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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 9 — Mar. 21, 2005
  • pp: 1538–1542

Photolithographic fabrication of a high-precision bar-code pattern on the surface of a sphere

Kyongtae Park, Robert A. Atkins, Henry F. Taylor, James N. Gardner, and Chung E. Lee  »View Author Affiliations


Applied Optics, Vol. 44, Issue 9, pp. 1538-1542 (2005)
http://dx.doi.org/10.1364/AO.44.001538


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Abstract

Bar-code patterns were produced upon gold-coated glass spheres 8 mm in diameter with a novel projection photolithography exposure system that included a computer-controlled rotation stage-and-shutter arrangement. The patterns extended in an equatorial band about the entire 360° periphery of the sphere. To obtain uniform thickness of the photoresist layer, we dip coated the spheres and removed the excess with an absorption pad. The widths of the bars in the pattern were in the range 21.85 ± 0.6 μm at the equator, and the relative error in the angular position of the pattern features was less than 0.025°. The patterned spheres are suitable for use in optically interrogated flying spot magnetic heading sensors.

© 2005 Optical Society of America

History
Original Manuscript: June 14, 2004
Revised Manuscript: November 8, 2004
Manuscript Accepted: November 11, 2004
Published: March 20, 2005

Citation
Kyongtae Park, Robert A. Atkins, Henry F. Taylor, James N. Gardner, and Chung E. Lee, "Photolithographic fabrication of a high-precision bar-code pattern on the surface of a sphere," Appl. Opt. 44, 1538-1542 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-9-1538

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