{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T00:14:02Z","timestamp":1762042442100,"version":"build-2065373602"},"reference-count":38,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2021,9,3]],"date-time":"2021-09-03T00:00:00Z","timestamp":1630627200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Horizon 2020","award":["737089"],"award-info":[{"award-number":["737089"]}]},{"DOI":"10.13039\/501100011033","name":"Agencia Estatal de Investigaci\u00f3n","doi-asserted-by":"publisher","award":["PID2019-105714RB-I00"],"award-info":[{"award-number":["PID2019-105714RB-I00"]}],"id":[{"id":"10.13039\/501100011033","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Lensless microscopy requires the simplest possible configuration, as it uses only a light source, the sample and an image sensor. The smallest practical microscope is demonstrated here. In contrast to standard lensless microscopy, the object is located near the lighting source. Raster optical microscopy is applied by using a single-pixel detector and a microdisplay. Maximum resolution relies on reduced LED size and the position of the sample respect the microdisplay. Contrarily to other sort of digital lensless holographic microscopes, light backpropagation is not required to reconstruct the images of the sample. In a mm-high microscope, resolutions down to 800 nm have been demonstrated even when measuring with detectors as large as 138 \u03bcm \u00d7 138 \u03bcm, with field of view given by the display size. Dedicated technology would shorten measuring time.<\/jats:p>","DOI":"10.3390\/s21175941","type":"journal-article","created":{"date-parts":[[2021,9,6]],"date-time":"2021-09-06T13:18:26Z","timestamp":1630934306000},"page":"5941","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["A Compact Raster Lensless Microscope Based on a Microdisplay"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3088-0590","authenticated-orcid":false,"given":"Anna","family":"Vil\u00e0","sequence":"first","affiliation":[{"name":"Department of Electronic and Biomedical Engineering, University of Barcelona, Mart\u00ed i Franqu\u00e8s 1, 08028 Barcelona, Spain"},{"name":"Institute for Nanoscience and Nanotechnology-IN2UB, University of Barcelona, Diagonal 645, 08028 Barcelona, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4471-1555","authenticated-orcid":false,"given":"Sergio","family":"Moreno","sequence":"additional","affiliation":[{"name":"Department of Electronic and Biomedical Engineering, University of Barcelona, Mart\u00ed i Franqu\u00e8s 1, 08028 Barcelona, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5431-8554","authenticated-orcid":false,"given":"Joan","family":"Canals","sequence":"additional","affiliation":[{"name":"Department of Electronic and Biomedical Engineering, University of Barcelona, Mart\u00ed i Franqu\u00e8s 1, 08028 Barcelona, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6721-7245","authenticated-orcid":false,"given":"Angel","family":"Di\u00e9guez","sequence":"additional","affiliation":[{"name":"Department of Electronic and Biomedical Engineering, University of Barcelona, Mart\u00ed i Franqu\u00e8s 1, 08028 Barcelona, Spain"},{"name":"Institute for Nanoscience and Nanotechnology-IN2UB, University of Barcelona, Diagonal 645, 08028 Barcelona, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"889","DOI":"10.1038\/nmeth.2114","article-title":"Imaging without lenses: Achievements and remaining challenges of wide-field on-chip microscopy","volume":"9","author":"Greenbaum","year":"2012","journal-title":"Nat. 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