Catalogue Multi Camera Color Vision sensors
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STABLE OPERATION
For stable inspection and better process yield
5 functions are available
ir
PMIOCR
Dark Compensation
Continuous capture
When the professional camera checks the image it will automatically check up to 5 (EM) or 6 images (PM/OCR), looking for a good reading. This insures stable operation if the trigger is not stable or the position of the object changes slightly. If the result is found to be OK the inspection will stop prior to reaching the maximum number of inspections.
For reliable inspection of color, the hue of each pixel is calculated. This function insures that captured Images are stable even with variations in lighting or when the distance to the target changes.
When the light is from the top
PM EM
The MVS calculates the hue of each pixel so it can get a homogenous color for each pixel. Regular vision detection simply adjust the brightness so the upper part is brighter than the lower part.
regular vision sensor
light
Trigger
Trigger
ON
ON
OFF
OFF
Original
Modified
When a bright ambient light is present
The MVS can get a homogenous color for each pixel even if the object has an area which is brighter due to external ambient light.
Inspection
Process
Store into memory
Inspection
1
2
3
4
5
6
1 2 3
OK
Original
Modified
Variable shutter speed ^J^J
PM EM OCR
Search function
When the distance varies
The Dark Compensation function is effective when the object distance varies and its brightness changes.
When the camera is checking the image using the Continuous Capture feature the shutter speed will automatically be adjusted up to +36% ~ -24%. This compensates for changes in the lighting.
The image is searched not only In the X and Y direction but it also can be rotated up to +/- 180 degrees (PM/OCR) or +/- 45 degrees (EM). This is useful when the position or orientation of the object changes.
regular vision sensor
Original
Modified
Available when specify the point to adjust
Scaling up/down
When the camera is checking the image using the Continuous Capture feature the image will automatically be scaled Up/Down by up to +/- 6%. This compensates for changes in the distance between the camera and object.
When the object is glossy
The Dark Compensation function helps to reduce bright spots on glossy surfaces.
Original
Modified
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