Fundus camera illumination structure
By adopting an illumination structure with an annular base, an annular light source plate and multiple light emitting diodes in the fundus camera, the problems of uneven light intensity and insufficient lighting in the existing fundus camera lighting system are solved, and more uniform and powerful lighting is achieved, ensuring the clarity and accuracy of the image.
Patent Information
- Application Number
- CN202421606839.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-08
AI Technical Summary
The lighting systems of existing fundus cameras have problems with uneven light intensity and insufficient lighting, which leads to excessive brightness or darkness in certain areas of the image, affecting the accurate judgment of fundus color and characteristics.
A fundus camera lighting structure is adopted, including an annular base, an annular light source plate, a light emitting sleeve, a homogenous body and a light hood. By providing a plurality of first and second light emitting diodes, combined with a reflective ring and a homogenous body, more uniform and powerful light illumination is achieved.
Improves light intensity and uniformity, avoids color deviation, ensures image clarity and accuracy, and extends the service life of the light source.
Smart Images
Figure CN222815752U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fundus camera equipment, in particular to a fundus camera lighting structure. Background Art
[0002] Fundus cameras use the principle of dark light compliance of the human eye and their own optical imaging performance to collect high-resolution images of the fundus. They can accurately obtain clear fundus microcirculation images in a short time without mydriatic agents. When the fundus camera is working, it first emits light through the lighting system to illuminate the fundus inside the eyeball, and then the light passes through various tissues of the eye, such as the vitreous body and retina. These tissues will reflect or scatter the light, and the sensor of the fundus camera will receive the reflected or scattered light and convert it into an electrical signal. After processing and analysis, it will be displayed on the monitor for doctors to diagnose and analyze. The lighting system and imaging system in the fundus camera directly affect the accuracy and stability of the fundus camera imaging. The lighting system of the existing fundus camera may have the following problems: 1. Uneven light intensity: It will cause some areas of the image to be too bright or too dark; 2. Color deviation: It affects the accurate judgment of the color and characteristics of the fundus; 3. Insufficient lighting: It makes it difficult to display some details clearly. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a fundus camera lighting structure in view of the above-mentioned technical deficiencies, which solves the problems of uneven light intensity and insufficient lighting in the existing fundus camera lighting structure.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] A fundus camera lighting structure comprises an annular base, an annular light source plate is arranged on the upper part of the base, a plurality of first light emitting diodes are circumferentially distributed on the plane of the annular light source plate, a light emitting sleeve is sleeved radially outside the annular light source plate, a plurality of second light emitting diodes are distributed radially inside the light emitting sleeve, the second light emitting diodes and the first light emitting diodes are arranged alternately, and an annular light shield is sleeved outside the annular light source plate and the light emitting sleeve.
[0006] To further optimize the technical solution, an annular light-distributing body is provided between the light shield and the light-emitting sleeve.
[0007] To further optimize the technical solution, a concave conical chamfer is provided inside the light homogenizer on one side away from the annular light source plate.
[0008] To further optimize the technical solution, a reflective ring is provided at the inner bottom of the luminous sleeve, and a plurality of reflectors are distributed in a ring shape in the reflective ring, and the number of the reflectors is equal to the number of the second light-emitting diodes.
[0009] To further optimize the technical solution, a first reflecting surface is provided on both circumferential sides of the reflector, a second reflecting surface is provided on the top of the reflector, the second reflecting surface and the second light-emitting diode are axially arranged opposite to each other, and the reflector and the first light-emitting diode are coplanar and staggered with each other.
[0010] Compared with the prior art, the utility model has the following advantages:
[0011] 1. More first light emitting diodes and second light emitting diodes can be arranged by cooperating with the light emitting sleeve to make the illumination intensity higher;
[0012] 2. The first light emitting diode and the second light emitting diode can be set to light emitting diodes with different color temperatures, which can simulate different lighting to avoid color deviation during observation;
[0013] 3. The reflective ring and the light homogenizer are arranged in coordination to make the illumination of the fundus camera illumination structure more uniform. The staggered arrangement of the first light emitting diode and the second light emitting diode is more conducive to the dispersed heat dissipation of the light source and to increase the service life of the light source. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 An exploded schematic diagram of a fundus camera illumination structure;
[0015] Figure 2 A half-section view of a fundus camera illumination structure;
[0016] Figure 3 It is a schematic diagram of the structure of a fundus camera illumination structure after removing the homogenizer;
[0017] Figure 4 for Figure 3 A local enlarged schematic diagram of the middle A;
[0018] Figure 5 The present invention is a schematic diagram of the position of a fundus camera illumination structure when in use in a fundus camera.
[0019] In the figure:
[0020] 1. Base; 2. Ring-shaped light source plate; 21. First light-emitting diode; 3. Light-emitting sleeve; 31. Second light-emitting diode; 4. Light shield; 5. Light homogenizer; 6. Reflective ring; 61. Reflector; 611. First reflective surface; 612. Second reflective surface; 7. Eyeball; 8. First lens group; 82. Second lens group. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the reference drawings of specific embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0022] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in this application document to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0023] Combination Figures 1 to 2 As shown, a fundus camera lighting structure 100 includes an annular base 1, and an annular light source plate 2, a light-emitting sleeve 3, a light-homogenizing body 5 and a light-shielding cover 4 are arranged on the upper part of the base 1. A plurality of first light-emitting diodes 21 are circumferentially distributed on the plane of the annular light source plate 2, a light-emitting sleeve 3 is sleeved on the radial outer side of the annular light source plate 2, a plurality of second light-emitting diodes 31 are distributed on the radial inner side of the light-emitting sleeve 3, and the second light-emitting diodes 31 and the first light-emitting diodes 21 are arranged alternately, and an annular light-shielding cover 4 is sleeved on the outer side of the annular light source plate 2 and the light-emitting sleeve 3. An annular light-homogenizing body 5 is arranged between the light-shielding cover 4 and the light-emitting sleeve 3. A concave conical chamfer is arranged inside the light-homogenizing body 5 on the side away from the annular light source plate 2.
[0024] Combination Figures 3 to 4 As shown, a reflective ring 6 is provided at the inner bottom of the luminous sleeve 3, and a plurality of reflectors 61 are annularly distributed in the reflective ring 6, and the number of the reflectors 61 is equal to that of the second light-emitting diodes 31. First reflective surfaces 611 are provided on both sides of the circumference of the reflector 61, and a second reflective surface 612 is provided on the top of the reflector 61. The second reflective surface 612 is axially arranged opposite to the second light-emitting diode 31. The reflector 61 and the first light-emitting diode 21 are coplanar and staggered with each other, and two opposite first reflective surfaces 611 are provided on both sides of the circumference of the first light-emitting diode 21.
[0025] When using, combine Figures 1 to 5As shown, the fundus camera lighting structure 100 is arranged on the outside of the second lens group 81 at the bottom, and the first lens group 8 is arranged between the second lens group 81 and the eyeball 7. When in use, more first light-emitting diodes 21 and second light-emitting diodes 31 can be arranged by cooperating with the light-emitting sleeve 3 through the annular light source plate 2, so that the light intensity is higher and the problem of insufficient light is solved. The first light-emitting diode 21 and the second light-emitting diode 31 can be set with light-emitting diodes of different color temperatures, and the brightness and color temperature can be adjusted by the dimming device, which can simulate different lighting to avoid color deviation during observation. The illumination of the fundus camera lighting structure 100 is more uniform when combined with the reflective ring and the homogenizer. The staggered arrangement of the first light-emitting diode 21 and the second light-emitting diode 31 is more conducive to the dispersed heat dissipation of the light source and improves the service life of the light source.
[0026] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field, which belongs to the common knowledge in this field. Therefore, the present invention will not explain the control method and circuit connection in detail.
[0027] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
Claims
1. A fundus camera lighting structure, comprising an annular base (1), an annular light source plate (2) being arranged on the upper part of the base (1), a plurality of first light emitting diodes (21) being circumferentially distributed on the plane of the annular light source plate (2), characterized in that: A light-emitting sleeve (3) is sleeved radially outside the annular light source plate (2), a plurality of second light-emitting diodes (31) are distributed radially inside the light-emitting sleeve (3), the second light-emitting diodes (31) and the first light-emitting diodes (21) are arranged alternately, and an annular light shield (4) is sleeved outside the annular light source plate (2) and the light-emitting sleeve (3).
2. The fundus camera illumination structure according to claim 1, characterized in that: An annular light-distributing body (5) is provided between the light-shielding cover (4) and the light-emitting sleeve (3).
3. The fundus camera illumination structure according to claim 2, characterized in that: A concave conical chamfer is provided inside the side of the light homogenizer (5) away from the annular light source plate (2).
4. The fundus camera illumination structure according to claim 1, characterized in that: A reflective ring (6) is provided at the inner bottom of the light-emitting sleeve (3), and a plurality of reflectors (61) are distributed in a ring shape in the reflective ring (6), and the number of the reflectors (61) is equal to the number of the second light-emitting diodes (31).
5. The fundus camera illumination structure according to claim 4, characterized in that: The reflector (61) is provided with first reflective surfaces (611) on both sides of the circumference, and a second reflective surface (612) is provided on the top of the reflector (61). The second reflective surface (612) and the second light-emitting diode (31) are axially arranged opposite to each other, and the reflector (61) and the first light-emitting diode (21) are coplanar and staggered with each other.