APPARATUS AND METHOD FOR THE DETECTION OF THE FOCUSED POSITION OF AN OPTICAL SYSTEM, AND OPHTHALMOLOGICAL TREATMENT APPARATUS

摘要

The method involves inserting specific optical elements in an illuminating system around the focal position for making possible the beam product, the divergence of laser beam and the power control. The specific optical elements are used in the illuminating system as diffractive optical elements such as lattice, fresnel-zone-lenses and beam-shaped-elements. The execution is done in the form of binary or multi-level diffractive elements. Independent claims are also included for the following: (1) use and arrangement of pinholes (2) insertion in the diagnostic optical path (3) use of fs-laser system as the light source.