Given the ability of CCD and some CMOS sensors to simultaneously readout an image while exposing the next image, this allows for a relatively short time between two images, given the camera’s exposure time setting is equal to or greater than the sensor readout time.
The minimum time between exposures value can be useful for particle image velocimetry (PIV) applications, where two images are taken in rapid succession to measure the speed of a moving object.
Read the full application note here: