Patent ID: 7621637

Claim:
Ophthalmological apparatus comprising: a base station having a light source for generating light pulses; an application head which can be mounted on an eye, the application head further comprising: a light projector for the focussed projection of the light pulses for punctiform breakdown of eye tissue, and movement drivers for moving the light projector in a feed direction and in a first scanning direction, beam deflecting means, arranged in the base station, for deflecting the light pulses in a second scanning direction; an optical transmission system for transmitting deflected light pulses from the base station to the application head, and for superimposing the light pulses deflected in the second scanning direction onto the movement of the light projector in the first scanning direction, the optical transmission system further comprising a rotation element for rotating a scanning plane defined by the deflected light pulses about an optical transmission axis; a transmitter, arranged in the application head, for emitting a light mark for determining a desired alignment of the second scanning direction, the light mark is arranged such that it can be transmitted to the base station via the optical transmission system; a light sensor module, arranged in the base station, and a regulation module, arranged in the base station, which is connected to the light sensor module and is set up to control the rotation element so that the scanning plane defined by the deflected light pulses is rotated about the optical transmission axis until the desired alignment of the second scanning direction has been reached; and wherein the light sensor module further comprises two light sensors for detecting the light mark transmitted via the optical transmission system to the base station, and the regulation module is set up to control the rotation element on the basis of a sum and/or a difference of luminosities, determined by the light sensors, of the detected light mark.