Range determination and evaluation of laser speckle interferometry
Abstract
The objective of the effort was to determine the range of laser speckle interferometry. An XP-250 epoxy E-glass specimen was illuminated by an optical process utilizing an argon laser as a coherent light source. The displacement was achieved by angular rotation about a reference point. Geometric and trigonometric functions were used to analytically determine magnitudes and directions of displacement. The optical setups and a description of the computer system to analyze the interferogram is also presented. An analytical-experimental comparison of displacements and rotation angle is also included. A statistical analysis including standard deviation and coefficient of variation was utilized.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- February 1982
- Bibcode:
- 1982STIN...8326071V
- Keywords:
-
- Displacement Measurement;
- Laser Interferometry;
- Range (Extremes);
- Speckle Patterns;
- Accuracy;
- Argon Lasers;
- Data Processing;
- Distance;
- E Glass;
- Evaluation;
- Nondestructive Tests;
- Lasers and Masers