THORLABS DCC1645C User Manual

379Camera Basics
© 2010 Thorlabs
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.
To counteract this effect, the DCx 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 DCx cameras with high-resolution CMOS sensors.
Figure 77 Rolling shutter sensor in live mode
Figure 78 Rolling shutter sensor in live mode with global flash window
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Optional flash function. The start time and duration are defined by the Flash delay and Duration
parameters (see also Camera Settings: I/O ).
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THORLABS DCC1645C Specifications

General

Brand	THORLABS
Model	DCC1645C
Category	Security Camera
Language	English