Speckle photography techniques in white light
Abstract
The application of speckle photography for measuring refraction index gradients is described. The media, with varying refraction index, are interposed between the speckle camera and a plane surface covered by a transparent film embedded with 5 micron reflectant spheres. White light photography depicts variation in light intensity in function of the media refracting index. Convective or turbulent zones are easily recorded. The sensitivity of the method is on the order of 1 millionth cm.
- Publication:
-
Presented at 2nd Natl. Congr. on Quantum and Plasma Electron
- Pub Date:
- 1980
- Bibcode:
- 1980qpe..cong...20G
- Keywords:
-
- Gradients;
- Light (Visible Radiation);
- Photographic Measurement;
- Refractivity;
- Speckle Patterns;
- Spectra;
- Convective Flow;
- Photographic Equipment;
- Surface Roughness Effects;
- Turbulent Flow;
- Instrumentation and Photography