Slit lamp

Abstract

The slit lamp comprises a shell, a light source assembly, a slit assembly, an optical filter assembly, a diffractive optical element and a reflector assembly, wherein the light source assembly, the slit assembly, the optical filter assembly, the diffractive optical element and the reflector assembly are installed in the shell. Wherein the optical filter assembly comprises a plurality of optical filters and a driving unit, and the driving unit is used for driving one optical filter to move into an optical path; the reflecting mirror assembly comprises a reflecting mirror and a reflecting mirror seat, and the reflecting mirror seat is rotationally connected with the shell; according to the slit lamp, the rotatable optical filter and the diffractive optical element are arranged, so that the slit effect is slender, a better lighting effect is achieved, and the accuracy of an operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of optical instruments, and in particular to a slit lamp. Background Technology

[0002] A slit-lamp microscope, also known as a "light scalpel," is an ophthalmic medical instrument used to illuminate the eye by passing light through a slit. By creating an optical section through the light, the microscope allows observation of the health of various parts of the eye. Common slit-lamp microscopes typically include a stage with both a slit lamp and a microscope. Through a slit-lamp microscope, one can clearly observe the eyelids, conjunctiva, sclera, cornea, anterior chamber, iris, pupil, lens, and the anterior third of the vitreous body, determining the location, nature, size, and depth of lesions. With accessories, its examination range is further expanded.

[0003] Current slit-lamp microscopes use filters that are manually rotated to change between different filters. During inspection, when repeated observation is needed, the filters must be rotated repeatedly. This structure and operating method makes it difficult to easily adjust the wavelength of the illumination light, thus hindering the achievement of better illumination results. Utility Model Content

[0004] This invention provides a slit lamp that can solve the problems pointed out in the background art.

[0005] A slit lamp includes a housing and a light source assembly, a slit assembly, a filter assembly, a diffractive optical element, and a reflector assembly installed within the housing;

[0006] The filter assembly includes multiple filters and a driving unit, which drives one of the filters to move into the optical path.

[0007] The reflector assembly includes a reflector and a reflector mount, with the reflector mount being rotatably connected to the housing.

[0008] Preferably, the assembly also includes a first lens and a second lens, the first lens being located between the light source assembly and the slit assembly, and the second lens being located between the diffractive optical element and the mirror assembly.

[0009] Preferably, the light source assembly is connected to a heat sink.

[0010] Preferably, the plurality of filters are color filters, heat insulation filters, neutral density filters, red-free filters, and cobalt blue filters.

[0011] Preferably, the driving unit includes:

[0012] A bracket, fixedly connected inside the housing, has multiple transverse guide structures corresponding one-to-one with multiple filters mounted on it, and filter holders are mounted on the transverse guide structures; and

[0013] The linear reciprocating mechanism has a slider connected to a connector. The end of the connector has a guide slope. During the movement of the connector, the guide slope abuts against the filter holder, causing the filter holder to be displaced, and the filter on the filter holder moves into the optical path.

[0014] Preferably, the linear reciprocating mechanism is a linear guide rail for a motor.

[0015] Preferably, the transverse guide structure includes a support seat and a pressure roller mounted on the bracket. The support seat and the pressure roller are in contact with the upper and lower sides of the filter holder, respectively. The filter holder is provided with a clearance groove for making way for the bracket, and a spring is installed in the clearance groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are: by setting a rotatable filter and diffractive optical elements, the slit lamp of this utility model can make the slit effect more slender, thereby achieving better lighting effect and improving the precision of surgery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the housing and the reflector mount;

[0019] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the filter driving unit.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Light source assembly, 2-First lens, 3-Slit assembly, 4-Filter, 5-Diffractive optical element, 6-Second lens, 7-Reflector, 8-Reflector mount, 9-Bracket, 10-Connector, 11-Filter holder, 12-Linear reciprocating mechanism, 13-Support base, 14-Pressure roller, 15-Spring, 16-Housing, 17-Heat sink. Detailed Implementation

[0023] 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.

[0024] like Figures 1 to 4 As shown, the slit lamp provided in this embodiment of the present invention includes a housing 16 and a light source assembly 1, a slit assembly 3, a filter assembly 4, a diffractive optical element 5, and a reflector assembly 7 installed in the housing 16.

[0025] The light source assembly 1 can be a mercury bulb or any other component that can achieve the same function. In addition, a first lens 2 is provided on the front side of the light source assembly 1 (between the light source assembly 1 and the slit assembly 3). The first lens 2 is used to focus the divergent light emitted by the light source.

[0026] Slit assembly 3 is an existing structure and will not be described in detail here;

[0027] The filter 4 assembly includes multiple filters 4 and a driving unit, which drives one of the filters 4 to move into the optical path;

[0028] The multiple filters 4 are respectively a color filter, a heat insulation filter, a light-reducing filter, a red-free filter, and a cobalt blue filter. The wavelength of the illumination light can be adjusted by switching the filters. The heat insulation filter is used to reduce the temperature of the light source and improve patient comfort. The light-reducing filter is used to reduce the brightness of the light source. The red-free filter is used to observe ocular blood vessels and hemorrhages. The cobalt blue filter is used to observe the ocular surface structure after fluorescein staining.

[0029] The types and uses of filter 4 are not limited to the above-mentioned cases. Those skilled in the art can make adaptive selections and adjustments as needed.

[0030] The diffractive optical element 5 is used to shape the light wavefront to achieve a slender slit effect. It is also an existing structure, so it will not be described in detail here.

[0031] There is also a second lens 6 between the diffractive optical element 5 and the reflector 7 assembly;

[0032] The reflector 7 assembly includes a reflector 7 and a reflector mount 8, which is rotatably connected to the housing 16.

[0033] The reflector 7 is used to flip the light rays emitted from the second lens 6 by 90 degrees in order to achieve the purpose of imaging vertically downwards;

[0034] The position of the reflector 7 can be adjusted by rotating the reflector mount;

[0035] In addition, the light source assembly 1 is connected to a heat sink 17 to improve the heat dissipation effect of the light source assembly 1.

[0036] In the existing technology, the method of switching the filter 4 is to place multiple filters 4 on a disk-shaped structure, and drive the disk-shaped structure so that one of the filters 4 is in the optical path. This method relies on the accuracy of the motor rotation angle. If there is a deviation after long-term use, it cannot be used normally.

[0037] Based on this, the drive unit of this embodiment includes a bracket 9 and a linear reciprocating mechanism 12;

[0038] The bracket 9 is fixedly connected inside the housing 16, and multiple transverse guide structures corresponding to multiple filters 4 are installed on it. The multiple transverse guide structures are distributed along the length of the bracket 9, and filter holders 11 are installed on the transverse guide structures.

[0039] The slider of the linear reciprocating mechanism 12 is connected to a connector 10. The end of the connector 10 is provided with a guide slope. During the movement of the connector 10, the guide slope abuts against the filter holder 11, so that the filter holder 11 is displaced and the filter 4 on the filter holder 11 moves into the optical path.

[0040] In this embodiment, the linear reciprocating mechanism 12 uses a motor linear guide rail, which is also installed inside the housing 16. This is an existing structure and will not be described in detail here.

[0041] Multiple filters can be automatically switched using a linear reciprocating mechanism, eliminating the need for operators to manually change them, making it more convenient.

[0042] The transverse guide structure includes a support seat 13 and a pressure roller 14 mounted on the bracket 9. The support seat 13 and the pressure roller 14 contact the upper and lower sides of the filter holder 11 respectively. The filter holder is provided with a clearance groove for the bracket 9 to make way. A spring 15 is installed in the clearance groove, and the spring 15 plays a reset role.

[0043] Alternatively, the connector 10 in this embodiment can be replaced with a cylinder, which can push the filter frame to move and achieve the same effect.

[0044] 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.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A slit lamp, characterized in that, Includes a housing and light source assembly, slit assembly, filter assembly, diffractive optical element and mirror assembly installed within the housing; The filter assembly includes multiple filters and a driving unit, which drives one of the filters to move into the optical path. The reflector assembly includes a reflector and a reflector mount, with the reflector mount being rotatably connected to the housing.

2. A slit lamp as described in claim 1, characterized in that, It also includes a first lens and a second lens, with the first lens located between the light source assembly and the slit assembly, and the second lens located between the diffractive optical element and the mirror assembly.

3. A slit lamp as described in claim 1, characterized in that, The light source assembly is connected to a heat sink.

4. A slit lamp as described in claim 1, characterized in that, The multiple filters are color filters, heat insulation filters, neutral density filters, red-free filters, and cobalt blue filters.

5. A slit lamp as described in claim 1, characterized in that, The driving unit includes: A bracket, fixedly connected inside the housing, has multiple transverse guide structures corresponding one-to-one with multiple filters mounted on it, and filter holders are mounted on the transverse guide structures; and The linear reciprocating mechanism has a slider connected to a connector. The end of the connector has a guide slope. During the movement of the connector, the guide slope abuts against the filter holder, causing the filter holder to be displaced, and the filter on the filter holder moves into the optical path.

6. A slit lamp as described in claim 5, characterized in that, The linear reciprocating mechanism is a linear guide rail for a motor.

7. A slit lamp as described in claim 5, characterized in that, The lateral guide structure includes a support base and a pressure roller mounted on the bracket. The support base and the pressure roller are in contact with the upper and lower sides of the filter frame, respectively. The filter frame is provided with a clearance groove for the bracket to make way, and a spring is installed in the clearance groove.

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