Overview Of Global Reset Release (Grr) Exposures - Teledyne m640 User Manual

Overview of Global Reset Release (GRR) Exposures

Referring to the following graphic:
All sensor lines start integrating at the same time, therefore GRR mode is also known as Global
•
Start Mode.
The first sensor line (line 1) only is exposed for the programmed time integration period.
•
As mentioned previously, the sensor design uses a shared line readout circuit. Therefore again,
•
only a single line of pixel data can be readout at any given time.
With each sensor line starting integration at once, each following line's exposure is increased by
•
the readout time required by the previous row.
In a well-lit environment with static objects, there is a visible exposure increase from the top
•
sensor row to the bottom sensor row.
• And again, with moving objects in a well-lit environment, there is motion blurring from top to
bottom.
• Therefore as described previously, flash lighting in a dark environment is used to freeze motion.
The flash period matches the integration period for line 1. The increasing exposures for the
other sensor lines will not be visible without any other illumination source.
• Use a Genie Nano output signal for flash control as described above.
44 • Genie Nano Series Overview
Nano Series GigE Vision Camera