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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 20 — Jul. 10, 1997
  • pp: 4761–4771

Phase volume holographic optical components for high-brightness single-LCD projectors

C. Joubert, B. Loiseaux, A. Delboulbé, and J. P. Huignard  »View Author Affiliations


Applied Optics, Vol. 36, Issue 20, pp. 4761-4771 (1997)
http://dx.doi.org/10.1364/AO.36.004761


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Abstract

Projection systems based on liquid-crystal displays (LCD’s) offer new opportunities to display high-definition and large-size TV images. There are two types of LCD projector architectures: the 3-LCD architecture uses one LCD for each primary color, red, green, and blue, whereas a single-LCD configuration employs only one LCD paved with color filters. The single-LCD projector is simple and compact but suffers from a poor luminous efficiency because of losses in the color filters: each filter transmits only ∼1/3 of the flux emitted by the lamp. To increase this optical efficiency, we propose to introduce volume holographic elements in the architecture of a single-LCD projector. Innovative systems are presented in which volume holographic elements realize the spatiochromatic illumination of the LCD. This illumination consists of selectively directing all the light that corresponds to a primary color, red, green, or blue, in the pixel addressed with the corresponding video composite signal and exploits the spectral selectivity and dispersion properties of volume holographic gratings and lenses. The two main advantages of such illumination are the suppression of the color filters and the recovery of the light lost in a classical architecture by absorption of the color filters. A complete luminous efficiency analysis of spatiochromatic illumination with volume holographic elements is presented. The achieved performances are compared with classical single-LCD projectors.

© 1997 Optical Society of America

History
Original Manuscript: October 17, 1996
Revised Manuscript: January 15, 1997
Published: July 10, 1997

Citation
C. Joubert, B. Loiseaux, A. Delboulbé, and J. P. Huignard, "Phase volume holographic optical components for high-brightness single-LCD projectors," Appl. Opt. 36, 4761-4771 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-20-4761

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