Head-mounted ophthalmic OCTA device

Abstract

The present invention discloses a head-mounted ophthalmic OCTA device. The head-mounted ophthalmic OCTA device includes: a head-mounted shell, an optical path system and an adjustment mechanism, the adjustment mechanism is in transmission cooperation with the optical path system, and is at least used to move the optical path system to a specified position; wherein, the optical path system includes an imaging optical path and an auxiliary alignment optical path, the imaging optical path is at least used to collect image information of the detected eyeball, and the auxiliary alignment optical path is at least used to guide the gaze point position of the detected eyeball so that the detected eyeball is aligned in the pupil distance direction. The display screen used in the head-mounted ophthalmic OCT device (probe) provided by the present invention can display different static or dynamic images, and the image is flexible and changeable, which can meet the requirements of different types of detected objects, and can make the two eyes of the detected object look at the display screen at the same time, guide the gaze point of the eyeball of the detected object to be aligned, thereby alleviating the fatigue when using single-eye gaze.

Description

Technical Field

[0001] The present invention particularly relates to a head-mounted ophthalmic OCTA device, belonging to the technical field of scanning imaging. Background Art

[0002] Optical coherence tomography angiography (OCTA) is a new, non-invasive fundus imaging technique that can identify retinal choroidal blood flow at high resolution. It offers unique advantages in the management and follow-up of retinal choroidal vascular changes and disease, as well as in monitoring treatment efficacy. In recent years, it has been widely used in the diagnosis and treatment of ophthalmic diseases, including retinal vascular disease, glaucoma, and diabetic retinopathy.

[0003] Currently, commercial ophthalmic OCTA equipment is bulky, requires specialized diagnostic conditions, and is not easily portable. During data collection, the subject sits upright in front of the device, their chin secured in a forehead rest, and the probe is adjusted to align accurately with the subject's eyeball. The subject must remain still for several minutes to complete data collection. Data collection is particularly limited for special populations, such as infants, critically ill bedridden patients, those under anesthesia, and those unable to maintain the required posture or immobility.

[0004] At present, in order to address this shortcoming, various handheld OCTA probes have been developed on the market for clinical applications (for example, a handheld OCT probe and OCT measurement system disclosed in CN202699100U). However, during the operation of such handheld OCT probes, the doctor needs to hold the device to focus. However, on the one hand, there is hand shaking when the operator holds the device; on the other hand, the person being collected needs to keep the body still, especially the head still, which will bring imaging problems such as difficulty in collecting data and image motion artifacts during the data collection process. Summary of the Invention

[0005] The main purpose of the present invention is to provide a head-mounted ophthalmic OCTA device to overcome the deficiencies in the prior art.

[0006] To achieve the aforementioned object of the invention, the technical solutions adopted by the present invention include:

[0007] An embodiment of the present invention provides a head-mounted ophthalmic OCTA device, comprising: a head-mounted housing, an optical path system, and an adjustment mechanism, wherein the adjustment mechanism is in transmission cooperation with the optical path system and is at least used to move the optical path system to a specified position;

[0008] Among them, the optical path system includes an imaging optical path and an auxiliary alignment optical path. The imaging optical path is at least used to collect image information of the detected eyeball, and the auxiliary alignment optical path is at least used to guide the gaze point position of the detected eyeball so that the detected eyeball is aligned in the pupil distance direction.

[0009] Furthermore, the imaging optical path includes a laser collimator, a focus-adjustable lens, a two-dimensional scanning galvanometer, a first lens, a first dichroic mirror, a reflector and an eyepiece lens. The light beam from the light source passes through the laser collimator and the focus-adjustable lens in sequence and is incident on the two-dimensional scanning galvanometer. After being reflected by the two-dimensional scanning galvanometer, it passes through the first lens and is incident on the first dichroic mirror. After being reflected by the first dichroic mirror and the reflector in sequence, it is incident on the eyepiece lens. After being magnified by the eyepiece lens, it enters the eyeball of the subject being tested.

[0010] Compared with the prior art, the advantages of the present invention include:

[0011] 1) The present invention provides a head-mounted ophthalmic OCT device (probe). An OCTA scanner is worn on the head of a subject for examination. The head-mounted OCT device (probe) can remain stationary or move synchronously with the subject, thereby resolving the focusing difficulties associated with conventional or handheld OCTA devices due to the subject's head shaking. This effectively mitigates motion artifacts and improves detection accuracy.

[0012] 2) The display screen used in a head-mounted ophthalmic OCT device (probe) provided in an embodiment of the present invention can display various static or dynamic images. The flexible and diverse images can meet the requirements of different types of subjects. The device also allows the subject to simultaneously focus both eyes on the display screen, guiding the subject's eyeballs to align their gaze, thereby alleviating the fatigue experienced when using monocular gaze.

[0013] 3) The head-mounted ophthalmic OCT device (probe) provided in an embodiment of the present invention adopts a head-mounted structure that is compact and easy to wear. After the subject puts it on, special patients whose hands can move normally can also adjust the buttons themselves for alignment, freeing the staff's hands and facilitating the staff's operation of other equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an axonometric diagram of a head-mounted ophthalmic OCTA probe provided in a typical embodiment of the present invention;

[0015] Figure 2 It is a structural schematic diagram of a cross slide adjustment mechanism provided in a typical embodiment of the present invention;

[0016] Figure 3It is a structural diagram of the cooperation between the optical path system and the cross slide mechanism in a typical embodiment of the present invention;

[0017] Figure 4 A schematic structural diagram of an optical path system in a typical embodiment of the present invention. DETAILED DESCRIPTION

[0018] In view of the shortcomings of the prior art, the inventors of this case, after long-term research and extensive practice, have proposed the technical solution of the present invention. The following will further explain this technical solution, its implementation process and principles.

[0019] An embodiment of the present invention provides a head-mounted ophthalmic OCTA device, comprising: a head-mounted housing, an optical path system, and an adjustment mechanism, wherein the adjustment mechanism is in transmission cooperation with the optical path system and is at least used to move the optical path system to a specified position;

[0020] Among them, the optical path system includes an imaging optical path and an auxiliary alignment optical path. The imaging optical path is at least used to collect image information of the detected eyeball, and the auxiliary alignment optical path is at least used to guide the gaze point position of the detected eyeball so that the detected eyeball is aligned in the pupil distance direction.

[0021] Furthermore, the imaging optical path includes a laser collimator, a focus-adjustable lens, a two-dimensional scanning galvanometer, a first lens, a first dichroic mirror, a reflector and an eyepiece lens. The light beam from the light source passes through the laser collimator and the focus-adjustable lens in sequence and is incident on the two-dimensional scanning galvanometer. After being reflected by the two-dimensional scanning galvanometer, it passes through the first lens and is incident on the first dichroic mirror. After being reflected by the first dichroic mirror and the reflector in sequence, it is incident on the eyepiece lens. After being magnified by the eyepiece lens, it enters the eyeball of the subject being tested.

[0022] Furthermore, the auxiliary alignment optical path includes a display screen, a second dichroic mirror, a second lens, a first dichroic mirror, a reflector, and an eyepiece lens. A portion of the image beam from the display screen is reflected by the second dichroic mirror, passes through the first dichroic mirror, and is incident on the reflector. After being reflected by the reflector, it is incident on the eyepiece lens, and after being magnified by the eyepiece lens, it enters the eyeball of the subject being tested.

[0023] At the same time, another part of the image light beam from the display screen passes through the second dichroic mirror and the second lens in sequence and enters the other undetected eyeball of the detected eye.

[0024] Furthermore, the adjustment mechanism includes a first adjustment mechanism and a second adjustment mechanism, wherein the first adjustment mechanism is at least used to drive the optical path system to move along a first direction to at least adjust the focal length between the eyepiece lens and the eyeball to be detected; the second adjustment mechanism is at least used to drive the optical path system to move along a second direction to align the optical path system with the eyeball to be detected in the pupil distance direction.

[0025] Furthermore, the first adjustment mechanism includes a first adjustment slide and a first slider, and a first driving mechanism arranged along a first direction. The first slider is movably arranged on the first adjustment slide and can move along the first adjustment slide under the drive of the first driving mechanism, wherein the optical path system is fixedly matched with the first slider and can move synchronously with the first slider.

[0026] Furthermore, the second adjustment mechanism includes a second adjustment slide and a second slider, and a second driving mechanism arranged along the second direction. The second slider is movably arranged on the second adjustment slide and can move along the second adjustment slide under the drive of the second driving mechanism, wherein the optical path system is fixedly matched with the second slider and can move synchronously with the second slider.

[0027] Furthermore, the second adjustment slide is fixedly arranged on the first sliding block, and the optical path system is fixedly arranged on the second sliding block.

[0028] Furthermore, the first adjustment slide and the second adjustment slide are arranged vertically and crosswise.

[0029] Furthermore, the optical path system further comprises an imaging housing, the imaging optical path and the auxiliary alignment optical path are encapsulated in the imaging housing, and the imaging housing is in transmission cooperation with the adjustment mechanism.

[0030] Furthermore, the head-mounted shell includes an outer shell and a fixing strap, wherein the fixing strap is used to fix the outer shell to the human head, wherein the optical path system and the adjustment mechanism are encapsulated inside the outer shell, and the adjustment mechanism is fixedly matched with the outer shell.

[0031] Furthermore, the outer shell has an arc-shaped contour surface that matches the human eye, and the arc-shaped contour surface is also provided with an avoidance groove that matches the human nose bridge.

[0032] Furthermore, two avoidance grooves matching the bridge of the human nose are provided on the arc-shaped contour surface, and the two avoidance grooves are symmetrically distributed.

[0033] Furthermore, an adjustment button connected to the adjustment mechanism is also provided on the outer shell, and the adjustment button is connected to the adjustment mechanism.

[0034] The technical solution, its implementation process and principles will be further explained below with reference to the accompanying drawings. Unless otherwise specified, the various optical devices used in the embodiments of the present invention can be existing devices purchased on the market.

[0035] A head-mounted ophthalmic OCTA device provided in a typical embodiment of the present invention includes a head-mounted shell 1, an optical path system 4 and an adjustment mechanism 2. The head-mounted shell 1 includes an outer shell 101 and a fixing strap 105, wherein the optical path system 4 and the adjustment mechanism 2 are encapsulated inside the outer shell 101, and the adjustment mechanism 2 is fixedly arranged on the outer shell. The optical path system 4 is in transmission cooperation with the adjustment mechanism and can be moved to a specified position under the drive of the adjustment mechanism; the optical path system 4 includes an imaging shell 3 and an imaging optical path and an auxiliary alignment optical path encapsulated inside the imaging shell 3. The imaging optical path is at least used to collect image information of the detected eyeball, and the auxiliary alignment optical path is at least used to guide the gaze point position of the detected eyeball so that the detected eyeball is aligned in the pupil distance direction.

[0036] Specifically, the outer shell 101 has an arc-shaped contour surface that matches the human eye, and the upper and lower parts of the arc-shaped contour surface are also provided with avoidance grooves 104 that match the human nose bridge. The two avoidance grooves 104 are symmetrically distributed and are used to avoid interference from the nose bridge when worn. The fixing strap 105 is used to fix the device on the head of the subject. The head-mounted device can be worn forward or backward (flip the device 180°) to facilitate switching to detect two different left and right eyeballs.

[0037] For details, please refer to Figure 2 and Figure 3 The adjustment mechanism 2 is a cross-slide adjustment mechanism, which includes a first adjustment mechanism and a second adjustment mechanism. The first adjustment mechanism includes a first adjustment slide 201 arranged along a first direction, a first slider, and a first driving mechanism. The first slider is movably arranged on the first adjustment slide and can move along the first adjustment slide under the drive of the first driving mechanism. The second adjustment mechanism includes a second adjustment slide 202 arranged along a second direction, a second slider 203, and a second driving mechanism. The second slider 203 is movably arranged on the second adjustment slide 202 and can move along the second adjustment slide under the drive of the second driving mechanism. The optical path system 4 is fixedly arranged on the second slider 203, and the imaging shell 3 of the optical path system 4 is fixedly arranged on the second slider 203. The optical path system 4 can move along the second adjustment slide 202 together with the second slider 3. The optical path system 4 can move along the first adjustment slide 201 together with the second adjustment mechanism and the first slider. The first adjustment mechanism is at least used to drive the optical path system to move along the first direction to at least adjust the focal length between the eyepiece lens 407 and the detected eyeball; the second adjustment mechanism is at least used to drive the optical path system to move along the second direction to align the optical path system and the detected eyeball in the pupil distance direction.

[0038] Specifically, the first adjustment slide and the second adjustment slide are arranged vertically and crosswise, that is, the first direction and the second direction are arranged vertically. For example, the first adjustment slide 201 is a longitudinal adjustment slide, and the second adjustment slide 202 is a transverse adjustment slide. The first driving mechanism and the second driving mechanism are both motors, and the motors are connected to the transverse adjustment button 102 and the longitudinal adjustment button 103 provided on the outer shell 101. By adjusting the control adjustment buttons 102 and 103 to realize the forward and reverse rotation of the motor, the movement of the imaging system in different directions is adjusted, that is, the transverse adjustment and longitudinal adjustment of the control adjustment mechanism are controlled.

[0039] For details, please refer to Figure 4 , Figure 4 This is a structural schematic diagram of the optical path system provided in a typical embodiment of the present invention. The optical devices involved in the entire optical path system are all installed in the housing, including a laser collimator 401, a focus-adjustable lens 402, a two-dimensional scanning galvanometer 403, a first lens 404, a first dichroic mirror 405, a reflector 406, an eyepiece lens 407, a display screen 408, a second dichroic mirror 409, and a second lens 410.

[0040] Specifically, the imaging optical path system includes an imaging optical path and an auxiliary alignment optical path. The imaging optical path uses infrared light with a wavelength of 850 nm as incident light. The infrared light is collimated and corrected by the laser collimator 401 and then focused by the electronically adjustable focus lens 402. The focused light beam is reflected by the two-dimensional scanning galvanometer 403 and enters the first lens 404. After passing through the lens 404, the light beam is reflected by the first dichroic mirror 405 and enters the reflector 406. The light beam is then reflected by the reflector 406 to the eyepiece lens 407. The light beam is magnified by the lens 407 and enters the eyeball of the subject.

[0041] Specifically, the auxiliary alignment optical path includes a display screen 408, a second dichroic mirror 409, and a second lens 410. The display screen 408 used for auxiliary alignment in the auxiliary alignment optical path can display static or dynamic images, which is used to guide the gaze point position of the eye being tested before testing, thereby facilitating the alignment of the target being tested.

[0042] Specifically, the light beam in the imaging optical path enters the detected eyeball of the detected subject via a→a1→a2, and data collection is completed through this route. After the display screen 408 in the auxiliary alignment optical path displays the picture, the picture can be auxiliary aligned before detection via b→b2→a1→a2; at the same time, the light beam of the picture displayed on the display screen 408 also enters the other eyeball of the detected subject via b→b1. Before data collection, both eyes look at the display screen at the same time to guide the gaze point of the detected eye to align, thereby alleviating the fatigue caused by single-eye gaze.

[0043] When the head-mounted ophthalmic OCT device (probe) provided in an embodiment of the present invention is in use, after the subject wears the device through the fixing belt 105, the focal length between the lens and the eyeball can be adjusted by controlling the motor through the longitudinal adjustment button 103; for lateral position alignment, the motor can be controlled by the lateral adjustment button 102 to complete the eyeball alignment adjustment in the pupil distance direction; before data collection, the auxiliary alignment optical path can be used to coordinate with the eyeball alignment, and after the position is aligned, the staff can operate the device to complete data collection; and when it is necessary to collect data from the other eye, the head-mounted OCTA probe is flipped 180°, and the same operation can be used to complete data collection for the other eye.

[0044] In the head-mounted ophthalmic OCT device (probe) provided in an embodiment of the present invention, after the subject wears the device using the fixing strap 105, adjusts and aligns the probe with the eyeball and performs data acquisition, the optical path system and the subject can remain stationary or move synchronously. Therefore, it does not cause problems such as unclear data acquisition images and data artifacts caused by the subject's head shaking or hand shaking of conventional OCTA detection equipment or handheld OCTA equipment, thereby improving detection accuracy. After the subject wears the head-mounted ophthalmic OCT device (probe), some special patients whose hands can move normally can also adjust the button themselves to perform alignment, freeing the staff's hands and facilitating the staff's operation of other equipment.

[0045] An embodiment of the present invention provides a head-mounted ophthalmic OCT device (probe). An OCTA scanner is worn on the head of a subject for examination. The head-mounted ophthalmic OCT device (probe) can remain stationary or move synchronously with the subject, thereby resolving the focusing difficulties associated with conventional OCTA devices or handheld OCTA devices due to the subject's head shaking. This effectively mitigates motion artifacts and improves detection accuracy.

[0046] The display screen used in a head-mounted ophthalmic OCT device (probe) provided in an embodiment of the present invention can display different static or dynamic images. The images are flexible and changeable, which can meet the requirements of different types of subjects being tested. It can also enable the subject's two eyes to look at the display screen at the same time, guide the subject's eyeballs to align their gaze points, and alleviate the fatigue caused by monocular gaze.

[0047] The head-mounted ophthalmic OCT device (probe) provided in an embodiment of the present invention adopts a head-mounted structure, which is compact and easy to wear. After the subject wears it, special patients whose hands can move normally can also adjust the button themselves for alignment, freeing the staff's hands and facilitating the staff's operation of other equipment.

[0048] It should be understood that the above embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent variations or modifications made in accordance with the spirit and substance of the present invention are intended to be encompassed within the scope of protection of the present invention.

Claims

1. A head-mounted ophthalmic OCTA device, characterized in that include: A head-mounted housing, an optical path system, and an adjustment mechanism, wherein the adjustment mechanism is in transmission cooperation with the optical path system and is at least used to move the optical path system to a specified position; The optical path system includes an imaging optical path and an auxiliary alignment optical path, wherein the imaging optical path is at least used to collect image information of the detected eyeball, and the auxiliary alignment optical path is at least used to guide the gaze point position of the detected eyeball so that the detected eyeball is aligned in the direction of the pupil distance; The imaging optical path comprises a laser collimator (401), a focusable lens (402), a two-dimensional scanning galvanometer (403), a first lens (404), a first dichroic mirror (405), a reflector (406), and an eyepiece lens (407); a light beam from a light source sequentially passes through the laser collimator (401) and the focusable lens (402) and is incident on the two-dimensional scanning galvanometer (403); after being reflected by the two-dimensional scanning galvanometer (403), the light beam passes through the first lens (404) and is incident on the first dichroic mirror (405); after being reflected by the first dichroic mirror (405) and the reflector (406), the light beam is incident on the eyepiece lens (407); after being magnified by the eyepiece lens (407), the light beam enters the eyeball of the subject being tested; The auxiliary alignment light path includes a display screen (408), a second dichroic mirror (409), a second lens (410), a first dichroic mirror (405), a reflector (406), and an eyepiece lens (407). A portion of the image light beam from the display screen (408) is reflected by the second dichroic mirror (409), passes through the first dichroic mirror (405), and then enters the reflector (406). After being reflected by the reflector (406), it enters the eyepiece lens (407), and after being magnified by the eyepiece lens (407), enters the eyeball of the subject being tested. At the same time, another part of the image light beam from the display screen (408) passes through the second dichroic mirror (409), the second lens (410) in sequence and enters the other undetected eyeball of the person being detected.

2. The head-mounted ophthalmic OCTA device according to claim 1, characterized in that: The adjustment mechanism includes a first adjustment mechanism and a second adjustment mechanism, wherein the first adjustment mechanism is at least used to drive the optical path system to move along a first direction to at least adjust the focal length between the eyepiece lens (407) and the detected eyeball; and the second adjustment mechanism is at least used to drive the optical path system to move along a second direction to align the optical path system with the detected eyeball in the pupil distance direction.

3. The head-mounted ophthalmic OCTA device according to claim 2, characterized in that: The first adjustment mechanism includes a first adjustment slide, a first slider, and a first driving mechanism arranged along a first direction. The first slider is movably arranged on the first adjustment slide and can move along the first adjustment slide under the drive of the first driving mechanism. The optical path system is fixedly matched with the first slider and can move synchronously with the first slider.

4. The head-mounted ophthalmic OCTA device according to claim 3, characterized in that: The second adjustment mechanism includes a second adjustment slide and a second slider, and a second driving mechanism, which are arranged along the second direction. The second slider is movably arranged on the second adjustment slide and can move along the second adjustment slide under the drive of the second driving mechanism. The optical path system is fixedly matched with the second slider and can move synchronously with the second slider.

5. The head-mounted ophthalmic OCTA device according to claim 4, characterized in that: The second adjustment slide is fixedly arranged on the first sliding block, and the optical path system is fixedly arranged on the second sliding block.

6. The head-mounted ophthalmic OCTA device according to claim 5, characterized in that: The first adjusting slide and the second adjusting slide are arranged vertically and crosswise.

7. The head-mounted ophthalmic OCTA device according to claim 1, characterized in that: The optical path system further includes an imaging housing, in which the imaging optical path and the auxiliary alignment optical path are encapsulated, and the imaging housing is in transmission cooperation with the adjustment mechanism.

8. The head-mounted ophthalmic OCTA device according to claim 1, characterized in that: The head-mounted housing includes an outer shell and a fixing strap, wherein the fixing strap is used to fix the outer shell on the human head, wherein the optical path system and the adjustment mechanism are encapsulated inside the outer shell, and the adjustment mechanism is fixedly matched with the outer shell.

9. The head-mounted ophthalmic OCTA device according to claim 8, characterized in that: The outer shell has an arc-shaped contour surface that matches the human eye, and the arc-shaped contour surface is also provided with an avoidance groove that matches the human nose bridge.

10. The head-mounted ophthalmic OCTA device according to claim 9, characterized in that: The arc-shaped contour surface is provided with two avoidance grooves matching the nose bridge of the human body, and the two avoidance grooves are distributed in a mirror-symmetrical manner.

11. The head-mounted ophthalmic OCTA device according to claim 8, characterized in that: The outer shell is further provided with an adjustment button connected to the adjustment mechanism, and the adjustment button is connected to the adjustment mechanism.

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