Start with the signal window / oscilloscope display. Any changes in the optical system or camera parameters
are displayed in real-time when using an open dialog box.
The oscilloscope display facilitates the effective focussing of the line scan camera system, even for two-dimensional
measurement tasks. For determining the correct focus, the edge steepness at dark-bright transitions and the
modulation of the line scan signal are the most important factors.
• Adjust the focus using a fully opened aperture to restrict the depth of field and to amplify the effects of focus
adjustments.
• The signal amplitude may require trimming when using a fully opened aperture and this can achieved most readily
by shortening the integration time, as described in section
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
• Lens focussing
• Sensor alignment
• Gain/Offset
• Shading correction
• Integration time
• Synchronization of the sensor exposure and
the object surface velocity, trigger mode
options.
Prior to a scan, the following adjustments and parameter settings should be considered for optimum scan
signals:
Out-of-focus:
• Low edge steepness
• Signal peaks are blurred
• High-frequency gray values with low
modulation
Optimum focus:
• Dark-bright transitions with steep edges
• Large modulation in the signal peaks
• High-frequency gray value variations
3.2
Adjustments for Optimum Scan Results
Lens Focussing
