Open AccessSingle-shot higher-order transport-of-intensity quantitative phase imaging based on computer-generated holography
Author(s) -
Naru Yoneda,
Aoi Onishi,
Yusuke Saita,
Kaoru Komuro,
Takanori Nomura
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.415598
Subject(s) - optics , holography , point spread function , fourier optics , image plane , grating , cardinal point , intensity (physics) , fourier transform , lens (geology) , light intensity , holographic display , spatial frequency , image quality , phase (matter) , digital holographic microscopy , physics , computer science , image (mathematics) , computer vision , quantum mechanics
The imaging quality of quantitative phase imaging (QPI) based on the transport of intensity equation (TIE) can be improved using a higher-order approximation for defocused intensity distributions. However, this requires mechanically scanning an image sensor or object along the optical axis, which in turn requires a precisely aligned optical setup. To overcome this problem, a computer-generated hologram (CGH) technique is introduced to TIE-based QPI. A CGH generating defocused point spread function is inserted in the Fourier plane of an object. The CGH acts as a lens and grating with various focal lengths and orientations, allowing multiple defocused intensity distributions to be simultaneously detected on an image sensor plane. The results of a numerical simulation and optical experiment demonstrated the feasibility of the proposed method.