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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 21, Iss. 1 — Jan. 1, 2004
  • pp: 104–112

Radiation characteristics of a high-emissivity cylindrical–spherical cavity with obscuration

Steven R. Meier, Richard I. Joseph, and Spiro K. Antiochos  »View Author Affiliations


JOSA A, Vol. 21, Issue 1, pp. 104-112 (2004)
http://dx.doi.org/10.1364/JOSAA.21.000104


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Abstract

We have calculated, to first order, the apparent emissivity of the bounding diffuse surfaces of a high-emissivity cylindrical–spherical cavity enclosure. Our calculations indicate that to achieve emissivities close to a perfectly absorbing blackbody cavity along the bounding surfaces of the spherical enclosure, the radius of the sphere must be equal to or greater than a factor of 4 times the cylinder radius Rs4Rc. Furthermore, to achieve emissivities approaching a blackbody cavity along the lower bounding surfaces of the cylindrical enclosure, the length of the cylinder must be a factor of 4 times greater than the radius of the cylinder L4Rc. In addition, we present the mathematical framework necessary to calculate radiant transfer within a cavity enclosure that contains obscuration. These results can be applied to the design of high-emissivity blackbody calibration cavities and to the reduction of stray light in terrestrial and spaceborne optical systems.

© 2004 Optical Society of America

OCIS Codes
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.5700) Instrumentation, measurement, and metrology : Reflection
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(160.4670) Materials : Optical materials
(220.4830) Optical design and fabrication : Systems design

History
Original Manuscript: March 24, 2003
Revised Manuscript: September 4, 2003
Manuscript Accepted: September 16, 2003
Published: January 1, 2004

Citation
Steven R. Meier, Richard I. Joseph, and Spiro K. Antiochos, "Radiation characteristics of a high-emissivity cylindrical–spherical cavity with obscuration," J. Opt. Soc. Am. A 21, 104-112 (2004)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-21-1-104

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