NED
UME-0031-03
Sui7440
37
4.10 Setting Gain
It is possible to adjust the gain setting of this camera (x1.3~16). This is done by
adjusting the slope of the line in the figure below. The slope becomes steeper when you
raise the gain, and saturation occurs at a lower light exposure level. On the other hand,
at a lower light level, the output increases, so the sensitivity is said to have increased.
The gain can be adjusted with the command listed in the commands table. However, if
you are using the User Pixel Correction function, gain can be automatically adjusted by
setting the output target level.
Figure 4-10-1 PGA Gain Adjustment
Gain and noise values are proportionally related.
Adjust the amount of gain in accordance with the requirements of your camera system.
Gain should be calculated according to the following formula:
G1(dB)
≒
Gain code x 0.0469
G2(multiple)
≒
10^(G1 ÷ 20)
≒
10^(Gain code x 0.002345)
＜
＜
＜
＜
example
＞
＞
＞
＞
code
G1(dB)
G2(magnification)
Sensitivity V/(lx
・
s)
54
2.5326
1.3385
67
128
6.0032
1.9960
100
162
7.5978
2.3982
120
256
12.0064
3.9840
199
332
15.5708
6.0053
300
514
24.1066
16.0446
802
Ｆｓ
Fs : Saturation Output
Gain a
Amount of Incident
Light (lx
・
s)
(a<b<c)
Gain b
Gain c
