Applications of fiber optic pulsed photothermal radiometry

Vered Scharf*, Ophir Eyal, Abraham Katzir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Pulsed photothermal radiometry is a nondestructive technique for measurements of surface and subsurface thermal parameters of a wide variety of materials. A fiber optic pulsed photothermal radiometric system is constructed and its feasibility is demonstrated. The radiometric system includes a pulsed CO2 laser, an IR detector, and two IR transmitting silver halide optical fibers for delivering IR radiation to and from the sample. A weak laser pulse, absorbed by the sample, initially heats the sample surface. The time evolution of the transient emitted IR radiation is measured and analyzed. The results establish the feasibility of using the fiber optic pulsed photothermal radiometric system to measure coating thickness, to detect flaws, and to diagnose thermal damage in tissue. This fiber optic method would be useful for industrial and medical applications.

Original languageEnglish
Pages (from-to)2784-2790
Number of pages7
JournalOptical Engineering
Volume37
Issue number10
DOIs
StatePublished - Oct 1998

Keywords

  • Fiber optics
  • Infrared
  • Nondestructive testing
  • Photothermal methods
  • Radiometry

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