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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 14 — Jul. 14, 2014
  • pp: 17016–17029

High contrast ratio and compact-sized prism for DLP projection system

Yung-Chih Huang and Jui-Wen Pan  »View Author Affiliations

Optics Express, Vol. 22, Issue 14, pp. 17016-17029 (2014)

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In this paper, a novel light separator with contrast ratio enhancement but maintaining the optical efficiency of the DLP projection system is proposed. The main capability of the novel light separator is to direct the uncontrolled light away from the image system. The working theorem for the novel light separator is derived as well. Uncontrolled light is kept away from the image system by a total internal reflection surface, thereby effectively improving the image quality. Compared with the conventional contrast ratio enhancement method, the FO:FO contrast ratio can be improved from 839:1 to 48250:1, the ANSI contrast ratio can be improved from 180:1 to 306:1, while the image system efficiency remains at 76.2%.

© 2014 Optical Society of America

OCIS Codes
(220.4830) Optical design and fabrication : Systems design
(230.3670) Optical devices : Light-emitting diodes
(230.5480) Optical devices : Prisms
(330.1800) Vision, color, and visual optics : Vision - contrast sensitivity
(110.2945) Imaging systems : Illumination design

ToC Category:
Optical Devices

Original Manuscript: April 30, 2014
Revised Manuscript: June 20, 2014
Manuscript Accepted: June 24, 2014
Published: July 3, 2014

Virtual Issues
Vol. 9, Iss. 9 Virtual Journal for Biomedical Optics

Yung-Chih Huang and Jui-Wen Pan, "High contrast ratio and compact-sized prism for DLP projection system," Opt. Express 22, 17016-17029 (2014)

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