THORLABS WFS Series, Operation Manual

Page: 54 / 157

© 2007-2012 Thorlabs GmbH
51 Operating Instruction
the automatic brightness control is disabled. Improperly manual camera settings will
lead to low or saturated peak intensities or saturation. Prevent both by proper
adjustments of the exposure time and master gain (see chapter
Camera Settings
).
Also the 'Black Level' camera setting adjusts an offset brightness level for all
illuminated pixels and should be adjusted so that the minimum line visible within this
panel is to be seen above zero. See chapter
Camera Settings for a detailed
description.
Furthermore, the effect of choosing a manual ' Noise cut level' that defines a
brightness level in digits which needs to be exceeded by the spots in order to be
recognized, can be observed in this Lineview panel. For instance, an increased
ambient light level that will influence the determination of spot centroids, can be
rejected by setting the 'Noise cut level' to a value higher than the valleys in the
diagram.
The example illustrates the effect when the 'Noise cut level' is changed from 0 (left) to
50 (right).
Double click on the graph to see the ' Lineview Configuration ' panel.
The option ' Show Min/Max Lines ' is enabled by default and will display a graph
with two curves. Each point of the upper curve (white) displays the maximum and
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