Active opto-electronic arrangement for automatic focussing

摘要

The invention relates to an active opto-electronic arrangement for automatic focussing and can be used in the case of surfaces with any reflection capacity. The aim of bringing about an automatic focussing irrespective of position, shape and structure of the surface is achieved by an arrangement being indicated, with which a self-illuminating or illuminated diaphragm is formed by optical structural elements onto the surface to be focussed and its image is formed onto a receiver by a beam splitter via a receiver diaphragm which is identical with the transmitter diaphragm. In the focussed state, an energy maximum is indicated or, in the case of use of a complementary diaphragm, a minimum.