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Proceedings Paper

Wide dynamic beam size range lateral-shear interferometer
Author(s): K. U. Hii; K. H. Kwek
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Paper Abstract

A novel method for testing the collimation of coherent optical beam is presented. Two prisms are used to define a thin air wedge with a wedge angle. A wide range of beam sizes can be tested down to a few millimeters in diameter. By redirecting the transmitted beam back to the air wedge so that it experiences a shear in the reversed direction, a double-shearing interferometry can be established. The gap separation and wedge angle can be varied to maintain high sensitivity (twice that of the wedge plate design) over the wide beam size range.

Paper Details

Date Published: 11 August 2008
PDF: 8 pages
Proc. SPIE 7063, Interferometry XIV: Techniques and Analysis, 706318 (11 August 2008); doi: 10.1117/12.794604
Show Author Affiliations
K. U. Hii, Univ. of Malaya (Malaysia)
K. H. Kwek, Univ. of Malaya (Malaysia)


Published in SPIE Proceedings Vol. 7063:
Interferometry XIV: Techniques and Analysis
Joanna Schmit; Katherine Creath; Catherine E. Towers, Editor(s)

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