Scanning device
AssigneeCarl Zeiss Meditec AG
InventorsMarco Hanft, Dirk Muehlhoff, Mark Bischoff, Mario Gerlach
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Abstract
A scanning device for focusing a beam of rays in defined regions of a defined volume, comprising an input optics wherein the beam of rays penetrates first, having at least one first optical element; a focusing optics for focusing the beam of rays exiting from the input optics; and a deflecting device arranged between the first optical element and the focusing optics, for deflecting the beam of rays after it has passed through the first optical element, based on a position of the focus to be adjusted in lateral direction. In order to adjust the position of the focus of the beam of rays in the direction of the beam of rays, and optical element of the input optics can be displaced relative to the deflecting device.
Claims20
A surgical laser system including a scanning device for focusing a luminous beam into a selected range of an eye to be treated, the surgical laser system comprising:
- a femtosecond surgical laser source that produces the luminous beam;
- entrance optics following the femtosecond surgical laser source into which the luminous beam first enters comprising at least a first optical element;
- focusing optics by which the luminous beam emitted from the entrance optics is focused on or into the eye to be treated;
- a deflecting device arranged between the first optical element and the focusing optics that diverts a focus position of the luminous beam;
- the deflecting device comprising a first movable reflective element movable about a first axis configured to deflect the luminous beam in an X direction and a second movable reflective element movable about a second axis that is substantially orthogonal to the first axis configured to deflect the luminous beam in a Y direction;
- and
- a beam splitter, located between the deflecting device and the focusing optics;
- and in which the entrance optics and focusing optics are chromatically corrected over a spectral range of selected femtosecond pulses such that the selected femtosecond pulses are focused with a dispersion induced temporal broadening of less than 30%.
A method of focusing a luminous beam into a selected range of a volume of an eye to be treated, the method comprising:
- producing the luminous beam with a femtosecond laser source;
- directing the luminous beam into entrance optics comprising at least a first optical element;
- deflecting the luminous beam about a first axis and second axis that is orthogonal to the first axis;
- dividing the luminous beam with a beam splitter;
- then focusing the luminous beam on or into the eye to be treated with focusing optics;
- and
- utilizing chromatically corrected optics that are chromatically corrected over a spectral range of selected femtosecond pulses for the entrance optics and the focusing optics such that the selected femtosecond pulses are focused with a dispersion induced temporal broadening of less than 30%.
Dependencies are inferred from the claim text.