Abstract

Local, hemispherical, effective emissivities and integrated cavity emissivities have been computed for isothermal and nonisothermal diffuse conical and cylindrical cavities having lids with circular apertures. The local emissivities of the walls increase rapidly with decreasing aperture diameter and are moderately insensitive to the value of the lid emissivity. The integrated emissivity increases or decreases with the distance of the detector from the cavity; the direction of the change depends upon the cavity geometry. For a nonisothermal cavity, the effective spectral emissivity changes substantially with both wavelength and cavity temperature; consequently, it is in general significantly different from the effective total emissivity.

© 1974 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
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)

Emissivities of diffuse cavities. 4: Isothermal and nonisothermal cylindro-inner-cones

Ronald E. Bedford, C. K. Ma, Zaixiang Chu, Yuxing Sun, and Shouren Chen
Appl. Opt. 24(18) 2971-2980 (1985)

Precise calculation of effective emissivity of a diffuse cylindro-inner-cone with a specular lid

Zaixiang Chu, Yuxing Sun, Ronald E. Bedford, and C. K. Ma
Appl. Opt. 25(23) 4343-4348 (1986)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (25)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription