Optical System With Movable Lens For Ophthalmic Surgical Laser

Abstract

An eye-surgical laser system includes a laser source, to generate a laser beam, an XY scanner, to scan a focal spot of a received laser beam in an XY direction essentially transverse to an optical axis of the laser system, and a lens group, disposed in the optical path between the laser source and the XY scanner, to receive the laser beam generated by the laser source, to precompensate an aberration of the laser beam, and to forward the precompensated laser beam to the XY scanner, the lens group having a movable lens, movable in a Z direction along an optical axis.

1 . An eye-surgical laser delivery system, comprising:
 a laser source, configured to generate a surgical laser beam with laser parameters, to be delivered and focused into a focal spot in a surgical target area by the laser delivery system;   an XY scanner, configured to scan the focal spot of the surgical laser beam in an XY direction essentially transverse to an optical axis of the laser system;   a Z scanner, configured to scan the focal spot of the surgical laser beam longitudinal to the optical axis of the laser system;   an OCT imaging subsystem, configured to generate an image of the surgical target area by scanning an imaging beam across the surgical target area; and   a computational controller, configured to change a laser parameter between a first step and a second step of a multi-step surgery.   
     
     
         2 . The eye-surgical laser delivery system of  claim 1 , wherein:
 the changed laser parameter is one of a pulse energy, a repeat frequency, and a pulse duration.   
     
     
         3 . The eye-surgical laser delivery system of  claim 2 , wherein:
 the computational controller is configured to change the repeat frequency and the pulse energy.   
     
     
         4 . The eye-surgical laser delivery system of  claim 2 , wherein:
 the laser parameters include at least one of
 a pulse duration in the 1 femtosecond to 100 picosecond range, 
 a pulse energy in the 1 microJoule to 100 microJoule range, and 
 a pulse repeat frequency in the 10 kHz to 100 MHz range. 
   
     
     
         5 . The eye-surgical laser delivery system of  claim 1 , wherein:
 the first step of the complex surgery is a first surgical procedure and the second step is a second, different surgical procedure.   
     
     
         6 . The eye-surgical laser delivery system of  claim 1 , wherein:
 the imaging beam has a separate optical path from the surgical laser beam.   
     
     
         7 . The eye-surgical laser delivery system of  claim 1 , wherein:
 the imaging beam has an at least partially shared optical path with the surgical laser beam.