Teledyne Princeton Instruments PI-MAX 3, System Manual

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Chapter 12: LightField and Dual Image
Feature (DIF)
The purpose of PI-MAX3 DIF is to acquire a pair of gated images in rapid succession.
The time between frames can be as short as 450 ns. The second image will have some
remnants from the first image due to the longer persistence of the P46 phosphor.
Exposure times can be as short as 2.5 ns.The DIF capability is ideally suited to capturing
rapidly evolving events. These experiments fall into two broadly applicable categories:
• Single Trigger;
Single trigger experiments involve a single impulse event that evolves over time
such as a laser-induced plasma or luminescence decay.
• Dual Trigger.
Dual trigger experiments involve two impulses separated in time such as double
laser pulse velocimetry measurements.
12.1 Requirements
For DIF operation, the PI-MAX3 must use an interline CCD. On the Readout expander,
Readout Mode must be configured to DIF. See
Figure 12-1 .
Figure 12-1: Typical Readout Expander
Additionally, the number of frames, which is configured on the Common Acquisitions
Setting expander, must be a multiple of 2. See
Figure 12-2 .
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