Systematic errors of a projection-moire contouring system

Andrew H. Fagg; Bryan S. Hales; H. Philip Stahl

doi:10.1117/12.139234

15 December 1992 Systematic errors of a projection-moire contouring system

Andrew H. Fagg, Bryan S. Hales, H. Philip Stahl

Proceedings Volume 1776, Interferometry: Surface Characterization and Testing; (1992) https://doi.org/10.1117/12.139234
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Projection moire techniques are useful tools for the determination of surface contour features. They can provide interferometric type fringe patterns showing regions of equal height on the surface. The difference between moire and interferometry appears in the spacing of the equal height contours lines. In an interferometric fringe pattern, the height difference between consecutive fringes is equal to the wavelength of the illumination source and is a constant over the entire pattern. For a projection moire contour pattern the height difference between consecutive fringes is determined by illumination geometry parameters and is not constant; it changes as a function of the object's out of plane height. This variation in fringe spacing causes a misrepresentation of the surface's shape if the pattern is analyzed as a traditional interferogram. This paper discusses the types of aberrations generated by this process and the dependence of aberrations on the geometry of the object.

Citation Download Citation

Andrew H. Fagg, Bryan S. Hales, and H. Philip Stahl "Systematic errors of a projection-moire contouring system", Proc. SPIE 1776, Interferometry: Surface Characterization and Testing, (15 December 1992); https://doi.org/10.1117/12.139234

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available