Red light diffraction glasses

Abstract

The utility model relates to the technical field of ophthalmology medical instruments, and discloses a pair of red light diffraction glasses, which comprises a glasses frame and a fixing piece, the glasses frame is fixed at eyes through the fixing piece, diffraction lenses are arranged on the glasses frame, diffraction gratings are engraved in the diffraction lenses, and the farther the diffraction gratings are from the centers of the diffraction lenses. The larger the period of the diffraction grating is, the diffraction grating is used for diffracting the red light in the incident light beam and converging the red light to a preset area. According to the red light diffraction glasses, light sources such as lasers or LEDs do not need to be arranged, the stability and the safety are both improved, and the size of the glasses is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ophthalmic medical equipment, in particular to a pair of red light diffraction glasses. Background Art

[0002] Red light eye treatment is a new method that irradiates the retina with light of a specific wavelength, causing the choroid in the center of the macula to thicken, provide more oxygen supply, improve scleral hypoxia, control axial length growth, relieve visual fatigue, and play a certain role in assisting the improvement of eye vision.

[0003] Since the intensity of red light in natural light is low, conventional ophthalmology devices or other ophthalmic light therapy products usually use a laser or LED light source to emit a light beam, and use multiple optical devices to even the light to obtain the required even light spot. However, due to the lack of stability and safety of the laser, and the presence of the light source, the overall space is large and inconvenient to use.

[0004] Therefore, there is an urgent need for a passive solution that can collect red light from visible light sources such as sunlight to relieve visual fatigue and thus have a certain effect in assisting the improvement of eye vision. Utility Model Content

[0005] In view of this, the utility model provides a red light diffraction glasses, which can overcome the technical problems in the prior art that the ophthalmic phototherapy products need to be equipped with laser or LED light sources, resulting in low stability and safety, and large size.

[0006] The utility model provides a red light diffraction glasses, which are used for alleviating visual fatigue and assisting in improving eye vision, and comprise a frame and a fixing part, wherein the frame is fixed to the eye by the fixing part, the frame is provided with a diffraction lens, a diffraction grating is engraved inside the diffraction lens, the farther the diffraction grating is from the center of the diffraction lens, the larger the period of the diffraction grating is, and the diffraction grating is used to diffract the red light in the incident light beam and converge it to a preset area.

[0007] Optionally, the diffraction lens includes a central light-transmitting area and a diffraction area arranged around the central light-transmitting area, the diffraction area is provided with a plurality of layers, and the diffraction grating is arranged in each layer of the diffraction area.

[0008] Optionally, the diffraction grating includes a transparent portion and an opaque portion that are arranged at intervals.

[0009] Optionally, the widths of the transparent portion and the opaque portion meet the following requirements:

[0010] (a+b)sinθ=kλ

[0011] Wherein, a is the width of the transparent part, b is the width of the opaque part, θ represents the angle between the light beam and the normal after passing through the diffraction grating, k is the diffraction order, and λ is the central wavelength of the red light.

[0012] Optionally, the central wavelength of the red light diffracted by the diffraction grating and focused to the preset area is in the range of 620nm-750nm, and the diffraction order is ±1.

[0013] Optionally, the diffraction region is an annular region arranged concentrically with the central light-transmitting region, and the period of the diffraction grating in each layer of the diffraction region is the same.

[0014] Optionally, the red light diffraction glasses further include a collimating lens, which is disposed behind the diffraction lens and is used to collimate the diffracted and converged red light to form parallel light.

[0015] Optionally, the collimating lens is a concave lens.

[0016] Optionally, the red light diffraction glasses further include a fixing frame, wherein the fixing member is a temple, one end of the fixing frame is connected to the frame or the temple, and the other end of the fixing frame is connected to the collimating lens.

[0017] Optionally, the diameter of the diffraction lens is 3 cm to 6 cm, and the diameter of the collimating lens is 5 mm to 3 cm.

[0018] The red light diffraction glasses of the utility model have at least the following beneficial effects:

[0019] The utility model discloses a pair of red light diffraction glasses, a diffraction lens is provided on a frame, a diffraction grating is engraved inside the diffraction lens, the farther the diffraction grating is from the center of the diffraction lens, the larger the period of the diffraction grating is, the red light in the incident light beam is diffracted and converged to a preset area by the diffraction grating, the red wavelength light is collected by the diffraction grating on the diffraction lens, the glasses can be used in a natural environment, there is no need to set up a light source such as laser or LED, the safety problem caused by the stability of the light source of various laser or LED devices is limitedly reduced, and the volume of the glasses is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1It is a structural schematic diagram of a diffractive lens according to an embodiment of the utility model;

[0022] Figure 2 A light path diagram of the red light diffraction glasses according to an embodiment of the utility model;

[0023] Figure 3 Another optical path diagram of the red light diffraction glasses according to an embodiment of the utility model;

[0024] Figure 4 This is a front view of the red light diffraction glasses according to an embodiment of the utility model;

[0025] Figure 5 A top view of the red light diffraction glasses according to an embodiment of the utility model;

[0026] Description of reference numerals:

[0027] 1-diffraction lens; 2-central light-transmitting area; 3-diffraction grating; 4-transparent part; 5-opaque part; 6-fixed frame; 7-incident light beam; 8-light in non-red light band; 9-red light; 10-glasses body; 11-collimating lens; 12-parallel light; 13-frame; 14-tip of the glasses. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the 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.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] At present, conventional light-feeding devices or other ophthalmic optotherapy products usually emit a light beam from a laser or LED light source, and use multiple optical devices to perform uniform light processing to obtain the required uniform light spot. However, due to the lack of certain stability and safety of the laser light source, and due to the existence of the light source, the overall space is large and inconvenient to use. For this reason, the embodiment of the utility model proposes a passive solution based on a diffraction grating 3 to collect red light in sunlight, achieve the effect of relieving visual fatigue, and thus have a certain effect on the auxiliary improvement of ophthalmic optometry.

[0033] The present invention provides a red light diffraction glasses, which are used to relieve visual fatigue and assist in improving eye vision. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, it includes a frame 13 and a fixing part, and the frame is fixed to the eye by the fixing part. A diffraction lens 1 is provided on the frame 13, and a diffraction grating 3 is engraved in the diffraction lens 1. The farther the diffraction grating 3 is from the center of the diffraction lens 1, the larger the period of the diffraction grating 3 is, and the diffraction grating 3 is used to diffract the red light 9 in the incident light beam 7 and converge it to a preset area.

[0034] In this embodiment, the fixing member is a temple 14 of conventional glasses, and the temple 14 is placed in front of the eyes of the human body to fix the frame 13. In other embodiments, the fixing member may also be a cable tie, Velcro, etc., and the frame 13 is fixed by the cable tie, Velcro, etc. The following mainly describes that the fixing member may be the temple 14 of conventional glasses.

[0035] Specifically, the incident light beam 7 in the embodiment of the present invention may be natural light such as sunlight, bioluminescence, or a light beam generated by an artificial light source such as an incandescent lamp.

[0036] In this embodiment, the diffraction lens 1 serves as the overall light-transmitting and carrier of the diffraction grating 3. The diffraction grating 3 mainly controls the collection of the red light 9 by the size of the period, and finally gathers all the red light 9 together, achieving a certain effect of alleviating visual fatigue and assisting in improving eye vision.

[0037] The shape of the diffractive lens 1 can be various, such as circular, elliptical or rectangular.

[0038] The portion of the diffraction lens 1 where the diffraction grating 3 is not etched is a transparent lens, and the lens material may be quartz glass or resin.

[0039] The diffraction grating 3 is obtained by etching on the diffraction lens 1, and the etched diffraction pattern can have a variety of options, such as a step shape and a sawtooth shape.

[0040] The diffraction grating 3 can be distributed at any position of the diffraction lens 1 .

[0041] The diffraction lens 1 has the function of diffracting and converging the red light 9 to a preset area by etching the diffraction grating 3. It is mainly used to collect the red light 9 in natural light and play a certain focusing role, and filter out light in other bands, such as reflecting or diffracting light 8 in other non-red light bands to an area farther away from the preset area.

[0042] It should be understood that in the embodiment of the utility model, the frame 13 is placed in front of the human eye through the temples 14, and the preset area is an area close to the human eye relative to the diffractive lens 1, and is located between the glasses and the diffractive lens 1. Preferably, the projection of the center of the preset area on the diffractive lens 1 coincides with the center of the diffractive lens 1, that is, the preset area is located in the central area of ​​the diffractive lens 1.

[0043] In the embodiment of the utility model, when the incident light beam 7 is sunlight, the diffraction grating 3 in the diffraction lens 1 diffracts the red light 9 in the incident light beam 7 and converges it to a preset area, and the red light 9 enters the eye through the preset area. Therefore, when the incident light beam 7 is irradiated on the diffraction lens 1, the diffraction grating 3 in each area can diffract the red light 9 and converge it to the central area, thereby enhancing the red light 9 entering the eye, and a higher power red light 9 can be obtained without setting a laser or LED light source, thereby improving the treatment effect.

[0044] A red light diffraction glasses according to an embodiment of the utility model is provided with a diffraction lens 1 on a frame 13, and a diffraction grating 3 is engraved inside the diffraction lens 1. The farther the diffraction grating 3 is from the center of the diffraction lens 1, the larger the period of the diffraction grating 3 is. The red light 9 in the incident light beam 7 is diffracted and converged to a preset area by the diffraction grating 3. The red wavelength light is collected by the diffraction grating 3 on the diffraction lens 1. The glasses can be used in a natural environment without setting a light source such as a laser or LED, which reduces the safety problems caused by the stability of the light sources of various laser or LED devices to a limited extent. The glasses have a simple structure and a small number of optical components, which effectively reduces the volume of the glasses and is easy to wear.

[0045] In an optional embodiment, the diffraction lens 1 includes a central light-transmitting area 2 and a diffraction area arranged around the central light-transmitting area 2, the diffraction area is provided with a plurality of layers, and the diffraction grating 3 is arranged in each layer of the diffraction area.

[0046] Specifically, the central light-transmitting area 2 is located at the center of the diffractive lens 1 and is made of a light-transmitting quartz glass material. It is preferably a circular area, but it can also be a rectangular, elliptical area.

[0047] There is no limit to the number of layers in the diffraction region, and it can be set according to actual needs, for example, it can be 2 layers, 3 layers, 4 layers, etc.

[0048] The diffraction region can be of any shape, such as circular, square, etc. The size of the diffraction region is also arbitrary and can be set as required. The number of diffraction gratings 3 included in each layer of diffraction region can be determined according to the area size of each layer of diffraction region and the size of the diffraction grating 3.

[0049] In an optional embodiment, the diffraction grating 3 includes a transparent portion 4 and an opaque portion 5 that are spaced apart. The widths of the transparent portion 4 and the opaque portion 5 meet the following requirements:

[0050] (a+b)sinθ=kλ

[0051] Wherein, a is the width of the transparent part 4, b is the width of the opaque part 5, θ represents the angle between the light beam and the normal after passing through the diffraction grating 3, k is the diffraction order, and λ is the central wavelength of the red light 9.

[0052] Specifically, the central wavelength λ of the red light 9 diffracted and focused to the preset area by the diffraction grating 3 is within the range of 620nm-750nm, and the diffraction order is ±1st order.

[0053] Preferably, the central wavelength λ of the red light 9 is 650nm, and may also include light in the wavelength range of 620nm to 750nm. In the related art, a filter device is used to obtain red light with a wavelength in the wavelength range of 620nm to 750nm to obtain the auxiliary treatment effect and fatigue improvement function of red light. However, the applicant has found that the red light 9 with a central wavelength of 650nm is stronger than red light of other wavelengths in relieving visual fatigue and auxiliary treatment of eye vision. Therefore, the embodiment of the utility model can improve the fatigue relief and auxiliary treatment effects by diffracting and converging the red light 9 in the 650nm region.

[0054] In a specific embodiment, the diffraction lens 1 used is a circular glass lens, and there are two layers of square diffraction regions outside the central light-transmitting region 2. The diffraction regions are annular regions concentrically arranged with the central light-transmitting region 2, and the period of the diffraction gratings 3 in each layer of the diffraction region is the same. The number of diffraction gratings 3 in the two layers of the diffraction region is 8 and 16 respectively.

[0055] Assume that the red light diffraction glasses are worn on the eyes, and the distance between the retina and the eyes is 5 cm, the distance between the first diffraction area and the center is 1 cm, and the distance between the second diffraction area and the center is 2 cm

[0056] Since the diffraction region is an annular region concentrically arranged with the central light-transmitting region 2, the distance between the diffraction grating 3 in each layer of the diffraction region and the center of the lens is equal, so the period of the diffraction grating 3 in each layer is the same.

[0057] The period of the first diffraction grating 3 is set to d1, wherein the width of the transparent part 4 is a1, and the width of the opaque part 5 is b1. The period of the second diffraction grating 3 is set to d2, wherein the width of the transparent part 4 is a2, and the width of the opaque part 5 is b2.

[0058] According to the formula of the diffraction grating 3, dsinθ=(a+b)sinθ=kλ, wherein a is the width of the transparent portion 4, b is the width of the opaque portion 5, θ represents the angle between the light beam and the normal after passing through the diffraction grating 3, k is the diffraction order, λ is the central wavelength of the red light 9, and in this embodiment, ±1 order is used, i.e., the secondary is large, and the wavelength of the red light 9 is selected to be 650nm.

[0059] It can be calculated from the above formula that the period d1 of the inner layer is 3.3 μm and the period d2 of the outer layer is 1.8 μm.

[0060] When the red light diffraction glasses of this embodiment are placed in a natural light or artificial light environment, the red light can be effectively collected into a preset area, and light of other wavelengths can be ensured to deviate from the preset area, so that the red light wavelength portion of the secondary light of the diffraction grating 3 in each area can be collected.

[0061] In the embodiment of the utility model, different diffraction regions are divided around the diffraction lens 1 to depict the diffraction grating 3 , and the period in each diffraction region is consistent, which effectively reduces the difficulty of depicting the diffraction grating 3 .

[0062] Furthermore, the diffraction gratings 3 in the surrounding areas are used to collect light of red wavelengths. The red light diffraction glasses can be used in natural environments, which reduces the safety issues caused by the stability of light sources of various laser or LED devices to a limited extent.

[0063] In an alternative embodiment, if Figure 3 As shown, the eyeglass body 10 of the red light diffraction eyeglasses also includes a collimating lens 11. The area of ​​the collimating lens 11 is smaller than that of the diffraction lens 1. The collimating lens 11 is arranged behind the diffraction lens 1. The collimating lens 11 is used to collimate the diffracted and converged red light 9 to form parallel light 12.

[0064] Specifically, the "front" and "rear" in the embodiment of the utility model are relative to the light path entering the human eye, the side close to the human eye is "rear", and the opposite is "front". The collimating lens 11 is a lens or collimator with divergence function, located between the diffraction lens 1 and the glasses, and is mainly used to parallelize the collected red light 9 to avoid focusing of the light spot.

[0065] Furthermore, the collimating lens 11 is a concave lens.

[0066] Specifically, the concave lens used can be a lens with divergence function such as a double concave lens, a plano-concave lens, etc. After the incident light beam 7 passes through the diffraction lens 1, the diffraction gratings 3 in each area of ​​the diffraction lens 1 will gather the secondary large red light 9 wavelength at the center, and a concave lens is added at this position to obtain parallel light 12, and the human eye receives the parallel light 12.

[0067] In an optional embodiment, the diameter of the diffraction lens 1 is 3 cm to 6 cm, and the diameter of the collimating lens 11 is 5 mm to 3 cm.

[0068] Since the diameter of the diffractive lens 1 is 4 cm to 6 cm, the period of the diffraction grating 3 in the entire area of ​​the diffractive lens 1 can range from 1 nm to 1 mm.

[0069] Exemplarily, the diameter of the diffraction lens 1 is 5 cm, and the diameter of the collimating lens 11 is 0.75 cm.

[0070] Alternatively, the diameter of the diffraction lens 1 is 4 cm, and the diameter of the collimating lens 11 is 5 mm.

[0071] Alternatively, the diameter of the diffraction lens 1 is 6 cm, and the diameter of the collimating lens 11 is 1 cm.

[0072] Since the diameter of the diffraction lens 1 is larger than that of the collimation lens 11, the diffraction lens 1 plus the collimation lens 11 can be used to collect the light within the size range of the diffraction lens 1 (about 5 cm) to the plane of the collimation lens 11 (select 5 mm-3 cm) and parallelize it. In this way, under the same incident conditions, the power of the collected red light will be greatly improved, which will greatly improve the effects of auxiliary treatment of eye vision or relief of visual fatigue.

[0073] In an optional embodiment, the red light diffraction glasses further include a fixing frame 6 , the fixing parts are temples 14 , one end of the fixing frame 6 is connected to the frame 13 or the temples 14 , and the other end of the fixing frame 6 is connected to the collimating lens 11 .

[0074] Specifically, since the area of ​​the collimating lens 11 is smaller than the diffractive lens 1, the fixing frame 6 needs to be tilted. By setting the fixing frame 6, the collimating lens 11 can be fixed between the frame 13 and the temples 14, thereby improving the stability of the red light diffractive glasses.

[0075] The utility model embodiment has the following effects:

[0076] (1) The diffraction grating 3 on the diffraction lens 1 collects light of red wavelength, and can be used in a natural environment without the need to set up light sources such as lasers or LEDs, effectively reducing the safety issues caused by the stability of light sources of various laser or LED devices. The structure is simple, the number of optical components required is small, and the volume of the glasses is effectively reduced, making them easy to wear.

[0077] (2) The collected red light is parallelized by the collimating lens 11 and then incident, so that the light is parallel light and the focusing of the light spot is avoided.

[0078] (3) Different diffraction regions are divided around the diffraction lens 1 to characterize the diffraction grating 3, and the period in each diffraction region is consistent, which effectively reduces the difficulty of characterizing the diffraction grating 3.

[0079] Although the embodiments of the present invention are described above in conjunction with the drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall all fall within the scope defined by the appended claims.

Claims

1. A red light diffraction glasses, used to relieve visual fatigue and assist in improving eye vision, comprising a frame and a fixing member, wherein the frame is fixed to the eye by the fixing member, and characterized in that: The frame is provided with a diffraction lens, in which a diffraction grating is engraved. The farther the diffraction grating is from the center of the diffraction lens, the larger the period of the diffraction grating. The diffraction grating is used to diffract the red light in the incident light beam and converge it to a preset area.

2. The red light diffraction glasses according to claim 1, characterized in that: The diffraction lens comprises a central light-transmitting area and a diffraction area arranged around the central light-transmitting area. The diffraction area is provided with a plurality of layers, and the diffraction grating is arranged in each layer of the diffraction area.

3. The red light diffraction glasses according to claim 1, characterized in that: The diffraction grating includes a transparent portion and an opaque portion which are arranged at intervals.

4. The red light diffraction glasses according to claim 3, characterized in that: The widths of the transparent part and the opaque part meet the following requirements: (a+b)sinθ=kλ Wherein, a is the width of the transparent part, b is the width of the opaque part, θ represents the angle between the light beam and the normal after passing through the diffraction grating, k is the diffraction order, and λ is the central wavelength of the red light.

5. The red light diffraction glasses according to claim 4, characterized in that: The central wavelength of the red light diffracted by the diffraction grating and focused to the preset area is within the range of 620nm-750nm, and the diffraction order is ±1.

6. The red light diffraction glasses according to claim 2, characterized in that: The diffraction region is an annular region concentrically arranged with the central light-transmitting region, and the period of the diffraction grating in each layer of the diffraction region is the same.

7. The red light diffraction glasses according to claim 1, characterized in that: It also includes a collimating lens, the area of ​​which is smaller than that of the diffraction lens, and the collimating lens is arranged behind the diffraction lens. The collimating lens is used to collimate the diffracted and converged red light to form parallel light.

8. The red light diffraction glasses according to claim 7, characterized in that: The collimating lens is a concave lens.

9. The red light diffraction glasses according to claim 7, characterized in that: It also includes a fixing frame, wherein the fixing member is a temple, one end of the fixing frame is connected to the mirror frame or the temple, and the other end of the fixing frame is connected to the collimating lens.

10. The red light diffraction glasses according to claim 7, characterized in that: The diameter of the diffraction lens is 3 cm to 6 cm, and the diameter of the collimating lens is 5 mm to 3 cm.

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