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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
44-6 Optical
from the ideal, and the QE characterizes the ideality of the sensor. e QE of a photodiode is the ratio of
th
e
c
harge
p
airs
g
enerated
to t
he
i
ncident
p
hotons:
η
υ
=
I
p
/
/
q
P h
i
(44.5)
where
P
i
is the optical power incident on the photodiode
hυ
i
s
t
he
e
nergy
o
f
t
he
p
hotons
In
th
e
da
ys
of yo
re,
be
fore
LE
Ds
an
d
ca
librated
ph
otodiodes,
li
ght
in
tensity
wa
s
me
asured
wi
th
po
wer
me
ters
an
d
bo
lometers
. Wit
h
th
ese
de
vices,
th
e
me
asured
re
sponse
is pr
oportional
to th
e
en
ergy
of th
e
ph
otons,
as we
ll
as th
e
nu
mber
of ph
otons
. e
refore,
th
e
re
sponsivity,
R, is th
e
ra
tio
of th
e
ph
otocurrent
to t
he
i
ncident
o
ptical
p
ower
(
A/W):
R
I
P
= =
p
i
η
υ
q
h
(44.6)
Rea
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Publisher Resources

ISBN: 9781439848913