Elimination of conjugate image for horizontally scanning holography : Elimination of undesirable light

Abstract

We have proposed the holographic display technique to enlarge the image size and the viewing zone angle of a hologram. A high-speed spatial light modulator (SLM) is used to display a vertically long image by an anamorphic imaging system, and this image is scanned horizontally by a galvano scanner. In this study, the undesirable light, such as conjugate image, zero-th order light, and higher-order diffraction images, is eliminated. The single-sideband method is introduced. A vertical slit and a horizontal split are placed on the vertical and horizontal Fourier planes, respectively. We experimentally demonstrated the generation of hologram images without the undesirable light.