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Optical Engineering

Error analysis of gratings in optical pickup heads
Author(s): Haitao Zhang; Ruizhen Cui; Mali Gong; Dazun Zhao; Ping Yan; Weipu Jia
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Paper Abstract

To achieve precise energy distribution among light beams diffracted by a rough surface-relief grating in optical pickup heads, we model the grating with a scalar theory. The grating is assumed to be a trapezoid shape with different roughnesses for the top and the bottom surfaces. The model includes rectangle, triangle, and sawtooth shapes as special cases. Using this model, we investigate the influence of grating parameters on diffraction efficiencies and deduce Strehl ratios for different surface roughness values.

Paper Details

Date Published: 1 August 2002
PDF: 7 pages
Opt. Eng. 41(8) doi: 10.1117/1.1486244
Published in: Optical Engineering Volume 41, Issue 8
Show Author Affiliations
Haitao Zhang, Tsinghua Univ. (China)
Ruizhen Cui, Tsinghua Univ. (China)
Mali Gong, Tsinghua Univ. (China)
Dazun Zhao, Beijing Institute of Technology (China)
Ping Yan, Tsinghua Univ. (China)
Weipu Jia, Tsinghua Univ. (China)

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