I'm currently using a Lite-on phototransistor (LTR-4206E) and a Lite-on LED (LTE-4206) as part of a object recognition scheme. These are infrared devices. The idea is to detect the reflected infrared emissions from the object as they pass by. I cannot use a method where the infrared LED and phototransistor are facing each other, so I have to use reflected emissions.
My problem is that the system is much more sensitive to white objects as opposed to black or gray objects.
Is there a reasonable simple (and cheap) way to resolve this? I cannot put reflective tags or anything else on the objects.
Thanks in advance for your help.
My problem is that the system is much more sensitive to white objects as opposed to black or gray objects.
Is there a reasonable simple (and cheap) way to resolve this? I cannot put reflective tags or anything else on the objects.
Thanks in advance for your help.