Photothermal Measurement of Optical Surface Absorption Using Strain Transducers

Photothermal Measurement of Optical Surface Absorption Using Strain Transducers

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 resu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Leslie,D H, Trusty,G L
Format: Report
Sprache:eng
Schlagworte:
ABSORPTION
COEFFICIENTS
Electric Power Production and Distribution
FIBER OPTICS
MEASUREMENT
METALLURGY
OPTICAL PROPERTIES
Optoacoustic spectroscopy
PE61153N
Photoacoustics
PHOTOTHERMAL ENERGY
STRAIN GAGES
SURFACES
Test Facilities, Equipment and Methods
TRANSDUCERS
WU119
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Beschreibung
Zusammenfassung: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.