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Retiga 3000 USER MANUAL
Clearing Mode
When the camera does not expose and read out images simultaneously, it is in Non-Overlap mode. Non-
Overlap mode is set by choosing “Pre-Exposure Clearing” for the clearing mode of the camera. This allows
a clear before each exposure. The following waveforms show how Non-Overlap mode functions. The main
benefit of Non-Overlap mode is that there are no limitations imposed upon the exposure time, and the set
exposure time is the actual exposure time. The tradeoff for this accuracy is the frame rate, as each frame must
be completely read out before beginning the next exposure.
When the camera is able to expose and read out images simultaneously, it is in Overlap mode. Overlap mode is
set by choosing “Pre-Sequence Clearing” for the clearing mode of the camera. This allows one clear before the
imaging sequence starts. The following waveforms show how Overlap mode functions. When using Overlap
mode, the frame rate is higher as compared to Non-Overlap mode and provides the ability to continuously
image. However, since exposure and readout occur simultaneously, the minimum exposure time is dependent
on the time taken to complete readout. As such, excluding the first frame, any exposure time smaller than the
readout time defaults to an exposure duration equal to the readout time.
Summary of Contents for Retiga 3000
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