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    Laser beam calibration and beam quality measurement in laser surgery systems
    1.
    发明授权
    Laser beam calibration and beam quality measurement in laser surgery systems 有权

    公开(公告)号：US11896526B2

    公开(公告)日：2024-02-13

    申请号：US16885252

    申请日：2020-05-27

    Applicant: AMO DEVELOPMENT, LLC

    Inventor： Noah Bareket ,  David A. Dewey ,  Michael J. Simoneau

    IPC: A61F9/08 ,  A61F9/008 ,  A61F9/009

    CPC classification number: A61F9/008 ,  A61F9/009 ,  A61F2009/00844 ,  A61F2009/00855

    Abstract: A laser eye surgery system includes a computer which scans a focused laser beam in a trajectory over a reticle or target and determines beam quality via laser light reflected from the target. The target may have a grid pattern of lines, with the diameter of the focused laser beam determined based on a time interval for the scanned beam to move onto a line of the grid pattern. Methods for measuring beam quality in a laser eye surgery system provide a direct, quantitative quality measurement of the focused laser beam, and may be performed quickly and automatically. Using scanning mirror position information together with signals resulting from laser light reflected from the target, the laser eye surgery system may also be calibrated.

    CALIBRATION PROCESS FOR FEMTOSECOND LASER INTRAOCULAR LENS MODIFICATION SYSTEM USING VIDEO AND OCT TARGETING
    2.
    发明申请
    CALIBRATION PROCESS FOR FEMTOSECOND LASER INTRAOCULAR LENS MODIFICATION SYSTEM USING VIDEO AND OCT TARGETING 有权

    公开(公告)号：US20250009558A1

    公开(公告)日：2025-01-09

    申请号：US18772786

    申请日：2024-07-15

    Applicant: AMO Development, LLC

    Inventor： Alexander Vankov ,  Jenny Wang ,  David A. Dewey ,  Phillip Gooding ,  Richard Hofer ,  Georg Schuele

    IPC: A61F9/008 ,  G02B26/10

    Abstract: The XYZ beam position of an ophthalmic laser system is calibrated by measuring a fluorescent signal induced by the focused laser beam in a thin glass coverslip via multiphoton absorption. A video camera measures the XY position and intensity of the fluorescent signal as the focused laser beam strikes the coverslip. The Z position of the focus is determined by scanning the targeted z position and identifying the Z scanner position of peak fluorescence. An OCT system measures the real space Z location of the coverslip, which is correlated with the Z scanner position. Other laser system parameters are assessed by repeatedly scanning a lower energy laser beam in a piece of IOL material, and observing damage (scattering voids) formation in the IOL material. Based on the rate of damage formation, laser system parameters such as beam quality, numerical aperture, pulse energy, and pulse duration, etc. can be assessed.

    High speed tracking of IOL during refractive index modification
    5.
    发明授权
    High speed tracking of IOL during refractive index modification 有权

    公开(公告)号：US11534339B2

    公开(公告)日：2022-12-27

    申请号：US17057686

    申请日：2020-04-09

    Applicant: AMO Development, LLC

    Inventor： David A. Dewey ,  Michael Wiltberger ,  Phillip Gooding ,  Georg Schuele

    IPC: A61F9/008 ,  G16H30/40

    Abstract: During a process of refractive index modification of an intraocular lens (IOL) using an ophthalmic laser system, optical position monitoring of the IOL is performed by a video camera system viewing the top surface of the IOL. Fiducials are incorporated into the IOL at manufacture, or created in-vivo with laser. The monitoring method employs a defined area of interest (AOI) to limit the number of pixels to be analyzed, to achieve adequately high acquisition speed. In one example, the AOI contains 5 camera scan line segments, each line segment having sufficient pixels to create a stable amplitude signature. Successive frames of the AOI are analyzed to detect movement of the fiducial and/or to determine whether the fiducial has been lost.

    Narrow angle illumination ring for ophthalmic surgical laser system
    6.
    发明授权
    Narrow angle illumination ring for ophthalmic surgical laser system 有权

    公开(公告)号：US11491052B2

    公开(公告)日：2022-11-08

    申请号：US17058654

    申请日：2019-08-28

    Applicant: AMO DEVELOPMENT, LLC

    Inventor： David A. Dewey ,  Frank D. Fellenz ,  Tianheng Wang

    IPC: A61F9/007 ,  A61F9/008

    Abstract: A narrow angle illumination light source for an ophthalmic surgical laser system includes multiple light emitting diodes (LEDs), multiple corresponding ball lenses, multiple corresponding upper apertures located between the LEDs and the lenses (optional), and multiple corresponding lower apertures located below the lenses. The light passing through each upper aperture and corresponding lens forms a light cone having a defined divergence angle and cone axis angle; the light cone only illuminates the corneal and sclera of a docked eye without illuminating the patients nose and orbit. The lower apertures may have distinctive shapes to aid video focusing. The multiple LEDs are distributed uniformly in the circle, and may be divided into multiple independently controllable segments which allows directional illumination. The LEDs also have controllable brightness to allow images of darker and brighter illuminations to be taken in short succession.

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