Surface penetration monitoring appts. - has spot light source in focal point of curved optical element and triple mirror reflection system

摘要

The light beam emerging from the light source is shaped differently by the curved optical element in two directions, perpendicular to one another, so as to produce a beam scanning the face completely. The scanning beam is reflected on a triple mirror arrangement and supplied to a photoelectronic element. The curved optical element is a mirror (3) which is curved in the form of a circle in the plane of the face to be monitored and in the form of an ellipse in the planes perpendicular to it.