Laser fundus treatment device

Abstract

The utility model discloses a laser fundus treatment device which is characterized in that the laser fundus treatment device comprises a fundus lighting device, a cornea contact lens, an optical assembly, a dichroic mirror, a phase forming camera and a laser light source, and laser emitted by the laser light source penetrates through the dichroic mirror and then enters fundus through the optical assembly and the cornea contact lens. Light emitted by the fundus lighting device and reflected by the fundus passes through the cornea contact lens and the optical assembly and then is reflected by the dichroic mirror to enter the phase forming camera. The utility model has the beneficial effects that: 1, large-view-field imaging is realized by using the corneal contact lens, so that a doctor can conveniently and quickly diagnose the fundus; and 2, by designing each lens group and adopting the dichroic mirror, the imaging is clear, and the energy convergence effect of the laser on the retina is good.

Description

Technical Field

[0001] The utility model relates to a laser treatment device, in particular to a laser fundus treatment device. Background Art

[0002] The fundus is composed of the retina, fundus blood vessels, optic nerve head, optic nerve fibers, macula on the retina, and choroid behind the retina. Lesions in these parts are collectively referred to as fundus diseases. The harm of fundus diseases to people is mainly reflected in affecting visual ability, and in severe cases, it can cause blindness. At present, the mainstream method for treating fundus diseases is to use lasers to irradiate the lesions through the refractive medium, causing the proteins in the lesions to denature and coagulate, thereby achieving the purpose of treating various fundus diseases. Compared with traditional physical therapy and drug therapy for treating fundus diseases, laser treatment does not damage normal eye tissues.

[0003] When using laser to treat fundus diseases, existing treatment methods usually use visible light imaging technology to image the fundus to guide treatment. Then, according to the size of the lesion and clinical response, the laser output power, exposure time, spot size, treatment time and other parameters are determined. In the existing technology, the fundus range obtained after the light enters the camera is small, which is not conducive to diagnosis and treatment. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a laser fundus treatment device, which changes the imaging and illumination light paths by arranging a corneal contact lens on the outside of the eyeball, expands the field of view, and realizes wide-area retinal imaging with a large field of view, so as to facilitate subsequent diagnosis and treatment.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a laser fundus treatment device, which mainly includes: a fundus lighting device, a corneal contact lens, an optical component, a dichroic mirror, a camera and a laser light source,

[0006] The laser light emitted by the laser light source passes through the dichroic mirror and then enters the fundus through the optical component and the corneal contact lens.

[0007] The light emitted by the fundus illumination device and reflected by the fundus passes through the corneal contact lens and the optical component, and then is reflected by the dichroic mirror and enters the camera;

[0008] or

[0009] The laser light emitted by the laser light source is reflected by the dichroic mirror and then enters the fundus through the optical component and the corneal contact lens.

[0010] The light emitted by the fundus illumination device and reflected by the fundus passes through the corneal contact lens and the optical component, then transmits through the dichroic mirror and enters the camera.

[0011] Furthermore, the optical assembly includes an eyepiece lens group and a collimating lens group which are sequentially arranged between the corneal contact lens and the dichroic mirror.

[0012] Furthermore, an imaging lens group is provided between the dichroic mirror and the imaging camera.

[0013] Furthermore, a laser lens group is provided between the dichroic mirror and the laser light source.

[0014] Furthermore, the fundus lighting device includes a circular ring and lighting light sources uniformly arranged on the circular ring.

[0015] Furthermore, the lighting source is a visible light LED lamp.

[0016] Furthermore, a light-guiding optical fiber is provided between the edge of the corneal contact lens and the illumination light source.

[0017] Furthermore, the laser light source is equipped with a pedal switch for controlling the emission and shutting off of the laser.

[0018] The beneficial effects of the utility model are: 1. By using corneal contact lenses, large-field imaging is achieved, which is convenient for doctors to quickly diagnose the fundus; 2. By designing each lens group and adopting a dichroic mirror, the imaging is clear and the energy convergence effect of the laser on the retina is good.

[0019] The utility model is described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the laser fundus treatment device of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the fundus illumination device in the laser fundus treatment device of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the second embodiment of the laser fundus treatment device of the present utility model.

[0023] In the attached drawings, 1. fundus illumination device, 1-1. circular ring, 1-2. illumination light source, 2. corneal contact lens, 3. dichroic mirror, 4. photographic camera, 5. laser light source, 6. eyepiece objective lens group, 7. collimating lens group, 8. imaging lens group, 9. laser lens group, 10. light-guiding optical fiber. DETAILED DESCRIPTION

[0024] Embodiment 1: See attached Figure 1 and 2The laser fundus treatment device in this embodiment includes a fundus illumination device 1, a corneal contact lens 2, an optical component, a dichroic mirror 3, a camera 4, and a laser light source 5. The laser light emitted by the laser light source 5 passes through the dichroic mirror 3 and enters the fundus through the optical component and the corneal contact lens 2. The light emitted by the fundus illumination device 1 and reflected by the fundus passes through the corneal contact lens 2 and the optical component and is reflected by the dichroic mirror 3 and enters the camera 4.

[0025] The corneal contact lens 2 is used close to the cornea, and can change the imaging and illumination light paths, expand the field of view, and achieve wide-area retinal imaging with a large field of view. The dichroic mirror 3 is used to reflect the retinal imaging beam into the imaging CMOS camera; and transmit the laser beam of the laser light source 5 for laser emission treatment.

[0026] The above optical assembly includes an eyepiece lens group 6 and a collimator lens group 7 which are sequentially arranged between the corneal contact lens 2 and the dichroic mirror 3. The eyepiece lens group 6 is used to image the retina of the human eye onto the object plane of the rear optical path. By moving the eyepiece lens, the angle of the human eye with different diopters is compensated so that the retina can obtain a clear image. The collimator lens group 7 is used to collimate the imaging beam of the retina so that the rear end can realize the imaging and laser emission splitting in the parallel beam, avoiding the astigmatism caused by installing an inclined plate (dichroic mirror) in the convergent or divergent optical path.

[0027] An imaging lens group 8 is provided between the dichroic mirror 3 and the camera 4. The imaging lens group 8 is used to focus the parallel light beams so that the fundus of the human eye is imaged on the camera target surface; and the imaging lens group is moved along the optical axis to focus, compensate for the diopter error of the human eye, and adjust the front and rear position of the front group to make the retinal image clear.

[0028] A laser lens group 9 is provided between the dichroic mirror 3 and the laser light source 5. The laser lens group 9 is used to collimate the laser light with a divergent full angle of 2×NA=0.44, i.e., NA=0.22, emitted from the optical fiber into parallel light, dock with the front-end system, and finally converge the laser light onto the retina of the human eye for treatment; and by moving the laser lens group along the optical axis to focus, the energy convergence on the retina is optimized.

[0029] The fundus illumination device 1 comprises a circular ring 1-1 and an illumination light source 1-2 uniformly arranged on the circular ring 1-1. The illumination light source 1-2 is a visible light LED lamp. A light guide fiber 10 is arranged between the edge of the corneal contact lens 2 and the illumination light source 1-2. The visible light emitted by the visible light LED of the illumination light source 1 illuminates the outer edge of the corneal contact lens 2 through the light guide fiber 10, avoiding the strong reflection of the central part of the human cornea, and the light illuminates the fundus through the pupil of the human eye.

[0030] In addition, a aiming mechanism can be set on the laser light source host to ensure that the therapeutic laser can be accurately irradiated on the lesion to avoid deviation of the therapeutic laser.

[0031] In a specific implementation, the above-mentioned fundus illumination device 1, corneal contact lens 2, optical assembly, dichroic mirror 3, camera 4 and other components are installed in a handheld housing, while the laser light source 5 is located outside the housing. The image collected by the camera 4 can be transmitted to the host through wired or wireless communication, and the host supporting the laser light source 5 is connected to the housing through an optical fiber, and a pedal switch for controlling the laser to be emitted and turned off is provided on the host.

[0032] The operation process of the utility model is as follows: 1. Turn on the fundus illumination device 1, and the light emitted by the device is reflected by the upper fundus, passes through the corneal contact lens 2, the eyepiece lens group 6 and the collimating lens group 7, and then is reflected by the dichroic mirror 3, and then enters the camera 4 through the imaging lens group 8. Due to the characteristics of the corneal contact lens 2, a larger field of view can be obtained after imaging, exposing images of various positions of the fundus for doctors to diagnose.

[0033] 2. According to the diagnosis of the fundus, the doctor controls the opening and closing of the laser light source 5 through the pedal switch to treat the fundus.

[0034] Embodiment 2: See attached Figure 3 Different from the first embodiment, in the present embodiment, the laser light emitted by the laser light source 5 is reflected by the dichroic mirror 3 and then enters the fundus through the optical component and the corneal contact lens 2; the light emitted by the fundus illumination device 1 and reflected by the fundus passes through the corneal contact lens 2 and the optical component and then transmits the dichroic mirror 3 and then enters the camera 4.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A laser fundus treatment device, characterized in that: The invention comprises a fundus illumination device (1), a corneal contact lens (2), an optical component, a color separation mirror (3), a photographic camera (4) and a laser light source (5). The laser light emitted by the laser light source (5) is transmitted through the dichroic mirror (3) and then enters the fundus through the optical component and the corneal contact lens (2). The light emitted by the fundus illumination device (1) and reflected by the fundus passes through the corneal contact lens (2) and the optical component, is reflected by the dichroic mirror (3) and enters the photographic camera (4); or The laser light emitted by the laser light source (5) is reflected by the dichroic mirror (3) and then enters the fundus through the optical component and the corneal contact lens (2). The light emitted by the fundus illumination device (1) and reflected by the fundus passes through the corneal contact lens (2) and the optical component, transmits through the dichroic mirror (3), and then enters the photographic camera (4).

2. The laser fundus treatment device according to claim 1, characterized in that: The optical component comprises an eyepiece lens group (6) and a collimating lens group (7) which are arranged in sequence between the corneal contact lens (2) and the dichroic mirror (3).

3. The laser fundus treatment device according to claim 1, characterized in that: An imaging lens group (8) is provided between the dichroic mirror (3) and the imaging camera (4).

4. The laser fundus treatment device according to claim 1, characterized in that: A laser lens group (9) is provided between the dichroic mirror (3) and the laser light source (5).

5. The laser fundus treatment device according to claim 1, characterized in that: The fundus illumination device (1) comprises a circular ring (1-1) and an illumination light source (1-2) evenly arranged on the circular ring (1-1).

6. The laser fundus treatment device according to claim 5, characterized in that: The lighting light source (1-2) is a visible light LED lamp.

7. The laser fundus treatment device according to claim 5, characterized in that: A light-guiding optical fiber (10) is provided between the edge of the corneal contact lens (2) and the illumination light source (1-2).

8. The laser fundus treatment device according to any one of claims 1 to 7, characterized in that: The laser light source (5) is equipped with a pedal switch for controlling the emission and shutoff of the laser.

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