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Article
Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials
Iowa State University Patents
  • John F. McClelland, Iowa State University
  • Roger W. Jones, Iowa State University
Document Type
Patent
Publication Date
3-2-1993
Abstract

A method and apparatus for enabling analysis of a flowable material enclosed in a transport system having an infrared transparent wall portion. A temperature differential is transiently generated between a thin surface layer portion of the material and a lower or deeper portion of the material sufficient to alter the thermal infrared emission spectrum of the material from the black-body thermal infrared emission spectrum of the material, and the altered thermal infrared emission spectrum is detected through the infrared transparent portion of the transport system while the altered thermal infrared emission spectrum is sufficiently free of self-absorption by the material of emitted infrared radiation. The detection is effected prior to the temperature differential propagating into the lower or deeper portion of the material to an extent such that the altered thermal infrared emission spectrum is no longer sufficiently free of self-absorption by the material of emitted infrared radiation. By such detection, the detected altered thermal infrared emission spectrum is indicative of characteristics relating to molecular composition of the material.

Patent Number
US 5,191,215
ISURF Reference Number

01025

Assignee
Iowa State University Research Foundation, Inc.,
Application Number
US 07/749,186
Date Filed
8-23-1991
Language
en
Date Available
2013-09-17
File Format
application/pdf
Citation Information
John F. McClelland and Roger W. Jones. "Apparatus and method for transient thermal infrared spectrometry of flowable enclosed materials" (1993)
Available at: http://works.bepress.com/roger_jones/2/