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Proceedings Paper

Comparison Of Harmonic Weighting, Fitting, And Crossing Points For Locating Optical Interference Fringes
Author(s): William Primak
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Paper Abstract

The problem in precisely locating a fringe in an interference pattern is that the light intensity varies so gradually in the regions of the maxima and minima. Such devices as logarithmic weighting and half-shades have been used in the past. Here, the methods of fitting the fringe intensity profile, harmonic weighting (which converts the fringe profile into a sawtooth), and using the mid-intensity crossing points (where the intensity varies most steeply) are compared, and their precisions in the presence of statistical errors are described. The implications for practical measurement are discussed.

Paper Details

Date Published: 25 November 1986
PDF: 6 pages
Proc. SPIE 0661, Optical Testing and Metrology, (25 November 1986); doi: 10.1117/12.938599
Show Author Affiliations
William Primak, Wolfe Loeb & Co (United States)

Published in SPIE Proceedings Vol. 0661:
Optical Testing and Metrology
Chander Prakash Grover, Editor(s)

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