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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 17 — Jun. 10, 2007
  • pp: 3396–3399

Diffraction characteristics of a submicrometer grating for a light guide plate

Yan Ye, Donglin Pu, Yun Zhou, and Linsen Chen  »View Author Affiliations

Applied Optics, Vol. 46, Issue 17, pp. 3396-3399 (2007)

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The diffraction transmission characteristics of submicrometer gratings (SMGs) designed for coupling tricolor light out of a light guide plate (LGP) are discussed. Three discrete SMGs are designed for three special wavelengths: red ( 700   nm ) , green ( 546.1   nm ) , and blue ( 435.8   nm ) . The propagation direction of the output tricolor light is perpendicular to the surface of the LGP and can pass through the corresponding pixels of liquid crystal. Calculated by the rigorous coupled-wave theory, the first-order transmission efficiency as a function of grating depth is found to be approximate to a sinusoidlike curve and can be utilized to obtain uniform illumination. The theoretical maximum transmission is as much as 44%. The performance of the LGP composed of SMGs is also demonstrated by our experiments. Compared with other types of LGP, the present device has the advantage of flexible control of illumination angle and wavelengths. Additionally, lossy and costly color filters are unnecessary in the proposed configuration.

© 2007 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(220.4830) Optical design and fabrication : Systems design
(260.6970) Physical optics : Total internal reflection

ToC Category:
Diffraction and Gratings

Original Manuscript: September 18, 2006
Revised Manuscript: January 21, 2007
Manuscript Accepted: January 29, 2007
Published: May 18, 2007

Yan Ye, Donglin Pu, Yun Zhou, and Linsen Chen, "Diffraction characteristics of a submicrometer grating for a light guide plate," Appl. Opt. 46, 3396-3399 (2007)

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