Fiber optic diffraction interferometer for testing spherical mirrors

Hagyong Kihm; Seung-Woo Kim

doi:10.1117/12.472239

20 June 2002 Fiber optic diffraction interferometer for testing spherical mirrors

Hagyong Kihm, Seung-Woo Kim

Proceedings Volume 4777, Interferometry XI: Techniques and Analysis; (2002) https://doi.org/10.1117/12.472239
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Light emanating from the polished end of a single-mode fiber forms into a near-perfect spherical wave within a finite solid angle, which can readily be explained by diffraction theory. Utilizing the useful phenomenon, we in this paper present a fiber optic diffraction interferometer that has specially been devised for testing spherical mirrors. The interferometer adopts three optical fibers; one is for generating spherical reference wave, another is for illuminating the mirror under test and the other is for calibrating the interferometer. A special assembly of sliding prism driven by a PZT actuator provides necessary phase shifts with a high immunity to environmental disturbances. In conclusion, the proposed fiber optic diffraction interferometer enables us to achieve a measurement accuracy of an order of magnitude better than conventional testing schemes using the Fizeau interferometers of which measurement accuracy is ultimately limited by the reference surface to (lambda) /50, where λ is the wavelength of the source.

Citation Download Citation

Hagyong Kihm and Seung-Woo Kim "Fiber optic diffraction interferometer for testing spherical mirrors", Proc. SPIE 4777, Interferometry XI: Techniques and Analysis, (20 June 2002); https://doi.org/10.1117/12.472239

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available