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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 14, Iss. 8 — Aug. 1, 1975
  • pp: 1890–1895

Active annular-beam laser autocollimator system

P. R. Yoder, Jr., E. R. Schlesinger, and J. L. Chickvary  »View Author Affiliations


Applied Optics, Vol. 14, Issue 8, pp. 1890-1895 (1975)
http://dx.doi.org/10.1364/AO.14.001890


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Abstract

An autocollimator using an axicon and a beam expander telescope to generate a 12.5-cm. o.d. annular beam of helium–neon laser light with high (25:1) diameter-to-width ratio has been developed. It is used with a two-axis, electromagnetically actuated mirror assembly to acquire automatically and maintain dynamically autocollimation from a nearby but separately mounted annular mirror. The servo system controls beam alignment even though angular vibratory motions of the annular mirror make it appear to tilt relative to the autocollimator as much as 7 mrad at frequencies below 300 Hz. This paper describes the optical system and the alignment sensing and control system.

© 1975 Optical Society of America

History
Original Manuscript: October 21, 1974
Published: August 1, 1975

Citation
P. R. Yoder, E. R. Schlesinger, and J. L. Chickvary, "Active annular-beam laser autocollimator system," Appl. Opt. 14, 1890-1895 (1975)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-14-8-1890

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