New method for compensating and measuring any motion of three-dimensional objects in holographic interferometry
Abstract
A method to correct a general displacement (three translations and three rotations) is presented. Tests were done by real time and by double exposure holographic interferometry. The diffuse test object was subject to in-plane translations of 5 mm, out of plane translation of 1 mm, and rotations. With these amplitudes no interference fringes are visible but compensation is possible. Interference fringes progressively appear and finally the infinite fringe is obtained. The method used with a computer should allow the measurement of the different components of the motion even if its amplitude is greater than the dimensions of the object.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- July 1985
- Bibcode:
- 1985STIN...8533474S
- Keywords:
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- Displacement Measurement;
- Holographic Interferometry;
- Image Motion Compensation;
- Optical Measuring Instruments;
- Three Dimensional Motion;
- Diffraction Patterns;
- Holography;
- Rotation;
- Wave Front Reconstruction;
- Instrumentation and Photography