Lens focusing structure for OCT device

Abstract

The present invention discloses a lens focusing structure for an OCT device, comprising: a fixed sleeve; a driven inner sleeve disposed within the fixed sleeve; a driving outer sleeve rotatably sleeved on the outer surface of the fixed sleeve; an adjusting mechanism for driving the movement of the driven inner sleeve; the adjusting mechanism includes: a guide pin; a driving hole provided at one end of the driven inner sleeve, with one end of the guide pin inserted into the driving hole; a first driving groove provided on the inner surface of the driving outer sleeve and extending along the central axis direction of the driving outer sleeve, with the other end of the guide pin extending into the first driving groove; a second driving groove penetrating through the wall of the fixed sleeve and extending along the central axis direction of the fixed sleeve, and the guide pin passing through the second driving groove; one of the first driving groove and the second driving groove is a straight groove, and the other of the first driving groove and the second driving groove is a spiral groove. The lens focusing structure for an OCT device of the present invention has a simple and compact structure, is convenient for assembly, and improves production efficiency.

Description

Technical Field

[0001] The present invention relates to a lens focusing structure for an OCT device. Background Art

[0002] Optical Coherence Tomography (OCT) is a new imaging diagnostic technology in ophthalmology after radiological diagnosis, ultrasonic diagnosis, and angiographic diagnosis. This technology was introduced into the medical field in 1991. In ophthalmology, it uses non-invasive, non-contact near-infrared light to perform cross-sectional scans of the fine structure of the retina, can clearly display the structure of different layers of the retina, and objectively and quantitatively measure and analyze the fine structure of the retina. It allows us to detect some eye degenerative diseases at an early stage. For example, macular lesions and optic nerve lesions, etc.

[0003] In existing OCT devices, the lens focusing structure has defects such as large size and inconvenient installation. Summary of the Invention

[0004] The present invention provides a lens focusing structure for an OCT device to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0005] A lens focusing structure for an OCT device includes:

[0006] A fixed seat, provided with an incident end and an exit end;

[0007] An exit lens, arranged at the exit end of the fixed seat;

[0008] An adjustable incident component, arranged at the incident end of the fixed seat;

[0009] The adjustable incident component includes:

[0010] A fixed sleeve, fixed to the incident end of the fixed seat;

[0011] A driven inner sleeve, arranged inside the fixed sleeve. An incident lens is provided at one end of the driven inner sleeve away from the fixed sleeve. Light enters from the incident lens and exits from the exit lens. The driven inner sleeve can move along the central axis direction of the fixed sleeve to approach or move away from the fixed seat, thereby changing the optical path between the incident lens and the exit lens;

[0012] A driving outer sleeve, rotatably sleeved on the outer surface of the fixed sleeve;

[0013] A driving mechanism, arranged at the incident end of the fixed seat and meshed with the driving outer sleeve to drive its rotation;

[0014] An adjusting mechanism is disposed between the driven inner sleeve and the driving outer sleeve and is respectively connected to the driving outer sleeve and the driven inner sleeve. When the driving mechanism drives the driving outer sleeve to rotate, the adjusting mechanism drives the driven inner sleeve to move under the drive of the driving outer sleeve;

[0015] The adjusting mechanism includes:

[0016] A guiding pin;

[0017] A driving hole is disposed at one end of the driven inner sleeve close to the fixed sleeve, and one end of the guiding pin is inserted into the driving hole;

[0018] A first driving groove is provided on the inner surface of the driving outer sleeve and extends along the direction of the central axis of the driving outer sleeve, and the other end of the guiding pin extends into the first driving groove;

[0019] A second driving groove is provided through the wall of the fixed sleeve and extends along the direction of the central axis of the fixed sleeve, and the guiding pin passes through the second driving groove;

[0020] One of the first driving groove and the second driving groove is a straight groove, and the other of the first driving groove and the second driving groove is a spiral groove;

[0021] When the driving outer sleeve rotates, the guiding pin moves along the straight groove in the first driving groove and the second driving groove under the cooperation of the first driving groove and the second driving groove, so as to drive the driven inner sleeve to approach or move away from the fixed seat.

[0022] Furthermore, an engaging portion is provided on the outer surface of one end of the driving outer sleeve close to the fixed seat;

[0023] The driving mechanism includes:

[0024] A motor fixing plate is connected to the incident end of the fixed seat;

[0025] A driving motor is fixed to the incident end of the fixed seat through the motor fixing plate, and a meshing member meshing with the engaging portion of the driving outer sleeve is connected to the motor shaft of the driving motor;

[0026] When the driving motor starts, it drives the driving outer sleeve to rotate through the meshing member.

[0027] Furthermore, the motor shaft of the driving motor is parallel to the rotation axis of the driving outer sleeve;

[0028] The meshing member is a meshing gear;

[0029] The engaging portion provided on the fixed seat is an engaging tooth;

[0030] The meshing gear cooperates with the engaging tooth.

[0031] Furthermore, the motor shaft of the driving motor is perpendicular to the rotation axis of the driving outer sleeve;

[0032] The engaging member is a screw;

[0033] The engaging portion provided on the fixed seat is a worm gear structure;

[0034] The screw engages with the worm gear structure.

[0035] Furthermore, the drive mechanism further includes:

[0036] A motor housing, fixed to the incident end of the fixed seat to cover the engaging member, and the motor housing is provided with a limiting groove that cooperates with the engaging portion on the outer surface of the drive outer sleeve.

[0037] Furthermore, the first drive groove is a spiral groove, and the second incident lens drive groove is a straight groove.

[0038] Furthermore, the adjustable incident component includes a plurality of adjusting mechanisms;

[0039] The plurality of adjusting mechanisms are evenly spaced along the circumferential direction of the driven inner sleeve.

[0040] Furthermore, a retaining ring is further provided at one end of the driven inner sleeve close to the fixed seat;

[0041] The driven inner sleeve is provided with an installation annular groove for accommodating the retaining ring;

[0042] The inner surface of the installation annular groove is provided with internal threads;

[0043] The outer surface of the retaining ring is provided with external threads that cooperate with the internal threads;

[0044] The inner diameter of the retaining ring is equal to the inner diameter of the driven inner sleeve.

[0045] Furthermore, the lens focusing structure for an OCT device includes a plurality of exit lenses;

[0046] The plurality of exit lenses are arranged in contact with each other at the exit end of the fixed seat.

[0047] Furthermore, the lens focusing structure for an OCT device further includes:

[0048] A reflecting mirror, disposed inside the fixed seat to reflect the light incident on the incident lens to the exit lens to change the angle of the light;

[0049] The fixed seat is provided with an installation groove;

[0050] The reflecting mirror is installed from the outside of the fixed seat into the installation groove to be fixed to the fixed seat;

[0051] The incident light incident on the incident lens is perpendicular to the exit light exiting the exit lens.

[0052] The advantage of the present invention lies in the provided lens focusing structure for an OCT device, which is simple and compact in structure, easy to assemble, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic diagram of a lens focusing structure for an OCT device according to the present invention;

[0054] Figure 2 is an exploded view of a lens focusing structure for an OCT device according to the present invention;

[0055] Figure 3 is a schematic diagram of the driving outer sleeve of the present invention;

[0056] A lens focusing structure 100 for an OCT device, a fixed seat 10, an incident end 11, an exit end 12, a mirror 13, a mounting groove 14, a mounting flange 15, an exit lens 20, an adjustable incident assembly 30, a fixed sleeve 31, a driven inner sleeve 32, an incident lens 321, a retaining ring 322, a mounting annular groove 323, a driving outer sleeve 33, an engaging portion 331, a driving mechanism 34, a motor fixing plate 341, a driving motor 342, an engaging member 343, a motor housing 344, a limiting groove 345, an adjusting mechanism 35, a guiding pin 351, a driving hole 352, a first driving groove 353, a second driving groove 354. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0058] As Figures 1-3 shown, a lens focusing structure 100 for an OCT device of the present application includes: a fixed seat 10, an exit lens 20, and an adjustable incident assembly 30. The fixed seat 10 is provided with an incident end 11 and an exit end 12. The exit lens 20 is disposed at the exit end 12 of the fixed seat 10. The adjustable incident assembly 30 is disposed at the incident end 11 of the fixed seat 10. Specifically, the incident end 11 of the fixed seat 10 is provided with a mounting flange 15, and the adjustable incident assembly 30 is disposed on the mounting flange 15.

[0059] Specifically, the adjustable incident component 30 includes: a fixed sleeve 31, a driven inner sleeve 32, a driving outer sleeve 33, a driving mechanism 34, and an adjusting mechanism 35. The fixed sleeve 31 is fixed to the incident end 11 of the fixed seat 10. The driven inner sleeve 32 is disposed within the fixed sleeve 31. An incident lens 321 is provided at one end of the driven inner sleeve 32 away from the fixed sleeve 31. Light enters from the incident lens 321 and exits from the exit lens 20. The driven inner sleeve 32 can move along the central axis direction of the fixed sleeve 31 to approach or move away from the fixed seat 10, thereby changing the optical path between the incident lens 321 and the exit lens 20, and thus adjusting the focal length of the entire lens group. The driving outer sleeve 33 is rotatably sleeved on the outer surface of the fixed sleeve 31. The driving mechanism 34 is disposed at the incident end 11 of the fixed seat 10 and meshes with the driving outer sleeve 33 to drive it to rotate. The adjusting mechanism 35 is disposed between the driven inner sleeve 32 and the driving outer sleeve 33, and is respectively connected to the driving outer sleeve 33 and the driven inner sleeve 32. When the driving mechanism 34 drives the driving outer sleeve 33 to rotate, the adjusting mechanism 35 drives the driven inner sleeve 32 to move under the drive of the driving outer sleeve 33.

[0060] In this application, the adjusting mechanism 35 includes: a guide pin 351, a driving hole 352, a first driving groove 353, and a second driving groove 354.

[0061] Specifically, the driving hole 352 is provided at one end of the driven inner sleeve 32 close to the fixed sleeve 31. One end of the guide pin 351 is inserted into the driving hole 352. The first driving groove 353 is provided on the inner surface of the driving outer sleeve 33 and extends along the central axis direction of the driving outer sleeve 33. The other end of the guide pin 351 extends into the first driving groove 353. The second driving groove 354 is provided through the wall of the fixed sleeve 31 and extends along the central axis direction of the fixed sleeve 31, and the guide pin 351 passes through the second driving groove 354.

[0062] Preferably, one of the first driving groove 353 and the second driving groove 354 is a straight groove, and the other of the first driving groove 353 and the second driving groove 354 is a spiral groove. In this way, when the driving outer sleeve 33 rotates, the guide pin 351 moves along the straight groove in the first driving groove 353 and the second driving groove 354 under the cooperation of the first driving groove 353 and the second driving groove 354, thereby driving the driven inner sleeve 32 to approach or move away from the fixed seat 10. In this application, the first driving groove 353 is a spiral groove, and the second driving groove 354 is a straight groove. When the driving outer sleeve 33 rotates, the guide pin 351 moves linearly in the second driving groove 354 of the fixed sleeve 31, and the guide pin 351 drives the driven inner sleeve 32 to approach or move away from the fixed seat 10.

[0063] As a preferred embodiment, the adjustable incident component 30 includes a plurality of the aforementioned adjusting mechanisms 35. These adjusting mechanisms 35 are evenly spaced along the circumferential direction of the driven inner sleeve 32. In this way, the driving of the driven inner sleeve 32 by the adjusting mechanisms 35 is more stable.

[0064] As a preferred embodiment, an engaging portion 331 is provided on the outer surface of one end of the driving outer sleeve 33 close to the fixed seat 10. And the driving mechanism 34 includes: a motor fixing plate 341 and a driving motor 342. The motor fixing plate 341 is connected to the incident end 11 of the fixed seat 10. The driving motor 342 is fixed to the incident end 11 of the fixed seat 10 through the motor fixing plate 341. A meshing member 343 meshing with the engaging portion 331 of the driving outer sleeve 33 is connected to the motor shaft of the driving motor 342. When the driving motor 342 is started, the driving outer sleeve 33 is driven to rotate through the meshing member 343.

[0065] In the present application, the motor shaft of the driving motor 342 is parallel to the rotation axis of the driving outer sleeve 33. The meshing member 343 is a meshing gear. The engaging portion 331 provided on the fixed seat 10 is an engaging tooth. The meshing gear cooperates with the engaging tooth.

[0066] In the present application, the driving mechanism 34 further includes: a motor housing 344. The motor housing 344 is fixed to the incident end 11 of the fixed seat 10 to cover the meshing member 343 and prevent the meshing member 343 from being exposed. Preferably, the motor housing 344 is provided with a limiting groove 345 cooperating with the engaging portion 331 on the outer surface of the driving outer sleeve 33, and at least a part of the engaging portion 331 is received in the limiting groove 345. The cooperation between the limiting groove 345 and the engaging portion 331 can limit the axial movement of the driving outer sleeve 33.

[0067] As another alternative embodiment, the motor shaft of the driving motor may also be perpendicular to the rotation axis of the driving outer sleeve. The meshing member is a screw. The engaging portion provided on the fixed seat is a worm gear structure. The screw meshes with the worm gear structure. In this way, when the driving motor rotates, the driving outer sleeve can also be driven through the cooperation of the screw. Specifically, since the arrangement methods of the driving motors in these two schemes are different, therefore, the appropriate driving mechanism can be selected according to the installation space around the lens focusing structure for the OCT device.

[0068] As a preferred embodiment, a retaining ring 322 is further provided at one end of the driven inner sleeve 32 close to the fixed seat 10. The driven inner sleeve 32 is provided with an installation annular groove 323 for receiving the retaining ring 322. The inner surface of the installation annular groove 323 is provided with internal threads. The outer surface of the retaining ring 322 is provided with external threads cooperating with the internal threads. The inner diameter of the retaining ring 322 is equal to the inner diameter of the driven inner sleeve 32.

[0069] As a preferred embodiment, the lens focusing structure 100 for an OCT device includes a plurality of exit lenses 20. The plurality of exit lenses 20 are disposed in contact with each other at the exit end 12 of the fixed seat 10.

[0070] As a preferred embodiment, the lens focusing structure 100 for an OCT device further includes: a mirror 13.

[0071] Specifically, the mirror 13 is disposed within the fixed seat 10 to reflect the light incident on the incident lens 321 to the exit lens 20 to change the angle of the light, so that the incident light incident on the incident lens 321 is perpendicular to the exit light exiting the exit lens 20.

[0072] Further, the fixed seat 10 is provided with a mounting groove 14. In this way, the mirror 13 can be mounted from the outside of the fixed seat 10 into the mounting groove 14 to be fixed to the fixed seat 10. This is conducive to the installation of the mirror 13.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by using equivalent substitutions or equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A lens focusing structure for an OCT device, characterized in that, Comprising: A fixed base provided with an incident end and an exit end; An exit lens disposed at the exit end of the fixed base; An adjustable incident component disposed at the incident end of the fixed base; The adjustable incident component comprises: A fixed sleeve fixed to the incident end of the fixed base; A driven inner sleeve disposed within the fixed sleeve. An incident lens is provided at one end of the driven inner sleeve away from the fixed sleeve. Light enters through the incident lens and exits through the exit lens. The driven inner sleeve can move along the central axis direction of the fixed sleeve to approach or move away from the fixed base so as to change the optical path between the incident lens and the exit lens; A driving outer sleeve rotatably sleeved on the outer surface of the fixed sleeve; A driving mechanism disposed at the incident end of the fixed base and meshing with the driving outer sleeve to drive its rotation; An adjusting mechanism disposed between the driven inner sleeve and the driving outer sleeve and respectively connected to the driving outer sleeve and the driven inner sleeve. When the driving mechanism drives the driving outer sleeve to rotate, the adjusting mechanism drives the driven inner sleeve to move under the drive of the driving outer sleeve; The adjusting mechanism comprises: A guiding pin; A driving hole provided at one end of the driven inner sleeve close to the fixed sleeve, and one end of the guiding pin is inserted into the driving hole; A first driving groove provided on the inner surface of the driving outer sleeve and extending along the central axis direction of the driving outer sleeve, and the other end of the guiding pin extends into the first driving groove; A second driving groove penetrating through the wall of the fixed sleeve and extending along the central axis direction of the fixed sleeve, and the guiding pin passes through the second driving groove; One of the first driving groove and the second driving groove is a straight groove, and the other of the first driving groove and the second driving groove is a spiral groove; When the driving outer sleeve rotates, the guiding pin moves along the straight groove in the first driving groove and the second driving groove under the cooperation of the first driving groove and the second driving groove, thereby driving the driven inner sleeve to approach or move away from the fixed base.

2. The lens focusing structure for an OCT device according to claim 1, wherein An engaging portion is provided on the outer surface of one end of the driving outer sleeve close to the fixed base; The driving mechanism comprises: A motor fixing plate connected to the incident end of the fixed base; A driving motor fixed to the incident end of the fixed base through the motor fixing plate. A meshing member meshing with the engaging portion of the driving outer sleeve is connected to the motor shaft of the driving motor; When starting, the driving motor drives the driving outer sleeve to rotate through the meshing member.

3. The lens focusing structure for an OCT device according to claim 2, wherein The motor shaft of the driving motor is parallel to the rotation axis of the driving outer sleeve; The meshing member is a meshing gear; The engaging portion provided on the fixed base is an engaging tooth; The meshing gear cooperates with the engaging tooth.

4. The lens focusing structure for an OCT device according to claim 2, wherein The motor shaft of the driving motor is perpendicular to the rotation axis of the driving outer sleeve; The engaging member is a screw; The engaging portion provided on the fixed seat is a worm gear structure; The screw is engaged with the worm gear structure.

5. The lens focusing structure for an OCT device according to any one of claims 2-4, wherein The driving mechanism further includes: A motor housing fixed to the incident end of the fixed seat to cover the engaging member, and the motor housing is provided with a limiting groove that cooperates with the engaging portion on the outer surface of the driving outer sleeve.

6. The lens focusing structure for an OCT device according to claim 1, wherein The first driving groove is a spiral groove, and the second driving groove is a straight groove.

7. The lens focusing structure for an OCT device according to claim 1, wherein The adjustable incident component includes a plurality of the adjusting mechanisms; The plurality of adjusting mechanisms are evenly spaced along the circumferential direction of the driven inner sleeve.

8. The lens focusing structure for an OCT device according to claim 1, wherein A retaining ring is further provided at one end of the driven inner sleeve close to the fixed seat; The driven inner sleeve is provided with a mounting annular groove for accommodating the retaining ring; The inner surface of the mounting annular groove is provided with internal threads; The outer surface of the retaining ring is provided with external threads that cooperate with the internal threads; [[ID= ​ ​ ​ ​ ​ ​ ​ ​ ​

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