40
•
Camera Operation
Figure 13: External Frame Rate and External Exposure Time (Trigger Width)
External Frame Rate, Programmable Exposure Time
In this mode, the frame rate is set externally with the falling edge of EXSYNC generating the
rising edge of a programmable exposure time.
Camera Features:
•
TriggerMode = On
•
ExposureMode = Timed
•
ExposureTime = 10000 (for example)
Figure 14: External Frame Rate, Programmable Exposure Time
Exposure Time
Exposure time is the amount of time that the sensor is allowed to accumulate charge before
being read. The user can set the exposure time when the
ExposureMode
feature is set to
Timed
. The limitations on the maximum exposure time are listed below:
•
External Exposure Time: 20 µs (min) to 1 second (max).
•
Internal Exposure Time: (1 / frame rate) – X
Table 8: Exposure Time Padding
Pixel Size
Value of ”X”
8 bits per pixel
50
9 bits per pixel
30
10 bits per pixel
30
Note: The maximum exposure time is dependent on the frame rate. To increase maximum
exposure time, decrease the frame rate.
Frame Time
Frame Time
Readout Time
Exposure Time
Programmable
User Exsync
FVAL
Exposure Time
Programmable
Internally-generated Exsync
Содержание FA-80-12M1H-XX-R
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