公开(公告)号：US20200350846A1

公开(公告)日：2020-11-05

申请号：US16864794

申请日：2020-05-01

Applicant: Canon U.S.A., Inc.

Inventor： Badr Elmaanaoui ,  Alexander Altshuler ,  Pierre-Yves Mabboux

IPC: H02P23/24

Abstract: System, apparatus, and methods for controlling a motor by using servo-to-edge direction feedback are disclosed. An exemplary apparatus comprises: a fiber optic rotary junction (FORJ) having a rotatable portion; a motor to rotate the rotatable portion; a connector to connect the rotatable portion to a rotatable fiber of an imaging probe; a sensor positioned in close proximity to a target and configured to output a signal indicative of which one of at least two distinguishable regions of the target is proximal to the sensor; and a controller configured to control the rotational direction of the motor based on the sensor signal. In one embodiment, the motor is a servo-motor, and the rotation of the motor and/or rotatable portion is controlled by a servo-loop to change the rotation direction of the motor back-and-forth around a predetermined rotational position without the use of an encoder.

公开(公告)号：US11502633B2

公开(公告)日：2022-11-15

申请号：US16864794

申请日：2020-05-01

Applicant: Canon U.S.A., Inc.

Inventor： Badr Elmaanaoui ,  Alexander Altshuler ,  Pierre-Yves Mabboux

IPC: H02P23/24

Abstract: System, apparatus, and methods for controlling a motor by using servo-to-edge direction feedback are disclosed. An exemplary apparatus comprises: a fiber optic rotary junction (FORJ) having a rotatable portion; a motor to rotate the rotatable portion; a connector to connect the rotatable portion to a rotatable fiber of an imaging probe; a sensor positioned in close proximity to a target and configured to output a signal indicative of which one of at least two distinguishable regions of the target is proximal to the sensor; and a controller configured to control the rotational direction of the motor based on the sensor signal. In one embodiment, the motor is a servo-motor, and the rotation of the motor and/or rotatable portion is controlled by a servo-loop to change the rotation direction of the motor back-and-forth around a predetermined rotational position without the use of an encoder.

公开(公告)号：US11175126B2

公开(公告)日：2021-11-16

申请号：US16823164

申请日：2020-03-18

Applicant: Canon U.S.A., Inc.

Inventor： Badr Elmaanaoui ,  Matthew Scott Pias ,  Pierre-Yves Mabboux

IPC: G01B9/02 ,  A61B3/10

Abstract: One or more devices, systems, methods and storage mediums for optical imaging medical devices, such as, but not limited to, Optical Coherence Tomography (OCT), single mode OCT, and/or multi-modal OCT apparatuses and systems, and methods and storage mediums for use with same, for performing automated polarization control, polarization diversity and/or balanced detection are provided herein. One or more embodiments may achieve polarization diversity and balanced detection (or photo-detection) under any imaging circumstances. One or more embodiments, may achieve polarization control functionality regardless of whether such control is automatic or manual. Additionally, one or more embodiments may achieve automated polarization control, may achieve balanced detection (or photo-detection), and/or may address potential disturbances, such as, but not limited to, polarization drift over time, temperature and/or mechanical perturbations or variations. One or more embodiments may include an optical receiver where polarization diversity and balanced detection may be optimized via motorized controls.

公开(公告)号：US20200318944A1

公开(公告)日：2020-10-08

申请号：US16823164

申请日：2020-03-18

Applicant: Canon U.S.A., Inc.

Inventor： Badr Elmaanaoui ,  Matthew Scott Pias ,  Pierre-Yves Mabboux

IPC: G01B9/02

Abstract: One or more devices, systems, methods and storage mediums for optical imaging medical devices, such as, but not limited to, Optical Coherence Tomography (OCT), single mode OCT, and/or multi-modal OCT apparatuses and systems, and methods and storage mediums for use with same, for performing automated polarization control, polarization diversity and/or balanced detection are provided herein. One or more embodiments may achieve polarization diversity and balanced detection (or photo-detection) under any imaging circumstances. One or more embodiments, may achieve polarization control functionality regardless of whether such control is automatic or manual. Additionally, one or more embodiments may achieve automated polarization control, may achieve balanced detection (or photo-detection), and/or may address potential disturbances, such as, but not limited to, polarization drift over time, temperature and/or mechanical perturbations or variations. One or more embodiments may include an optical receiver where polarization diversity and balanced detection may be optimized via motorized controls.