Photon Focus MV-D1024E-3D01-160, User Manual

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4 Functionality
0
50
100
150
200
250
300
Typical LinLog1 Response Curve − Varying Parameter Value1
Illumination Intensity
Output grey level (8 bit) [DN]
V1 = 15
V1 = 16
V1 = 17
V1 = 18
V1 = 19
Time1=1000, Time2=1000, Value2=Value1
Figure 4.10: Response curve for different LinLog settings in LinLog1 mode
LinLog2
To get more grey resolution in the LinLog
®
mode, the LinLog2 procedure was developed. In
LinLog2 mode a switching between two different logarithmic compressions occurs during the
exposure time (see Fig. 4.11). The exposure starts with strong compression with a high
LinLog
®
voltage ( Value1 ). At Time1 the LinLog
®
voltage is switched to a lower voltage resulting in
a weaker compression. This procedure gives a LinLog
®
response curve with more grey
resolution. Fig. 4.12 and Fig. 4.13 show how the response curve is controlled by the three
parameters
Value1
,
Value2
and the LinLog
®
time
Time1
.
Settings in LinLog2 mode, enable a fine tuning of the slope in the logarithmic
region.
tt
V a l u e 1
V a l u e 2
T i m e 1
t
e x p
0
V
L i n L o g
T i m e 2 = m a x .
= 1 0 0 0
T i m e 1
Figure 4.11: Voltage switching in the Linlog2 mode
.
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