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Proceedings Paper

Optimization design and error analysis of moiré deflection system
Author(s): Litong Song; Shibin Wu; Long Kuang; Xuedong Cao; Wei Yang; Hongwei Jing
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Paper Abstract

Moiré deflectometry is used for the measurement of focal lengths of optical lenses in this paper. Detailed uncertainty analysis is done, and achievable accuracy is discussed. To increase the measurement accuracy, we propose two useful ways by changing the two systemic parameters (angle and space between two gratings). Firstly, we find that the space between two gratings affect the error from the tilt angle of moiré fringe greatly. And optimum space between two gratings for minimum error is referred to. In the other hand, enhancing the angle between the two grating's ruling's lines moderately can reduce error from the angle of two gratings greatly. Theoretical analysis and experimental results indicate that, higher measurement accuracy can be achieved by changing the systemic parameters opportunely.

Paper Details

Date Published: 9 November 2010
PDF: 7 pages
Proc. SPIE 7849, Optical Design and Testing IV, 78491H (9 November 2010); doi: 10.1117/12.868628
Show Author Affiliations
Litong Song, Graduate Univ. of Chinese Academy of Sciences (China)
Institute of Optics and Electronics (China)
Shibin Wu, Institute of Optics and Electronics (China)
Long Kuang, Institute of Optics and Electronics (China)
Xuedong Cao, Institute of Optics and Electronics (China)
Wei Yang, Institute of Optics and Electronics (China)
Hongwei Jing, Institute of Optics and Electronics (China)

Published in SPIE Proceedings Vol. 7849:
Optical Design and Testing IV
Yongtian Wang; Julie Bentley; Chunlei Du; Kimio Tatsuno; Hendrik P. Urbach, Editor(s)

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