A Sensitive Calorimetric Method for Scanning Measurements of the Optical Absorption of Metals and Alloys
- 1 November 1971
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 42 (11), 1596-1601
- https://doi.org/10.1063/1.1684947
Abstract
We have developed a sensitive calorimetric method for measuring the absorptivity of metals in the visible and infrared. The short thermal time constant of the system, typically 25 msec, has allowed us to use phase sensitive detection and continuous wavelength scanning. The absolute accuracy of this method was five times better than the best accuracy obtained in reflectivity measurements. The system has also been used to measure the difference between the absorptivities of pure and dilute alloy samples.Keywords
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