Teledyne Princeton Instruments Lansis, Системное руководство

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40 Lansis
®
System Manual Issue 1
EAR99 Technology Subject to Restrictions Contained on the Cover Page.
For example, when acquiring one frame of dark data to generate the subtractable
pattern, the dark pattern readout noise will be ~1.414

N
R
, which is an increase of ~41%
over the baseline readout noise. This value is calculated as follows:
Refer to Table 7-1 for typical noise penalty figures as a percentage of readout noise, N
R
.
Table 7-1: Readout Noise Penalty vs Number of Acquired Frames
Number of Acquired Frames
(F)
Noise Penalty
a
a. Expressed as a percentage of

R
1 41%
4 12%
8 6%
16 3%
N
RT
N
R
2
N
R
2
F
--------- + =
N
R
2
N
R
2
F
--------- + =
N
R
2
N
R
2
1
---------
+ =
2 N
R
2
=
1.414 N
R
=