US 11,865,043 B2
Optical system for a laser therapy instrument
Gregor Stobrawa, Jena (DE); and Mark Bischoff, Jena (DE)
Assigned to Carl Zeiss Meditec AG, Jena (DE)
Filed by Carl Zeiss Meditec AG, Jena (DE)
Filed on Jun. 3, 2022, as Appl. No. 17/805,273.
Application 17/805,273 is a continuation of application No. 16/684,048, filed on Nov. 14, 2019, granted, now 11,351,061.
Application 16/684,048 is a continuation of application No. 14/116,471, granted, now 10,478,340, issued on Nov. 19, 2019, previously published as PCT/EP2012/054743, filed on Mar. 19, 2012.
Claims priority of provisional application 61/485,995, filed on May 13, 2011.
Claims priority of application No. 10 2011 075 799.6 (DE), filed on May 13, 2011.
Prior Publication US 2022/0370241 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 9/008 (2006.01)
CPC A61F 9/008 (2013.01) [A61F 9/00825 (2013.01); A61F 9/0084 (2013.01); A61F 2009/0087 (2013.01); A61F 2009/00872 (2013.01); A61F 2009/00874 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An optical system for a laser therapy instrument, suitable for laser surgery of an eye of a human patient, the optical system comprising:
a femtosecond laser radiation source that emits therapeutic laser radiation;
an objective from which the therapeutic laser radiation exits and is directed and focused on to or into the eye;
several optical assemblies that include at least a first optical assembly, a second optical assembly and a third optical assembly that each vary a focus of the therapeutic laser radiation, with at least three different focus variation ranges Δz of each of the at least the first optical assembly, the second optical assembly and the third optical assembly, and which are insertable into a beam path alternately;
thereby limiting an object-side Z scanning range to at least three axially separated tissue regions of the eye.