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Proceedings Paper

Theoretical considerations in radiometer design
Author(s): Jose G. Suarez-Romero; Roberto Salas-Zuñiga
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Paper Abstract

This work considers typical radiometers that measure the radiance of sources or of some surface (due to reflection). The most important thing in a radiometer is its optical cavity, which defines the solid angle of measurement. In case of instruments that use lenses, lens diameter and focal length define the solid angle. Radiometer design takes care that the solid angle subtended by the optical cavity be minor that the solid angle subtended by the source to be measured, however no considerations are taken on the length of the cavity. In this work it is discussed theoretical limitation in the design of radiometers, particularly the influence of radiometer length (the cavity length). Theory of partial coherence is used to obtain the instrument function and to show how the length of the instrument affects measurements.

Paper Details

Date Published: 25 September 2013
PDF: 8 pages
Proc. SPIE 8841, Current Developments in Lens Design and Optical Engineering XIV, 88411F (25 September 2013); doi: 10.1117/12.2025308
Show Author Affiliations
Jose G. Suarez-Romero, Instituto Tecnológico de Querétaro (Mexico)
Roberto Salas-Zuñiga, Ctr. de Ingeniería y Tecnología S.C. (Mexico)


Published in SPIE Proceedings Vol. 8841:
Current Developments in Lens Design and Optical Engineering XIV
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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