Projected fringe profilometry using a liquidcrystal spatial light modulator to extend the depth measuring range

Wei Hung Su, Chun Hsiang Hsu, Wei Chia Su, Jung Ping Liu

Research output: Contribution to journalArticle

4 Citations (Scopus)


An approach using a liquid-crystal spatial light modulator (LC-SLM) to enlarge the depth measuring range of the projected fringe profilometry is presented. This approach is especially applicable to detect dynamic objects with micro-scale sizes. Compared with a typical 2D image system, the LC-SLM provides a better performance for a 3D shape sensing system. The main advantages include (1) a much higher allowance to increase in the depth measuring range, (2) easiness to compensate perspective distortion and geometric distortion, (3) very high accuracy (in the micron-range) and (4) only one phase measurement needed for operation.

Original languageEnglish
Pages (from-to)3272-3283
Number of pages12
JournalOptics Express
Issue number4
Publication statusPublished - 2011 Feb 14


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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