Accession Number : ADD004431

Title :   Emittance Calorimetric Method.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Potter,Roy F ; Stierwalt,Donald L

Report Date : 09 Aug 1977

Pagination or Media Count : 4

Abstract : A precise measurement of the absorption of weakly absorbing optical material is measured by measuring the temperature rise of the sample when light of the wavelength of interest passes through it. The temperature rise is determined by measuring the emission from the sample due to phonon absorption processes. This emission is of a much longer wavelength than the wavelength of interest. The temperature rise is measured by measuring the rate of increase of the emitted radiation power from the sample at the longer wavelength. (Author)

Descriptors :   *Patents, *Optical materials, *Absorption coefficients, *Calorimetry, Infrared windows, Laser materials, High power, Measuring instruments, Emittance, Reflectance, Transmittance, Sensitivity, Thermocouples, Temperature, Light transmission

Subject Categories : Lasers and Masers
      Infrared Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE