Gain/Offset Control dialog
The gain/offset dialog contains up to 6 sliders for altering gain and offset. The number of active sliders depends on
the individual number of adjustable gain/offset channels of the camera. When "Coupled Gain Channels" is ticked,
all channels are adjusted synchronously with one slider.
Enter commands for advanced software functions in the 'Camera Control' field (see page 13).
Line Scan Camera SK2048GJR-4L Manual (09.2016) • shar
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SK2048GJR-4L
Instruction Manual
(09.2016)
© 2016
Schäfter + Kirchhoff GmbH
•
Hamburg
Camera Control and Performing a Scan
If you are operating with a linear illumination source, check the alignment of the illumination source and the sensor
prior to performing a shading correction, as rotating the line sensor results in asymmetric vignetting.
Sensor and optics rotated in apposition
Sensor and optics aligned
Cameras are shipped prealigned with gain/offset factory settings. Open the "Gain/Offset Control" dialog to re-adjust
or customize these settings.
2. Adjust channel 1 gain
and minimize difference
between channels
using
Gain slider
1. Adjust channel 1 zero
level and minimize diffe-
rence between channels
using
Offset slider
Offset and gain adjustment for more than one gain/offset channel
Adjustment principle
1. Offset
To adjust the zero baseline of the video signal, totally
block the incident light and enter "00" (volts) for channel 1.
For a two- or multi-channel sensor, minimize any diffe-
rences between the channels by adjusting the other
Offset sliders.
A slight signal noise should be visible in the zero baseline.
2. Gain
Illuminate the sensor with a slight overexposure in order
to identify the maximum clipping. Use the Gain slider "1"
to adjust the maximum output voltage.
For a two- or multi-channel sensor, minimize any diffe-
rences between the channels by adjusting the other Gain
sliders.
For the full 8-bit resolution of the camera, the maximum
output voltage is set to 255 and for 12-bit is set to 4095.
Sensor Alignment
Gain/Offset Adjustment
