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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 | Conference: | Proceedings of SPIE - The International Conference on Photonics and Optical Engineering (icPOE 2014) | 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: | 10.1117/12.2076853 | Schools: | School of Mechanical and Aerospace Engineering | 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 |
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|---|---|---|---|---|
| A new autofocus method based on angular spectrum method in digital holography.pdf | 1.01 MB | Adobe PDF |  View/Open |
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