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Proceedings Paper

Speckle reduction in line-scan laser projectors using binary phase codes: theory and experiments
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Paper Abstract

Barker binary phase code of maximum length 13 has previously been used for speckle reduction in line-scan laser projectors, and a speckle contrast factor decreased down to 13% has been achieved. In this article, Barker-like binary phase codes of length longer than 13 are used at an intermediate image plane. It is shown by theoretical calculation that much better speckle reduction with speckle contrast factor up to 6% can be achieved by using longer binary phase codes other than the Barker code. Preliminary experimental results are also presented indictaing good speckle reduction.

Paper Details

Date Published: 13 September 2010
PDF: 7 pages
Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871P (13 September 2010); doi: 10.1117/12.869420
Show Author Affiliations
M. Nadeem Akram, Vestfold Univ. College (Norway)
Guangmin Ouyang, Vestfold Univ. College (Norway)
Wenhong Gao, Vestfold Univ. College (Norway)
Zhaomin Tong, Vestfold Univ. College (Norway)
Xuyuan Y. Chen, Vestfold Univ. College (Norway)

Published in SPIE Proceedings Vol. 7387:
Speckle 2010: Optical Metrology
Armando Albertazzi Goncalves; Guillermo H. Kaufmann, Editor(s)

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