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

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G r e y
V a l u e
L i g h t I n t e n s i t y
0 %
1 0 0 %
L i n e a r
R e s p o n s e
S a t u r a t i o n
W e a k c o m p r e s s i o n
V a l u e 2
S t r o n g c o m p r e s s i o n
V a l u e 1
R e s u l t i n g L i n l o g
R e s p o n s e
Figure 4.8: Resulting LinLog2 response curve
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 25