Abstract

The emissivity ∊_c of cylindrical cavities with different bases (flat, perpendicular to the axis; flat, inclined to the axis; conical) is derived from measurements of the cavity reflectance ρ_c. A general formula for the calclation of ρ_c = 1 − ∊_c is given, which holds for high values of the ratio length L of the cylinder to radius R of the cylinder. For a flat base perpendicular to the axis only the value of the reflectance ρ₀ of the wall material is needed; in both other cases one must refer to the measurements.

© 1971 Optical Society of America

Reflectance Measurements on Cavity Radiators

O. C. Jones and C. Forno
Appl. Opt. 10(12) 2644-2650 (1971)

Emissivities of diffuse cavities, II: Isothermal and nonisothermal cylindro-cones

R. E. Bedford and C. K. Ma
J. Opt. Soc. Am. 65(5) 565-572 (1975)

Evaluation of effective emissivities of nonisothermal cavities

Yoshiko Ohwada
Appl. Opt. 22(15) 2322-2325 (1983)

Calculation of the directional emissivities of cavities by the Monte Carlo method

A. Ono
J. Opt. Soc. Am. 70(5) 547-554 (1980)

Spectral effective emissivities of nonisothermal cavities calculated by the Monte Carlo method

V. I. Sapritsky and A. V. Prokhorov
Appl. Opt. 34(25) 5645-5652 (1995)