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Straightness measurements by use of a reflection confocal optical system.

Authors
  • Matsuda, K
  • Roy, M
  • O'Byrne, J W
  • Fekete, P W
  • Eiju, T
  • Sheppard, C J
Type
Published Article
Journal
Applied optics
Publication Date
Sep 01, 1999
Volume
38
Issue
25
Pages
5310–5318
Identifiers
PMID: 18324033
Source
Medline
License
Unknown

Abstract

Straightness measurement is a very important technique in the field of mechanical engineering. A particular application for straightness measurement is high-accuracy machining on a diamond-turning lathe. We propose a novel, to our knowledge, optical method for measuring the straightness of motion, and its mathematical analysis is outlined. The technique is based on measurement of the lateral displacement of point images by use of reflection confocal optical systems. The advantages of this method are that (i) the lateral displacements in the direction of the two axes perpendicular to the optical axis can be measured, (ii) the rotation angles around all three axes can be measured, and (iii) reflection optical systems are more compact in length than are transmission optical systems.

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