Abstract: A system for facilitating tracking of a moving object is disclosed. The object has a feature associated therewith which is illuminated with ambient light. The system includes illumination means for illuminating at least the feature of the object with a tracking light. The system also includes detection means for detecting an image of the feature and for outputting signals corresponding to movement of the image. The signals have a first component due to the tracking light and a second component due to the ambient light. Further, the system includes filter means for filtering the second component from the signals and for outputting the first component of the signals so that the ambient light is discriminated from the tracking light and the moving object can be tracked using the first component of the signals.

Abstract: A beam intensity profilometer produces a fluorescent emission distribution having a spatial distribution linearly proportional to the local intensity of an incident UV beam shined into the profilometer. The spatial distribution of the UV beam is analyzed and displayed as a function of the fluorescent emission.