Lecture 10: Bolometers - Leiden Observatory
Lecture 10: Bolometers - Leiden Observatory
Lecture 10: Bolometers - Leiden Observatory
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etermining responsivity at V0<br />
The resistance at the point V0 is:<br />
Z = R<br />
The local slope is:<br />
If you now rewrite Z as follows.....<br />
Z = dV<br />
dI<br />
Detection of Light: <strong>Lecture</strong> <strong>10</strong><br />
d(log P )<br />
d(log R)<br />
H +1<br />
H 1<br />
= R d(log V )<br />
d(log I)<br />
= 1<br />
I 2<br />
R0 = V0/I0<br />
(dI/dV )0 =1/Z0<br />
= R<br />
dP<br />
dR<br />
so H = Z + R<br />
Z R<br />
d(log P )<br />
d(log R) +1<br />
d(log P )<br />
d(log R) 1<br />
...we can now find an expression for d(log P)/d (log R):<br />
= 1<br />
I 2<br />
G = P<br />
T<br />
dP<br />
dT<br />
dT<br />
dR =<br />
(T )= 1<br />
R<br />
G<br />
(T )I 2 R<br />
dR<br />
dT<br />
= G<br />
(T )P<br />
= H<br />
P = V ⇥ I = I 2 R<br />
Z and R can be measured, so we can get<br />
H, then back to determine G and a(T)
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