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Optical Engineering

Oblique fiber optic diffraction interferometer for testing spherical mirrors
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Paper Abstract

We present a new type of point diffraction interferometer that employs single-mode optical fibers instead of traditional pinholes. Two optical fibers with different exit endfaces are used; one is normally cut and the other obliquely cleaved. The normally cut fiber is used to generate a near-perfect spherical reference wave. The test wave is produced from the oblique fiber that performs two functions: generating a spherical wave to illuminate the test optics, and reflecting the test wave for common-path combination with the reference wave. The interferometer proposed in this investigation is found suitable for testing large size mirrors with a relatively simple overall hardware configuration.

Paper Details

Date Published: 1 December 2005
PDF: 4 pages
Opt. Eng. 44(12) 125601 doi: 10.1117/1.2148367
Published in: Optical Engineering Volume 44, Issue 12
Show Author Affiliations
Hagyong Kihm, Korea Advanced Institute of Science and Technology (South Korea)
Seung-Woo Kim, Korea Advanced Institute of Science and Technology (South Korea)

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