公开(公告)号：JP2008203244A

公开(公告)日：2008-09-04

申请号：JP2007330558

申请日：2007-12-21

Applicant: Alcon Inc ,  アルコン,インコーポレイティド

Inventor： GAO SHAWN X ,  WILLIAMS DAVID LLOYD ,  ROWE T SCOTT ,  AGAHI DARYUSH

IPC: G01F23/28 ,  A61F9/007

CPC classification number: A61M1/0023 ,  A61F9/00736 ,  A61M2205/3306 ,  A61M2205/3389 ,  G01F23/2921

Abstract: PROBLEM TO BE SOLVED: To provide even and parallel light curtain to solve the problem wherein a linear light source of high-resolution optical liquid level for continuous monitoring of a system generally uses high-diffusion LED array, in order to achieve even light intensity, as a result, it will have a very large visual angle that the rays, i.e., light beams no longer become parallel. SOLUTION: The point source is located on focal point of parabolic reflector to illuminate the parabolic reflector. The parabolic reflector reflects light from the point source to generate parallel light curtain. This parallel light curtain becomes parallel to the symmetric axis of the parabolic reflector, to illuminate ophthalmic surgery chamber for storing fluid. Sensor array, combined with the chamber, detects the parallel light curtain for illuminating the chamber and supplies an output to a sensing, processing, control system in order to determine the liquid level of the chamber. This optical method for determining the liquid level of surgical fluid has the advantage of preventing surgical fluid from physical contamination. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：为了提供均匀和平行的光幕来解决用于连续监视系统的高分辨率光学液位的线性光源通常使用高扩散LED阵列的问题，以便实现均匀 因此，光强度将会有非常大的视角，即光束即光束不再平行。 解决方案：点源位于抛物面反射器的焦点上，以照射抛物面反射器。 抛物面反射器反射来自点源的光以产生平行光幕。 该平行光幕变得平行于抛物面反射器的对称轴，以照射眼科手术室以存储流体。 传感器阵列与腔室结合，检测平行光幕以照射腔室，并将输出提供给感测，处理，控制系统，以确定腔室的液位。 这种用于确定手术液体的液位的光学方法具有防止手术液体物理污染的优点。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：DE602007006138D1

公开(公告)日：2010-06-10

申请号：DE602007006138

申请日：2007-12-14

Applicant: ALCON INC

Inventor： GAO SHAWN X ,  WILLIAMS DAVID LLOYD ,  ROWE SCOTT T ,  AGAHI DARYUSH

IPC: A61F9/00 ,  A61F9/007 ,  G01F23/292 ,  G01N35/10

Abstract: A continuous high resolution fluid level monitoring system (300) is provided by embodiments of the present invention. This continuous high resolution fluid level monitoring system includes a unique fluid level sensor having a point light source (202), parabolic reflector (204), sensor array (308), and detection, processing and control system (310). The point light source illumines a parabolic reflector wherein the point light source is located at the focus of the parabolic reflector. The parabolic reflector reflects light from the point light source to produce a parallel light curtain (210). This parallel light curtain is parallel to an axis of symmetry of the parabolic reflector. The parallel light curtain illumines a chamber (302) such as a chamber in an ophthalmic surgical device used to contain surgical fluid (304). The sensor array coupled to the chamber detects the parallel light curtain illuminating the chamber. The sensor array provides an output to a detection/processing/control system in order to determine the fluid level within the chamber. This optical method of determining the surgical fluid levels may be advantageous in that it prevents physical contamination of the surgical fluids.

公开(公告)号：CA2615073A1

公开(公告)日：2008-06-22

申请号：CA2615073

申请日：2007-12-17

Applicant: ALCON INC

Inventor： WILLIAMS DAVID LLOYD ,  GAO SHAWN X ,  AGAHI DARYUSH ,  ROWE T SCOTT

IPC: G01F23/292 ,  A61F9/007

Abstract: A continuous high resolution fluid level monitoring system (300) is provided by embodiments of the present invention. This continuous high resolution fluid level monitoring system includes a unique fluid level sensor having a point light source (202), parabolic reflector (204), sensor array (308), and detection, processing and control system (310). The point light source illumines a parabolic reflector wherein the point light source is located at the focus of the parabolic reflector. The parabolic reflector reflects light from the point light source to produce a parallel light curtain (210). This parallel light curtain is parallel to an axis of symmetry of the parabolic reflector. The parallel light curtain illumines a chamber (302) such as a chamber in an ophthalmic surgical device used to contain surgical fluid (304). The sensor array coupled to the chamber detects the parallel light curtain illuminating the chamber. The sensor array provides an output to a detection/processing/control system in order to determine the fluid level within the chamber. This optical method of determining the surgical fluid levels may be advantageous in that it prevents physical contamination of the surgical fluids.

公开(公告)号：AT465706T

公开(公告)日：2010-05-15

申请号：AT07123297

申请日：2007-12-14

Applicant: ALCON INC

Inventor： GAO SHAWN X ,  WILLIAMS DAVID LLOYD ,  ROWE T SCOTT ,  AGAHI DARYUSH

IPC: A61F9/00 ,  A61F9/007 ,  G01F23/292 ,  G01N35/10

Abstract: A continuous high resolution fluid level monitoring system (300) is provided by embodiments of the present invention. This continuous high resolution fluid level monitoring system includes a unique fluid level sensor having a point light source (202), parabolic reflector (204), sensor array (308), and detection, processing and control system (310). The point light source illumines a parabolic reflector wherein the point light source is located at the focus of the parabolic reflector. The parabolic reflector reflects light from the point light source to produce a parallel light curtain (210). This parallel light curtain is parallel to an axis of symmetry of the parabolic reflector. The parallel light curtain illumines a chamber (302) such as a chamber in an ophthalmic surgical device used to contain surgical fluid (304). The sensor array coupled to the chamber detects the parallel light curtain illuminating the chamber. The sensor array provides an output to a detection/processing/control system in order to determine the fluid level within the chamber. This optical method of determining the surgical fluid levels may be advantageous in that it prevents physical contamination of the surgical fluids.

公开(公告)号：AU2019398860A8

公开(公告)日：2021-06-17

申请号：AU2019398860

申请日：2019-11-15

Applicant: ALCON INC

Inventor： ZHOU JIANSHENG ,  AGAHI DARYUSH

IPC: A61F9/007

Abstract: Systems and methods for optimizing the application of pulse width modulation (PWM) in a voltage signal for delivering a current in a valve used to alternatively deliver pressurized gas to and vent from chambers in a vitrectomy probe used to drive a cutter.

公开(公告)号：ES2342434T3

公开(公告)日：2010-07-06

申请号：ES07123297

申请日：2007-12-14

Applicant: ALCON INC

Inventor： GAO SHAWN X ,  WILLIAMS DAVID LLOYD ,  ROWE T SCOTT ,  AGAHI DARYUSH

IPC: A61F9/00 ,  A61F9/007 ,  G01F23/292 ,  G01N35/10

Abstract: Procedimiento para determinar un nivel de fluido dentro de una cámara (302), comprendiendo el procedimiento: colocar (402) una fuente de luz puntual (202) en un foco de un reflector parabólico (204); iluminar (404) el reflector parabólico con la fuente de luz puntual; reflejar (406) luz (208) desde el reflector parabólico para producir una cortina de luz paralela (210) paralela a un eje de simetría del reflector parabólico; iluminar horizontalmente (408) la cámara (302) que contiene un fluido (304) con la cortina de luz paralela que tiene rayos de luz paralelos (214); y determinar (410) un nivel de fluido dentro de la cámara con una agrupación lineal de sensores (308) dispuestas para detectar la cortina de luz paralela con el fin de indicar la altura a la cual la agrupación detectó un cambio sustancial en la intensidad de luz recibida.

公开(公告)号：AU2019398860B2

公开(公告)日：2025-04-10

申请号：AU2019398860

申请日：2019-11-15

Applicant: ALCON INC

Inventor： ZHOU JIANSHENG ,  AGAHI DARYUSH

IPC: A61F9/007

Abstract: Systems and methods for optimizing the application of pulse width modulation (PWM) in a voltage signal for delivering a current in a valve used to alternatively deliver pressurized gas to and vent from chambers in a vitrectomy probe used to drive a cutter.

公开(公告)号：CA3117863A1

公开(公告)日：2020-06-18

申请号：CA3117863

申请日：2019-11-15

Applicant: ALCON INC

Inventor： ZHOU JIANSHENG ,  AGAHI DARYUSH

IPC: A61F9/007

Abstract: Systems and methods for optimizing the application of pulse width modulation (PWM) in a voltage signal for delivering a current in a valve used to alternatively deliver pressurized gas to and vent from chambers in a vitrectomy probe used to drive a cutter.

公开(公告)号：AU2010328638B2

公开(公告)日：2015-12-24

申请号：AU2010328638

申请日：2010-11-02

Applicant: ALCON INC

Inventor： AGAHI DARYUSH

IPC: G05B13/02

Abstract: In some embodiments, a method of using feedforward to control a system component may include determining if a feedforward term exists in a feedforward table for a received operating set point. If a feedforward term does not exist, the system component may be incremented until the system to within a first acceptable tolerance of the desired set point. In some embodiments, a measure of steady state error may be determined and compared to a second acceptable tolerance. If within the acceptable tolerance, the corresponding feedforward term may be recorded in the feedforward table. In some embodiments, if the feedforward term exists for the operating set point, the system component may be controlled using controller output that corresponds to the feedforward term. When a change to the system is detected that is associated with possible changes to the feedforward values, new feedforward values may be generated for the feedforward table.

公开(公告)号：AU2011258776B2

公开(公告)日：2015-06-11

申请号：AU2011258776

申请日：2011-05-02

Applicant: ALCON INC

Inventor： AGAHI DARYUSH

IPC: A61B17/00

Abstract: A surgical system having feedback control for pneumatic actuators includes a pneumatic pressure source and a vitrectomy cutter having a cutting mechanism, a first pneumatic input port, and a second pneumatic input port. A pneumatic actuator is configured to direct pneumatic pressure to one of the first and second pneumatic input ports. A first pressure transducer is located and configured to detect actual pressure at the first pneumatic input port, and a second pressure transducer is located and configured to detect actual pressure at the second pneumatic input port. A controller communicates with the first and second pressure transducers and the pneumatic actuator. It is configured to change the pneumatic actuator actuation timing based on the data communicated from the first and second pressure transducers.