Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/88187
Title: A new autofocus method based on angular spectrum method in digital holography
Authors: Wang, Zhaomin
Qu, Weijuan
Yang, Fang
Wen, Yongfu
Anand, Asundi
Keywords: Angular Spectrum Method
Digital Holography
DRNTU::Engineering::Mechanical engineering
Issue Date: 2015
Source: Wang, Z., Qu, W., Yang, F., Wen, Y., & Anand, A. (2015). A new autofocus method based on angular spectrum method in digital holography. Proceedings of SPIE - The International Conference on Photonics and Optical Engineering (icPOE 2014), 9449, 94492H-. doi:10.1117/12.2076853
Abstract: The determination of numerical reconstruction distance is key to recover the wavefront at focal plane in digital holography. In this paper, we propose a new autofocus method based on angular spectrum method (ASM). The proposed method takes successive Fourier transform after 1st order spectrum selection, and then calculates the summation. It saves operations compared to classic autofocus functions. When an exhaustive z-axis search is performed, the proposed method obtains unimodality coincided with the results from four classic autofocus functions. Moreover, the proposed method is more time-effective, which is the optimal one for ASM.
URI: https://hdl.handle.net/10356/88187
http://hdl.handle.net/10220/46903
DOI: http://dx.doi.org/10.1117/12.2076853
Rights: © 2015 Society of Photo-optical Instrumentation Engineers (SPIE). This paper was published in Proceedings of SPIE - The International Conference on Photonics and Optical Engineering (icPOE 2014) and is made available as an electronic reprint (preprint) with permission of Society of Photo-optical Instrumentation Engineers (SPIE). The published version is available at: [http://dx.doi.org/10.1117/12.2076853]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Conference Papers

Files in This Item:
File Description SizeFormat 
A new autofocus method based on angular spectrum method in digital holography.pdf1.01 MBAdobe PDFThumbnail
View/Open

Google ScholarTM

Check

Altmetric

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.