Linea HS Series Camera User's Manual Camera Features • 39
Ensuring Image Alignment & Response Level
The module uses a staggered sensor arrangement to ensure 100% object coverage in the image
requiring no interpolation as with butted sensors. To establish image alignment, the module
appropriately delays the image data from each sensor. Factory calibration is performed using a
scan direction pixel size of 42um or 28um with the module optical axis perpendicular to the object
surface.
Object Pixel Size
If the inspection system is using a larger pixel to accommodate a faster web speed or achieve a
longer integration time, scan direction adjustment of the stagger delay values is required.
Related Feature: Object Pixel Size, AcquisitionStart and AcquisitionStop
The user can enter the object pixel size being used and the module will automatically adjust the
delay values to ensure image alignment.
Acquisition must be stopped to access this feature
Angle Correction
To achieve optimum defect detection, the inspection system may require the optical axis of the
module to be at an angle to the object surface and adjustment of the stagger delay values is
required.
Related Feature: Angle Correction, AcquisitionStart and AcquisitionStop
The user can enter the module angle away from perpendicular and the module will automatically
adjust the delay values to ensure image alignment. The adjustment is not sensitive to whether the
angle is positive or negative. Angles up to 45° can be accommodated
Acquisition must be stopped to access this feature
Response Leveling
Analog circuitry, as present in all types of sensors and associated analog to digital convertors, may
have a tendency to change their characteristics over temperature. This could cause a small change
in the response from sensor to sensor. Sensor to sensor response leveling can be automatically
performed by the module
Related Feature: Response Levelling Trigger
Response leveling can be performed while imaging, however, when the leveling is applied, a small
disturbance in the image may occur. The user can initiate when this occurs using the response
leveling trigger. The object being imaged must be moving when Response Leveling is performed.
The faster the motion, the quicker it completes as it involves averaging multiple lines.
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