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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
138 OPTICS FOR ENGINEERS
where
τ
pass
is less than, but close to, 1
τ
block
is more than, but close to, 0
We can call 1
τ
pass
2
the insertion loss and
|
τ
block
|
2
the extinction. Alternatively, we can
dene the extinction ratio as
τ
pass
2
/
|
τ
block
|
2
. A good insertion loss might be a few percent
or even less, and a good extinction might be 10
5
. Specic devices will be discussed later.
6.2.2 Wave Plate
Suppose that in Equation 6.20 we change the values of τ to complex numbers such that both
have unit magnitude but their phases are different. This will cause one component of the polar-
ization to be retarded relative to the other. Later, we will see that birefringent materials can be
used to achieve this condition. For now, let us consider two examples. First, ...
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Publisher Resources

ISBN: 9781439807255