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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 15, Iss. 5 — May. 1, 1998
  • pp: 1202–1211

Birefringence in rapidly rotating glass disks

Peter de Groot  »View Author Affiliations


JOSA A, Vol. 15, Issue 5, pp. 1202-1211 (1998)
http://dx.doi.org/10.1364/JOSAA.15.001202


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Abstract

Centripetal forces modify the optical properties of a rotating glass disk, thus creating a circularly symmetric distortion in the refractive index. This centripetal birefringence has a strong radial dependency and increases with the square of the spin speed. The effect on a polarized beam transmitted through the glass may be reduced mathematically to that of an effective wave plate whose retardance and orientation may be calculated from knowledge of the stress distribution in the disk. Alternatively, one can directly measure the Jones-matrix elements that correspond to the effective wave plate by use of polarization phase measurements at two or more locations on the disk. This direct measurement compensates the centripetal birefringence in the instrumentation employed by the data-storage industry to measure the flying height of read–write heads.

© 1998 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(160.2750) Materials : Glass and other amorphous materials
(260.1440) Physical optics : Birefringence
(260.5430) Physical optics : Polarization

History
Original Manuscript: April 15, 1997
Revised Manuscript: November 7, 1997
Manuscript Accepted: November 3, 1997
Published: May 1, 1998

Citation
Peter de Groot, "Birefringence in rapidly rotating glass disks," J. Opt. Soc. Am. A 15, 1202-1211 (1998)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-15-5-1202

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