Optical system for ophthalmic surgical laser
A laser system for ophthalmic surgery includes a laser engine to generate a pulsed laser beam, and an XY scanner, to receive the generated pulsed laser beam, and to output a scanning laser beam, the XY scanner including an X scanner, including two X scanning minors, and a Y scanner, including two Y scanning minors. The XY scanner can modify essentially independently an angle the outputted scanning laser beam makes with an optical axis, and a position at which the outputted scanning laser beam intersects a subsequent reference plane perpendicular to the optical axis.
1. A laser system for ophthalmic surgery, comprising:
a laser engine to generate a pulsed laser beam; and
an XY scanner,
to receive the generated pulsed laser beam, and
to output a scanning laser beam,
the XY scanner comprising
an X scanner, including two X scanning mirrors, and
a Y scanner, including two Y scanning mirrors.
2. The laser system of claim 1 , wherein:
the X scanner is configured so that a pivot point of the X scanner is off a mirror of the X scanner.
3. The laser system of claim 2 , wherein:
a pivot point of the X scanner is essentially on a mirror of the Y scanner.
4. The laser system of claim 1 , wherein:
the Y scanner is configured so that a pivot point of the Y scanner is off a mirror of the Y scanner.
5. The laser system of claim 1 , wherein:
the X scanner and the Y scanner are configured so that a pivot point of the X scanner is off a minor of the X scanner and the pivot point of the Y scanner is off a mirror of the Y scanner and the X scanner pivot point essentially coincides with the Y scanner pivot point.
6. The laser system of claim 1 , wherein:
the X scanner and the Y scanner are configured so that and the X scanner pivot point coincides with the Y scanner pivot point.
7. The laser system of claim 1 , wherein:
a pivot point of the Y scanner is essentially on an entry surface of a subsequent optical element.
8. The laser system of claim 1 , wherein:
a pivot point of the Y scanner is essentially on the input pupil of a subsequent optical element.
9. The laser system of claim 1 , wherein:
the XY scanner is configured to modify essentially independently:
an angle a scanning laser beam outputted by the XY scanner makes with an optical axis, and
a position at which the outputted scanning laser beam intersects a subsequent reference plane perpendicular to the optical axis.
10. The laser system of claim 1 , wherein:
the XY scanner is configured to reduce an aberration compared to the aberration of a corresponding laser system including an XY scanner with only two mirrors.
11. The laser system of claim 1 , wherein:
the XY scanner is configured to reduce an astigmatism compared to the astigmatism of a corresponding laser system including an XY scanner with only two mirrors.
12. The laser system of claim 1 , wherein:
the XY scanner is configured to reduce a coma compared to the coma of an essentially identical laser system including an XY scanner with only two mirrors.
13. The laser system of claim 1 , wherein:
the XY scanner is configured to scan the laser beam over an XY scanning range whose maximum is longer than 5 millimeter and shorter than 15 millimeter at the focal plane of the laser system.
14. The laser system of claim 1 , wherein:
the XY scanner is configured to scan the laser beam over an XY scanning range whose maximum is longer than 8 millimeter and shorter than 13 millimeter at the focal plane of the laser system.
15. A laser system for ophthalmic surgery, comprising:
a laser engine to generate a pulsed laser beam; and
an XY scanner,
to receive the generated pulsed laser beam and
to output a scanning laser beam,
wherein the XY scanner is configured to modify essentially independently
an angle the outputted scanning laser beam makes with an optical axis, and
a position at which the outputted scanning laser beam intersects a subsequent reference plane perpendicular to the optical axis, and
the XY scanner comprises
an X scanner, including two X scanning mirrors, and
a Y scanner, including two Y scanning mirrors.
16. The laser system of claim 15 , wherein:
an X-pivot point is off an X scanning mirror; and
a Y-pivot point is off a Y scanning mirror.
17. The laser system of claim 15 , wherein:
an X-pivot point is off an X scanning mirror;
a Y-pivot point is off a Y scanning mirror; and
the X pivot point essentially coincides with the Y pivot point.
18. The laser system of claim 15 , wherein:
the XY scanner is configured to scan the laser beam over an XY scanning range whose maximum is longer than 5 millimeter and shorter than 15 millimeter at the focal plane of the laser system.