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Chapter 9: Non-Destructive Readout
Typically, data readout operations are destructive in nature. That is, once the collected data
are read, a cleaning operation is initiated, and the data are cleared from the FPA.
In addition to standard readout operation, NIRvana-LN systems support Non-Destructive
Readout (NDRO.) NDRO provides the ability to read data collected without initiating a
clean operation making it possible to monitor an experiment’s progress without
destroying/affecting currently collected data. This is particularly useful when performing
experiments requiring extremely long exposure times, sometimes spanning hours.
NOTE:
NDRO is only supported within LightField 4.8 and later.
WinX/32 does not support NDRO.
9.1 Configuration
NDRO is enabled and configured within the
Readout
expander in LightField. See
Figure 9-1 .
Figure 9-1: Typical LightField Readout Expander
When Enable NDRO is checked/enabled, two additional configuration settings are
displayed:
• NDRO Period
;
This controls the rate of exposure progress via non-destructive readout.
Valid values are 1 … 33521 seconds in 1-second increments.
• Save NDRO Frames
.
When checked, frames that have been read out in a non-destructive manner are
saved in addition to those read out normally.
See Figure 9-2 .
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