High Resolution Computer-Generated Rainbow Hologram

• Main Authors: Takeshi Yamaguchi, Hiroshi Yoshikawa
• Format: Article
• Language: English
• Published: MDPI AG 2018-10-01
• Series: Applied Sciences
• Subjects: holography; computer-generated hologram; rainbow hologram; high resolution; fringe printer; wide viewing angle
• Online Access: http://www.mdpi.com/2076-3417/8/10/1955

We have developed an output device for a computer-generated hologram (CGH) named a fringe printer, which can output a 0.35- μ m plane-type hologram. We also proposed several CGH with a fringe printer. A computer-generated rainbow hologram (CGRH), which can reconstruct a full color 3D image, is one of our proposed CGH. The resolution of CGRH becomes huge (over 50 Gpixels) due to improvement of the fringe printer. In the calculation, it is difficult to calculate the whole fringe pattern of CGRH at the same time by a general PC. Furthermore, since the fine pixel pitch provides a wide viewing angle in CGRH, object data, which are used in fringe calculation, should be created from many viewpoints to provide a proper hidden surface removal process. The fringe pattern of CGRH is calculated in each horizontal block. Therefore, the object data from several view points should be organized for efficient computation. This paper describes the calculation algorithm for huge resolution CGRH and its output results.