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18 May 2009Design and evaluation of diffractive optical elements: optimization by using iterative angular spectrum approach and evaluation based on vector diffraction theory
Diffractive optical elements (DOE) are used for various purposes, such as a beam shaper, beam splitter and so on. In
order to design DOEs, iterative Fourier transform algorithm (IFTA) is widely used. IFTA is fast and effective
optimization method and can handle large size data. In the IFTA, propagation in the far field and near field is described
by Fourier transform and Fresnel transform, respectively. Iterative angular spectrum approach (IASA) is one of iterative
methods based on angular spectrum technique. IASA adopt angular spectrum technique as expression of propagation in
near field instead of Fresnel transform. Angular spectrum technique is based on scalar diffraction theory and satisfies
Helmholtz equation; therefore angular spectrum technique is the accurate method for the calculation of diffraction.
We designed a DOE by using IASA and evaluated its diffraction characteristics based on vector diffraction theory. In
this paper, we report on the outcome.
Shuhei Yoshida andManabu Yamamoto
"Design and evaluation of diffractive optical elements: optimization by using iterative angular spectrum approach and evaluation based on vector diffraction theory", Proc. SPIE 7356, Optical Sensors 2009, 73561Z (18 May 2009); https://doi.org/10.1117/12.820751
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Shuhei Yoshida, Manabu Yamamoto, "Design and evaluation of diffractive optical elements: optimization by using iterative angular spectrum approach and evaluation based on vector diffraction theory," Proc. SPIE 7356, Optical Sensors 2009, 73561Z (18 May 2009); https://doi.org/10.1117/12.820751