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公开(公告)号：US11692906B2
公开(公告)日：2023-07-04
申请号：US17443626
申请日：2021-07-27
Applicant: ALCON INC.
Inventor： Thomas Tonn
IPC: G01M11/02 , G01B9/02091 , G01B11/24 , G06T7/62 , G06T7/13
CPC classification number: G01M11/0271 , G01B9/02091 , G01B11/2441 , G01M11/025 , G06T7/13 , G06T7/62 , G06T2207/10101
Abstract: A method for determining geometrical parameters of a soft contact lens comprises the steps of
providing an OCT imaging device comprising an OCT light source;
providing a soft contact lens
arranging the soft contact lens relative to the OCT imaging device so light coming from the OCT light source impinges on the back surface of the soft contact lens;
generating a three-dimensional OCT image of the soft contact lens;
from the three-dimensional OCT image determining a plurality of edge points located on the edge of the soft contact lens,
connecting adjacent ones of the edge points by individual straight lines;
summing up the lengths of all individual straight lines to a length U of the approximated circumference of the soft contact lens;
from the length U determining a diameter D of the lens according to D=U/π.-
公开(公告)号：US12083728B2
公开(公告)日：2024-09-10
申请号：US17652729
申请日：2022-02-28
Applicant: ALCON INC.
Inventor： Jan Bernard , Michael Stutz , Thomas Tonn
CPC classification number: B29C45/842 , B29C45/14 , B29C45/2675 , B29C45/80 , B29D11/00951 , G02B21/0016 , B29C2945/76096 , B29C2945/76294 , B29C2945/76461 , B29C2945/76943 , B29D11/0048 , B29L2011/0041
Abstract: To achieve molding insert is properly mounted to the tooling plate of the injection molding machine, a sensor head comprising confocal sensors is used. The sensor heads are placed on the tooling plate at the respective position to determine whether the desired mold insert has been mounted to that position and whether the desired mold insert has been precisely and accurately mounted to the tooling plate.
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Patent Agency Ranking
公开(公告)号：US12083756B2
公开(公告)日：2024-09-10
申请号：US17398280
申请日：2021-08-10
Applicant: ALCON INC.
Inventor： Matthias Schwab , Udo Schuessler , Steffen Lieb , Eduard Jetzlaff , Jan Bernard , Halina Heidrich , Thomas Tonn
CPC classification number: B29D11/00538 , B25J15/0047 , B25J15/0616 , B29C31/006 , B29C33/303 , B29D11/00019 , B29D11/00173 , B29D11/0023 , B29D11/00509 , B29D11/00528 , B29L2011/0016 , B29L2011/0025 , B29L2011/0041
Abstract: A method of providing a male mold half for molding a toric contact lens at a predetermined target rotational orientation is disclosed. The method comprises the steps of: —providing the male mold half at a predetermined rotational orientation, —picking the male mold half up with a gripper having a central axis, —rotating the gripper with the male mold half about the central axis of the gripper by a predetermined rotational angle (α) towards the predetermined target rotational orientation, and —releasing the rotated male mold half from the gripper. Prior to picking the male mold half up, the method comprises centering the grippe and the male mold half relative to each other such that the central axis of the gripper and a central axis of the male mold half coincide.
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公开(公告)号：US20220274307A1
公开(公告)日：2022-09-01
申请号：US17652729
申请日：2022-02-28
Applicant: ALCON INC.
Inventor： Jan Bernard , Michael Stutz , Thomas Tonn
Abstract: A method for verifying whether a molding insert (1a, 1b) is accurately mounted to a tooling plate (2a, 2b) comprises the steps of: a) providing a confocal sensor (3a, 3b); b) arranging the confocal sensor (3a, 3b) such that a confocal sensor reference plane (32a, 32b) as well as a tooling plate reference plane (22a, 22b) are normal to a mounting axis (21a, 21b) of the tooling plate and spaced from each other by a predetermined first distance (d1, e1); c) measuring a second distance (d2, e2) between the confocal sensor reference plane (32a, 32b) and a central impingement location (11a, 11b) on a molding surface (12a, 12b) of the molding insert (1a, 1b); d) based on the measured second distance (d2, e2) as well as based on the predetermined first distance (d1, e1), determining a third distance (d3, e3) of the central impingement location (11a, 11b) relative to the tooling plate reference plane (22a, 22b); e) comparing the third distance (d3, e3) with a predetermined target distance, and f) determining that the molding insert (1a, 1b) is accurately mounted to the tooling plate (2a, 2b) if the difference between the third distance (d3, e3) and the predetermined target distance is less than a threshold difference.
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公开(公告)号：US20220034752A1
公开(公告)日：2022-02-03
申请号：US17443626
申请日：2021-07-27
Applicant: ALCON INC.
Inventor： Thomas Tonn
Abstract: A method for determining geometrical parameters of a soft contact lens comprises the steps of providing an OCT imaging device comprising an OCT light source; providing a soft contact lens arranging the soft contact lens relative to the OCT imaging device so light coming from the OCT light source impinges on the back surface of the soft contact lens; generating a three-dimensional OCT image of the soft contact lens; from the three-dimensional OCT image determining a plurality of edge points located on the edge of the soft contact lens, connecting adjacent ones of the edge points by individual straight lines; summing up the lengths of all individual straight lines to a length U of the approximated circumference of the soft contact lens; from the length U determining a diameter D of the lens according to D=U/π.
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6.发明申请公开(公告)号：US20200164555A1
公开(公告)日：2020-05-28
申请号：US16694317
申请日：2019-11-25
Applicant: Alcon Inc.
Inventor： Thomas Tonn , Jan Bernard , Halina Heidrich , Eduard Jetzlaff , Yasin Acikgoez , Maricel Teresa Repetto , Matthias Schwab
Abstract: An injection molding apparatus for manufacturing an ophthalmic lens mold having a front surface comprising a lens forming portion and a rear surface, comprises a first molding tool and a second molding tool. The first and second molding tools are movable towards and away from each other between a closed position and an open position. In the closed position the first mold forming portion of the first molding tool and the second mold forming portion of the second molding tool define a cavity between them corresponding in shape to the shape of the ophthalmic lens mold. The surface of the second mold forming portion, at least in a central zone thereof, has a surface roughness Sa in the range of 0.3 μm to 2 μm, and a surface roughness Sz in the range of 10 μm to 50 μm.
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公开(公告)号：US11794386B2
公开(公告)日：2023-10-24
申请号：US16694317
申请日：2019-11-25
Applicant: Alcon Inc.
Inventor： Thomas Tonn , Jan Bernard , Halina Heidrich , Eduard Jetzlaff , Yasin Acikgoez , Maricel Teresa Repetto , Matthias Schwab
CPC classification number: B29C45/0416 , B29C45/4005 , B29K2023/12 , B29L2011/0041
Abstract: An injection molding apparatus for manufacturing an ophthalmic lens mold having a front surface comprising a lens forming portion and a rear surface, comprises a first molding tool and a second molding tool. The first and second molding tools are movable towards and away from each other between a closed position and an open position. In the closed position the first mold forming portion of the first molding tool and the second mold forming portion of the second molding tool define a cavity between them corresponding in shape to the shape of the ophthalmic lens mold. The surface of the second mold forming portion, at least in a central zone thereof, has a surface roughness Sa in the range of 0.3 μm to 2 μm, and a surface roughness Sz in the range of 10 μm to 50 μm.
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