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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 17, Iss. 23 — Dec. 1, 1978
  • pp: 3827–3836

Laser heterodyne apparatus for roughness measurements of polished surfaces

S. Hård and O. Nilsson  »View Author Affiliations


Applied Optics, Vol. 17, Issue 23, pp. 3827-3836 (1978)
http://dx.doi.org/10.1364/AO.17.003827


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Abstract

A laser heterodyne apparatus for roughness measurements of polished surfaces has been developed. A new principle for generation of the local-oscillator light beam is introduced. Important features of the apparatus are: very high sensitivity (Ra values less than 0.1 nm can readily be measured), immunity against stray light of all kinds, noncritical aligning (insensitive to vibrations), simple configuration, microprocessor output unit for digital presentation of characteristic surface measures. A quantitative theory of the complete apparatus is presented together with experimental confirmation by comparisons with stylus and multiple interference measurements.

© 1978 Optical Society of America

History
Original Manuscript: April 10, 1978
Published: December 1, 1978

Citation
S. Hård and O. Nilsson, "Laser heterodyne apparatus for roughness measurements of polished surfaces," Appl. Opt. 17, 3827-3836 (1978)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-17-23-3827

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