Filter structure

Abstract

The invention relates to the technical field of light feeding instruments, in particular to a filter structure which comprises a shell, a liquid light filtering structure and an adjusting assembly. The liquid filtering structure is mounted in the shell; the adjusting assembly is installed at the light emitting end of the shell. When the device is used, the narrow-band laser filters are installed at the two ends of the shell, the shell is filled with the light filtering liquid through the liquid path channel, and the narrow-band laser filters and the light filtering liquid act together, so that light obtained through the structure conforms to standard broadband light for human eye treatment; when radiation light of the light source passes through the light filtering liquid, heat radiation generated by the light source is transferred by the light filtering liquid, and human eyes are prevented from being hurt by heat of the light source. The adjusting assembly is arranged at the light emitting end of the shell, the position of the continuous gradual change type optical filter is adjusted through the conveying rack, the spectral radiation intensity of the light source is adjusted according to the actual application requirements of different crowds, and the purpose that the sun-like radiation spectrum and radiation intensity of light emitted by the device are similar to those of sunlight is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of light-feeding instruments, and in particular to a filter structure. Background Art

[0002] With the change of modern lifestyle, the incidence of myopia (also called nearsightedness or shortsightedness) has increased year by year, especially among children and adolescents, becoming a global public health problem. Myopia not only affects the quality of life of individuals, but also may increase the risk of other eye diseases, such as retinal detachment, glaucoma and cataracts.

[0003] At present, the treatment and control methods of myopia mainly include: 1. Wearing glasses or contact lenses, which can correct vision but cannot prevent the development of myopia. 2. Laser surgery: such as LASIK or PRK, these surgeries can reduce dependence on glasses or contact lenses, but are not suitable for everyone, especially young patients or patients whose myopia is still changing. 3. Drug therapy, such as the use of atropine eye drops, but long-term use may have side effects. 4. Control environmental factors: increase outdoor activity time and reduce close eye time. Although studies have shown that this can help control the development of myopia, it is difficult to achieve in the modern pace of life, especially in urban environments.

[0004] There are many existing technologies for treating and controlling myopia, such as:

[0005] Chinese patent announcement number CN114177537A discloses a light-feeding device with adjustable treatment intensity, comprising: a bottom support assembly, a red light generating assembly, a lens barrel assembly and a control unit. The bottom support assembly is used to form the installation base of the light-feeding device with adjustable treatment intensity, and the bottom support assembly includes a base, a hollow support column and a support rod, the base is horizontally arranged, the hollow support column is vertically and fixedly installed on the upper part of the base, and the support rod is installed inside the upper end of the hollow support column through an adjusting bolt; the red light generating assembly is used to generate red light.

[0006] It can be seen that most of the current light-feeding devices include a lens barrel assembly. By setting a red light generating assembly and adjusting the distance between the red light laser emitter and the filter, the intensity of the red light entering the lens barrel assembly can be adjusted to meet the needs of myopic patients with different degrees of myopia. However, under normal conditions, light in the wavelength range of 600nm to 1100nm in sunlight has the best therapeutic effect on human myopia. Although a single infrared light can be effective in treating myopia in the human eye, its effect is not as good as sunlight. Moreover, when infrared light is used to irradiate the human eye at close range, the heat generated will cause irreversible damage to the human eye.

[0007] In view of this, we propose a filter structure. Summary of the invention

[0008] The object of the present invention is to provide a filter structure to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A filter structure comprises a housing, a liquid light filtering structure and an adjustment component;

[0011] A liquid filter structure is installed inside the shell, comprising narrow-band laser filters fixed to both ends of the shell, a liquid channel connected to the shell and the space enclosed by the narrow-band laser filter, and a detector installed in the shell for detecting the temperature and conductivity of the filter liquid;

[0012] The adjustment component is installed at the light-emitting end of the shell, and includes a continuous gradient optical filter and a transmission rack, wherein the continuous gradient optical filter adjusts the spectral radiation intensity after passing through the liquid filter structure; the transmission rack adjusts the position of the continuous gradient optical filter relative to the shell.

[0013] As a further solution of the present invention: installation grooves are respectively provided at both ends of the shell, and the narrow-band laser filter is placed in the installation grooves.

[0014] As a further solution of the present invention: the two ends of the shell are respectively the incident end and the emission end of the light source.

[0015] As a further solution of the present invention: the working optical tolerance angle of the narrow-band laser filter is ≥5°, and the out-of-band suppression optical density value is ≥4.

[0016] As a further solution of the present invention: the conductivity of the filter liquid in the liquid filter structure is ≤0.5μS / cm, the bacterial content is lower than 1CFU / ml, and the average transmittance in the wavelength spectrum range of 600nm to 1100nm is ≥85%.

[0017] As a further solution of the present invention: the injection end includes a pressing plate, which is fixed to the shell by bolts and limits the narrow-band laser filter close to the injection end, and a first gasket is installed between the pressing plate and the narrow-band laser filter.

[0018] As a further solution of the present invention: the emission end includes a flange, which is fixed to the shell by bolts and limits the narrow-band laser filter close to the emission end, and a second gasket is installed between the flange and the narrow-band laser filter.

[0019] As a further solution of the present invention: the transmission rack is installed on a side of the flange away from the narrow-band laser filter, and the transmission rack is engaged with the continuous gradient optical filter.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The filter structure is achieved by installing narrow-band laser filters at both ends of the shell and filling the shell with filter liquid through a liquid channel. The narrow-band laser filter filters out visible light and ultraviolet light with a wavelength range not greater than 600nm in the light radiated by the light source, and the filter liquid filters out infrared light with a wavelength range greater than 1100nm, so that the light passing through the structure meets the human eye treatment standards.

[0022] 2. In this filter structure, when the light radiated by the light source passes through the filter liquid, the heat radiation generated by the light source itself is absorbed by the filter liquid, and the heat transfer generated by the mid-infrared and far-infrared light is also absorbed, thus avoiding damage to the human eye caused by the light source and thermal damage to the laser filters at both ends, which is not available in the current filtering technology.

[0023] 3. The filter structure sets an adjustment component at the light-emitting end of the shell, uses a transmission rack to adjust the position of the continuous gradient optical filter, and then adjusts the sagittal plane of the light path, so that the spectral radiation intensity of the entire light source is adjusted, which is beneficial to the light emitted by the structure, and its radiation intensity is similar to that of sunlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0025] Figure 2 This is the overall structural cross-section diagram of this scheme.

[0026] The meaning of each number in the figure is:

[0027] 110, injection end; 111, pressing plate; 112, first gasket; 120, liquid filtering structure; 121, housing; 122, narrow-band laser filter; 123, detector; 124, liquid channel; 130, injection end; 131, second gasket; 132, flange; 140, adjustment component; 141, continuous gradient optical filter; 142, transmission rack. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example

[0030] Currently, most of the light-feeding devices include a lens barrel assembly. By setting a red light generating assembly and adjusting the distance between the red light laser emitter and the filter, the intensity of the red light entering the lens barrel assembly can be adjusted to meet the needs of myopic patients with different degrees of myopia. However, under normal conditions, light in the wavelength range of 600nm to 1100nm in sunlight is most effective in treating myopia in the human eye. Although a single infrared light can be effective in treating myopia in the human eye, its effect is not as good as that of sunlight. Moreover, when infrared light is used to irradiate the human eye at close range, the heat generated will cause irreversible damage to the human eye.

[0031] Therefore, please refer to Figure 1 and Figure 2 As shown, the purpose of this embodiment is to provide a filter structure, which includes a shell 121; considering that the therapeutic effect of a single infrared light is not as good as that of sunlight, and in order for the wavelength range of sunlight passing through the filter structure to be more in line with the treatment standard for the human eye, a liquid filter structure 120 is installed inside the shell 121, and the liquid filter structure 120 includes a narrow-band laser filter 122 fixed at both ends of the shell 121. The narrow-band laser filter 122 is used to filter out visible light and ultraviolet light with a wavelength range not greater than 600nm in the radiation light of the light source. The working spectrum range of the narrow-band laser filter 122 can be adjusted according to actual use needs, its working optical tolerance angle is ≥5°, and its out-of-band suppression OD value is ≥4, which effectively realizes ultraviolet and visible Selective filtering of light. At the same time, a liquid channel 124 is opened on the surface of the shell 121, and the liquid channel 124 is connected to the space enclosed by the shell 121 and the narrow-band laser filter 122. The shell 121 is filled with filter liquid by using the liquid channel 124, and the filter liquid filters infrared light with a wavelength range greater than 1100nm, so that the light passing through the structure meets the human eye treatment standard. The filter liquid adopts the following standards: ultra-low conductivity, at an operating temperature of 25°C, its conductivity is ≤0.5μS / cm, at an operating wavelength of 650nm, its transmittance is ≥95%, at an operating wavelength of 650nm, its average transmittance is ≥85% in the wavelength spectrum range of 600nm to 1100nm, and the bacterial content is less than 1CFU / ml, so as to meet the needs of human eye treatment;

[0032] In addition, the liquid path channel 124 is connected to an external liquid circulation device, so that the heat radiation generated by the light source is absorbed and transferred by the filter liquid, and the entire filter structure can be used for a long time to avoid the heat generated by the light source from causing damage to the human eye. Considering that the filter liquid needs to maintain high purity to reduce the influence of impurity ions in the solution on the filtered wavelength, but in the process of filtering the filter liquid, there is no specific data for people to observe, so that the observer can understand the specific situation of the filter liquid. Therefore, the inner cavity of the shell 121 is also equipped with a detector 123. The detector 123 can not only detect the conductivity of the filter liquid, so that the observer can evaluate the purity of the filter liquid according to the conductivity data, such as the smaller the measured conductivity data, the higher the purity of the filter liquid, but also detect the temperature of the filter liquid, and control the opening and closing of the external liquid circulation device according to the detected temperature data to achieve automatic adjustment.

[0033] Since the spectral radiation intensity of the light source filtered by the narrow-band laser filter 122 and the filter liquid is too high or too low, it will have an adverse effect on the human eye. Therefore, an adjustment component 140 is also installed at the light output end of the shell 121. The adjustment component 140 includes a continuous gradient optical filter 141 and a transmission rack 142. The transmission rack 142 is meshed with the continuous gradient optical filter 141. The transmission rack 142 controls the movement of the continuous gradient optical filter 141 to adjust the sagittal plane of the light path to control the output light source spectral radiation intensity to be within the radiation intensity range of the solar spectrum, that is, within the range of 25000Lx to 30000Lx, and the 8-hour RMS value (root mean square value, representing light intensity fluctuation) of the radiation intensity stability is less than or equal to 5%, and the 8-hour PV value (peak-to-valley value, representing the difference between the maximum and minimum values ​​of data within a period of time) of the energy fluctuation is less than or equal to 8%, so that the light emitted by the filter structure has a radiation intensity similar to that of sunlight;

[0034] Considering the convenience of installing the narrow-band laser filter 122, the two ends of the housing 121 are respectively the incident end 110 and the emission end 130 of the light source, and the incident end 110 and the emission end 130 of the housing 121 are both provided with mounting grooves, and the narrow-band laser filter 122 is placed in the mounting grooves. At the same time, in order to fix the narrow-band laser filter 122 at each end, the incident end 110 includes a pressing plate 111, which is fixed to the housing 121 by bolts and limits the narrow-band laser filter 122 close to the incident end 110; the emission end 130 includes a flange 132, The flange 132 is fixed to the shell 121 by bolts and limits the narrow-band laser filter 122 close to the emission end 130; at the same time, in order to prevent the pressing plate 111 and the flange 132 from crushing the narrow-band laser filter 122 during installation, a first gasket 112 is installed between the pressing plate 111 and the narrow-band laser filter 122, and a second gasket 131 is installed between the flange 132 and the narrow-band laser filter 122; in order to facilitate the fixation of the transmission rack 142, the transmission rack 142 is installed on the side of the flange 132 away from the narrow-band laser filter 122 by bolts.

[0035] In summary, the working principle of this solution is as follows:

[0036] After placing the narrow-band laser filter 122 in the mounting groove of the housing 121, the first gasket 112 and the pressing plate 111 are sequentially placed on the injection end 110 of the housing 121, and the first gasket 112 and the pressing plate 111 are fixed to the housing 121 by bolts. The second gasket 131 and the flange 132 are sequentially placed on the emission end 130 of the housing 121, and the second gasket 131 and the flange 132 are fixed to the housing 121 by bolts. Then, the transmission rack 142 is installed on the side of the flange 132 away from the narrow-band laser filter 122 by bolts, and the continuous gradient optical filter 141 is meshed and installed with the transmission rack 142. Finally, the external liquid circulation device is connected to the liquid channel 124, and the installation of the entire device can be completed.

[0037] When treating the human eye, the space enclosed by the shell 121 and the narrow-band laser filter 122 is first filled with an external liquid circulation device, and then the light source passes through the narrow-band laser filter 122, the filter liquid, the narrow-band laser filter 122 and the continuously gradient optical filter 141 in sequence, thereby filtering out the visible light and ultraviolet light with a wavelength range not exceeding 600nm, the infrared light with a wavelength range greater than 1100nm, absorbing the radiant heat generated by the light source, and controlling the output light source spectrum radiation intensity to be within the radiation intensity range of the solar spectrum. At the same time, during treatment, the detector 123 detects the conductivity and temperature of the filter liquid, and transmits the detection information to the background system for display, prompting the observer whether the filter liquid needs to be replaced and controlling the opening and closing of the external liquid circulation device.

[0038] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0039] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A filter structure, comprising a housing (121), characterized in that: Also included is a liquid light filtering structure (120) and an adjustment component (140); A liquid filter structure (120) is installed inside the housing (121), comprising narrow-band laser filters (122) fixed to both ends of the housing (121), a liquid channel (124) connected to the housing (121) and the space enclosed by the narrow-band laser filter (122), and a detector (123) installed in the housing (121) for detecting the temperature and conductivity of the filter liquid; The adjustment component (140) is installed at the light output end of the housing (121), and comprises a continuous gradient optical filter (141) and a transmission rack (142), wherein the continuous gradient optical filter (141) adjusts the spectral radiation intensity after passing through the liquid filter structure (120); and the transmission rack (142) adjusts the position of the continuous gradient optical filter (141) relative to the housing (121).

2. The filter structure according to claim 1, characterized in that: The housing (121) has mounting grooves at both ends, and the narrow-band laser filter (122) is placed in the mounting grooves.

3. The filter structure according to claim 1, characterized in that: The two ends of the housing (121) are respectively an incident end (110) and an emission end (130) of the light source.

4. The filter structure according to claim 1, characterized in that: The narrow-band laser filter (122) has a working optical tolerance angle of ≥5° and an out-of-band suppression optical density value of ≥4.

5. The filter structure according to claim 1, characterized in that: The conductivity of the filter liquid in the liquid filter structure (120) is ≤0.5 μS / cm, the bacterial content is lower than 1 CFU / ml, and the average light transmittance in the wavelength spectrum range of 600 nm to 1100 nm is ≥85%.

6. The filter structure according to claim 3, characterized in that: The injection end (110) comprises a pressing plate (111), wherein the pressing plate (111) is fixed to a housing (121) by means of bolts and limits a narrow-band laser filter (122) close to the injection end (110), and a first gasket (112) is installed between the pressing plate (111) and the narrow-band laser filter (122).

7. The filter structure according to claim 3, characterized in that: The emission end (130) comprises a flange (132), the flange (132) being fixed to the housing (121) by bolts and limiting the narrow-band laser filter (122) close to the emission end (130), and a second gasket (131) being installed between the flange (132) and the narrow-band laser filter (122).

8. The filter structure according to claim 7, characterized in that: The transmission rack (142) is installed on a side of the flange (132) away from the narrow-band laser filter (122), and the transmission rack (142) is meshed with the continuous gradient optical filter (141).

Images