Giorgio B. Trapani

Three-Dimensional Projection With Circular Polarizers

Linearly polarized light has been used extensively as a means of encoding and decoding projected, superimposed stereoscopic images. An inherent property of such linear polarizer systems is that the observer wearing 3-D viewers must keep his head erect in order to maintain proper polarizer orientation and avoid troublesome ghost images. Circularly polarized light provides efficient extinction over a wide range of angular rotation, thus providing the opportunity to view 3-D comfortably with great freedom of head motion and position.

9.1: Intrinsic Polarizers — Ultra Durable Dichroic Polarizers for LCD Projection

High temperature polysilicon (HTPS) projection engines provide a challenging environment for film-based optical components, especially the absorbing polarizers that are critical for image formation. Intrinsic polarizers do not contain unstable dichromophores and have been shown to be well suited for this application.

High Efficiency Polarizers For The Visible Region

The properties of a newly-developed high efficiency dichroic polarizer, Polaroid HN42HE, are described and compared to those of existing commercial polarizers. The new polarizer has good neutrality, very high extinction and high transmittance, a combination of attributes previously unavailable in dichroic polarizers. The use of high efficiency polarizers in flashblindness goggles and other applications is discussed.

Color Contrast In Polarizer/Retarder Optical Systems

Trains of polarizers and retarder elements can be devised to produce nearly any desired color. This paper is concerned with the values of retardation which will produce the largest color contrast between the two positions of parallel and crossed polarizers. The specific systems investigated consist of the case of a retarder between two polarizers and the case of three polarizers and two retarders.