Light source system and fundus imager

Abstract

The utility model discloses a light source system and a fundus imager. The light source system comprises a split type lens cone and a detachable focusing lens group, the split lens cone comprises an upper lens cone and a lower lens cone, the detachable focusing lens group comprises a focusing lens cone and a liquid focusing lens installed in the focusing lens cone, and the focusing lens cone is detachably connected with the upper lens cone and the lower lens cone; compared with a traditional mechanical focusing mode, the detachable liquid focusing lens can be replaced after being damaged due to the detachable installation mode, so that the use cost of equipment is reduced, and the service life is prolonged; compared with a traditional mechanical focusing system, the liquid focusing lens can reduce the overall size of equipment to a great extent, and miniaturization and portability of the equipment are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to ophthalmic imaging equipment field, especially a light source system and fundus imager. BACKGROUND

[0002] In ophthalmic surgery, the eye of the measured person is fixed, specifically, the eye of the measured person fixes the fixation pattern in the fixation optical device, such as: fixation training before surgery, or checking fixation maintenance ability. Because the eyes of different measured persons have different refractions, in order to achieve better results, the focal length needs to be adjusted according to the refraction of different to-be-measured eyes.

[0003] The existing focusing system rotates the whole lens when focusing, which causes the optical lens to rotate and affects the imaging effect; in addition, some mechanical parts, such as focusing rack and limiting piece structures, increase the overall size of the equipment, which is not conducive to miniaturization and portability. UTILITY MODEL CONTENT

[0004] The utility model provides a light source system and fundus imager, can solve at least one problem in the background art.

[0005] A light source system comprises a split lens barrel and a detachable focusing lens group.

[0006] The split lens barrel comprises an upper lens barrel and a lower lens barrel, and the detachable focusing lens group comprises a focusing lens barrel and a liquid focusing lens installed in the focusing lens barrel, and the focusing lens barrel is detachably connected with the upper lens barrel and the lower lens barrel.

[0007] Preferably, the upper lens barrel is sequentially provided with an LED light source, a band-pass filter and an aperture diaphragm.

[0008] Preferably, the lower lens barrel is sequentially provided with a first lens and a field diaphragm.

[0009] Preferably, the focusing lens barrel is threadedly connected with the upper lens barrel and / or the lower lens barrel.

[0010] Preferably, a ground glass is further installed between the LED light source and the band-pass filter.

[0011] A fundus imager comprises the above light source system and further comprises an imaging system, wherein the imaging system at least comprises an imaging camera, a second lens, a wave trap filter, a half-transmission half-reflection mirror and a short-pass dichroic mirror.

[0012] Compared with the prior art, the utility model has the beneficial effects that the utility model uses a liquid focusing lens to match different refractions of different patients.

[0013] The curvature of the liquid focusing lens is controlled by the current generated by an external motor, allowing it to be adjusted to any wavelength within a certain range, thus achieving higher image quality. Its detachable installation method, compared to traditional mechanical focusing, allows for replacement of damaged liquid focusing lenses, reducing operating costs and extending lifespan. Furthermore, the liquid focusing lens design significantly reduces the overall size of the device compared to traditional mechanical focusing systems, facilitating miniaturization and portability. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the exploded structure of the light source system;

[0015] Fig. 2 This is a schematic diagram of the internal structure of the light source system;

[0016] Fig. 3 This is a schematic diagram of a fundus imaging device.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1-Upper lens barrel, 2-Lower lens barrel, 3-Focusing lens barrel, 4-Liquid focusing lens, 5-LED light source, 6-Bandpass filter, 7-Aperture stop, 8-First lens, 9-Field stop, 10-Ground glass, 11-Imaging camera, 12-Second lens, 13-Wave notch filter, 14-Semi-transparent mirror, 15-Short-pass dichroic mirror, 16-Display. Detailed Implementation

[0019] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0020] Example 1

[0021] like Figs. 1-2 As shown in the figure, the present invention provides a light source system and fundus imaging device, including a split lens barrel and a detachable focusing lens group;

[0022] The split-type lens tube includes an upper lens tube 1 and a lower lens tube 2. The detachable focusing lens assembly includes a focusing lens tube 3 and a liquid focusing lens 4 installed in the focusing lens tube 3. The liquid focusing lens 4 is used to match the different refractive powers of different patients. The focusing lens tube 3 is detachably connected to the upper lens tube 1 and the lower lens tube 2.

[0023] The curvature of the liquid focusing lens 4 is controlled by the current generated by an external motor, enabling adjustment to any wavelength within a certain range, thereby achieving higher image quality. Its detachable installation method, compared to traditional mechanical focusing, allows for replacement of the liquid focusing lens 4 after damage, reducing equipment operating costs and extending its lifespan. Furthermore, the liquid focusing lens 4 significantly reduces the overall size of the device compared to traditional mechanical focusing systems, facilitating miniaturization and portability.

[0024] An LED light source 5, a bandpass filter 6, and an aperture stop 7 are sequentially installed inside the upper lens barrel 1.

[0025] The lower lens tube 2 is equipped with a first lens 8 and a field stop 9 in sequence. The first lens 8 is used for coupling with the objective lens.

[0026] Specifically, the focusing lens barrel 3 is threadedly connected to the upper lens barrel 1 and / or the lower lens barrel 2;

[0027] In addition, a frosted glass 10 is installed between the LED light source 5 and the bandpass filter 6. The frosted glass 10 is used to homogenize the light emitted by the LED light source 5.

[0028] Example 2

[0029] like Fig. 3 As shown, this embodiment proposes a fundus imaging device, including the light source system of Embodiment 1, and also includes an imaging system. The imaging system includes at least an imaging camera 11, a second lens 12, a wave trap filter 13, a semi-transparent and semi-reflective mirror 14, and a short-pass dichroic mirror 15. The short-pass dichroic mirror 15 is used to couple the processing optical path, the semi-transparent and semi-reflective mirror 14 is used to couple the fixation optical path, and the imaging camera 11 is connected to an external display 16.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit and essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A light source system, characterized by, The detachable focusing lens group comprises a focusing lens barrel (3) and a liquid focusing lens (4) installed in the focusing lens barrel (3), and the focusing lens barrel (3) is detachably connected with the upper lens barrel (1) and the lower lens barrel (2). The upper lens barrel (1) is sequentially installed with an LED light source (5), a band-pass filter (6) and an aperture diaphragm (7) therein.

2. A light source system as claimed in claim 1, characterized in that The lower lens barrel (2) is sequentially installed with a first lens (8) and a field diaphragm (9) therein.

3. The light source system as described in claim 1, characterized in that, The focusing lens barrel (3) is threadedly connected with the upper lens barrel (1) and / or the lower lens barrel (2).

4. A light source system as described in claim 1, characterized in that, A ground glass (10) is further installed between the LED light source (5) and the band-pass filter (6).

5. A light source system as described in claim 2, characterized in that, The imaging system at least comprises an imaging camera (11), a second lens (12), a wave trap filter (13), a half-transmission half-reflection mirror (14) and a short-pass dichroic mirror (15).

6. A fundus imaging apparatus comprising the light source system according to any one of claims 1 to 5, characterized in that, ​

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