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Proceedings Paper

Light-field-based phase imaging
Author(s): Jingdan Liu; Tingfa Xu; Weirui Yue; Guohai Situ
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Paper Abstract

Phase contains important information about the diffraction or scattering property of an object, and therefore the imaging of phase is vital to many applications including biomedicine and metrology, just name a few. However, due to the limited bandwidth of image sensors, it is not possible to directly detect the phase of an optical field. Many methods including the Transport of Intensity Equation (TIE) have been well demonstrated for quantitative and non-interferometric imaging of phase. The TIE offers an experimentally simple technique for computing phase quantitatively from two or more defocused images. Usually, the defocused images were experimentally obtained by shifting the camera along the optical axis with slight intervals. Note that light field imaging has the capability to take an image stack focused at different depths by digital refocusing the captured light field of a scene. In this paper, we propose to combine Light Field Microscopy and the TIE method for phase imaging, taking the digital-refocusing advantage of Light Field Microscopy. We demonstrate the propose technique by simulation results. Compare with the traditional camera-shifting technique, light-field imaging allows the capturing the defocused images without any mechanical instability and therefore demonstrate advantage in practical applications.

Paper Details

Date Published: 29 October 2014
PDF: 7 pages
Proc. SPIE 9273, Optoelectronic Imaging and Multimedia Technology III, 92730Y (29 October 2014); doi: 10.1117/12.2071051
Show Author Affiliations
Jingdan Liu, Beijing Institute of Technology (China)
Tingfa Xu, Beijing Institute of Technology (China)
Weirui Yue, Shanghai Institute of Optics and Fine Mechanics (China)
Guohai Situ, Shanghai Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 9273:
Optoelectronic Imaging and Multimedia Technology III
Qionghai Dai; Tsutomu Shimura, Editor(s)

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