26
8.1.3 Exposure Time
On exposure of the sensor, the inclination of photons produces a charge separation on
the semiconductors of the pixels. This results in a voltage difference, which is used for
signal extraction.
Light
Photon
Pixel
Charge Carrier
The signal strength is influenced by the incoming amount of photons. It can be increased
by increasing the
exposure time (t
exposure
).
On Baumer SXG cameras, the
exposure time can be set within the following ranges (step
size 1μsec):
Camera Type
t
exposure
min
t
exposure
max
Monochrome
SXG10
10 μsec
1 sec
SXG20
10 μsec
1 sec
SXG21
10 μsec
1 sec
SXG40
10 μsec
1 sec
SXG80
10 μsec
1 sec
Color
SXG10c
10 μsec
1 sec
SXG20c
10 μsec
1 sec
SXG21c
10 μsec
1 sec
SXG40c
10 μsec
1 sec
SXG80c
10 μsec
1 sec
Look-Up-Table
8.1.4
The
Look-Up-Table (LUT) is employed on Baumer monochrome cameras. It contains 2
12
(4096) values for the available levels of gray. These values can be adjusted by the user.
Figure 19 ►
Incidence of light causes
charge separation on
the semiconductors of
the sensor.
Содержание SXG
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