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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 26, Iss. 12 — Jun. 15, 1987
  • pp: 2364–2375

Diffraction analysis of rough reflective surfaces

Karen J. Allardyce and Nicholas George  »View Author Affiliations


Applied Optics, Vol. 26, Issue 12, pp. 2364-2375 (1987)
http://dx.doi.org/10.1364/AO.26.002364


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Abstract

For ground metallic samples illuminated at various angles of incidence, optical transform patterns are determined theoretically and then verified both experimentally and using computer simulations. Surface roughness in the range from 0.025 to 3.2 μm is studied and means for categorizing surface roughness automatically are established. A noncontact optical method which provides a real-time display of Fourier transforms is compared to a computer-aided technique that models the optical system using profilometer data as an input. Also, the Fourier transforms for a periodic phase-reflection surface are presented at three angles of illumination to illustrate the effective increase in grating frequency and apparent decrease in roughness as the illumination angle is increased. Excellent results are obtained in accurately measuring roughened flat metallic surfaces remotely.

© 1987 Optical Society of America

History
Original Manuscript: December 2, 1986
Published: June 15, 1987

Citation
Karen J. Allardyce and Nicholas George, "Diffraction analysis of rough reflective surfaces," Appl. Opt. 26, 2364-2375 (1987)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-26-12-2364


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References

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