Accession Number : ADA140562

Title :   Infrared Photothermal Radiometry.

Descriptive Note : Technical rept.,

Corporate Author : IBM RESEARCH LAB SAN JOSE CA

Personal Author(s) : Tam,A C

PDF Url : ADA140562

Report Date : 10 Apr 1984

Pagination or Media Count : 17

Abstract : Infrared Photothermal Radiometry (IPTR) is a sensitive technique for noncontract spectroscopy and inspection. A modulated beam of photons (or other particles) produces temperature transients in a sample; the corresponding transients in the infrared thermal radiation emitted from the sample are analyzed. This can provide absolute absorption coefficients, as well as information on thermal diffusivity, layered structure, and dimensions. Variations of IPTR are possible with continuously-modulated or pulsed excitation, and with transmission or back-scattering detection. These variations are reviewed. The recent technique of pulsed IPTR with back-scattering detection is described in more detail, and some important single-ended remote sensing applications are discussed. (Author)

Descriptors :   *Infrared spectroscopy, *Radiometry, *Infrared radiation, *Photothermal properties, Thermal radiation, Methodology, Sensitivity, Absorption coefficients, Laser applications, Excitation, Pulses, Diffusivity, Remote detectors, Photons

Subject Categories : Test Facilities, Equipment and Methods
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE