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公开(公告)号：US12138201B2
公开(公告)日：2024-11-12
申请号：US17651242
申请日：2022-02-15
Applicant: AMO Development, LLC
Inventor： Alireza Malek Tabrizi , Hong Fu , James E. Hill , Mohammad Saidur Rahaman , Zenon Witowski
Abstract: Embodiments generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to form a top lenticular incision and a bottom lenticular incision of a lens in a corneal stroma.
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公开(公告)号：US11963907B2
公开(公告)日：2024-04-23
申请号：US17448175
申请日：2021-09-20
Applicant: AMO Development, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu
CPC classification number: A61F9/008 , G01J1/4257 , G02B26/0875 , G02B27/108 , A61B2018/20553
Abstract: In a laser beam delivery system for an ophthalmic laser system, a single multi-use beam sampler is employed to form three sampled laser beams, including two for redundant laser energy monitoring and one for laser focal point depth measurement. The beam sampler is a transparent plate with preferably parallel front and back surfaces. The front surface reflects a fraction of the incoming beam to form the first sampled beam toward an energy monitoring detector. The back surface reflects another fraction of the beam to form a second sampled beam exiting backwardly from the front surface toward another energy monitoring detector. An objective lens focuses the transmitted beam onto a target, and collects back reflected or scattered light from the target to form a return beam. The back surface of the beam sampler reflects a fraction of the return beam to form the third sampled beam toward a third detector.
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公开(公告)号：US20240197532A1
公开(公告)日：2024-06-20
申请号：US18545930
申请日：2023-12-19
Applicant: AMO DEVELOPMENT, LLC
Inventor： Andrew Voorhees , Hong Fu , James Hill , Mohammad Saidur Rahaman , Wenzhi Gao , Brian Schwam , Paul Gray , Cynthia Villanueva , Deepali Mehta-Hurt , Jesse Nelson , Michal Laron
IPC: A61F9/008
CPC classification number: A61F9/008 , A61F2009/00842 , A61F2009/00872 , A61F2009/00897
Abstract: A method implemented in an ophthalmic surgical laser system that employs a resonant scanner, scan line rotator, and XY- and Z-scanners, for forming a corneal flap in a patient's eye with improved bubble management during each step of the flap creation process. A pocket cut is formed first below bed level, followed by the bed connected to the pocket cut, then by a side cut extending from the bed to the anterior corneal surface. The pocket cut includes a pocket region located below the bed level and a ramp region connecting the pocket region to the bed. The bed is formed by a bed cut, including multiple overlapping parallel raster scan passes, and a ring cut. The side cut is formed by multiple side-cut layers at different depths which are joined together. All cuts are formed by scanning a laser scan line generated by the resonant scanner.
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4.发明申请公开(公告)号：US20200289318A1
公开(公告)日：2020-09-17
申请号：US16355662
申请日：2019-03-15
Applicant: AMO Development, LLC
Inventor： Harvey I. Liu , Mohammad Saidur Rahaman , Hong Fu , Griffith E. Altmann
Abstract: An ophthalmic laser surgical system uses a confocal detector assembly to continuously detect a confocal signal during laser treatment, and based on the confocal signal, detects in real time a loss of tissue contact with the patient interface (PI) output surface. The detection is partly based on the change of reflectivity at the PI output surface when the optical interface changes from a lens-tissue interface to a lens-air interface. The behavior of the confocal signal upon loss of tissue contact is dependent on the treatment laser scan pattern being performed at the time of tissue contact loss. Thus, different confocal signal analysis algorithms are applied to detect tissue contact loss during different scans, such as the bed cut and side cut for a corneal flap. The real time confocal signal may also be used during eye docking to detect the establishment of tissue contact with the PI output surface.
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公开(公告)号：US12216272B2
公开(公告)日：2025-02-04
申请号：US18487027
申请日：2023-10-13
Applicant: AMO Development, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu , Roger W. Accurso , Zenon Witowski
Abstract: An ophthalmic laser system uses a non-confocal configuration to determine a laser beam focus position relative to the patient interface (PI) surface. The system includes a light intensity detector with no confocal lens or pinhole between the detector and the objective lens. When the objective focuses the light to a target focus point inside the PI lens at a particular offset from its distal surface, the light signal at the detector peaks. The offset value is determined by fixed system parameters, and can also be empirically determined by directly measuring the PI lens surface by observing the effect of plasma formation at the glass surface. During ophthalmic procedures, the laser focus is first scanned insider the PI lens, and the target focus point location is determined from the peak of the detector signal. The known offset value is then added to obtain the location of the PI lens surface.
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Patent Agency Ranking
公开(公告)号：US11957412B2
公开(公告)日：2024-04-16
申请号：US17057105
申请日：2019-11-11
Applicant: AMO Development, LLC
Inventor： Zenon Witowski , Mohammad Saidur Rahaman , Daryl Wong
CPC classification number: A61B3/145 , A61B3/0008 , A61F9/008 , A61F2009/00897
Abstract: An imaging system for an ophthalmic laser system includes a prism cone made of a transparent optical material and disposed downstream of the focusing objective lens of the ophthalmic laser system, the prism cone having an upper surface, a lower surface parallel to the upper surface, a tapered side surface between the upper and lower surfaces, and a beveled surface formed at an upper edge of the prism cone and intersecting the upper surface and the side surface, and a camera disposed adjacent to the prism cone and facing the beveled surface. The camera is disposed to directly receive light that enters the lower surface of the prism cone and exits the beveled surface without having been reflected by any surface.
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7.发明公开公开(公告)号：US20240118536A1
公开(公告)日：2024-04-11
申请号：US18487027
申请日：2023-10-13
Applicant: AMO Development, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu , Roger W. Accurso , Zenon Witowski
CPC classification number: G02B26/0875 , A61B3/13 , A61F9/008 , G01J1/4257 , G02B27/108 , A61F2009/00855 , A61F2009/00897
Abstract: An ophthalmic laser system uses a non-confocal configuration to determine a laser beam focus position relative to the patient interface (PI) surface. The system includes a light intensity detector with no confocal lens or pinhole between the detector and the objective lens. When the objective focuses the light to a target focus point inside the PI lens at a particular offset from its distal surface, the light signal at the detector peaks. The offset value is determined by fixed system parameters, and can also be empirically determined by directly measuring the PI lens surface by observing the effect of plasma formation at the glass surface. During ophthalmic procedures, the laser focus is first scanned insider the PI lens, and the target focus point location is determined from the peak of the detector signal. The known offset value is then added to obtain the location of the PI lens surface.
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公开(公告)号：US20220087862A1
公开(公告)日：2022-03-24
申请号：US17448175
申请日：2021-09-20
Applicant: AMO Development, LLC
Inventor： Mohammad Saidur Rahaman , Hong Fu
Abstract: In a laser beam delivery system for an ophthalmic laser system, a single multi-use beam sampler is employed to form three sampled laser beams, including two for redundant laser energy monitoring and one for laser focal point depth measurement. The beam sampler is a transparent plate with preferably parallel front and back surfaces. The front surface reflects a fraction of the incoming beam to form the first sampled beam toward an energy monitoring detector. The back surface reflects another fraction of the beam to form a second sampled beam exiting backwardly from the front surface toward another energy monitoring detector. An objective lens focuses the transmitted beam onto a target, and collects back reflected or scattered light from the target to form a return beam. The back surface of the beam sampler reflects a fraction of the return beam to form the third sampled beam toward a third detector.
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公开(公告)号：US11253398B2
公开(公告)日：2022-02-22
申请号：US15630629
申请日：2017-06-22
Applicant: AMO Development, LLC
Inventor： Alireza Malek Tabrizi , Hong Fu , James E. Hill , Mohammad Saidur Rahaman , Zenon Witowski
Abstract: Embodiments generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to form a top lenticular incision and a bottom lenticular incision of a lens in a corneal stroma.
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10.发明授权公开(公告)号：US10857031B2
公开(公告)日：2020-12-08
申请号：US15888997
申请日：2018-02-05
Applicant: AMO DEVELOPMENT, LLC
Inventor： Zenon J. Witowski , Mohammad Saidur Rahaman
Abstract: A femtosecond laser system for ophthalmic applications, which employs a number of chirped mirrors in the laser beam delivery system between the laser head and the objective lens. The chirped mirrors perform the dual function of both turning the laser beam in desired directions and compensating for beam broadening due to group delay dispersion (GDD) of the optical elements of the system. Each chirped mirror reflects the laser beam only once. Four chirped mirrors are used, each providing up to −5000 fs2 of negative GDD per bounce, to provide a total of −18,000 fs2 negative GDD to compensate for the positive GDD of +18,000 fs2 introduced by other optical elements in the laser beam delivery system. This eliminates the need for a pulse compressor that would employ a grating pair, prism pair or grism pair, and therefore significantly reduces the size of the system and the alignment requirements.
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