Quantitative phase from defocused intensity by image deconvolution
Asundi, Anand Krishna
Date of Issue2013
International Conference on Optics in Precision Engineering and Nanotechnology (2013 : Singapore)
School of Mechanical and Aerospace Engineering
We present a method for quantitative phase recovery using the axially defocused intensity information based on the phase optical transfer function in defocused situation. The image formation process is linearized by subtraction of two intensity images with equal and opposite defocus distances and quantitative phase information is separated and extracted by solving an inverse problem with Wiener filtering. Experiments confirm the accuracy and stability of the proposed method outperforms the transport-of-intensity reconstruction method.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). This paper was published in International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013) and is made available as an electronic reprint (preprint) with permission of SPIE. The paper can be found at the following official DOI: [http://dx.doi.org/10.1117/12.2018759]. 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.