orthogonal or circular clockwise and counter-clockwise polarization more than fifty percent of light energy is lost. This paper considers a method of polarized stereoscopic projection that gives less light loss. For this purpose the light of each LCD projector is converted to circular polarization by using quarter wave retarder plates. Orientation of its optical axes are chosen so that green light from the first projector and red and blue light from the second projector are circularly polarized in the clockwise direction. The remaining colors are circular polarized in the counter-clockwise polarization. Simultaneously color transformation of stereo pairs pictures is realized. Green component of first picture is mixed with red and blue component of second picture and vice versa. This method enables the observation of good quality stereoscopic images using glasses with circular polarizers. In the case of glasses with linear polarization, half wave plates for conversion of LCD projectors light are used.

Citation Download Citation

Victor A. Elkhov and Yuri N. Ovechkis "Light loss reduction of LCD polarized stereoscopic projection", Proc. SPIE 5006, Stereoscopic Displays and Virtual Reality Systems X, (30 May 2003); https://doi.org/10.1117/12.474140

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