Validity range of the improved Rayleigh–Sommerfeld method in analyzing metallic cylindrical focusing micromirrors

He, Jingwen; Mei, Guo-Ai; Ye, Jiasheng; Zhang, Yan

doi:10.1016/j.optcom.2012.10.083

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Principles Of the Etm And The Mitm1

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2013

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“…There exists a drop on the green curve when the -number is . The reason was explained in [14]. If the -number is too small, the maximum thickness of the continuous micromirror will be larger than its preset focal length.…”

Section: Principles Of the Etm And The Mitmmentioning

confidence: 99%

A Monotonic-Increasing-Thickness Model for Designing Cylindrically Diffractive Focusing Micromirrors and Micromirror Arrays

Mei

Dong

et al. 2013

J. Lightwave Technol.

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In this paper, a monotonic-increasing-thickness model (MITM) is proposed for designing cylindrically diffractive focusing micromirrors (DFMs) and cylindrically diffractive focusing micromirror arrays (arrayed DFMs). Based on rigorous electromagnetic theory and the boundary element method, numerical results reveal that focal properties of the designed DFMs are significantly improved through replacing the traditional equal-thickness model (ETM) with the proposed MITM, especially in the case of small -numbers. In addition, the superiority of the MITM to the ETM is demonstrated in designs of the arrayed DFMs. For interference effect in the arrayed DFMs, we present new explanations.Index Terms-Boundary element method, cylindrically diffractive focusing micromirrors, diffractive focusing micromirror arrays, equal-thickness model, interference effect, monotonic-increasing-thickness model.

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Section: Principles Of the Etm And The Mitmmentioning

confidence: 99%