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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 13 — Jun. 27, 2005
  • pp: 5052–5063

Backward iterative quantization methods for designs of multilevel diffractive optical elements

Wei-Feng Hsu  »View Author Affiliations

Optics Express, Vol. 13, Issue 13, pp. 5052-5063 (2005)

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Four types of backward iterative quantization (BIQ) methods were proposed to design multilevel diffractive optical elements (DOEs). In these methods, the phase values first quantized in the early quantization steps are those distant from the quantization levels, instead of the neighboring ones that the conventional iterative method began with. Compared with the conventional forward iterative quantization (FIQ), the Type 4 BIQ achieved higher efficiencies and signal-to-noise ratios for 4-level unequal-phase DOEs. For equal-phase DOEs, the Type 4 BIQ performed better when the range increment of each quantization step was large (>15°), while the FIQ performed better when the range increment was small (<15°).

© 2005 Optical Society of America

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.1970) Diffraction and gratings : Diffractive optics

ToC Category:
Research Papers

Original Manuscript: May 16, 2005
Revised Manuscript: June 17, 2005
Published: June 27, 2005

Wei-Feng Hsu, "Backward iterative quantization methods for designs of multilevel diffractive optical elements," Opt. Express 13, 5052-5063 (2005)

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