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Optical Engineering

Pointwise automatic analysis of speckle photographs
Author(s): Junjiang Zhang; Peimao Sun; Jingnian Chen; Boju Ding
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Paper Abstract

An automatic system for analyzing specklegrams point by point is described. A new method of evaluating Young's fringes based on making a TV camera scan both horizontally and vertically is proposed. Tracking, filtering, and edge lo cating techniques are developed to acquire fringe data. Experiments show that Young's fringes can be determined with an accuracy of 1% in spacing and 1° in orientation, and the displacement can be found with an accuracy of 1 μm in the range 20 to 100 μm.

Paper Details

Date Published: 1 April 1991
PDF: 4 pages
Opt. Eng. 30(4) doi: 10.1117/12.55821
Published in: Optical Engineering Volume 30, Issue 4
Show Author Affiliations
Junjiang Zhang, Leica Heerbrugg Ltd. (Switzerland)
Peimao Sun, Tsinghua Univ. (China)
Jingnian Chen
Boju Ding, Tsinghua Univ. (China)


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