Effect of a spoke surface error on a phase mask in a computational imaging system

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50966

Title:	Effect of a spoke surface error on a phase mask in a computational imaging system
Authors:	Chang,CC;Lee,CC
Contributors:	光電科學與工程學系
Date:	2010
Issue Date:	2012-03-27 18:14:07 (UTC+8)
Publisher:	國立中央大學
Abstract:	The effect of a spoke surface error on a phase mask in a computational imaging system was analyzed by combining the similarity of the point spread function (PSF) and the peak signal-to-noise ratio (PSNR) of de-convoluted images. The spoke surface error was applied on a phase mask with different peak-to-valley (P-V) values with various numbers of spoke rings in simulation. The minimum requirement of PSF similarity will be determined by a given PSNR threshold, which relates the defocus aberration. Finally, it can be concluded that a low-spatial frequency surface error is critical for a cubic phase mask in a computational imaging system with lower P-V error.
Relation:	JOURNAL OF MODERN OPTICS
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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