Optical arrangement and method for photoelectric distance setting (focusing), in particular for surgical microscopes

摘要

Optical arrangement and method for photoelectric distance setting, in particular for surgical microscopes. When the object plane is shifted, the line of maximum mean contrast of a matrix-shaped receiver arrangement and the change in position of this line are determined, and a control signal is determined from the direction and magnitude of the migration for a motorised focusing control. This arrangement can be used with optical observation, recording and measuring devices at close range. <IMAGE>