Microscopic three-dimensional topometry with ferroelectric liquid-crystal-on-silicon displays
| Autor: | Klaus Körner, Jean-Marc Nivet, Klaus-Peter Proll, Hans J. Tiziani |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Liquid-crystal display business.industry Materials Science (miscellaneous) Physics::Optics Moiré pattern Grating Ferroelectricity Industrial and Manufacturing Engineering Structured-light 3D scanner law.invention Condensed Matter::Soft Condensed Matter Liquid crystal on silicon Optics Liquid crystal law Optoelectronics Business and International Management Image sensor business |
| Zdroj: | Applied optics. 42(10) |
| ISSN: | 1559-128X |
| Popis: | When three-dimensional measurements are conducted with fringe projection, the quality of the grating used for the generation of the fringes is important. It has a direct influence on the achievable depth resolution in a given measurement setup. In the past, Ronchi gratings or gratings written in nematic liquid-crystal displays or in digital micromirror devices have been used. We report on the application of a reflective ferroelectric liquid-crystal-on-silicon display as the fringe-generating element in a setup based on a stereo microscope. With this device the depth resolution of measurements by use of phase-shifting algorithms can be significantly improved compared with the application of a Ronchi grating or a nematic liquid-crystal display. |
| Databáze: | OpenAIRE |
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