Paper Title:
Measurement Method for Micro-Cavity Based on Improved MAP Algorithm
  Abstract

In order to improve the measurement precision, an improved MAP algorithm is proposed to increase the edge aiming precision in this paper. The algorithm breaks the limitation of degenerated model, takes two actual factors into account, one is the distortion caused by motion, which solved by Huber-Markov random filed in the improved MAP algorithm, and the other is curvature of field, which solved by Delaunay triangle method. The algorithm can restore the high-frequency information of image, keep the edge character of image, and increase the aiming precision of the edge during the measurement. The experiments show that the uncertainty of location for the image captured in the measurement can be improved three folds, and the repeatability uncertain is less then 0.8µm when the diameter of φ0.2mm hole is measured using the proposed MAP algorithm and length-measuring interferometer together.

  Info
Periodical
Key Engineering Materials (Volumes 381-382)
Edited by
Wei Gao, Yasuhiro Takaya, Yongsheng Gao and Michael Krystek
Pages
191-194
DOI
10.4028/www.scientific.net/KEM.381-382.191
Citation
J. W. Cui, J. B. Tan, Q. Shi, "Measurement Method for Micro-Cavity Based on Improved MAP Algorithm", Key Engineering Materials, Vols. 381-382, pp. 191-194, 2008
Online since
June 2008
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Price
$32.00
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