There’s a good article explaining the difference between these exposure modes here – http://alliedscientificpro.com/rolling-shutter-or-global-shutter-modes-for-cmos-cameras/?goback=.gde_1628247_member_202082300
Bottom line for any quantitative work is that rolling shutter may introduce a source of temporal error. You can consider a rolling shutter to a flatbed scanner in it’s readout. So, if an object is moving while the image is being scanned, the object will slide across the formed image. This scan occurs at high speed. Depending on the camera, it could be 5mS or 30mS. The important consideration is that if you are using the camera to measure things that move, if the object is in motion at some speed greater say 1 pixel per 100mS, it’s important not to use rolling shutter. Another place where this is important is behind spinning disk confocal systems.
-Austin
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2 responses to “Rolling vs. Global Shutter modes in CMOS cameras”
We usually use an AOTF for fast shuttering anyway, and we’ve had good results using the AOTF to confine illumination to the interval where all the lines are exposing simultaneously.
This seems like an excellent solution. Thanks Andrew! d imagine mode locking stage motion to the shutter and using the sensor in a pseudo TDI mode, I guess time will tell!