Photothermal measurement of optical surface absorption using strain transducers
Abstract
We discuss the measurement of small optical surface absorption coefficients. A demonstration experiment was performed using a metallurgical strain gauge to measure 488 nm absorption on the surface of a glass plate. A strain of 10 to the minus 8th power resulted from absorption of 0.3 watts. The results are interpreted and the sensitivity of a proposed fiber optic strain gauge is discussed.
- Publication:
-
Naval Research Lab. Report
- Pub Date:
- September 1981
- Bibcode:
- 1981nrl..reptT....L
- Keywords:
-
- Absorptivity;
- Photoacoustic Spectroscopy;
- Phototropism;
- Surface Properties;
- Fiber Optics;
- Strain Gages;
- Transducers;
- Instrumentation and Photography