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Proceedings Paper

Focal length measurement of microlens-array by the clarity function of digital image
Author(s): Xianchang Zhu; Fan Wu; Xuedong Cao; Shibin Wu; Peng Zhang; Hongwei Jing
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Paper 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.

Paper Details

Date Published: 15 October 2012
PDF: 9 pages
Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84171E (15 October 2012); doi: 10.1117/12.973641
Show Author Affiliations
Xianchang Zhu, Institute of Optics and Electronics (China)
Fan Wu, Institute of Optics and Electronics (China)
Xuedong Cao, Institute of Optics and Electronics (China)
Shibin Wu, Institute of Optics and Electronics (China)
Peng Zhang, Institute of Optics and Electronics (China)
Hongwei Jing, Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 8417:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Libin Xiang; Sandy To, Editor(s)

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