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PI-MAX2 DIF Camera
Princeton Instruments 7 of 8 May 26, 2004
E:\Ma nuals\Syst ems\PI-MAX\PI-M AX2 DIF Ca mera.doc
the phosphor emission to drop to 10% of its peak value. The decay is not a
simple single exponential; even after 100 µs there may be 1% or more of the first
image on the phosphor screen. It is usually possible to subtract a percentage of
the first image from the second image to remove the residual image. If this is not
possible, there are intensifiers with P47 phosphor, which is an order of magnitude
faster than P46.
• The software uses the Shutter Compensation Time to determine how long to wait
after the gate pulse to shift the image. This value can be adjusted in the Hardware
Setup dialog. If there is some residual image from the first frame in the second
frame, simply increase the Shutter Compensation Time to allow the phosphor
more time to decay before shifting the image. If residual image is not an issue,
then Shutter Compensation Time can be shortened to decrease the time between
the two DIF images.