<title>Electro-holographic display using 15mega pixels LCD</title>

Abstract

We have been researching holographic 3D displays using a commercially available Liquid Crystal Devices (LCD). However, specifications of the LCD were not enough to holographic display, and we could obtain only small reconstructed image with the narrow viewing zone. In our present research, we are supported by an LCD manufacturer, and planning to use the custom-made LCD which has both minute and numerous pixels. The LCD's pixel pitch is 28 micrometers (horizontal) X 56 micrometers (vertical), and pixel number is 3200 X 960. Five LCDs are horizontally arranged in our electro-holographic display. By using five LCDs, total pixel number becomes about 15 Mega. We can obtain larger image and wider viewing zone compared with our previous experimental display, and can be observed binocularly. The size of the reconstructed image is 50 mm wide, 150 mm high, and 50 mm deep. Viewing zone is 65 mm at approximately 1000 mm from the image. In this display, we discard the vertical parallax and set the 1D diffuser on the vertical image plane. We also discuss the compensation of optical aberrations. Even if a single lens with large aberration is used for the optics system of the reproduction, we can obtain the reproduction image with corrected aberration by adding the compensation phase distribution to the hologram.