Theoretical considerations in radiometer design

Jose G. Suarez-Romero; Roberto Salas-Zuñiga

doi:10.1117/12.2025308

25 September 2013 Theoretical considerations in radiometer design

Jose G. Suarez-Romero, Roberto Salas-Zuñiga

Proceedings Volume 8841, Current Developments in Lens Design and Optical Engineering XIV; 88411F (2013) https://doi.org/10.1117/12.2025308
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

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.

Citation Download Citation

Jose G. Suarez-Romero and Roberto Salas-Zuñiga "Theoretical considerations in radiometer design", Proc. SPIE 8841, Current Developments in Lens Design and Optical Engineering XIV, 88411F (25 September 2013); https://doi.org/10.1117/12.2025308

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