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Proceedings Paper

Rotating Shearing Plate Interferometer
Author(s): W . C. Sweatt; R. C. Duffus
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Paper Abstract

The rotatable shearing plate interferometer provides a fast and simple manual method of measuring defocus, astigmatism and coma in a collimated laser beam. The shearing plate is mounted at a 45 degree angle relative to the incident beam. The plate in its housing is rotated about the axis of the incident beam. This allows the beam to be sheared in the horizontal, the vertical, or any other direction. Astigmatism and defocus can be calculated from fringe tilt measurements taken at any three angles, for example, 0, 45 and 90 degrees. Coma can be calculated from fringe curvatures measured at 0 and 90 degrees.

Paper Details

Date Published: 1 January 1987
PDF: 5 pages
Proc. SPIE 0818, Current Developments in Optical Engineering II, (1 January 1987); doi: 10.1117/12.978899
Show Author Affiliations
W . C. Sweatt, Sandia National Laboratories (United States)
R. C. Duffus, Lawrence Livermore National Laboratories (United States)

Published in SPIE Proceedings Vol. 0818:
Current Developments in Optical Engineering II
Robert E. Fischer; Warren J. Smith, Editor(s)

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