CN-115135229-B - Rotation guidance for optical imaging device

Abstract

A method of aligning an imaging device comprising two or more optical channels with respect to an object is disclosed. The method may include aligning two or more light channels with corresponding overlapping regions of the object such that the two or more light channels are positioned at different angles from one another and off-axis relative to a central axis of the imaging device. The method may further comprise guiding or focusing the imaging device relative to the object using a composite image created by combining separate images of the two or more light channels.

Inventors

• B. Hamel-Bissell
• B.A. Jacobson
• C. Susen
• C. Pentico
• A.E. Adams
• T.M. Langhold

Assignees

• 奥普托斯股份有限公司

Dates

Publication Date

20260508

Application Date

20200723

Priority Date

20190723

Claims (18)

1. 1. A method of aligning an imaging device relative to an eye, the imaging device comprising two or more light channels, wherein each light channel comprises an illumination source and an image capture device, the method comprising: Aligning the two or more light channels with corresponding overlapping regions of the eye such that the two or more light channels are positioned at different angles from each other and are off-axis with respect to a central axis of the imaging device, wherein a field of view of the two or more light channels is divided into intersecting channel regions, inner peripheral region and outer peripheral region that differ in imaging and/or illumination means, and Directing or focusing the imaging device with respect to the eye using a composite image created by combining separate images of the two or more light channels, wherein the imaging device is directed or focused with respect to the eye by: Illuminating the eye at a first distance from the imaging device to the eye to produce a reflection, Illuminating the eye at a second distance from the imaging device to the eye, the second distance being shorter than the first distance, When the imaging device is disposed at a first distance from the eye, an initial guidance of the imaging device is performed based on the illumination and the composite image representing the inner peripheral region of the field of view, After the initial guiding, when the imaging device is shifted from the first distance to the second distance, performing a second guiding of the imaging device according to the illumination and the synthesized image representing the outer peripheral area of the field of view, and After the second directing, a third directing of the imaging device is performed in accordance with an illumination and a composite image of a cross-channel region representing the field of view, wherein the cross-channel region includes at least one of the overlapping regions.
2. 2. The method of claim 1, further comprising centering the imaging device using images of an outer periphery and an inner periphery of a field of view of the light channel.
3. 3. The method of claim 2, wherein the images of the outer and inner peripheral edges are used to generate the composite image.
4. 4. The method of claim 1, wherein the imaging device is aligned using corneal reflections from the two or more light channels illuminating the cornea.
5. 5. The method of claim 4, wherein a fixed target is located between the light channels, the fixed target comprising a target in which the eye is focused when the eye is imaged.
6. 6. The method of claim 1, wherein the two or more light channels comprise a first light channel and a second light channel, and wherein directing or focusing the imaging device comprises: Illuminating the cross-channel region of the first optical channel through the second optical channel, and Capturing one of the individual images as an intersecting channel image of the intersecting channel region of the first optical channel by the first optical channel when the second optical channel irradiates the intersecting channel region, Wherein the cross-channel image is used to generate the composite image.
7. 7. The method of claim 6, further comprising illuminating at least one of an outer periphery and an inner periphery of a field of view of the first light channel when the second light channel illuminates the cross-channel region.
8. 8. The method of claim 6, further comprising: illuminating a second cross-channel region of the second optical channel through the first optical channel after capturing the cross-channel image; capturing a second cross-channel image of the second cross-channel region of the second optical channel through the second optical channel when the first optical channel irradiates the second cross-channel region, and A second composite image is generated using the second cross-channel image.
9. 9. The method of claim 8, further comprising updating a display that previously presented one or more of the composite images to the second composite image to create video on the display.
10. 10. The method of claim 9, further comprising repeatedly generating additional composite images and updating the display with the additional composite images, wherein updating the display produces a rotation effect as different regions of the video are updated based on which of the two or more light channels captured a sub-image to produce the additional composite images.
11. 11. The method of claim 1, wherein directing or focusing the imaging device comprises simultaneously displaying a first sub-combination image representing a cross-channel region of the field of view and a second sub-combination image representing an outer peripheral region of the field of view.
12. 12. The method of claim 1, wherein directing or focusing the imaging device comprises simultaneously displaying a first sub-combination image representing a cross-channel region of the field of view and an indirect graphic based on an outer peripheral region of the field of view.
13. 13. The method of claim 12, wherein the indirection graphic includes at least one of a status bar and a dot within a circle.
14. 14. A method of aligning an imaging device relative to an eye, the imaging device comprising two or more light channels, wherein each light channel comprises an illumination source and an image capture device, the method comprising: Aligning the two or more light channels with corresponding overlapping regions of the eye such that the two or more light channels are positioned at different angles from each other and are off-axis with respect to a central axis of the imaging device, wherein a field of view of the two or more light channels is divided into intersecting channel regions, inner peripheral region and outer peripheral region that differ in imaging and/or illumination means, and Directing or focusing the imaging device with respect to the eye using a composite image created by combining separate images of the two or more light channels, wherein the imaging device is directed or focused with respect to the eye by: Illuminating the cornea of the eye through the two or more light channels at a first distance from the imaging device to the eye to produce a corneal reflection, When the imaging device is a first distance from the eye, performing an initial guidance based on the corneal reflection; When the imaging device is shifted from a first distance from the eye to a second distance closer to the eye than the first distance, performing a secondary guidance based on a first combined image representing at least an inner peripheral area and an outer peripheral area of the field of view, and When the imaging device is at a second distance from the eye, final directing or focusing is performed according to a second combined image representing the intersecting channel region and the inner peripheral region of the field of view.
15. 15. The method of claim 14, wherein a fixed target is located between the light channels, the fixed target comprising a target in which the eye is focused when the eye is imaged.
16. 16. The method of claim 14, wherein the images from the outer peripheral edge margin and inner peripheral edge margin are used to generate the composite image.
17. 17. The method of claim 14, wherein the directing or focusing is performed manually by a user of the imaging device.
18. 18. The method of claim 15, wherein the fixed target is synchronized with the illumination of the two or more light channels.

Description

Rotation guidance for optical imaging device Technical Field The present application relates generally to methods for guiding and aligning an optical imaging system. Background Conventional fundus cameras have a single imaging path and provide real-time video from a single sensor that is also used to capture still images. The imaging path is used to provide real-time video at a guiding or alignment stage prior to image acquisition. In order for video guidance to be useful, the guidance video should provide feedback to the operator regarding centering and alignment, as well as image focus and quality. The claimed subject matter is not limited to embodiments that solve any disadvantages or that operate only in environments such as those described above. Rather, the background is provided only to illustrate one exemplary technology area in which some embodiments of the invention described herein may be practiced. Disclosure of Invention Example 1-one or more embodiments of the present disclosure may include a method of aligning an imaging device relative to an object. The imaging device includes two or more light channels. The method may include aligning two or more light channels with corresponding overlapping regions of the object such that the two or more light channels are positioned at different angles from one another and off-axis relative to a central axis of the imaging device. The method may further comprise guiding or focusing the imaging device relative to the object using a composite image created by combining separate images from two or more light channels. Example 2-according to one or more embodiments of the disclosure, any of the methods of the disclosure, e.g., the method in example 1, may further include centering the imaging device using images from the outer and inner circumferences of the light tunnel field of view. Example 3-in accordance with one or more embodiments of the present disclosure, any of the methods of the present disclosure, such as the method in example 2, images from the outer periphery and the inner periphery may be used to generate a composite image. Example 4-according to one or more embodiments of the present disclosure, any of the methods of the present disclosure, e.g., the methods of examples 1-3, the object to be imaged is an eye, and the corneal reflection resulting from illuminating the cornea with two or more light channels is directed to an imaging apparatus. Example 5-according to one or more embodiments of the present disclosure, any of the methods of the present disclosure, e.g., the method of example 4, a fixation target is located between the light channels, the fixation target comprising a target that focuses the eye when imaging the eye. Example 6-according to one or more embodiments of the present disclosure, any method of the present disclosure, e.g., the method of examples 1-5, the two or more light channels comprise a first light channel and a second light channel, the guiding or focusing imaging device further comprises illuminating an intersecting channel region of the first light channel through the second light channel, and capturing, by the first light channel, one of the separate images as an intersecting channel image of the intersecting channel region of the first light channel when the second light channel illuminates the intersecting channel region, wherein the intersecting channel image is used to generate the composite image. Example 7-according to one or more embodiments of the disclosure, any method of the disclosure, e.g., the method in example 6, may further include illuminating at least one of an outer perimeter and an inner perimeter of the field of view of the first optical channel when the second optical channel illuminates the cross-channel region. Example 8-according to one or more embodiments of the disclosure, any of the methods of the disclosure, e.g., the method in example 6 or 7, may further include illuminating the second cross-channel region of the second optical channel through the first optical channel after capturing the cross-channel image. The method may further include capturing a second cross-channel image of a second cross-channel region of the second optical channel through the second optical channel while the first optical channel irradiates the second cross-channel region, and generating a second composite image using the second cross-channel image. Example 9-according to one or more embodiments of the disclosure, any of the methods of the disclosure, e.g., the method of example 8, may further include updating a display that previously presented the one or more composite images to the second composite image to create a video on the display. Example 10-according to one or more embodiments of the disclosure, any of the methods of the disclosure, e.g., the method of example 9, may further include repeatedly generating additional composite images and updating the display with the additional composite images, wherei