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US 8,506,559 B2Granted
Variable stage optical system for ophthalmic surgical laser
AssigneeAlcon LenSx, Inc.
InventorFerenc Raksi
Life of this patent
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Abstract
Systems and techniques for providing variable scanning control in delivering a laser beam of laser pulses to a surgical target are provided. The described systems and techniques can be used for laser surgery within the anterior segment of the eye and the crystalline lens via photodisruption caused by laser pulses from a femtosecond laser.
Claims36
An ophthalmic laser system, comprising:
- a laser source that generates a laser beam of laser pulses;
- an XY scanner that scans the laser beam in directions transverse to a Z axis;
- a Z scanner that scans the laser beam along the Z axis and includes
- a continuous Z scanner that provides continuous scanning of the laser beam along the Z axis;
- and
- an incremental Z scanner that provides incremental scanning of the laser beam along the Z axis,
- the incremental Z scanner one or more variable stages that can be positioned in and out of a path of the laser beam.
4 more elements
The ophthalmic laser system of claim , wherein:
- the continuous Z scanner comprises a first block, positioned between the laser source and the XY scanner;
- and
- a second block, positioned after the XY scanner in a path of the laser beam.
A method of scanning a laser beam, the method comprising the steps of:
- generating a laser beam by a laser source;
- Z-scanning a focus depth of the laser beam by a continuous Z scanner;
- and
- Z-scanning the focus depth of the laser beam by an incremental Z scanner by positioning one or more variable stages of the incremental Z scanner in a path of the laser beam.
1 more element
A scanning laser system, comprising:
- a laser source, to generate a pulsed laser beam;
- an XY scanner,
- to scan the laser beam in directions transverse to a Z axis;
- a continuous Z scanner;
- and
- a variable stage Z scanner, comprising variable stages, configured to be positioned in and out of a path of the laser beam,
- to scan the laser beam along the Z axis.
4 more elements
Dependencies are inferred from the claim text.