On the interpretation of shadow-moire fringes
Abstract
Shadow moire is presented as one of the methods used to determine loci of constant height in curved surfaces (isotathmics). A general expression to interpret the fringes is derived taking into consideration possible rotations and translation of the grating. A discussion of the influence of such rotations and translation on the sensitivity of the response is also presented. Furthermore, simplified equations are obtained for particular cases of practical interest. An example of application to the case of an inverted perforated tube is shown.
- Publication:
-
Experimental Mechanics
- Pub Date:
- June 1978
- Bibcode:
- 1978ExM....18..221B
- Keywords:
-
- Gratings (Spectra);
- Moire Effects;
- Perforated Shells;
- Photointerpretation;
- Shadowgraph Photography;
- Surface Geometry;
- Point Sources;
- Rotating Bodies;
- Spheres;
- Translational Motion;
- Instrumentation and Photography