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Optics for Engineers
book

Optics for Engineers

by Charles A. DiMarzio
August 2011
Intermediate to advanced content levelIntermediate to advanced
564 pages
20h 45m
English
CRC Press
Content preview from Optics for Engineers
RADIOMETRY AND PHOTOMETRY 391
both the ¯y spectrum and the spectral response of the detector, so that the voltage reading is
directly proportional to luminous ux.
12.4.2 Power Measurement: The Integrating Sphere
In Section 12.1, we discussed integrating the radiance over solid angle and area to obtain
radiant ux (e.g., using Equations 12.7 and 12.9 in succession). In some cases, physical imple-
mentation of the integration is easy. For example, given a Gaussian laser beam with a diameter,
d
0
, the beam divergence is (4/π)(λ/d
0
), and the product of A is of the order of λ
2
.Ifthe
beam is small enough, all of the light can easily be captured by a power ...
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Publisher Resources

ISBN: 9781439807255