
Introduction to radiometry
and photometry
B
ANSi/IESNA RP-16,
Nomencla-
ture and Definitions for Illumi-
nating Engineering.
CIE N ~ 17 (E-1.1),
International
Lighting Vocabulary
(Vienna,
Austria: Commission Internatio-
nale de L'Eclairage).
The domain of
radiometry
involves optical power and
its spatial and angular distributions.
Photometry
is, in
essence, radiometry weighted by the spectral response
of vision. These fields involve several subtle concepts,
masked by a bewildering array of symbols and units.
I strive to sort out some of the confusion, and make
some suggestions concerning units and nomenclature. ...