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Proceedings Paper

Aligning and measuring the curvature and thickness of high-precision lens
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Paper Abstract

The radius of curvature is one of the most important specifications for spherical optics [1]. There are several methods and devices currently on the market that can be used to measure it, including optical level, non-contact laser interferometer (Interferometer), a probe-contact profiler (Profilometer), the centering machine and three-point contact ball diameter meter (Spherometer). The amount that can be measured with a radius of curvature of the lens aperture range depends on the interferometer standard lens f / number and lens of R / number (radius of curvature divided by the clear aperture of the spherical surface ratio between them). Unfortunately, for lens with diameter greater than 300 mm, the device is limited by the size of the holding fixture lenses or space. This paper aims to provide a novel surface contour detection method and machine, named “CMM spherometry by probe compensation,” to measure the radius and thickness of the curvature of the optical surface by a coordinate measurement machine (CMM). In order to obtain more accurate optimization results, we used probe and temperature compensation to discuss the effect. The trace samples and the measurement results of CMM and the centering machine, which has top and bottom autocollimators, are compared.

Paper Details

Date Published: 2 September 2015
PDF: 8 pages
Proc. SPIE 9573, Optomechanical Engineering 2015, 95730U (2 September 2015); doi: 10.1117/12.2185525
Show Author Affiliations
Kun-Huan Wu, Instrument Technology Research Ctr. (Taiwan)
Shenq-Tsong Chang, Instrument Technology Research Ctr. (Taiwan)
Ming-Ying Hsu, Instrument Technology Research Ctr. (Taiwan)
Ting-Ming Huang, Instrument Technology Research Ctr. (Taiwan)
Wei-Yao Hsu, Instrument Technology Research Ctr. (Taiwan)
Shih-Feng Tseng, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 9573:
Optomechanical Engineering 2015
Alson E. Hatheway, Editor(s)

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