Novel cross-correlation algorithm for reducing noise-related errors in array-type optical triangulation displacement sensors

Kyung-Chan Kim; SeBaek Oh; Soo Hyun Kim; Yoon Keun Kwak

doi:10.1117/12.426874

17 May 2001 Novel cross-correlation algorithm for reducing noise-related errors in array-type optical triangulation displacement sensors

Kyung-Chan Kim, SeBaek Oh, Soo Hyun Kim, Yoon Keun Kwak

Author Affiliations +

Proceedings Volume 4285, Testing, Reliability, and Applications of Optoelectronic Devices; (2001) https://doi.org/10.1117/12.426874
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

Abstract

Optical triangulation displacement sensors are widely used for their non-contact measurement characteristics, sub-micron order resolution, simple structure, and long operation range. However, errors originating from surface inclination, speckle effect, light source fluctuation, and detector noise limit the wider use. In order to minimize these errors, the structure for optical triangulation displacement sensors, which is composed of an incoherent source and a linear CCD, has been proposed. But using a linear CCD causes several problems in signal processing. In this paper, we propose an adequate signal processing system for the proposed structure. With the help of the proposed algorithm, the limited resolution problem of CCD can be solved.

Citation Download Citation

Kyung-Chan Kim, SeBaek Oh, Soo Hyun Kim, and Yoon Keun Kwak "Novel cross-correlation algorithm for reducing noise-related errors in array-type optical triangulation displacement sensors", Proc. SPIE 4285, Testing, Reliability, and Applications of Optoelectronic Devices, (17 May 2001); https://doi.org/10.1117/12.426874

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