Omron F160 Vision Sensor Setup Manual page 38

Lighting
Reflected Lighting
Applications: Inspection of exterior shape or positioning inspection
Measurement object
Ring Lights
Light is shone uniformly on the measurement object.
Applications: Surface inspections
Camera
Light source
Measurement object
Oblique Lighting
Detection can be made utilizing the difference in regular and diffuse reflected
light.
Camera
Light source
Section 3-2
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