A minimum dispersion stereoscopic rear-projection technology

Abstract

The display is now a most important interface of information interchange, from early black-and-white CRT display to nowadays high-quality colored FPD, when making a leap forward for one stage each time, the stereoscopic image play a more competent role in our life. At the same time, the 3D display has improved the display mode of 2D image and offered stronger ability to reproduce the true image. For the needs of large size, light and thin, and high-quality in the modern display technology, undoubtedly the 3D image transmitting the new-type attitude of information, and also build the more high-level perspective for the display technology in the future. 3D technology has been already extensively applied in many fields like military, medical science, education, and exhibition. The quality demand for the 3D image differs widely in different ranges of application. One design method of the 3-D stereoscopic display system is based on polarization separation of the binocular parallax images. Usually two orthogonal linearly polarized lights are used in such a system, however it suffers from cross-talk between the binocular parallax images in case of tilting the viewer’s polarization glasses. In this paper, we introduce a stereoscopic rear projection display system based on circularly polarized lights to circumvent the drawback of the conventional system. Furthermore, we use a broadband retarder, which is designed by a direct binary search (DBS) algorithm, to provide chromatically non-dispersive stereoscopic images. This method can be designed for high performance stereoscopic requirements such as in those systems for medical application.