Slit projection light path system and lighting system of slit lamp

Abstract

The utility model discloses a slit projection light path system and a lighting system of a slit lamp, and belongs to the technical field of slit lamps. The light path system comprises a first light path and a second light path which are symmetrically arranged, the first light path comprises a first light source and a first optical lens set, the second light path comprises a second light source and a second optical lens set, the first light path and the second light path are each provided with a slit light-transmitting structure, the first light source is a white light source, and the second light source is a white light source. The second light source is an infrared light source. The double light sources provided by the utility model can complement each other, the infrared light source can improve the comfort of ophthalmic examination, and the white light source can be used under special requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of slit lamp, especially relates to a slit projection optical path system. BACKGROUND

[0002] Slit lamp is the important instrument that cataract ophthalmic examination is indispensable, slit lamp and camera constitute a set of cataract inspection system, through slit lamp irradiation fundus, by camera photograph, then judge the turbidity of eye lens, if the turbidity of eye lens is high, judge the possibility of cataract lesion.

[0003] Slit lamp is composed of light source and slit adjusting structure, it not only can make superficial lesion observe very clearly, and can adjust focal point and light source width, make "optical section", make deep tissue lesion also can clearly appear.

[0004] The light source of traditional slit lamp only adopts white light halogen lamp light source, lacks light source complementarity, and the strong light irradiation of halogen lamp can easily cause eye discomfort, and the use experience is poor. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a slit lamp that adopts the combination of white light source and infrared light source, realizes the complementarity of light source, avoids the defect of dazzling of white light by using infrared light, and helps to improve the use experience of users.

[0006] In view of the above technical problem, the utility model provides the following technical scheme:

[0007] A slit projection optical path system, comprising: symmetrically arranged first light path and second light path, the first light path comprises first light source and first optical lens group, the second light path comprises second light source and second optical lens group, slit light transmission structure is arranged on the first light path and the second light path respectively, the first light source is white light source, and the second light source is infrared light source.

[0008] In some embodiments of the utility model, the first optical lens group and the second optical lens group respectively comprise: collimating lens, first projection lens, first mirror and second projection lens.

[0009] In some embodiments of the utility model, slit light transmission structure is arranged between the collimating lens and the first projection lens, the slit light transmission structure is light transmission structure with adjustable slit width, and the light emitted from the collimating lens passes through the slit light transmission structure to the first projection lens side.

[0010] In some embodiments of the utility model, the slit light transmission structure comprises a fixed support provided with a light transmission hole, and a first sliding seat and a second sliding seat slidingly connected to one side of the fixed support, the first sliding seat and the second sliding seat are synchronously moved away from or close to each other under the action of a driving assembly, so as to change the size of the light transmission area.

[0011] In some embodiments of the utility model, the fixed support is provided with a sliding track extending in the horizontal direction, and the first sliding seat and the second sliding seat slide along the sliding track under the driving action of the driving assembly.

[0012] In some embodiments of the utility model, the driving assembly comprises a driving motor, a driving seat connected to the output shaft of the driving motor and moving in the vertical direction, and a first connecting rod and a second connecting rod pivotally connected to the driving seat, one end of the first connecting rod is pivotally connected to the first sliding seat, and the other end of the second connecting rod is pivotally connected to the second sliding seat.

[0013] In some embodiments of the utility model, the first light source and the second light source are both LED light sources.

[0014] The utility model discloses a slit lamp's lighting system simultaneously, including slit projection optical path system, slit projection optical path system installs on the mounting support.

[0015] In some embodiments of the utility model, the mounting support has a symmetrical center line, the first light path and the second light path are symmetrically arranged on both sides of the symmetrical center line, and the light passing through the first optical lens group and the light passing through the second optical lens group have an included angle of not 0 degrees with respect to the symmetrical center line.

[0016] In some embodiments of the utility model, the mounting support comprises a first mounting plate, the first optical lens group, the second optical lens group and the slit light transmission structure are installed on the first mounting plate, and the first light source and the second light source are installed on a second mounting plate located below the first mounting plate and spaced apart from the first mounting plate.

[0017] The technical scheme of the utility model has the following technical effects compared with the prior art:

[0018] In the illumination system of the slit projection light path system and the slit lamp, by adopting the double light source symmetrical light path, when checking, the user can select to check by using the infrared light source and the white light source, two sets of light sources form mutual complementation, and the use range is expanded. When checking by using the infrared light source, the infrared light is invisible light, and discomfort of the human eye is avoided, the pupil contraction is avoided, the internal condition of the eye is beneficial to observation, and the use experience of the user is greatly improved. In some cases, for example, color pictures of the photographed fundus or lens are needed, the white light source is used for checking, and the camera imaging of the cataract checking system is a color picture. Another purpose of arranging the white light source is that the device provided by the utility model can be compared with the existing device with the halogen lamp in the market.

[0019] For example, due to the double light source symmetrical light path, when checking, the light path where the infrared light source is located can be used for focusing first, and even when the white light source is switched for checking, the cumbersome re-focusing or the time required for focusing is reduced, the strong visible light entering the eye time is greatly reduced, and the comfort of the user is improved.

[0020] Meanwhile, the first light source and the second light source both adopt LED light sources, compared with the existing halogen lamp light source, the volume is small, the arrangement is convenient, and the light intensity is convenient to adjust. BRIEF DESCRIPTION OF DRAWINGS

[0021] The preferred embodiments of the utility model will be described in detail below with the help of the drawings, which will help to understand the purpose and advantages of the utility model, and the drawings are as follows:

[0022] Figure 1 It is a top view of a specific embodiment of the slit projection light path system of the utility model;

[0023] Figure 2 It is a system principle diagram of another specific embodiment of the slit projection light path system of the utility model;

[0024] Figure 3 It is a system principle diagram of another specific embodiment of the slit projection light path system of the utility model;

[0025] Figure 4 It is a structure schematic view of a specific embodiment of the slit light transmission structure in the slit projection light path system of the utility model;

[0026] Figure 5 It is a schematic view of a specific embodiment of the illumination system of the slit lamp of the utility model. DETAILED DESCRIPTION

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1-5 The diagram shows a specific embodiment of the slit projection optical path system provided by this utility model, which is used in the illumination system of a slit lamp. The optical path system includes a first optical path 100a and a second optical path 100b arranged symmetrically. Figure 1 The dashed line represents the direction of the light path. The first light path 100a includes a first light source 10a and a first optical lens group 20a, and the second light path 100b includes a second light source 10b and a second optical lens group 20b. Slit-type light-transmitting structures 30 are respectively provided on the first light path 100a and the second light path 100b. The slit-type light-transmitting structures 30 can cause light to form a light blade. After the light blade illuminates an object, it can form a series of "optical facets" to clearly observe various parts of the object. Specifically, the first light source 10a is a white light source with a color temperature of approximately 8500K, and the second light source 10b is an infrared light source with a center wavelength of approximately 850nm.

[0032] The aforementioned slit projection optical path system employs a dual-source symmetrical optical path, with the first optical path 100a and the second optical path 100b arranged symmetrically. The first source 10a of the first optical path 100a uses a white light source, while the second source 10b of the second optical path 100b uses an infrared light source. The matching cataract examination system uses a camera with infrared imaging capabilities. When using infrared imaging, the image of the fundus or lens captured by the camera is a black and white image; when using white light imaging, the image of the fundus or lens captured by the camera is a color image.

[0033] During the inspection, the infrared light source (second light source 10b) on the second optical path 100b can be used or preferably used for focusing and inspection. Since the human eye is not sensitive to 850nm infrared light, even if the focusing time is long, it will not cause discomfort to the human eye, avoid pupil constriction, and facilitate observation of the internal condition of the eye, greatly improving the user experience.

[0034] In some cases, such as when it is necessary to take color images of the fundus or lens to see the lesion more clearly, a white light source (first light source 10a) is used for examination, which complements the aforementioned infrared light source examination and expands the scope of application.

[0035] Furthermore, since the first optical path 100a and the second optical path 100b are symmetrically arranged, when using a white light source for inspection, the second optical path 100b, where the infrared light source is located, can be used for focusing first. When the infrared light source is in focus, based on the symmetry between the first optical path 100a and the second optical path 100b, even if the inspection is switched to a white light source, the tediousness of refocusing or the focusing time can be reduced, which greatly reduces the time that strong visible light enters the eye, thereby improving the user's comfort.

[0036] In one embodiment, the first optical lens group 20a and the second optical lens group 20b have the same constituent lenses and are symmetrically distributed, such as... Figure 1 , Figure 2 As shown, along the optical path, it includes: a collimating lens 21, a first projection lens 23, a first reflecting mirror 24, and a second projection lens 25.

[0037] In this embodiment, the collimating lens 21 faces directly toward the first projection lens 23. The collimating lens 21 transforms the light from each point of the first light source 10a / second light source 10b into a parallel collimated beam, ensuring the parallelism of the beam, and directs it toward the first projection lens 23. The first projection lens 23 then concentrates the light and projects it onto the first reflecting mirror 24. After being reflected by the first reflecting mirror 24, the light passes through the second projection lens 25, which then concentrates the light and projects it onto the object being examined (i.e., the human eye), forming a bright and focused beam of light to better observe the lesions in the eyeglasses.

[0038] In one embodiment, in order to achieve the vertical arrangement of the collimating lens 21, as shown in Figure 3 A second mirror 22 is arranged above the collimating lens 21 to reflect the light emitted by the collimating lens 21 to the first projection lens 23. In one embodiment, in order to ensure the imaging quality of the slit light source, the slit light transmission structure 30 is arranged between the collimating lens 21 and the first projection lens 23, which is a light transmission structure with continuously adjustable slit width, for example, the slit width is adjusted between 0-14mm, and the light emitted by the collimating lens 21 passes through the slit light transmission structure 30 to the side of the first projection lens 23. In the diffuse light projection method, the slit light width is large, which is used to observe the anterior segment of the eye, including the bulbar conjunctiva, the sclera, the iris, the lid margin and the ectropion conjunctiva of the eyelid; in the direct projection method, the slit light width is small, which is used to observe the curvature of the cornea, the thickness of the cornea, the corneal scar and the contact lens deposit.

[0039] Of course, if the second mirror 22 is arranged between the collimating lens 21 and the first projection lens 23, the slit light transmission structure 30 is arranged between the second mirror 22 and the first projection lens 23.

[0040] Specifically, in one optional embodiment, as shown in Figure 3 The slit light transmission structure 30 includes a fixed support 31 provided with a light transmission hole, and a first sliding seat 32 and a second sliding seat 33 slidingly connected to one side of the fixed support 31, and the first sliding seat 32 and the second sliding seat 33 are driven by a driving assembly to move in the direction away from or close to each other to change the size of the light transmission area. The first sliding seat 32 and the second sliding seat 33 are located outside the fixed support 31, which is convenient for installation and fixation, and the moving range of the first sliding seat 32 and the second sliding seat 33 is large, which is convenient for controlling the position accuracy.

[0041] More specifically, the fixed support 31 is provided with a sliding rail 34 extending in the horizontal direction, and the first sliding seat 32 and the second sliding seat 33 slide along the sliding rail 34 under the driving action of the driving assembly. More specifically, the sliding rail 34 is configured in the form of a sliding shaft, and the upper and lower sides of the first sliding seat 32 and the second sliding seat 33 are respectively slidingly connected to the sliding rail 34 through sliding bushings, and the sliding bushings are interference connected to the mounting holes of the first sliding seat 32 and the second sliding seat 33.

[0042] Specifically, in an alternative embodiment, the driving assembly comprises a driving motor 35, a driving base 36 connected to the output shaft of the driving motor 35 and moving in the vertical direction, and a first connecting rod 37 and a second connecting rod 38 pivotally connected to the driving base 36, one end of the first connecting rod 37 being pivotally connected to the first sliding base 32, and one end of the second connecting rod 38 being pivotally connected to the second sliding base 33. The driving motor 35 drives the driving base 36 to move in the vertical direction, and the first connecting rod 37 and the second connecting rod 38 drive the first sliding base 32 and the second sliding base 33 to synchronously slide along the first sliding rail 34 to realize the mutual approach or separation of the two.

[0043] Specifically, in an alternative embodiment, the first light source 10a and the second light source 10b are both LED light sources, which are smaller in size than the existing halogen lamp light source, are convenient to arrange, and are also convenient to adjust the light intensity.

[0044] As Figure 4 The specific embodiment of the illumination system of the slit lamp provided by the utility model is shown in the figure, which comprises a mounting support 40 and the above-mentioned slit projection light path system mounted on the mounting support 40.

[0045] Specifically, the mounting support 40 has a center line of symmetry (as Figure 1 The first light path 100a and the second light path 100b are symmetrically mounted on both sides of the center line of symmetry of the mounting support 40, and the light passing through the first optical lens group 20a and the light passing through the second optical lens group 20b have an included angle of not 0 degrees with respect to the center line of symmetry.

[0046] Specifically, the mounting support 40 comprises a first mounting plate 41, the plate surface of the first mounting plate 41 is arranged in the substantially horizontal direction, and is shaped as a substantially isosceles trapezoidal structure, the mounting support 40 further comprises a supporting structure for supporting the first mounting plate 41, the first optical lens group 20a, the second optical lens group 20b and the slit light transmission structure 30 are mounted on the upper side of the first mounting plate 41, wherein the first optical lens group 20a and the second optical lens group are arranged in sequence along the waist line of the first mounting plate 41 which is approximately an isosceles trapezoid, the collimating lens 21 of the first optical lens group 20a and the second optical lens group is mounted on the short side close to the first mounting plate 41, and the second projection lens 25 of the first optical lens group 20a and the second optical lens group is mounted on the long side close to the first mounting plate 41.

[0047] The first light source 10a and the second light source 10b are mounted on the second mounting plate 42 which is located on the lower side of the first mounting plate 41 and is arranged in a spaced manner with the first mounting plate 41.

[0048] Specifically, the support structure comprises a support column 43 extending in a vertical direction and a third mounting plate 44 extending in a substantially horizontal direction, and the second mounting plate 42 is fixedly connected to the third mounting plate 44.

[0049] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A system for a slit projection optical path, characterized by, The application relates to a slit projection optical path system. The first optical path and the second optical path are symmetrically arranged, the first optical path comprises a first light source and a first optical lens group, the second optical path comprises a second light source and a second optical lens group, a slit light-transmitting structure is arranged on the first optical path and the second optical path respectively, the first light source is a white light source, and the second light source is an infrared light source.

2. The system of claim 1, wherein the slit is formed by a slit mask having a slit width of 0.1 mm or less. The first optical lens group and the second optical lens group respectively comprise a collimating lens, a first projection lens, a first reflector and a second projection lens.

3. The system of claim 2, wherein the slit is located at a position where the light beam is parallel to the optical axis of the optical system. A slit light-transmitting structure is arranged between the collimating lens and the first projection lens, the slit light-transmitting structure is a light-transmitting structure with adjustable slit width, and the light emitted from the collimating lens passes through the slit light-transmitting structure to the side of the first projection lens.

4. The system of claim 3, wherein the slit is formed by a slit mask having a slit width of 0.1 mm or less. The slit light-transmitting structure comprises a fixed support provided with a light-transmitting hole, and a first sliding seat and a second sliding seat slidingly connected to one side of the fixed support, the first sliding seat and the second sliding seat are synchronously moved away from or close to each other under the action of a driving assembly, so as to change the size of a light-transmitting area.

5. The system of claim 4, wherein the slit projection optical path is configured to project the slit image onto the sample at a first angle of incidence and to project the slit image onto the sample at a second angle of incidence different from the first angle of incidence. A sliding track extending in the horizontal direction is arranged on the fixed support, and the first sliding seat and the second sliding seat slide along the sliding track under the driving action of the driving assembly.

6. The system of claim 5, wherein the slit projection optical path is configured to project the slit image onto the sample at a magnification of 1:

1. The driving assembly comprises a driving motor, a driving seat connected to the output shaft of the driving motor and moving in the vertical direction, and a first connecting rod and a second connecting rod pivotally connected to the driving seat, one end of the first connecting rod is pivotally connected to the first sliding seat, and one end of the second connecting rod is pivotally connected to the second sliding seat.

7. The system of claim 1, wherein the slit projection optical path is configured to project a slit image onto the sample. The first light source and the second light source are both LED light sources.

8. An illumination system for a slit lamp, characterized in that The application further relates to a slit projection optical path system as claimed in any one of claims 1 to 7, which is mounted on a mounting support.

9. The slit lamp illumination system of claim 8, wherein, The mounting support has a symmetric center line, the first optical path and the second optical path are symmetrically arranged on the two sides of the symmetric center line, and the light passing through the first optical lens group and the light passing through the second optical lens group have an included angle of not 0 degrees with respect to the symmetric center line.

10. The slit lamp illumination system of claim 9, wherein, The mounting support comprises a first mounting plate, the first optical lens group, the second optical lens group and the slit light-transmitting structure are mounted on the first mounting plate, and the first light source and the second light source are mounted on a second mounting plate arranged below the first mounting plate and spaced from the first mounting plate.

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