Autofocusing method for high-resolution three-dimensional profilometry

Xiaowei Hu, Guijin Wang, Jae Sang Hyun, Yujin Zhang, Huazhong Yang, Song Zhang

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


State-of-the-art high-accuracy three-dimensional (3D) profilometry systems typically use a lens with a fixed focal length, making it difficult for them to measure scenes with large depth variations, especially dynamically changing ones. To address this need, this Letter proposes a novel, to the best of our knowledge, autofocusing method for high-resolution 3D profilometry with a digital fringe projection technique by (1) developing a novel continuous geometric parameter model for systems using electrically tunable lenses and (2) employing a focal plane detection algorithm. The validity of the proposed method is confirmed by experiments.

Original languageEnglish
Pages (from-to)375-378
Number of pages4
JournalOptics Letters
Issue number2
Publication statusPublished - 2020 Jan 15

Bibliographical note

Publisher Copyright:
© 2020 Optical Society of America.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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