IRvision is inconsistent (Contrast ratio all over the place)

    Hi guys,
    We are running IRvision with lit tracking conveyors, and I am seeing all sorts of inconsistency with the contrast score. On the same part of the belt, I can see anything from 65% to 145%.
    The tracking conveyor uses LED backlighting.
    I cleaned the belts, but still get the same numbers, and made sure to measure on the same part of the belt each time.
    What can cause the reading to be that variable? Camera too far away? LED Flicker?

    Thanks!

    Vision work can be very tricky to get right. Often we forget about the 50/60Hz flicker of most lighting. Typically we use a specific wavelength of light that will reflect nicely off of the work piece. Then using a optical filter so that only that wavelength of the light source provided will get into the camera. This will greatly reduce the possibility that the ambient lighting is adding to the light getting into the camera.

    Lastly even LEDs can flicker. Make sure the back lighting is not flickering. Most LED light sources if dim-able are actually strobe at differing rates to dim.

Advertising from our partners