CN-122006127-A - Light feeding device

Abstract

The light feeding device comprises a light source, an optical system and a diaphragm, wherein the light source is a light emitting light source, the optical system comprises a first lens and a second lens which are arranged at intervals, one side, close to the first lens, of the second lens is provided with the diaphragm, the first lens is used for receiving light emitted by the light source and generating parallel light, the diaphragm is used for attenuating or shielding a middle area of the parallel light, and the second lens is used for projecting regulated parallel light into a pupil of a user or a preset distance area in front of the pupil of the user.

Inventors

• WEI RUIHUA
• SU QIANG
• DU BEI
• LIU GUIHUA
• WANG JINGHUI
• HAN HAOCHEN
• Sun Xiaozu

Assignees

• 天津医科大学眼科医院

Dates

Publication Date

20260512

Application Date

20260120

Claims (10)

1. 1. A nursing device, comprising: A light source, wherein the light source is a luminous light source; The optical system comprises a first lens and a second lens which are arranged at intervals, wherein a diaphragm is arranged on one side, close to the first lens, of the second lens, the first lens is used for receiving light emitted by the light source and generating parallel light, the diaphragm is used for attenuating or shielding the middle area of the parallel light, and the second lens is used for projecting the regulated parallel light into a user pupil or a preset distance area in front of the user pupil.
2. 2. The light feeding device of claim 1, wherein said predetermined distance is less than or equal to 2 millimeters.
3. 3. The light feeding device of claim 1, wherein said first lens is an achromat.
4. 4. The nursing device of claim 1 wherein said second lens is a biconvex lens.
5. 5. The light feeding device of claim 1, wherein the diaphragm includes a light transmissive region and a light attenuating region, the light attenuating region being located in a middle region of the diaphragm.
6. 6. The light feeding device of claim 5, wherein said light attenuating area is of oval or circular configuration.
7. 7. The light feeding apparatus of claim 1, wherein said light source is formed by a mixture of a plurality of light sources emitting different colors of light.
8. 8. The light feeding device of claim 7, wherein said different colors of light include red, blue and green light.
9. 9. The light feeding device of claim 1, wherein the light source emits light having a luminous intensity greater than or equal to 0.1mW.
10. 10. The light feeding device of claim 1, wherein the light source emits light in the visible or infrared wavelength band.

Description

Light feeding device Technical Field Embodiments of the present disclosure relate to, but are not limited to, the field of optical technology, and more particularly to a nursing device. Background In recent years, the myopia population of China is remarkably increased, and the teenager population is particularly problematic. Research proves that the increased natural illumination in outdoor activities is the only myopia prevention and control means with safety and effectiveness at present, but is limited by academic pressure and life style, and the common natural light exposure of teenagers is insufficient. For this reason, artificial light sources "nursing therapies" have been developed. There are many kinds of light-feeding devices on the market, and in general, the light-feeding effect of the light-feeding device is positively related to the light power, but high-power laser light directly irradiates the macula fovea to increase the risk of retinal photodamage. How to improve the optical output power to realize better prevention and control effects, reduce the local photo-thermal and photochemical load of retina, and realize real 'high-power safe light feeding' is a core bottleneck restricting the clinical transformation and long-term application of the technology. Disclosure of Invention The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. Embodiments of the present disclosure provide a light feeding device comprising: A light source, wherein the light source is a luminous light source; The optical system comprises a first lens and a second lens which are arranged at intervals, wherein a diaphragm is arranged on one side, close to the first lens, of the second lens, the first lens is used for receiving light emitted by the light source and generating parallel light, the diaphragm is used for attenuating or shielding the middle area of the parallel light, and the second lens is used for projecting the regulated parallel light into a user pupil or a preset distance area in front of the user pupil. The light feeding device receives light emitted by a divergent light source through the first lens and generates parallel light, the diaphragm attenuates or shields light in the middle area of the parallel light, the second lens projects the regulated parallel light to the pupil of a user or a preset distance area in front of the pupil of the user, imaging hot spots are eliminated, energy uniformity of an irradiation area is improved, the light spot position is ensured to be stable under the condition of ametropia and lens adjustment, in addition, the light intensity of the light spot center is lower or no strong area, the light spot center is positioned in a central concave with dense cells, the light energy is accurately delivered to peripheral retina, the myopia prevention and control biological effect can be effectively triggered by stimulating the peripheral retina, the key central vision function area is thoroughly avoided, and the fundamental breakthrough of safety is realized from the optical structure source. Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. Other advantages of the present disclosure may be realized and attained by the structure particularly pointed out in the written description and drawings. Drawings The accompanying drawings are included to provide an understanding of the technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure. Fig. 1 is a schematic diagram of a nursing device according to an exemplary embodiment of the present disclosure. Fig. 2 is a schematic illustration of an aperture in accordance with an exemplary embodiment of the present disclosure. Fig. 3 shows the structure of the macula area and photoreceptor cell distribution. FIG. 4 is a schematic representation of the Gultstrand-LeGrand eye model imported using Zemax software. Fig. 5 is a lattice diagram of RGB tri-basic light projected on the retina according to an exemplary embodiment of the present disclosure. Fig. 6 is a projected lattice diagram of an annular light source on the retina with refractive error-4D- +4d defocus. Fig. 7 is a schematic diagram of the results of optical performance verification and security assessment using Zemax software to simulate the incidence of a beam from different pupil positions. FIG. 8 is a graph of the light response function of three cone cells (S-type, M-type, L-type) and rod cells of the human eye. Fig. 9 is a graph showing the eye axis growth inhibition effect of 655 nm lasers at different powers. Fig. 10 is a