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Surface profiling of object using varifocal lens with image contrast

Chen, Chih-Yen, Wang, Lijuan, Fan, Chen-Liang, Cheng, Pi-Ying, Weng, Chun-Jen (2019) Surface profiling of object using varifocal lens with image contrast. Optical Review, 26 (5). pp. 493-499. ISSN 1340-6000. E-ISSN 1349-9432. (doi:10.1007/s10043-019-00539-x) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

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https://dx.doi.org/10.1007/s10043-019-00539-x

Abstract

The measurement of automated and fast focusing on the improvement of speed and accuracy is an important issue in industrial inspection and biomedical microscopy. In this study, we developed a novel optical imaging system in which varifocal lenses are used to characterize the 3D surface topography of samples. The performance of the proposed system was evaluated using twelve focusing algorithms. Experimental results demonstrate the feasibility and effectiveness of the proposed system in the near real-time construction of multi-focus fusion images with large depth of field from which to derive 3D surface profiles.

Item Type: Article
DOI/Identification number: 10.1007/s10043-019-00539-x
Uncontrolled keywords: Varifocal lens; Focusing algorithms; Surface topography; Sharpness; Displacement measurement
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA165 Engineering instruments, meters etc. Industrial instrumentation
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: Lijuan Wang
Date Deposited: 25 Oct 2019 15:37 UTC
Last Modified: 06 Feb 2020 04:20 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/77837 (The current URI for this page, for reference purposes)
Wang, Lijuan: https://orcid.org/0000-0002-2517-2728
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