The color backscattered from a good sample in a fiber optic cable is expected as the target state during testing. If the measured color or brightness deviates by an adjustable value, it is recognized as a defect.
LightNails® can help you precisely when a directly evaluating optical system is out of the question for geometric or perspective reasons. Even in a cramped test adapter, the test coverage can be extended to include, for example, connectors, labels, block capacitors and mechanical components, without you having to allow for a longer test time or an additional process step.