{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,10]],"date-time":"2026-05-10T04:24:55Z","timestamp":1778387095782,"version":"3.51.4"},"reference-count":39,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2016,10,19]],"date-time":"2016-10-19T00:00:00Z","timestamp":1476835200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>Quantitative 3D phase retrieval techniques are based on either interferometric techniques such as holography or noninterferometric intensity-based techniques such as the transport of intensity equation (TIE). Interferometric techniques are vibration-sensitive and often use a reference beam requiring complicated optical alignment. In this work we develop a simple, fast, and noninterferometric tomographic 3D phase retrieval technique based on the TIE which does not suffer from such drawbacks. The optical setup is a modified 4f TIE system which uses an SLM to replace the slow translation of the CCD required to record several diffraction patterns in a traditional TIE system. This novel TIE setup is suitable for dynamical events such as imaging biological processes. A rotating mechanical stage is constructed to obtain tomographic phase images of the object. The tomographic reconstruction algorithm is based on the Fourier slice theorem (backprojection algorithm) which applies to objects with a small refractive index span. Simulation and experimental results are shown as part of this work. A graphical user interface is developed to perform the TIE tomographic reconstruction algorithm and to synchronize the captured intensities by the CCD, the phase patterns displayed on the SLM, and the Arduino controlled rotating stage assembly.<\/jats:p>","DOI":"10.3390\/jimaging2040030","type":"journal-article","created":{"date-parts":[[2016,10,19]],"date-time":"2016-10-19T10:32:57Z","timestamp":1476873177000},"page":"30","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Non-Interferometric Tomography of Phase Objects Using Spatial Light Modulators"],"prefix":"10.3390","volume":"2","author":[{"given":"Thanh","family":"Nguyen","sequence":"first","affiliation":[{"name":"Electrical Engineering and Computer Science Department, The Catholic University of America, Washington, DC 20064, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0483-0728","authenticated-orcid":false,"given":"George","family":"Nehmetallah","sequence":"additional","affiliation":[{"name":"Electrical Engineering and Computer Science Department, The Catholic University of America, Washington, DC 20064, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2016,10,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"345","DOI":"10.1126\/science.121.3141.345","article-title":"How I Discovered Phase Contrast","volume":"121","author":"Zernike","year":"1955","journal-title":"Science"},{"key":"ref_2","first-page":"9S","article-title":"Differential microinterferometer with polarized waves","volume":"16","author":"Nomarski","year":"1955","journal-title":"J. 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