Image Acquisition
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NIR-Mode
The designation "NIR" stands for "Near Infrared". If you activate this mode, it
is possible to achieve a further increase of up to 20% in the light sensitivity of
the sensor in the range of red and near infrared wavelengths (from approx.
650 nm). However, this makes the CCD sensors more susceptible to
overexposure (so-called "blooming"). We recommend that you use this mode
for particularly weak fluorescence samples in this wavelength range, to reduce
the exposure times required.
Note:
•
This mode is
only
available for the black/white version of the AxioCam.
With color cameras an infrared barrier filter blocks light above approx.
710 nm. This filter has been permanently installed into the color cameras,
as it is essential in order to acquire colors correctly.
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Camera Gain
Enableling this check box activates the analog gain of the image data.
If this check box is activated, analog gain by a factor of approximately 2 is
applied to the image data. Weak signals are therefore displayed more brightly.
Notes:
•
This function is available from camera models HR and MR, from Revision
3 onwards.
•
The use of gain reduces the maximum dynamic range that can be
achieved by the camera. As camera noise is also intensified as a result, no
actual increase in sensitivity is achieved.
66
M 60-3-0014 e / printed 12.2008
