{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T12:06:27Z","timestamp":1778587587375,"version":"3.51.4"},"reference-count":23,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2019,10,1]],"date-time":"2019-10-01T00:00:00Z","timestamp":1569888000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51775326"],"award-info":[{"award-number":["51775326"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100007219","name":"Natural Science Foundation of Shanghai","doi-asserted-by":"publisher","award":["18ZR1413700"],"award-info":[{"award-number":["18ZR1413700"]}],"id":[{"id":"10.13039\/100007219","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Major State Research Development Program of China","award":["2016YFF0101905"],"award-info":[{"award-number":["2016YFF0101905"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>With this study, we propose a method to image the tip crack on transparent materials by using digital holographic microscopy. More specifically, an optical system based on Mach\u2013Zehnder interference along with an inverted microscopy (Olympus CKX53) was used to image the tip crack of Dammar Varnish transparent material under thermal excitation. A series of holograms were captured and reconstructed for the observation of the changes of the tip crack. The reconstructed holograms were also compared temporally to compute the temporal changes, showing the crack propagation phenomena. Results show that the Dammar Varnish is sensitive to the ambient temperature. Our research demonstrates that digital holographic microscopy is a promising technique for the detection of the fine tip crack and propagation in transparent materials.<\/jats:p>","DOI":"10.3390\/jimaging5100080","type":"journal-article","created":{"date-parts":[[2019,10,1]],"date-time":"2019-10-01T11:11:16Z","timestamp":1569928276000},"page":"80","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Tip Crack Imaging on Transparent Materials by Digital Holographic Microscopy"],"prefix":"10.3390","volume":"5","author":[{"given":"Wen-Jing","family":"Zhou","sequence":"first","affiliation":[{"name":"Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bo-Yu","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hong-Xia","family":"Shen","sequence":"additional","affiliation":[{"name":"Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Deng-Ke","family":"He","sequence":"additional","affiliation":[{"name":"Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hong-Bo","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Computer and Information Sciences, Virginia Military Institute, Lexington, KY 24061, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ying-Jie","family":"Yu","sequence":"additional","affiliation":[{"name":"Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7198-9504","authenticated-orcid":false,"given":"Vivi","family":"Tornari","sequence":"additional","affiliation":[{"name":"Institute of Electronic Structure and Laser, Foundation for Research and Technology, 71110 Heraklion, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,10,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1739","DOI":"10.1364\/AO.53.001739","article-title":"Application of 3D digital image correlation to track displacements and strains of canvas paintings exposed to relative humidity changes","volume":"53","author":"Malowany","year":"2014","journal-title":"Appl. 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