Light path system and light feeding equipment
By designing an optical path system in a macular, the red light is deflected by using the first and second diffraction optical elements to avoid light from irradiating the macular area, the problem of macular lesions in the prior art is solved and the protection of macular spots is achieved.
Patent Information
- Application Number
- CN202422172379.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-05
AI Technical Summary
When existing masturbators undergo red light treatment, light can easily illuminate the macular area of the user's fundus, and long-term use may lead to macular lesions.
An optical path system is designed, including the first and second diffraction optical elements, by deflecting the red light in a direction, so that it avoids the user's pupil projection area, ensuring that the light does not directly illuminate the macular area.
It effectively avoids direct exposure of light to the macular area, prevents the occurrence of macular lesions, and protects the health of the fundus.
Smart Images
Figure CN223183924U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optics, and more particularly to an optical path system and a light feeding device. Background Art
[0002] Axial length growth is a major contributing factor to myopia, especially in adolescents experiencing rapid growth. Studies have shown that repeated exposure to low-intensity red light can increase choroidal blood flow, thereby increasing choroidal thickness, blood circulation, and blood supply. This can help alleviate the relative oxygen deficiency in the fundus of myopic eyes, inhibiting the rapid growth of the eye's axial length, and thus controlling the progression of myopia.
[0003] A light therapy device can effectively prevent and control myopia in adolescents and children. Its main function is to use red light of appropriate intensity to illuminate the retina. This can effectively supplement the lack of healthy light exposure in adolescents and children in a short period of time, improve choroidal blood supply, allow the sclera to receive more nutrients and oxygen, and secrete more dopamine. This substance will act on the eyeball, and the eyeball will gradually return to normal. Existing light therapy devices use a light source to emit light to illuminate the entire eyeball to achieve treatment. Because the macula at the bottom of the eyeball is sensitive to light, long-term use of myopia treatment devices may damage the macula and cause macular degeneration. Utility Model Content
[0004] In response to the problems existing in the prior art, the purpose of the present invention is to provide an optical path system that can prevent light from irradiating the user's fundus macular area to a great extent, avoid damage to the macula during long-term use of light-feeding equipment for red light treatment, and effectively prevent macular degeneration.
[0005] In order to solve the above problems, the present invention provides an optical path system, comprising:
[0006] a light source, configured to output red light;
[0007] A light-feeding element is provided on the output light path of the light source and is used to receive the red light;
[0008] The diffractive optical element includes a first diffractive optical element and a second diffractive optical element arranged around the first diffractive optical element;
[0009] The second diffractive optical element is used to deflect the direction of the red light so that the red light is projected to the user's pupil, and the first diffractive optical element is used to deflect the direction of the red light so that the red light is projected away from the user's pupil.
[0010] In an optional embodiment of the present application, the light spot projected onto the user's pupil through the second diffractive optical element and entering the fundus deviates from the macular area.
[0011] In an optional embodiment of the present application, the second diffractive optical element has positive optical power.
[0012] In an optional embodiment of the present application, a light-guiding element is further included, and the red light emitted by the light source is transmitted to the light-emitting element through the light-guiding element; the light-guiding element includes at least one of an optical waveguide, a semi-transparent and semi-reflective mirror, a prism, and a diffraction grating.
[0013] In an optional embodiment of the present application, the light-guiding element includes an optical waveguide, and the light-feeding element is arranged in the outcoupling region of the optical waveguide; the coupling region of the optical waveguide is provided with a coupling grating; or, the coupling region of the optical waveguide is provided with a bevel end; or, the coupling region of the optical waveguide is provided with a prism.
[0014] In an optional embodiment of the present application, a light shaping element is further included. The light shaping element is arranged on the light output side of the light source, so that the red light emitted by the light source is incident on the optical waveguide as parallel light after the divergence angle is adjusted by the light shaping element.
[0015] In an optional embodiment of the present application, the red light source includes sunlight, laser or LED.
[0016] In an optional embodiment of the present application, the red light emitted by the light source has a wavelength of 630-680 nm.
[0017] In an optional embodiment of the present application, the first diffractive optical element is replaced by a reflective film or a light absorbing film.
[0018] The present application further provides a light-feeding device, comprising the optical path system as described above.
[0019] The optical path system provided in the present application includes a light source for outputting red light; a diffraction element provided on the output optical path of the light source for receiving the red light; the diffraction element includes a first diffraction optical element and a second diffraction optical element provided around the first diffraction optical element; wherein the second diffraction optical element is used to deflect the direction of the red light so that the red light is projected toward the user's pupil, and the first diffraction optical element is used to deflect the direction of the red light so that the red light is projected away from the user's pupil. The optical path system of the present application can avoid light irradiating the user's fundus macular area to a great extent, avoid damage to the macula during long-term use of diffraction equipment for red light therapy, and effectively prevent macular degeneration. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 One of the schematic diagrams of the optical path system provided in an embodiment of the present application;
[0022] Figure 2 A schematic diagram of the optical path of the optical system provided in an embodiment of the present application when imaging in the human eye;
[0023] Figure 3 The second schematic diagram of the optical path system provided in an embodiment of the present application;
[0024] Figure 4 The third schematic diagram of the optical path system provided in the embodiment of the present application;
[0025] Figure 5 This is the fourth schematic diagram of the optical path system provided in an embodiment of the present application.
[0026] Description of the numbers in the figure:
[0027] 1. Light source; 2. Second diffractive optical element; 3. First diffractive optical element; 4. Optical waveguide. DETAILED DESCRIPTION
[0028] With the widespread use of large-screen electronic devices, myopia among adolescents has become increasingly serious. To effectively control the onset of myopia and slow its progression, the use of low-intensity red light to illuminate the fundus is currently being proposed. Specifically, low-intensity red light devices for fundus illumination accurately simulate the beneficial rays of sunlight by illuminating the retina with low-energy red light. This illumination improves fundus blood circulation, promotes dopamine secretion by retinal pigment epithelial cells, restores the thinned choroid to normal, and supplies sufficient oxygen to the sclera, thereby strengthening the sclera. Ultimately, red light illumination can inhibit abnormal axial length growth, thereby effectively preventing, controlling, and correcting myopia. Because most current red light treatments irradiate the entire eyeball, and the macula at the base of the eyeball is sensitive to light, long-term red light therapy can easily damage the macula, leading to macular degeneration.
[0029] To this end, the present application provides an optical path system that can prevent light from irradiating the user's fundus macular area to the greatest extent, avoid damage to the macula during long-term use of light-feeding equipment for red light therapy, and effectively prevent macular degeneration.
[0030] To help those skilled in the art better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the embodiments described are only a portion of the present invention, not all of the embodiments. All other embodiments derived by those skilled in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.
[0031] In a specific embodiment of the present application, the optical path system includes a light source 1 for outputting red light; a diffraction element is arranged on the output optical path of the light source 1 for receiving red light; the diffraction element includes a first diffraction optical element 3 and a second diffraction optical element 2 arranged around the first diffraction optical element 3; wherein the second diffraction optical element 2 is used to deflect the direction of the red light so that the red light is projected to the user's pupil, and the first diffraction optical element 3 is used to deflect the direction of the red light so that the red light is projected away from the user's pupil.
[0032] like Figure 1 As shown, part of the red light emitted by the light source 1 is diffracted by the second diffractive optical element 2 and then enters the user's pupil, forming a red light spot on the user's retina. The other part is projected to an area away from the user's pupil through the first diffractive optical element 3. Figure 1 The example shows that the first diffractive optical element 3 diffracts red light away from the human eye, that is, diffracts it into the external environment. Of course, the first diffractive optical element 3 can also diffract red light toward the side closer to the human eye, but avoid the pupil area. It should be noted that the first diffractive optical element 3 is used to block light from reaching the macula of the user's fundus, protecting the light-sensitive macula from direct exposure, effectively preventing damage to the macula during long-term red light therapy.
[0033] In this embodiment, the shapes of the first diffractive optical element 3 and the second diffractive optical element 2 are not specifically limited, and those skilled in the art may select them according to actual needs. For example, the first diffractive optical element 3 is circular in shape, and because the second diffractive optical element 2 is disposed around the first diffractive optical element 3, the second diffractive optical element 2 is annular in shape. Alternatively, the second diffractive optical element 2 is circular in shape, with a circular area hollowed out at its center for the first diffractive optical element 3 to be placed.
[0034] like Figure 2As shown, in an optional embodiment of the present application, the light spot projected onto the user's pupil by the second diffractive optical element 2 and entering the fundus deviates from the macula. The red light emitted by light source 1 is diffracted by the second diffractive optical element 2 into light rays ab and cd. After entering the pupil, these light rays form light spots on the AB and CD arcs, respectively, on the user's fundus. No light spot is formed on the BC arc, where the macula is located. This prevents macula damage from irradiation.
[0035] It can be understood that the light emitted by the light source 1 is usually divergent light or parallel light. In order to make the diffracted light emitted by the light source 1 converge on the user's pupil after being diffracted by the second diffractive optical element 2, so that the red light does not directly illuminate the macular area, therefore, in an optional embodiment of the present application, the second diffractive optical element 2 has a positive optical focal length.
[0036] In an optional embodiment of the present application, a light guide element is further included, through which the red light emitted by the light source is transmitted to the light-emitting element; the light guide element includes at least one of an optical waveguide 4, a semi-transparent mirror, a prism, and a diffraction grating. The provision of the light guide element allows for greater design freedom for the entire optical system, and when the optical system is used in a light-emitting device, the size of the device can be effectively reduced.
[0037] like Figure 3-4 As shown, in an optional embodiment of the present application, the light-guiding element includes an optical waveguide 4, and the light-guiding element is arranged in the outcoupling area of the optical waveguide; the coupling-in area of the optical waveguide 4 is provided with a coupling-in grating; or, the coupling-in area of the optical waveguide 4 is provided with a bevel end; or, the coupling-in area of the optical waveguide is provided with a prism. After the red light emitted by the light source 1 enters the optical waveguide 4 through the coupling-in grating, it is transmitted to the first diffraction optical element 3 and the second diffraction optical element 2 in the optical waveguide in the form of total reflection. The second diffraction optical element 2 diffracts the red light to the user's pupil, and the first diffraction optical element 3 diffracts the red light to an area deviating from the user's pupil. It should be noted that Figure 3-4 Although the diffraction of the red light by the first diffractive optical element 3 is not shown in the figure, those skilled in the art can deduce the diffraction mode of the red light by the first diffractive optical element 3 according to the above description of the first diffractive optical element 3, or directly refer to Figure 1 The diffraction pattern shown.
[0038] In an optional embodiment of the present application, a light shaping element is further included. The light shaping element is arranged on the light output side of the light source 1, so that the red light emitted by the light source 1 is incident on the optical waveguide 4 as parallel light after the divergence angle is adjusted by the light shaping element.
[0039] In an optional embodiment of the present application, the light source 1 includes sunlight, laser or LED. Of course, the red light source can also be other electronic devices that can generate coherent light sources. This is not specifically limited here, and those skilled in the art can choose according to actual needs.
[0040] In an optional embodiment of the present application, the wavelength of the red light emitted by the light source 1 is 630-680 nm, specifically, the wavelength of the red light can be 630 nm, 650 nm, 680 nm, preferably 650 nm.
[0041] In an optional embodiment of the present application, a reflective film or a light-absorbing film is used instead of the first diffractive optical element 3. When the second diffractive optical element 2 is a transmissive diffractive optical element, the first diffractive optical element 3 can be replaced by a reflective film, which reflects light irradiating the user's macula away from the eye, or the first diffractive optical element 3 can be replaced by a light-absorbing film. When the second diffractive optical element 2 is a reflective diffractive optical element, the first diffractive optical element 3 is preferably replaced by a light-absorbing film. When a reflective film is used instead of the first diffractive optical element 3, the angle at which light is incident on the reflective film must be strictly designed to prevent the reflective film from reflecting light toward the user's pupil.
[0042] The present application further provides a light feeding device, including the light path system as described above. Figure 5 As shown, the second diffractive optical element 2 and the first diffractive optical element 3 are bonded to each other on a light-transmitting substrate. In this case, the light-feeding device can be a glasses-type light-feeding device.
[0043] In summary, the optical path system in the present application can prevent light from irradiating the user's fundus macular area to a great extent, avoid damage to the macula during long-term use of light-feeding equipment for red light therapy, and effectively prevent macular degeneration.
[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements are inherent to the elements. In the absence of further restrictions, the elements limited by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. In addition, the above-mentioned technical solutions provided in the embodiments of the present application are not described in detail in accordance with the corresponding technical solutions in the prior art to achieve the same principle, so as to avoid excessive elaboration.
[0045] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims
1. An optical path system for a light feeding device, characterized in that: include: a light source, configured to output red light; A light-feeding element is provided on the output light path of the light source and is used to receive the red light; The diffractive optical element includes a first diffractive optical element and a second diffractive optical element arranged around the first diffractive optical element; The second diffractive optical element is used to deflect the direction of the red light so that the red light is projected to the user's pupil, and the first diffractive optical element is used to deflect the direction of the red light so that the red light is projected away from the user's pupil.
2. The optical path system according to claim 1, characterized in that: The light spot projected onto the user's pupil and into the fundus through the second diffractive optical element deviates from the macular area.
3. The optical path system according to claim 1, characterized in that: The second diffractive optical element has positive optical power.
4. The optical path system according to claim 1, characterized in that: It also includes a light guide element, through which the red light emitted by the light source is transmitted to the red light element; the light guide element includes at least one of an optical waveguide, a semi-transparent and semi-reflective mirror, a prism, and a diffraction grating.
5. The optical path system according to claim 4, characterized in that: The light-guiding element includes a light waveguide, and the light-feeding element is arranged in the outcoupling region of the light waveguide; the coupling region of the light waveguide is provided with a coupling grating; or, the coupling region of the light waveguide is provided with a bevel end; or, the coupling region of the light waveguide is provided with a prism.
6. The optical path system according to claim 5, characterized in that: It also includes a light shaping element, which is arranged on the light-emitting side of the light source, so that the red light emitted by the light source is incident on the optical waveguide as parallel light after the divergence angle is adjusted by the light shaping element.
7. The optical path system according to claim 1, characterized in that: The red light source includes sunlight, laser or LED.
8. The optical path system according to claim 7, characterized in that: The wavelength of the red light emitted by the light source is 630-680nm.
9. The optical path system according to claim 1, characterized in that: The first diffractive optical element is replaced by a light reflecting film or a light absorbing film.
10. A light feeding device, characterized in that: The optical system comprises the optical path system according to any one of claims 1 to 9.