Abstract. We report a calculation reduction method for color computer-generated holograms (CGHs) using color space conversion. Color CGHs are generally calculated on RGB space. In this paper, we calculate color CGHs in other color spaces: for example, YCbCr color space. In YCbCr color space, a RGB image is converted to the luminance component (Y), blue-difference chroma (Cb) and red-difference ...

For evaluating the surface of parabolic mirror (90 mm, F/0.76), two different null test have been discussed. After designing, encoding, and fabricating the CGH(computer generated hologram), the null CGH test was performed. An autocollimation test with a flat mirror was also performed and these testing result were compared

This document is an introduction to the design and fabrication of computer generated hologram (CGH) as I understood them back in 1997. At that time, I was visiting Professor Toyohiko Yatagai1 in Japan. I also included in this document a short description of the application ‘DoCGH’ that I wrote to generate simple hologram. This work was supported by a grant of the Swiss Academy of Engineering Sc...

Abstract Computer-generated holography can obtain the wavefront required for constructing arbitrary intensity distributions in space. Currently, speckle noises remain an issue most computational methods. In addition, there lacks a multiplexing technology by which images from single hologram and light source be switched lens. this work, we first come up with new algorithm to generate holograms p...

The invention of holography by D. Gabor, followed by the works of E. Leith and Upatnieks, made possible to perform nearly arbitrarily wavefront transformations with the aid of optical microstructures fabricated by interference (Gabor, 1948; Leith & Upatnieks, 1962; Denisyuk, 1962; Benton, 1969). The realization by A. Lohmann and co-workers in the mid1960’s that optical holograms can be simulate...