Patent ID: 11865043
Assignee: CARL ZEISS MEDITEC AG
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
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.