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

Self-focusing hidden bar code

Zhiqiang Zhong, Jianping Ding, Zhou Jin, Peiying Liang, and Gao Wenqi
Appl. Opt. 41(2) 308-311 (2002)

Analog micro-optics fabrication by use of a two-dimensional binary phase-grating mask

Jinwon Sung, Heidi Hockel, and Eric G. Johnson
Opt. Lett. 30(2) 150-152 (2005)

Fabrication of subwavelength structure for improvement in light-extraction efficiency of light-emitting devices using a self-assembled pattern of block copolymer

Koji Asakawa and Akira Fujimoto
Appl. Opt. 44(34) 7475-7482 (2005)

Synthesis of diffractive optical bar codes

Steven J. Bever and Jan P. Allebach
Appl. Opt. 31(8) 1074-1082 (1992)

Frequency-narrowed diode array bar

Earl Babcock, Bien Chann, Ian A. Nelson, and Thad G. Walker
Appl. Opt. 44(15) 3098-3104 (2005)