Ophthalmological device for treating eye tissue

Patent metadata

Field	Value
Publication number	US-10245180-B2
Application number	US-201414154614-A
Country	US
Kind code	B2
Filing date	Jan 14, 2014
Priority date	Jan 16, 2013
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

An ophthalmological device (10) for treating eye tissue (6) with laser pulses (L) comprises a projection optical unit (3) for focused projection of the laser pulses (L), a scanner system (1) for dynamically deflecting the laser pulses (L) and a zoom system (20), which is arranged between the projection optical unit (3) and the scanner system (1) and which is configured to adjust the focused projection of the laser pulses (L) in the projection direction (r) in different zoom settings (z). The ophthalmological device (10) moreover comprises a displacement device (4), which is configured to displace the scanner system (1) depending on the zoom setting (z) of the zoom system (20). What the displacement (s) of the scanner system (1) coupled to the zoom setting (z) of the zoom system (20) renders possible is the adaptation of the position of the scanner system (1) in a dynamic and synchronized fashion to the setting of the zoom system (20) and hence to the current position of the virtual entry pupil (Pa, Pb) of the zoom system (20).

First claim

The invention claimed is:

1. An ophthalmological device for treating eye tissue with laser pulses, comprising:
a scanner system for dynamically deflecting the laser pulses;
a projection optical unit for focused projection of the laser pulses in a projection direction;
a zoom system, which is arranged downstream of the scanner system and upstream of the projection optical unit, between the scanner system and the projection optical unit, and which is configured to adjust the focused projection of the laser pulses in the projection direction in different zoom settings, whereby the zoom system has an optical axis and a virtual entry pupil which moves along the optical axis with the different zoom settings; and
a displacement device, which is configured to displace the scanner system along the optical axis of the zoom system depending on the zoom setting of the zoom system, the displacement device comprising a drive coupled to the scanner system and configured to displace the scanner system along the optical axis of the zoom system, and one or more circuits configured to control the drive to displace the scanner system along the optical axis of the zoom system using a current zoom setting of the zoom system, wherein the displacement device is configured to adapt a position of the scanner system, with respect to a current position of the virtual entry pupil of the zoom system, for continuously maintaining a value of distance of the scanner system from the virtual entry pupil of the zoom system.

2. The ophthalmological device as claimed in claim 1 , wherein the one or more circuits are configured to control the drive to displace the scanner system depending on the current position of the virtual entry pupil of the zoom system.

3. The ophthalmological device as claimed in claim 1 , wherein the one or more circuits are configured to control the drive to displace the scanner system along the optical axis of the zoom system to a defined position in respect of the virtual entry pupil of the zoom system.

4. An ophthalmological device for treating eye tissue with laser pulses, comprising:
a scanner system for dynamically deflecting the laser pulses;
a projection optical unit for focused projection of the laser pulses in a projection direction;
a zoom system, which is arranged downstream of the scanner system and upstream of the projection optical unit, between the scanner system and the projection optical unit, and which has an optical axis and is configured to adjust the focused projection of the laser pulses in a projection direction in different zoom settings, whereby the zoom system has a virtual entry pupil which moves along the optical axis with the different zoom settings; and
a displacement device, which is configured to displace the scanner system, along the optical axis of the zoom system and coupled to a zoom movement carried out by the zoom system, for displacing the scanner system along the optical axis of the zoom system in a synchronized manner with the zoom setting of the zoom system, and adapt a position of the scanner system, with respect to a current position of the virtual entry pupil of the zoom system, for continuously maintaining a value of distance of the scanner system from the virtual entry pupil of the zoom system.

Assignees

• Rathjen Christian
• Ziemer Ophthalmic Systems Ag

Inventors

• Rathjen Christian

Classifications

• A61F9/008 Primary

  using laser · CPC title

• A61F2009/00897

  Scanning mechanisms or algorithms · CPC title