The Study Of True Color Stereoscopic Holograms

Two methods of making a true color stereoscopic hologram are presented in this paper. Two parallactic films of a nature color scene are obtained with a three color grating camera. With the films, a true color stereoscopic hologram can be made with one–wavelength laser through two exposure recordings. A true color stereoscopic scene image can be reconstructed from the hologram as it is illuminated by a white light source. Compared with other methods, this method is simpler in operation. It largely decreases the scattering noise and gets rid of chromatic aberration of the reconstructed image. It can produce a clearer and brighter achromatic aberration stereoscopic color image. Other kind of method of making a true color stereoscopic hologram with LCD liquid crystal screen is presented in this paper. Making use of the image processing software the color image producing by digital camera or computer will be divided into red,green and blue three colors images and input to the LCD liquid crystal screen to be used as the masks. This method resolves the two problems. One is the contraposition of three dividing colors films in traditional method and the other is tedious procedure to creating dividing colors films. In addition to describe the principles of these two methods. We have fabricated some true color stereoscopic holograms in the lab in order to validate the feasibility of the method. Qualified true color stereoscopic holograms are obtained.