{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,21]],"date-time":"2026-03-21T18:13:58Z","timestamp":1774116838317,"version":"3.50.1"},"reference-count":18,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2019,3,25]],"date-time":"2019-03-25T00:00:00Z","timestamp":1553472000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004663","name":"Ministry of Science and Technology, Taiwan","doi-asserted-by":"publisher","award":["MOST-107-2221-E-008-047-MY2."],"award-info":[{"award-number":["MOST-107-2221-E-008-047-MY2."]}],"id":[{"id":"10.13039\/501100004663","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The demand for rapid online optical inspection of gear tooth surfaces is increasing, especially for precision gears. In this study, a non-contact optical measurement method was established for the inspection of gear tooth surfaces. For the system architecture, a halogen lamp was selected as the light source, and a collimated beam was produced by an autocollimator. Subsequently, moir\u00e9 fringes were formed as the collimated beam went through the two linear gratings. The moir\u00e9 fringes projected on the gear tooth surface were recorded with a charge-coupled device (CCD) camera, and the contour of the gear tooth surface was estimated and reconstructed from the phase information of the fringes by our developed computer codes. To verify the accuracy of the system, a spur gear tooth surface measured by a commercial coordinate measuring machine (CMM) was defined as the reference tooth profile. The tooth topography, involute profile deviation, and axial-direction deviation were successfully calculated by measuring the deviation of the optically measured surface based on the reference gear tooth profiles measured using the CMM.<\/jats:p>","DOI":"10.3390\/s19061450","type":"journal-article","created":{"date-parts":[[2019,3,25]],"date-time":"2019-03-25T06:56:52Z","timestamp":1553497012000},"page":"1450","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["Optical Inspection System for Gear Tooth Surfaces Using a Projection Moir\u00e9 Method"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7886-3680","authenticated-orcid":false,"given":"Yi-Cheng","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, National Central University; Taoyuan 32001, Taiwan"}]},{"given":"Jr-Yi","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, National Central University; Taoyuan 32001, Taiwan"}]}],"member":"1968","published-online":{"date-parts":[[2019,3,25]]},"reference":[{"key":"ref_1","unstructured":"Peters, J., Goch, G., and Gunther, A. 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Eng."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"6769","DOI":"10.1016\/j.ijleo.2013.05.073","article-title":"Error analysis of phase shifting by varying the incident angle of parallel beams in shadow moir\u00e9","volume":"124","author":"Mu","year":"2013","journal-title":"Optik"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"093605","DOI":"10.1117\/1.2044847","article-title":"High-accuracy contouring using projection moir\u00e9","volume":"44","author":"Sciammarella","year":"2005","journal-title":"Opt. Eng."},{"key":"ref_14","unstructured":"(2016, December 05). Nikon HN C3030. Available online: http:\/\/www.nikon.com\/products\/industrial-metrology\/lineup\/3d_metrology\/3d-coordinate-metrology\/hnc3030\/."},{"key":"ref_15","unstructured":"(2019, January 30). Gleason GRSL\u2014Gear Rolling Meets Advanced Laser Technology. 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Opt."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/6\/1450\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:40:23Z","timestamp":1760186423000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/6\/1450"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,3,25]]},"references-count":18,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2019,3]]}},"alternative-id":["s19061450"],"URL":"https:\/\/doi.org\/10.3390\/s19061450","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,3,25]]}}}