CN111202491A

CN111202491A - Eyeball laser scanner

Info

Publication number: CN111202491A
Application number: CN202010157094.9A
Authority: CN
Inventors: 鈴木大輔; 沈健; 吴海洲; 潘进
Original assignee: Yaoshi Suzhou Medical Technology Co Ltd
Current assignee: Yaoshi Suzhou Medical Technology Co Ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-05-29

Abstract

The invention relates to the technical field of ophthalmic 3D imaging, and discloses an eyeball laser scanner which comprises a base and a driving unit arranged on the base, wherein an SLO (laser ablation) measuring unit is arranged on the driving unit, the driving unit is used for driving the SLO measuring unit to adjust the position, the SLO measuring unit comprises a laser generator arranged at the rear and a focusing lens arranged at the front, laser emitted by the laser generator is transmitted to the focusing lens arranged at the front of the SLO measuring unit through an optical component on a light path and is emitted to an eyeball, one side or two sides of the focusing lens at the front of the SLO measuring unit are provided with cameras, the cameras receive eyeball images, and an included angle is formed between the cameras and the horizontal direction of the eyeball. The invention realizes the regulation of the observation of the SLO ophthalmoscope on the eyeball and the realization of the 3D imaging of the eyeball through the camera.

Description

Eyeball laser scanner

Technical Field

The invention relates to the technical field of ophthalmic 3D imaging, in particular to an eyeball laser scanner.

Background

In the field of ophthalmic examination, the pathological structures of the retina are generally observed by irradiating the retina through the pupil with strong light or strong light, which is generally 10% to 100% of the retina tolerance, and this is probably acceptable in normal eyes, but may cause permanent damage to pathological eyeballs.

In view of this problem, since the 70 s of the 20 th century, there have been increasing laser scanning methods for completing the scanning of the eye by means of laser, and laser scanning ophthalmoscopes have been developed by the boston Scheoens research institute, which scan the fundus of the eye by means of a focused, dark laser beam (1/1000 of indirect ophthalmoscope with insufficient brightness), one spot at a time, receive and amplify the reflected light by a photodetector, obtain a pattern of fundus spots one by one, and digitally synthesize the pattern by means of an electronic computer, so that the electron beam forming the monitor image is synchronized with the laser beam scanning the retina, thereby obtaining a clear retinal structure image. In addition, the retina fluorescence imaging can be realized by equipment such as a laser scanning confocal microscope.

When extension surfaces of three surfaces, namely a shot object plane, an image plane and a lens plane, are intersected in a straight line by applying the Samm's law, a comprehensive and clear image can be obtained. Various anterior eye diseases can be observed by Scheimpflug camera.

Slo (scanning Laser ophthalmoscope) can observe various fundus diseases. However, no machine can observe both functions simultaneously on one machine.

Disclosure of Invention

An object of the present invention is to solve the above problems and to provide an eyeball laser scanner that realizes the adjustment of the observation of an eyeball by an SLO ophthalmoscope and the 3D imaging of the eyeball by a camera.

The technical scheme adopted by the invention is as follows:

the utility model provides an eyeball laser scanner, characterized by, includes the drive unit that sets up on base and the base, sets up the SLO measuring cell on the drive unit, the drive unit is used for driving SLO measuring cell adjusting position, the SLO measuring cell is including setting up laser generator at the rear, setting up the focusing lens in the place ahead, the laser that laser generator sent sends the focusing lens in the place ahead of SLO measuring cell through optical component on the light path and jets out to the eyeball, one side or both sides of the place ahead focusing lens of SLO measuring cell set up the camera, the camera receives eyeball image, the camera is an contained angle with the horizontal direction of eyeball.

Further, the optical component comprises a plane mirror, a concave lens and a convex lens, the plane mirror is arranged on the swinging piece to adjust the laser angle, and one or two of the concave lens and the convex lens are arranged on the sliding component to adjust the focal length of the laser.

Further, the sliding part comprises a lens sliding rail and a focusing motor, the concave lens or the convex lens is arranged on the lens sliding rail, and the focusing motor drives the concave lens or the convex lens to move along a light path on the sliding rail to adjust the focal length of the laser.

Further, the camera is arranged on the camera frame, and an adjusting lens is arranged between the camera and the eyeball.

Further, the camera is arranged on one side or two sides of the camera frame, the camera frame is arranged on the camera frame slide rail, the camera is driven to move through the camera driving motor, and the angle between the camera and the eyeball is adjusted.

Further, the camera sets up in one side of camera frame, the camera frame sets up in the pivot, the pivot passes through camera rotating electrical machines drive camera frame and rotates, the pivot coincides with the visual axis of eyeball.

Furthermore, the horizontal included angle between the optical axis of the camera and the visual axis of the eyeball is 30-45 degrees.

Further, the laser emitted by the laser generator comprises infrared laser, red laser, green laser and blue laser.

Further, the driving unit comprises an X-axis driving unit arranged on the base, a Y-axis driving unit is arranged on the X-axis driving unit, a Z-axis driving unit is arranged on the Y-axis driving unit, the SLO measuring unit is arranged on the Z-axis driving unit, and the driving unit drives the SLO measuring unit to adjust the position of the laser shot into the eyeball.

Further, a monitoring panel is arranged behind the SLO measuring unit and controls the adjustment and operation of components in the SLO measuring unit.

The invention has the beneficial effects that:

(1) the functions of the SLO and Scheimpflug cameras are simultaneously realized on one machine in a compact and portable form;

(2) the structure is compact, and the integral displacement and internal optical adjustment of the SLO measuring unit are realized;

(3) and each optical component is adjusted by a motor, so that the precision is high.

Drawings

FIG. 1 is an external structural view of the present invention;

FIG. 2 is a top view of the internal structure of the SLO measurement unit.

The reference numbers in the drawings are respectively:

1. a scanner; 2, adjusting a seat;

3. a base; 4.3 shaft drive unit; (ii) a

SLO measurement unit; a laser generator;

7. a monitoring panel; an X-axis drive unit;

an X-axis motor; a Y-axis drive unit;

a Y-axis motor; 12. a Y-axis lead screw;

a Y-axis nut; a Z-axis drive unit;

a Z-axis motor; a Z-axis lead screw;

a Z-axis nut; a focusing lens;

19. a camera; a plane mirror;

21. a concave lens; a convex lens;

23. a lens slide rail; a focus motor;

25. a camera frame; camera frame slide rail;

27. a camera drive motor; adjusting the lens.

Detailed Description

The following describes in detail an embodiment of the laser scanner for eyeball according to the present invention with reference to the accompanying drawings.

Referring to fig. 1, the eyeball laser scanner 1 includes a base 3 and a 3-axis driving unit 4 provided on the base 3, and an SLO measuring unit 5 is provided on the 3-axis driving unit 4, the driving unit being used to drive the SLO measuring unit 5 to adjust the position. The 3-axis driving unit 4 includes an X-axis driving unit 8, a Y-axis driving unit 10, and a Z-axis driving unit 14, the X-axis driving unit 8 is disposed on the base 3 by an X-axis motor 9, and the X-axis motor 9 drives the X-axis driving unit 8 to move back and forth with respect to the base 3.

The X-axis driving unit 8 is provided with a Y-axis driving unit 10, and the Y-axis driving unit 10 realizes vertical displacement through a lifting assembly consisting of a Y-axis motor 11, a Y-axis lead screw 12 and a Y-axis screw cap 13. The Y-axis driving unit 10 is provided with a Z-axis driving unit 14, and the Z-axis driving unit 14 moves left and right through a displacement assembly consisting of a Z-axis motor 15, a Z-axis lead screw 16 and a Z-axis nut 17. The SLO measuring unit 5 is provided on the Z-axis driving unit 14, and the position adjustment between the SLO measuring unit 5 and the eyeball of the measurer is realized by the combined action of the X-axis driving unit 8, the Y-axis driving unit 10, and the Z-axis driving unit 14.

The adjusting seat 2 is arranged in front of the base 3, the head of a measurer is fixed, and the height of the adjusting seat 2 can be adjusted, so that the eyeball position of the measurer is located at a proper position.

Referring to fig. 2, the SLO measuring unit 5 includes a laser generator 6 disposed at the rear, and a focusing lens 18 disposed at the front, the focusing lens 18 making the angle of the laser beam incident on the eyeball approximately 60 °. The laser emitted from the laser generator 6 is transmitted to the focusing lens 18 in front of the SLO measuring unit 5 via the optical components on the optical path and is emitted to the eyeball. The laser generated by the laser generator 6 includes infrared laser, red laser, green laser, and blue laser. One side or two sides of a focusing lens 18 in front of the SLO measuring unit 5 are provided with cameras 19, the cameras 19 receive eyeball images, and the cameras 19 form an included angle with the horizontal direction of the eyeballs. The optical component comprises a plane mirror 20, a concave lens 21 and a convex lens 22, the plane mirror 20 is arranged on the swinging piece to adjust the laser angle, and one or two of the concave lens 21 and the convex lens 22 are arranged on the sliding component to adjust the focal length of the laser.

Specifically, after the convex lens 22 is positioned on the optical path, only the concave lens 21 may be moved for focusing, the sliding component includes a lens slide rail 23 and a focusing motor 24, the concave lens 21 is disposed on the lens slide rail 23, and the focusing motor 24 drives the concave lens 21 to move along the optical path on the slide rail to adjust the focal length of the laser. The focus of the laser light is changed due to the change in the distance between the convex lens 22 and the concave lens 21.

The plane mirror 20 on the light path is used for changing the laser and the path direction, the plane mirror 20 is arranged on the swinging piece, and the change of the laser light path is adjusted along with the slight rotation of the swinging piece so as to adapt to the position of the eyeball.

The position and angle adjustment of the camera 19 are realized through the movement of the camera frame 25, when the camera 19 is single, the camera 19 is arranged on one side of the camera frame 25, when the number of the camera 19 is two, the camera 19 is symmetrically arranged on two sides of the camera frame 25, the camera frame 25 is arranged on the camera frame slide rail 26, the camera 19 is driven to move through the camera driving motor 27, the distance and the angle between the camera 19 and eyeballs are adjusted, the horizontal included angle between the camera 19 and the eyeballs is 30-45 degrees, and the best shooting effect is achieved.

For a single camera 19, the camera 19 is disposed on one side of the camera frame 25, and the camera frame 25 is disposed on a rotary shaft that rotates the camera frame 25 by a rotary motor of the camera 19, the rotary shaft being coincident with a visual axis of an eyeball. The camera 19 is rotated to shoot, a plurality of shooting surfaces of eyeballs are obtained, and 3D data of the eyes can be shot and processed. An adjusting lens 28 is arranged between the camera 19 and the eyeball for adjusting the shooting focus of the camera 19.

Behind the SLO measuring unit 5, a monitor 7 is provided, the monitor 7 controlling component adjustment and operation within the SLO measuring unit 5. And the control module is used for controlling various motors, the laser generator 6 and other elements in the system.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An eyeball laser scanner characterized by: the SLO measuring device comprises a base and a driving unit arranged on the base, wherein an SLO measuring unit is arranged on the driving unit and used for driving the SLO measuring unit to adjust the position, the SLO measuring unit comprises a laser generator arranged at the rear and a focusing lens arranged in front, laser emitted by the laser generator is transmitted to the focusing lens in front of the SLO measuring unit through an optical component on a light path and is emitted to an eyeball, one side or two sides of the focusing lens in front of the SLO measuring unit are provided with cameras, the cameras receive eyeball images, and an included angle is formed between the cameras and the horizontal direction of the eyeball.

2. The eye laser scanner according to claim 1, wherein: the optical component comprises a plane mirror, a concave lens and a convex lens, the plane mirror is arranged on the swinging piece to adjust the laser angle, and one or two of the concave lens and the convex lens are arranged on the sliding component to adjust the focal length of the laser.

3. The eye laser scanner according to claim 2, wherein: the sliding part comprises a lens sliding rail and a focusing motor, the concave lens or the convex lens is arranged on the lens sliding rail, and the focusing motor drives the concave lens or the convex lens to move along a light path on the sliding rail to adjust the focal length of the laser.

4. The eye laser scanner according to claim 1, wherein: the camera is arranged on the camera frame, and an adjusting lens is arranged between the camera and the eyeball.

5. The eye laser scanner according to claim 4, wherein: the camera is arranged on one side or two sides of the camera frame, the camera frame is arranged on the camera frame slide rail, the camera is driven to move through the camera driving motor, and the angle between the camera and the eyeball is adjusted.

6. The eye laser scanner according to claim 4, wherein: the camera is arranged on one side of the camera frame, the camera frame is arranged on a rotating shaft, the rotating shaft drives the camera frame to rotate through a camera rotating motor, and the rotating shaft is overlapped with a visual axis of an eyeball.

7. The eye laser scanner according to claim 4, wherein: the horizontal included angle between the optical axis of the camera and the visual axis of the eyeball is 30-45 degrees.

8. The eye laser scanner according to any one of claims 1 to 7, characterized in that: the laser emitted by the laser generator comprises infrared laser, red laser, green laser and blue laser.

9. The eye laser scanner according to any one of claims 1 to 7, characterized in that: the driving unit comprises an X-axis driving unit arranged on the base, a Y-axis driving unit is arranged on the X-axis driving unit, a Z-axis driving unit is arranged on the Y-axis driving unit, the SLO measuring unit is arranged on the Z-axis driving unit, and the driving unit drives the SLO measuring unit to adjust the position of laser incident into an eyeball.

10. The eye laser scanner according to any one of claims 1 to 7, characterized in that: and a monitoring panel is arranged behind the SLO measuring unit and controls the adjustment and operation of components in the SLO measuring unit.