Efficiency of polarization optics in viewing stereoscopic images

Vivian K. Walworth; Louis Cincotta; Julius J. Scarpetti

doi:10.1117/12.430823

22 June 2001 Efficiency of polarization optics in viewing stereoscopic images

Vivian K. Walworth, Louis Cincotta, Julius J. Scarpetti

Proceedings Volume 4297, Stereoscopic Displays and Virtual Reality Systems VIII; (2001) https://doi.org/10.1117/12.430823
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

In recent years we have noted considerable disparity in ghosting among stereoscopic images encoded by polarization and projected onto silver screens. Potential causes include inefficiency of the polarizers used in projection, errors in orientation of linear polarizers placed over paired projection lenses, misalignment of linear polarizers in 3-D viewers; and leakage of non-polarized light through each of the polarizers. With polarizing images, the efficiency of the dyes that form the polarizing images must be considered. In addition, ghosting may arise from depolarization by poor screen surfaces or by some projection equipment. Spectrophotometric measurements confirmed visual differences in blue leakage of crossed polarizing lenses from various suppliers. We also found significant differences in transmittance curves of individual polarizers. We also examined efficiencies of dye polarizers crossed with polarizers used in 3-D viewers, simulating images formed of polarizing dyes in the StereoJet process. Although antighosting measures described earlier help mitigate unwanted imagewise ghosting here, it is important to minimize all potential for the appearance of ghosts. In addition, we reviewed the relative efficiencies of linear polarizers and circular polarizers for encoding polarization of stereoscopic images. Here we compared the transmittance of the crossed pairs as functions of both wavelength and angular disparity.

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Vivian K. Walworth, Louis Cincotta, and Julius J. Scarpetti "Efficiency of polarization optics in viewing stereoscopic images", Proc. SPIE 4297, Stereoscopic Displays and Virtual Reality Systems VIII, (22 June 2001); https://doi.org/10.1117/12.430823

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KEYWORDS

Polarizers

Transmittance

3D vision

Polarization

Image filtering

Lenses

Linear polarizers

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