How can I determine the minimum distance that can be detected between an object and a background by a retro-reflective sensor with background suppression?
The minimum distance between object and background is dependent on various factors, such as colour, size and shape. A retro-reflective sensor with background suppression requires a minimum reflection (dependent on the version) which can change. If the reflection is less than 5% (black object), the sensor must be tested under operating conditions. For objects that are transparent or reflect very weakly, a diffuse sensor may produce better results (if there are no objects in the background). The ability of a diffuse sensor with background suppression to differentiate between objects and background is greater closer to the sensor than at the maximum detection distance.
