3.5
Sensor Shutter Modes
Cameras can be operated in two shutter modes, Rolling Shutter or Global Reset Release. The Rolling Shutter mode is used if the camera
is operated in free-run mode. If the camera is triggered, either by hardware trigger or through software, the sensor uses the Global Reset
Release mode.
3.5.1
Global Reset Release Mode
•
Global reset of all photo diodes
•
Integration stage
Transfer, conversion and readout line by line starts at the end of the integration of the first line. Not transferred line stays in integration
stage until readout of particular line starts. This leads to different exposure time for individual lines. Each next line has exposure longer by
readout of one line.
Figure 71: global reset release mode - schematic
Because of the longer exposure of the lower lines they may be show increased blurring if the object moves. To freeze the motion, a flash
may be used. In contrast to rolling shutter mode the flash strobe does not need to be delayed.
Figure 72: global reset release mode - image horizontally moved object
Figure 73: global reset release mode with flash - schematic
XIMEA Technical Manual, Version: v240108
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