© 2016 Thorlabs Scientific Imaging34
DCx Camera Functional Description and SDK Manual
Global shutter sensor in trigger mode
* Optional flash function. The start time and duration are defined by the flash delay and duration
parameters (see also Camera settings: I/O).
Rolling shutter
With the rolling shutter method, the pixel rows are reset and exposed one row after another. At the
end of the exposure, the lines are read out sequentially. As this results in a time delay between the
exposure of the first and the last sensor rows, captured images of moving objects are distorted.
Example for the rolling shutter effect with a moving car
To counteract this effect, the DCx Camera software provides a global flash window where you set
the time by which flash activation is delayed. You can also specify the flash duration. This allows
implementing a global flash functionality which exposes all rows of a rolling shutter sensor
simultaneously.
Rolling shutter sensors offer a higher pixel density compared to global shutter CMOS sensors. The
rolling shutter system is used in DCC Cameras with high-resolution CMOS sensors.
Note
Some CMOS senors with global shutter can be operated also with rolling shutter. The operation in
the rolling shutter mode is used to reduce the image noise. This function is only supported from the
camera models DCC1240x/DCC3240x.
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