Photon Focus OEM-D1024E, User Manual

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LinLog
®
is controlled by up to 4 parameters (
Time1
,
Time2
,
Value1
and
Value2
).
Value1
and
Value2
correspond to the LinLog
®
voltage that is applied to the sensor. The higher the parameters
Value1 and Value2 respectively, the stronger the compression for the high light intensities. Time1
and Time2 are normalised to the exposure time. They can be set to a maximum value of 1000,
which corresponds to the exposure time.
Examples in the following sections illustrate the LinLog
®
feature.
LinLog1
In the simplest way the pixels are operated with a constant LinLog
®
voltage which defines the
knee point of the transition.This procedure has the drawback that the linear response curve
changes directly to a logarithmic curve leading to a poor grey resolution in the logarithmic
region (see Fig. 4.10).
tt
V a l u e 1
t
e x p
0
V
L i n L o g
= V a l u e 2
T i m e 1 = T i m e 2 = m a x .
= 1 0 0 0
Figure 4.9: Constant LinLog voltage in the Linlog1 mode
.
4.3 Pixel Response 23