2-6
Section
Lighting
17
Oblique Lighting
Detection is made by distinguishing regular and diffuse reflected
light.
Applications: PCBs and electronic parts
Reading object
(2-dimensional code)
Camera
Light source
Coaxial Lighting
A stable image with few shadows can be obtained of a reading
object with an uneven surface by detecting only regular reflected
light.
Applications: Mirror-like objects such as wafers
Camera
Reading object
(2-dimensional code)
Light source
Half mirror