Optimization design and error analysis of moiré deflection system

Litong Song; Shibin Wu; Long Kuang; Xuedong Cao; Wei Yang; Hongwei Jing

doi:10.1117/12.868628

9 November 2010 Optimization design and error analysis of moiré deflection system

Litong Song, Shibin Wu, Long Kuang, Xuedong Cao, Wei Yang, Hongwei Jing

Proceedings Volume 7849, Optical Design and Testing IV; 78491H (2010) https://doi.org/10.1117/12.868628
Event: Photonics Asia 2010, 2010, Beijing, China

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.

Citation Download Citation

Litong Song, Shibin Wu, Long Kuang, Xuedong Cao, Wei Yang, and Hongwei Jing "Optimization design and error analysis of moiré deflection system", Proc. SPIE 7849, Optical Design and Testing IV, 78491H (9 November 2010); https://doi.org/10.1117/12.868628

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