Page 236 - Phase Space Optics Fundamentals and Applications

CHAPTER7

Radiometry, Wave

Optics, and Spatial

Coherence

Arvind S. Marathay
College of Optical Sciences, University of Arizona, Tucson, Arizona, USA

John F. McCalmont
Air Force Research Laboratory, Sensors Directorate,
Wright-Patterson AFB, Ohio, USA

David B. Pollock
Center for Applied Optics, University of Alabama, Huntsville, Alabama, USA

7.1 Introduction
Radiometry is the science of measurement or detection of radia-
tion. It has a long history, starting from the works of Bouguer (1760)
and Lambert. It is widely used today. The ideas and concepts of this
science are based on geometrical or ray optics. However, radiation
is an electromagnetic wave. Waves diffract and have states of par-
tial coherence and polarization. Therefore, it is important to include
the wave nature of radiation and formulate radiometry in the frame-
work of wave theory. We refer to radiometry based on ray theory as
conventional radiometry and that based on wave theory as generalized
radiometry.
Section 7.2 reviews conventional radiometry and defines key ra-
diometric quantities. Section 7.3 discusses the unique radiometric

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