36
9.1.3 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 inuenced by the incoming amount of photons. It can be increased
by increasing the exposure time (t
exposure
).
On Baumer CX cameras, the exposure time can be set within the following ranges (step
size 1μsec):
9.1.3.1 VCXG
Camera Type t
exposure
min t
exposure
max
Monochrome
VCXG-53M 20 μsec 1 sec
Color
VCXG-53C 20 μsec 1 sec
9.1.3.2 VCXU
Camera Type t
exposure
min t
exposure
max
Monochrome
VCXU-23M 45 μsec 60 sec
VCXU-50M 45 μsec 60 sec
Color
VCXU-23C 45 μsec 60 sec
VCXU-50C 45 μsec 60 sec
Figure13►
Incidence of light
causes charge separa-
tion on the semiconduc-
tors of the sensor.