Focal length measurement of microlens-array by the clarity function of digital image

Xianchang Zhu; Fan Wu; Xuedong Cao; Shibin Wu; Peng Zhang; Hongwei Jing

doi:10.1117/12.973641

15 October 2012 Focal length measurement of microlens-array by the clarity function of digital image

Xianchang Zhu, Fan Wu, Xuedong Cao, Shibin Wu, Peng Zhang, Hongwei Jing

Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 84171E (2012) https://doi.org/10.1117/12.973641
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

In this paper, a method for the focal length measurement of Microlens-array (MLA) is introduced. The measuring setup is composed by monochromatic, condenser, collimator, MLA, microscope and CCD sensor. An experiment was performed using a MLA whose focal length is about 8 mm and a GUI based on Matlab software was developed to analyze the image gathered at the vertex and the focus by the clarity of digital image processing technology. The measuring uncertainty of this method is about 0.8% and this method introduced in this paper can finish tens of microlens array measurement at a single shot. Compared with traditional technology for MLA measuring, this method not only has a preferable precision but also super efficiency.

Citation Download Citation

Xianchang Zhu, Fan Wu, Xuedong Cao, Shibin Wu, Peng Zhang, and Hongwei Jing "Focal length measurement of microlens-array by the clarity function of digital image", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84171E (15 October 2012); https://doi.org/10.1117/12.973641

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