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Appendix D: Custom Modes
Custom Sensor and Custom Timing are standard with LightField, although both are
sensor and readout mode-dependent. These modes enable data acquisition at the
fastest possible rates for the camera. Custom Sensor allows the apparent size of the
CCD array to be reduced, while Custom Timing allows a faster vertical shift time to be
selected.
D.1
Custom Sensor
In addition to Binning and ROI (previously discussed in the manual), the Custom Sensor
feature can be used to reduce Readout Time.
NOTE:
Teledyne Princeton Instruments does not encourage users
to change these parameter settings. For most applications,
the default settings will give the best results. There are
limitations to this technique, such as requiring the careful
positioning of the light on the active section of the CCD and
darkness on the rest of it.
Custom Sensor redefines the size of the CCD’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 Sensor relies on a form of array masking to ensure that
no light falls outside the currently set active area.
The Custom Sensor pane, illustrated in
, is accessed by opening the Sensor
expander and clicking on the Custom Sensor button.
Figure D-1: Custom Sensor Pane
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