THORLABS DCU223x Operation Manual And Sdk page 118

DCx Cameras
Line number
Defines the line to be scanned
For further information see "Basics":
Log mode
The Log mode is a special mode of the DCC1240x and DCC3240x camera models. It defines the threshold defines
at which the linear sensitivity changes into a logarithmic characteristic.
At very short exposure times (less than 0.1 ms) there may occur e.g. so-called crosstalk effects in the global
shutter mode, which have the effect that the image content appears brighter in the vertical from top to bottom. This
effect can be avoided by the Log mode.
Factory-default with anti-blooming
Recommended setting
Off (no anti-blooming)
At longer exposure times without gain, it may happen that the sensor does not achieved white. This is because of
the sensor automatism to prevent overexposure (blooming). Remedy offers the use of a gain factor of 1.4x or the
mode "Off (no anti-blooming)."
For short exposure times this mode should not be used, otherwise the image (particularly in global shutter mode)
can be extremely overexposed.
Manual Log mode
In this mode it is possible to display the information in the overexposed image areas. This mode is effective for
exposure times below 5 ms.
o LogMode value
Using a slide control with 13 levels you can adjust the threshold at which the linear sensitivity pass over into a
logarithmic characteristic. Here, the value "0" represents the lowest active level and "12" corresponds to the
highest level.
o LogMode gain
When using the manual Log mode no master gain is possible. The gain can be adjusted with the LogMode
gain. The gain can be adjusted in 5 levels. The level "3" corresponds to a gain factor of 1 for monochrome or
color sensors. For the NIR sensor the level "1" corresponds to a gain factor of 1.
Example: A low level results in a low gain and may display more details in the overexposed image areas. A
higher level gives a higher gain, thereby a darker image can be brightened (see also
Application Notes
63
Default
Click this button to reset all parameters to the model-specific defaults.
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Line scan mode
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DCC1240x / DCC3240x
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