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11 August 2008 Wide dynamic beam size range lateral-shear interferometer
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. U. Hii and K. H. Kwek "Wide dynamic beam size range lateral-shear interferometer", Proc. SPIE 7063, Interferometry XIV: Techniques and Analysis, 706318 (11 August 2008);

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