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Proceedings Paper

Grating based wide field-of-view digital lens-free holography
Author(s): Wenhui Zhang; Liangcai Cao; Hua Zhang; Hao Zhang; Guofan Jin
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Paper Abstract

To make full use of the spatial bandwidth product of imaging systems, grating based single-shot digital lens-free holography with spatial spectrum multiplexing is proposed. Multiple object waves are generated by a one-dimensional grating which is placed in near contact with the object to avoid the crosstalk among different diffraction orders during reconstruction. A multiplexed off-axis hologram is created by interference between the object waves and reference wave and captured by an image sensor in one shot. Multiple imaging areas corresponding to the captured object waves can be simultaneously retrieved during reconstruction, which is equivalent to increase the imaging area. A formula which guarantees accurate full FOV imaging without crosstalk or information loss is presented. The imaging experiments of a USAF resolution target are presented to demonstrate the feasibility of this method.

Paper Details

Date Published: 19 February 2018
PDF: 6 pages
Proc. SPIE 10557, Ultra-High-Definition Imaging Systems, 105570P (19 February 2018); doi: 10.1117/12.2295002
Show Author Affiliations
Wenhui Zhang, Tsinghua Univ. (China)
Liangcai Cao, Tsinghua Univ. (China)
Hua Zhang, Tsinghua Univ. (China)
Hao Zhang, Tsinghua Univ. (China)
Guofan Jin, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 10557:
Ultra-High-Definition Imaging Systems
Seizo Miyata; Toyohiko Yatagai; Yasuhiro Koike, Editor(s)

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