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Proceedings Paper

Precision noncontact measurement of blind holes by machine vision technology
Author(s): Zhong Ping Fang; V. Ward McGlure
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Paper Abstract

Based on optical non-contact sensing and machine vision technology, an optical non-contact measurement instrument for measuring blind holes, as well as through holes, has been developed. By projecting a precision optical target on the internal wall of hole and sensing its reflected image, the instrument can be used to measure the hole's diameter, ovality and cylindricity. An optical selective amplification system was developed that greatly increases the sensitivity of CCD camera. Experimental test shows that the sensitivity of the laboratory apparatus is about 3 micrometers /pixel and the measurement accuracy is about 10 micrometers .

Paper Details

Date Published: 18 August 1997
PDF: 7 pages
Proc. SPIE 3185, Automatic Inspection and Novel Instrumentation, (18 August 1997); doi: 10.1117/12.284041
Show Author Affiliations
Zhong Ping Fang, Gintic Institute of Manufacturing Technology (Singapore)
V. Ward McGlure, Gintic Institute of Manufacturing Technology (Singapore)

Published in SPIE Proceedings Vol. 3185:
Automatic Inspection and Novel Instrumentation
Anthony Tung Shuen Ho; Sreenivas Rao; Lee Ming Cheng, Editor(s)

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