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Optical System for Ophthalmic Surgical Laser

a laser and optical system technology, applied in laser surgery, medical science, surgery, etc., can solve the problems of limited precision associated with such lens fragmentation techniques, considerable limitations on the precision and control of procedures, and relatively high risk of unwanted outcomes

Inactive Publication Date: 2011-02-03
ALCON LENSX
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0037]In some implementations the precompensating step includes increasing a Strehl ratio S of the laser beam to a value greater than S(precomp), wh

Problems solved by technology

These procedures use manual instruments, ultrasound, heated fluids or lasers and tend to have significant drawbacks, including the need to enter the eye with probes in order to accomplish the fragmentation, and the limited precision associated with such lens fragmentation techniques.
These relatively long pulses deposit relatively large amounts of energy into the surgical spots, resulting in considerable limitations on the precision and control of the procedure, while creating a relatively high level of risk of unwanted outcomes.
As such, these designs do not offer solutions for the considerable challenges of performing surgery on the lens of the eye.

Method used

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  • Optical System for Ophthalmic Surgical Laser
  • Optical System for Ophthalmic Surgical Laser
  • Optical System for Ophthalmic Surgical Laser

Examples

Experimental program
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Embodiment Construction

efficient Z scanning functionality.

[0046]FIGS. 8A-D illustrate implementations of the precompensator 200.

[0047]FIG. 9 illustrates an implementation of the laser delivery system 1 with two Z Scanners.

[0048]FIG. 10 illustrates a table of configurations containing 0, 1, or 2 Z depth Scanner and 0, 1, or 2 NA modifiers.

[0049]FIGS. 11A-C illustrate an XY Scanner with 2, 3, and 4 scanning mirrors.

[0050]FIGS. 12A-D illustrate an aberration as a function of a numerical aperture and the corresponding optical numerical aperture NAopt(z) as a function of the Z focal depth.

[0051]FIGS. 13A-B illustrate two settings of the First Beam Expander block 400 and the Movable Beam Expander block 500.

[0052]FIG. 14 illustrates the intermediate focal plane of the Z Scanner 450.

[0053]FIG. 15 illustrates an implementation of the Objective 700.

[0054]FIG. 16 illustrates a curved focal plane in the target region.

[0055]FIG. 17 illustrates a nomogram of the XY Scanner inclination angle.

[0056]FIG. 18 illustrates a ...

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Abstract

A laser delivery system for ophthalmic surgery includes a laser engine, configured to generate a laser beam, an optical block, to receive the laser beam generated by the laser engine and to precompensate an aberration of the laser beam, and an XY scanner, to receive, directly or indirectly, the precompensated laser beam outputted by the optical block and to scan the laser beam in a direction essentially transverse to an optical axis of the laser delivery system.

Description

FIELD OF INVENTION[0001]This invention relates to a system for surgery of the anterior segment of the eye with a femtosecond laser, more particularly to embodiments minimizing optical distortions of the laser beam while scanning and focusing the laser beam into the eye.BACKGROUND[0002]This application describes examples and embodiments of techniques and systems for laser surgery within the anterior segment of the eye the crystalline lens via photodisruption caused by laser pulses. Various lens surgical procedures for removal of the crystalline lens utilize various techniques to break up the lens into small fragments that can be removed from the eye through small incisions. These procedures use manual instruments, ultrasound, heated fluids or lasers and tend to have significant drawbacks, including the need to enter the eye with probes in order to accomplish the fragmentation, and the limited precision associated with such lens fragmentation techniques.[0003]Photodisruptive laser tec...

Claims

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Application Information

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IPC IPC(8): A61F9/008A61B18/20
CPCA61F2009/00872G02B27/0075A61F2009/00859A61F2009/0087A61F2009/00848A61F9/008A61F9/00825A61F2009/00897
Inventor RAKSI, FERENCBUCK, JESSE
Owner ALCON LENSX
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