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ProEM System Manual
Issue 3
6.5.1
Summary
Spectra-Kinetics is a powerful feature that allows a burst of subframes to be captured
with microsecond time resolution. However, careful attention must be paid to the
optical and timing considerations:
•
The rows closest to the serial register need to be illuminated. As can be seen in
Figure 58, these rows are immediately below the frame transfer area.
•
The rest of the active area must be optically masked.
•
Single trigger {Readout Per Trigger} mode allows the capture of a burst of frame
with just one trigger.
•
In multiple trigger {Shift Per Trigger} mode, the camera requires a trigger for
each "exposure-shift" cycle.
•
The highest time resolution between kinetic frames is determined by the
window (subframe) size.
•
Hardware binning is automatically applied.
6.6
Custom Modes
Custom Chip mode is available as an option for the WinX applications; {Custom Sensor}
and Custom Timing are standard {sensor-dependent} in LightField. These modes are
intended to allow data acquisition at the fastest possible rates for your camera. Custom
Chip {Custom Sensor} allows you to reduce the apparent size of the CCD array and
Custom Timing allows you to select a faster vertical shift time.
6.6.1
Custom Chip {Custom Sensor}
In addition to Binning and ROI which have been discussed previously in the manual,
there is a third way to reduce Readout Time - Custom Chip {Custom Sensor}. This
feature allows you to redefine the size of the EMCCD's active area via software. Unlike
setting a smaller Region Of Interest (ROI), which also involves reading out fewer pixels,
this mode does not incur overhead from discarding or skipping the rest of the rows.
And, unlike both Binning and ROI, Custom Chip {Custom Sensor} also relies on some
form of array masking to ensure that no light falls outside the currently set active area.
NOTE:
Custom Chip is a WinX/32 option.
Custom Sensor is standard with LightField: availability is
sensor-dependent.
See
Summary of Contents for ProEM Series
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