title: Evaluation of effective emissivities of nonisothermal cavities.
abstract: Local effective spectral and total emissivities of nonisothermal cavities having diffuse surfaces are evaluated. The effective emissivity of the cavity wall around the half-depth of a cylinder is little affected by a linear decrease or increase of temperature along the cavity axis because of a compensation effect. The nonisothermal effect on the integrated cavity emissivity changes considerably with cavity geometry for a given temperature distribution.
authors.affiliation: National Research Laboratory of Metrology, 1-1-4, Umezono, Sakura-mura, Niihari-gun, Ibaraki 305, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ohwada