Facial recognition system

Abstract

This disclosure discloses a light spot reshaping device for improving vision. The device includes: a plurality of first light-blocking plates, second light-blocking plates, and a first light-blocking plate switching wheel; wherein, the first light-blocking plates are circular and include: a circular light-blocking area and an annular light-transmitting area, the annular light-transmitting area being embedded outside the circular light-blocking area; the plurality of first light-blocking plates are circumferentially arranged on the first light-blocking plate switching wheel; the second light-blocking plates are disposed in the light spot reshaping optical path and are positioned in the light-transmitting direction of the annular light-transmitting area, enabling the second light-blocking plates to block part of the light in the annular light-transmitting area, forming a C-shaped light spot for irradiating the fundus. The light spot reshaping device of this disclosure embodiment can form a C-shaped light spot, thereby avoiding the fovea and macular bundle fibers, achieving safe and effective light spot irradiation. Furthermore, by rotating the first light-blocking plate switching wheel, personalized vision improvement plans can be implemented.

Description

Technical Field

[0001] This disclosure generally relates to the field of optical technology. More specifically, this disclosure relates to a light spot reshaping device for improving vision. Background Technology

[0002] Myopia has become a major public health problem worldwide, profoundly impacting individual health, family life, and social development. The development of myopia is influenced by both genetic and environmental factors. Genetic factors primarily involve the regulation of eye development by genes; for example, specific genes may affect axial length, scleral structure, and retinal function, making individuals more susceptible to myopia during physiological development. Environmental factors are closely related to lifestyle and eye-use habits. Prolonged close-range eye use increases the burden on the eye's accommodation, thus stimulating axial elongation; while reduced outdoor activity time may decrease the opportunity for dopamine release from the retina, further accelerating myopia progression. Studies have shown that irradiating the retina with light of specific wavelengths can effectively inhibit axial length growth, having a positive impact on myopia prevention and control.

[0003] Some existing eye illumination devices use red light sources to generate illumination, and may also employ optical components such as diffusers to adjust the direction and power of the illumination light. When the human eye looks directly at the light source or observes an image of the light source after it has been processed by a lens, the eye adjusts the fovea of ​​the macula to face the light source / image itself, and sees a bright spot in the center. This causes the light source energy to concentrate in the fovea, the most photosensitive area. This increased visual stimulation may not only cause eye discomfort but may also increase the risk of damage to the fovea.

[0004] In addition, within the structure of the human fundus, there are conductive nerves—macroscopic fasciculi—located around the fovea. These fasciculi are composed of nerve fibers originating from the ganglion cells of the fovea, originating in the macula and entering the temporal side of the optic disc in a straight line. Any excessive stimulation of the fovea and conductive nerves may impair central vision; therefore, existing ocular lighting devices may increase the risk of damage to the macroscopic fasciculi.

[0005] In view of this, there is an urgent need to provide a light spot shaping device for improving vision, so as to provide more precise and safe light irradiation to the fundus structure and avoid unnecessary stimulation to the core area of ​​vision. Utility Model Content

[0006] In order to at least address one or more of the technical problems mentioned above, this disclosure proposes a spot reshaping device for improving vision in several aspects.

[0007] In a first aspect, this disclosure provides a light spot shaping device for improving vision, comprising: a plurality of first light-blocking plates, a second light-blocking plate, and a first light-blocking plate switching wheel; wherein, the first light-blocking plate is circular and includes: a circular light-blocking area and an annular light-transmitting area, the annular light-transmitting area being embedded in the circular light-blocking area; the plurality of first light-blocking plates are circumferentially arranged on the first light-blocking plate switching wheel, such that by rotating the first light-blocking plate switching wheel, any one of the plurality of first light-blocking plates can be inserted into the light spot shaping optical path; the second light-blocking plate is disposed in the light spot shaping optical path and is disposed in the light transmission direction of the annular light-transmitting area, such that the second light-blocking plate can block part of the light in the annular light-transmitting area, and the light forms a C-shaped light spot after passing through the first light-blocking plate and the second light-blocking plate for irradiating the fundus.

[0008] In some embodiments, the diameter of the circular light-blocking area ranges from [0.15 / k1, 2.5 / k1] mm, the inner diameter of the annular light-transmitting area is the same as the diameter of the circular light-blocking area, and the outer diameter of the annular light-transmitting area ranges from [2.5 / k1, 6 / k1] mm, where k1 represents the magnification factor when the light spot shaping device projects.

[0009] In some embodiments, the first light-shielding sheet further includes an annular light-shielding region, which is embedded in the annular light-transmitting region, and the inner diameter of the annular light-shielding region is the same as the outer diameter of the annular light-transmitting region.

[0010] In some embodiments, the second light-shielding sheet is rectangular, fan-shaped, or trapezoidal.

[0011] In some embodiments, for a fan-shaped second light-shielding sheet, the central angle of the fan is in the range of (15°, 45°); for a trapezoidal second light-shielding sheet, the included angle between the two sides of the trapezoid is in the range of [15°, 45°]; for a rectangular second light-shielding sheet, the central angle of the overlapping portion of the second light-shielding sheet with the annular light-transmitting area in the light-transmitting direction is in the range of [15°, 45°].

[0012] In some embodiments, the light spot shaping device further includes: a second light-shielding sheet holder, the second light-shielding sheet holder being disposed in the light transmission direction of the annular light-transmitting region, and the second light-shielding sheet being detachably fixed to the second light-shielding sheet holder.

[0013] In some embodiments, the second light-shielding plate holder is a groove, allowing the second light-shielding plate inserted into the light spot shaping optical path to be replaced by plugging and unplugging.

[0014] In some embodiments, the second light-shielding sheet includes a plurality of sub-light-shielding sheets connected by hinges, such that the area of ​​the second light-shielding sheet is adjustable.

[0015] In some embodiments, the spot reshaping device further includes: a controller and a fundus imaging device; wherein the fundus imaging device is connected to the controller and is used to acquire fundus retinal images and transmit them to the controller; the controller is also connected to a first light-shielding plate switching wheel and is used to control the first light-shielding plate switching wheel to rotate so as to insert a matching first light-shielding plate into the spot reshaping optical path according to the fundus retinal images.

[0016] In some embodiments, the light spot shaping device further includes: a light source emitter and a projection lens arranged along the optical axis; wherein, in the light spot shaping device, the center of the first light shield inserted into the light spot shaping optical path coincides with the optical axis, the light source emitter is used to provide illumination light, the first light shield and the second light shield are used to shape the illumination light into a C-shaped light spot, and the projection lens is used to project the C-shaped light spot onto the fundus.

[0017] The light spot reshaping device for improving vision, as described above, in this embodiment, uses a circular light-blocking area on a first light-blocking plate to block light rays illuminating the center of the fundus, and a second light-blocking plate to block part of the light rays from the annular light-transmitting area on the first light-blocking plate, thereby forming a C-shaped light spot. When this C-shaped light spot illuminates the fundus, it cleverly avoids the crucial fovea centralis and macular ganglion fibers emanating from the macular ganglion cells, thus protecting the vital visual structures of the fundus while influencing ocular tissue cell metabolism and promoting scleral collagen synthesis through light irradiation, thereby achieving a safe and effective vision improvement solution. Furthermore, the light spot reshaping device places several first light-blocking plates on a first light-blocking plate switching wheel, allowing any one of the first light-blocking plates to be inserted into the light spot reshaping optical path by rotating the wheel, thereby achieving flexible adjustment of the C-shaped light spot size for personalized vision improvement solutions. Attached Figure Description

[0018] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0019] Figure 1 A schematic diagram of the structure of an existing eye illumination device is shown;

[0020] Figure 2 A schematic diagram of the light spot formed by existing eye illumination devices is shown;

[0021] Figure 3 An exemplary structural diagram of a light spot reshaping device for improving vision, according to some embodiments of this disclosure, is shown.

[0022] Figure 4 An exemplary structural diagram of a first light-shielding switching wheel with a first light-shielding plate arranged according to some embodiments of this disclosure is shown;

[0023] Figure 5 A schematic diagram of the fundus structure of the human eye is shown;

[0024] Figure 6(a) shows a schematic diagram of the light blocking process of a rectangular second light-shielding sheet according to some embodiments of this disclosure;

[0025] Figure 6(b) shows a schematic diagram of the light blocking process of a fan-shaped second light shield according to some embodiments of this disclosure;

[0026] Figure 6(c) shows a schematic diagram of the light blocking process of a trapezoidal second light-shielding sheet according to some embodiments of this disclosure;

[0027] Figure 7 An exemplary structural diagram of a first light-shielding sheet according to some embodiments of this disclosure is shown;

[0028] Figure 8 An exemplary structural diagram of a spot shaping device according to some embodiments of this disclosure is shown. Detailed Implementation

[0029] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0030] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0032] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0033] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0034] Exemplary application scenarios

[0035] Myopia has become a major public health problem worldwide, with profound impacts on individual health, family life, and social development.

[0036] To prevent vision problems from worsening, some existing eye illumination devices use red light sources to create illumination for vision correction. These devices typically employ a binocular structure, with each binocular corresponding to one eye. A mechanical mechanism allows adjustment of the distance between the binoculars to fit the individual eye, ensuring that the red light images seen by both eyes overlap. Figure 1 A schematic diagram of an existing eye illumination device is shown, illustrating the basic optical path structure of a monocular light source. Figure 1 As shown, light emitted from the light source passes through a light-transmitting element and enters the human eye, illuminating the retina. This light-transmitting element can be an optical component used to adjust the direction or power of the light, such as a light diffuser. When the human eye looks directly at the light source or observes the image of the light source after it has been transformed by a lens, the eye adjusts the fovea of ​​the macula to face the light source / image itself, and sees a circular spot with higher central brightness. Figure 2 A schematic diagram of the light spot formed by existing eye illumination devices is shown, such as Figure 2 As shown, in the energy cross-sectional distribution of the light spot formed by existing ocular illumination devices, the energy is concentrated in the fovea centralis of the macula, which is the most photosensitive area. This increased visual stimulation may not only cause eye discomfort but may also increase the risk of damage to the fovea centralis.

[0037] In addition, according to Figure 2 The light spot and its energy cross-section distribution shown indicate that the macular bundle fibers, which are conductive nerves around the fovea, are also exposed to strong light, thus overstimulating the conductive nerves around the fovea and impairing central vision.

[0038] Exemplary application scheme

[0039] In view of this, the present disclosure provides a light spot shaping device for improving vision. It shapes the light spot by using a first light-shielding plate and a second light-shielding plate to form a C-shaped light spot that avoids the fovea of ​​the macula and the macular bundle fibers, thereby achieving a safe and effective vision improvement solution. Furthermore, the design of the first light-shielding plate switching wheel enables flexible switching of the first light-shielding plate to adapt to the vision improvement needs of different users.

[0040] Figure 3 Exemplary structural diagrams of a light spot reshaping device for improving vision, as shown in some embodiments of this disclosure, are illustrated. Figure 3 As shown, the light spot shaping device includes: a plurality of first light-shielding plates 11, second light-shielding plates 12 and a first light-shielding plate switching wheel 13. Figure 4 An exemplary structural diagram of a first light-shielding switching disk with a first light-shielding plate arranged according to some embodiments of this disclosure is shown, such as... Figure 4 As shown, a plurality of first light-shielding plates 11 are arranged circumferentially on a first light-shielding plate switching disk 13, such that by rotating the first light-shielding plate switching disk 13, any one of the plurality of first light-shielding plates 11 can be inserted into the light spot shaping optical path.

[0041] like Figure 4 As shown, in the above-mentioned light spot shaping equipment, the first light-shielding sheet 11 is circular and includes a circular light-shielding area 111 and an annular light-transmitting area 112. The annular light-transmitting area 112 is embedded in the circular light-shielding area 111, thereby forming a structure that blocks light in the center and allows light to pass through the edges. In practical applications, a transparent substrate can be made using various materials, such as plastic or glass, and then a circular light-shielding pattern can be formed in the center of the transparent substrate through inkjet printing, screen printing, or other processes to obtain the first light-shielding sheet.

[0042] By setting an annular light-transmitting area 112 on the first light-shielding plate 11, sufficient space can be reserved for the area of ​​the first light-shielding plate 11 that needs to transmit light, thereby effectively preventing interference between two adjacent first light-shielding plates 11 on the first light-shielding plate switching wheel 13. Assuming the first light-shielding plate only has a circular light-shielding area, light is transmitted through the unobstructed area (no medium or the medium is gas) surrounding the circular light-shielding area. If the distance between the adjacent first light-shielding plate and the current first light-shielding plate is too small, the circular light-shielding area of ​​the adjacent first light-shielding plate may block the light from the unobstructed area, resulting in a gap on the outer side of the formed annular light spot. In other words, the interference mentioned above includes: in two adjacent first light-shielding plates, the circular light-shielding area 111 of one first light-shielding plate blocks the light transmitted through the light-transmitting area of ​​the annular light spot formed by the other first light-shielding plate. In this disclosed embodiment, since the setting of the annular light-transmitting area 112 reserves sufficient physical space for light transmission in the annular light spot, the above-mentioned interference phenomenon can be effectively avoided.

[0043] It should be further explained that, in some embodiments, to prevent the first light-shielding plate switching wheel 13 from obstructing light transmission, the first light-shielding plate switching wheel 13 can be a transparent disc, with the first light-shielding plates 11 distributed circumferentially on the transparent disc. In other embodiments, the first light-shielding plate switching wheel 13 can also adopt the following structure: several supports extend radially outward from the rotation axis, and each support is used to fix one first light-shielding plate, so that the first light-shielding plates 11 are distributed circumferentially on the first light-shielding plate switching wheel 13.

[0044] In the aforementioned spot shaping device, the second light-shielding plate 12 is disposed in the spot shaping optical path and is positioned in the light transmission direction of the annular light-transmitting region 112. Therefore, a portion of the light in the light transmission direction of the annular light-transmitting region 112 will be blocked by the second light-shielding plate 12, causing the light to form a C-shaped spot after passing through the first light-shielding plate 11 and the second light-shielding plate 12, for use in irradiating the fundus. It should be noted that the first light-shielding plate here refers to the first light-shielding plate inserted into the spot shaping optical path.

[0045] Figure 5 A schematic diagram of the fundus structure of the human eye is shown, such as... Figure 5 As shown, photoreceptor cells in the human eye, such as cone cells, are most densely distributed in the macula, especially the fovea. This gives the fovea high visual acuity and color vision, while the peripheral retina can only sense weak light stimuli, exhibiting high sensitivity but lacking color vision and having poor visual acuity. The macular tract fibers originate from the macula and enter the temporal side of the optic disc in a straight line. The superior and inferior arcuate nerve fibers originate from the temporal side and superior and inferior sides of the macula, respectively, arcing around the macula above and below the temporal horizontal suture and entering the superior and inferior levels of the optic disc. When a C-shaped light spot illuminates the fundus, its central dark area aligns with the fovea, preventing stimulation, while its notched area aligns with the macular tract fibers, thus protecting the fovea and its conducting nerves from damage.

[0046] Furthermore, in some embodiments, in order to form the notch region in the C-shaped light spot, the second light-shielding plate 12 can be rectangular, fan-shaped, or trapezoidal. For ease of understanding, the following describes... Figures 6(a) to 6(c) The light-blocking process of the second light-shielding plate will be described here, taking the blocking process of the second light-shielding plate on the annular light spot transmitted from the annular light-transmitting area as an example. Figure 6(a) shows a schematic diagram of the light-blocking process of a rectangular second light-shielding plate according to some embodiments of this disclosure, Figure 6(b) shows a schematic diagram of the light-blocking process of a fan-shaped second light-shielding plate according to some embodiments of this disclosure, and Figure 6(c) shows a schematic diagram of the light-blocking process of a trapezoidal second light-shielding plate according to some embodiments of this disclosure. Figures 6(a) to 6(c)As shown, the second light-blocking plate can block part of the light from the annular spot, thereby forming an annular spot with a notch area, i.e., a C-shaped spot.

[0047] In the embodiments disclosed herein, the first light-shielding plate 11 and the second light-shielding plate 12 achieve light spot shaping by selectively blocking light. Therefore, in some embodiments, the light spot shaping device further includes a light source emitter 14, which is used to provide illumination light, and the first light-shielding plate 11 and the second light-shielding plate 12 inserted into the light spot shaping optical path are used to shape the illumination light into a C-shaped light spot.

[0048] As an example, such as Figure 3 As shown, the light source emitter 14, the first light-shielding plate switching wheel 13, and the second light-shielding plate 12 can be arranged sequentially. Specifically, the light source emitter 14, the first light-shielding plate 11 inserted into the light-shaping optical path, and the second light-shielding plate 12 are arranged sequentially along the optical axis, so that the illumination light emitted by the light source emitter 14 forms an annular light spot after passing through the first light-shielding plate 11 on the first light-shielding plate switching wheel 13. After passing through the second light-shielding plate 12, part of the light is blocked, thus forming a C-shaped light spot.

[0049] As another example, the second light-shielding plate 12 can also be disposed between the light source emitter 14 and the first light-shielding plate switching wheel 13. That is, the light source emitter 14, the second light-shielding plate 12 and the first light-shielding plate 11 inserted into the light shaping optical path are arranged sequentially along the optical axis, so that the illumination light emitted by the light source emitter 14 first passes through the second light-shielding plate 12 to form a circular light spot with a notch. The circular light spot then passes through the first light-shielding plate 11 on the first light-shielding plate switching wheel 13 and finally forms a C-shaped light spot.

[0050] Furthermore, the light spot shaping device may also include a projection lens (not shown in the figure) for projecting a C-shaped light spot onto the fundus. As an example, the projection lens may include a first lens and a second lens, which form the system structure of Kohler illumination. The position of the light shield is conjugate to the position of the fundus of the human eye, such that the illumination light is imaged on the retina. Thus, the shape and size of the illuminated area on the retina, i.e., the shape and size of the C-shaped light spot, can be changed by modifying the shape and size of the first and / or second light shield. As an example, the first lens may be disposed between the light source emitter 14 and the first light shield switching wheel 13, and the second lens may be disposed between the human eye and the first light shield switching wheel 13.

[0051] In some embodiments, the inner and outer diameters of the C-shaped light spot can be adjusted by switching different sizes of the first light-shielding plate. The inner diameter of the C-shaped light spot is adjusted by adjusting the diameter of the circular light-shielding area 111 on the first light-shielding plate 11, and the outer diameter of the C-shaped light spot can be adjusted by adjusting the outer diameter of the annular light-transmitting area 112 on the first light-shielding plate 11. At this time, an annular light-shielding area needs to be added to the first light-shielding plate 11 to limit the outer diameter of the annular light-transmitting area 112. Figure 7 An exemplary structural diagram of the first light-shielding sheet according to some embodiments of this disclosure is shown, such as... Figure 7 As shown, in addition to the circular light-blocking area 111 and the annular light-transmitting area 112, the first light-blocking plate also includes an annular light-blocking area 113, which is embedded outside the annular light-transmitting area 112, and the inner diameter of the annular light-blocking area 113 is the same as the outer diameter of the annular light-transmitting area 112. By inserting the first light-blocking plate 11 with different inner diameters of the annular light-blocking area 113 into the light spot shaping optical path, the outer diameter of the annular light-transmitting area 112 can be controlled, thereby forming C-shaped light spots with different outer diameters. Furthermore, by adjusting the inner diameter of the annular light-blocking area 113 and the diameter of the circular light-blocking area 111, the ring width of the C-shaped light spot can also be adjusted.

[0052] The size of the C-shaped light spot notch is adjusted by switching between different sizes of second light-shielding plates. In some embodiments, the light spot shaping device further includes a second light-shielding plate holder (not shown in the figure), which is disposed in the light transmission direction of the annular light-transmitting area, and the second light-shielding plate is detachably fixed to the second light-shielding plate holder. As an example, the second light-shielding plate holder is a sliding groove, allowing the second light-shielding plate inserted into the light spot shaping optical path to be replaced by plugging and unplugging.

[0053] It should be noted that the above description of the second light-shielding plate holder using a sliding groove is only an example in this disclosure. In practical applications, the second light-shielding plate holder may also adopt other structures.

[0054] Because there are certain differences in the fundus structure between individuals, such as the size of the fovea and the extent of the macular bundle fibers, the shape and size of the C-shaped light spot adapted to different users will also differ. Taking into account these differences in fundus structure, in some embodiments, the dimensions of several first light-shielding plates 11 on the first light-shielding plate switching wheel 13 can be designed to adapt to the personalized fundus structure size characteristics.

[0055] For a plurality of first light-shielding plates 11, the inner diameter of the annular light-transmitting area 112 is the same as the diameter of the circular light-shielding area 111. The diameter of the circular light-shielding area 111 ranges from [0.15 / k1, 2.5 / k1] mm, and the outer diameter of the annular light-transmitting area ranges from [2.5 / k1, 6 / k1] mm, where k1 represents the magnification factor when the light spot shaping device projects. Further, in some embodiments, the value of k1 can be in the range of [0.2, 0.65].

[0056] It should be noted that, assuming the diameter of the circular light-blocking area 111 of the first light-blocking plate 11 is d1 and the outer diameter of the annular light-transmitting area 112 is d2, the illumination light will form an annular light spot with an inner diameter of d1 and an outer diameter of d2 after passing through the first light-blocking plate 11. When this light spot is projected by the light spot shaping device, there is a magnification factor k1. Multiplying the size of the annular light spot with an inner diameter of d1 and an outer diameter of d2 by the magnification factor k1 will give the final size of the light spot projected onto the fundus.

[0057] Since the size range of the fovea of ​​the macula in the human eye is [0.15, 2.5] mm, and the size range of the arcuate nerve fibers above and below is [2.5, 6] mm, the size of each region on the first light-shielding plate 11 can be designed according to the size of the human eye's physiological structure. The diameter range of each region of the first light-shielding plate 11 can be obtained by dividing the size of the human eye's physiological structure by the magnification k1.

[0058] When designing or manufacturing different first light shields, several first light shields with different sizes are formed according to the diameter range of the above-mentioned regions, so as to match different fundus structures as much as possible and provide suitable C-shaped light spots for irradiation for different users.

[0059] The design basis for the dimensions of the first light-shielding plate 11 has been described above. The design of the dimensions of the second light-shielding plate 12 will now be described. In some embodiments, the dimensions of the second light-shielding plate 12 can be designed based on the dimensional characteristics of the macular fasciculus fibers. Since the macular fasciculus fibers originate from the macula and extend linearly into the temporal side of the optic disc in the physiological structure of the human eye, their radiation angle range can be (15°, 45°). Therefore, the central angle range corresponding to the notch in the C-shaped light spot is (15°, 45°).

[0060] As shown in Figure 6(b), in the fan-shaped second light-shielding sheet, the central angle α of the fan shape is (15°, 45°); as shown in Figure 6(c), in the trapezoidal second light-shielding sheet, the included angle β formed by the two legs of the trapezoid is [15°, 45°]; as shown in Figure 6(a), in the rectangular second light-shielding sheet, the central angle γ corresponding to the overlapping part of the second light-shielding sheet and the annular light-transmitting area in the light-transmitting direction on the first light-shielding sheet is [15°, 45°].

[0061] In some embodiments, the size of the second light-shielding plate 12 is fixed. In this case, second light-shielding plates of different sizes can be inserted into the light-shaping optical path by plugging and unplugging the second light-shielding plate placed on the second light-shielding plate holder. In other embodiments, the size of the second light-shielding plate 12 can be adjustable. As an example, the second light-shielding plate 12 includes a plurality of sub-light-shielding plates connected by hinges, so that the area of ​​the second light-shielding plate is adjustable. If the central angle corresponding to the notch of the desired C-shaped light spot is small, the plurality of sub-light-shielding plates can be folded up; if the central angle corresponding to the notch of the desired C-shaped light spot is large, the plurality of sub-light-shielding plates can be unfolded.

[0062] As described in the preceding embodiments, the first light-shielding sheet 11 and / or the second light-shielding sheet 12 can be designed with different sizes, thereby forming C-shaped light spots of different shapes and sizes through the light spot shaping device, so as to irradiate the fundus of different users and achieve personalized vision improvement solutions.

[0063] To ensure that the selected first light-shielding sheet 11 and / or second light-shielding sheet 12 have a certain degree of relevance and accuracy, some embodiments disclosed herein also add a controller 15 and a fundus imaging device 16 to the light spot shaping device. Figure 8 Exemplary structural diagrams of spot shaping devices according to some embodiments of this disclosure are shown, such as... Figure 8 As shown, the fundus imaging device 16 is connected to the controller 15. The fundus imaging device 16 is used to acquire fundus retinal images and transmit them to the controller 15. The controller 15 is also connected to the first light-shielding plate switching wheel 13. The controller 15 is used to control the first light-shielding plate switching wheel 13 to rotate so as to insert the matching first light-shielding plate 11 into the light spot shaping optical path according to the acquired fundus retinal images.

[0064] It should be noted that the fundus imaging device 16 and the controller 15 can be connected via a wired connection through a physical medium (such as a signal line) or wirelessly via technologies such as electromagnetic waves. The fundus imaging device 16 can employ imaging devices such as photoelectric sensors.

[0065] In terms of implementation, the controller 15 disclosed herein can be implemented as a central processing unit (CPU), an application processor (AP), an intelligent processing unit (IPU), or the like. Furthermore, the controller 15 disclosed herein can also be implemented in any suitable manner. For example, the controller 15 can take the form of, for example, a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro)processor, logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers, etc.

[0066] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A light spot shaping device for improving vision, characterized by include: A plurality of first light-shielding plates (11), second light-shielding plates (12), and a first light-shielding plate switching wheel (13); wherein, The first light-shielding sheet (11) is circular, and the first light-shielding sheet (11) includes: a circular light-shielding area (111) and an annular light-transmitting area (112), wherein the annular light-transmitting area (112) is embedded in the circular light-shielding area (111); The plurality of first light-shielding plates (11) are arranged circumferentially on the first light-shielding plate switching wheel (13), so that by rotating the first light-shielding plate switching wheel (13), any one of the plurality of first light-shielding plates (11) can be inserted into the light spot shaping optical path; The second light-shielding plate (12) is disposed in the light spot shaping optical path and is disposed in the light transmission direction of the annular light-transmitting area (112), so that the second light-shielding plate (12) can block part of the light in the annular light-transmitting area (112). After the light passes through the first light-shielding plate (11) and the second light-shielding plate (12), a C-shaped light spot is formed for irradiating the fundus.

2. The light spot shaping device according to claim 1, characterized in that The diameter of the circular light-blocking area (111) ranges from [0.15 / k1, 2.5 / k1] mm. The inner diameter of the annular light-transmitting area (112) is the same as the diameter of the circular light-blocking area (111). The outer diameter of the annular light-transmitting area (112) ranges from [2.5 / k1, 6 / k1] mm, where k1 represents the magnification factor when the light spot shaping device projects.

3. The light spot shaping device according to claim 1 or 2, characterized in that The first light-shielding sheet (11) further includes an annular light-shielding area (113), which is embedded in the annular light-transmitting area (112), and the inner diameter of the annular light-shielding area (113) is the same as the outer diameter of the annular light-transmitting area (112).

4. The light spot shaping device according to claim 1, characterized in that The second light-shielding sheet (12) is rectangular, fan-shaped or trapezoidal.

5. The spot shaping device according to claim 4, characterized in that, For the second light-shielding sheet (12) which is fan-shaped, the central angle of the fan is in the range of (15°, 45°); For the trapezoidal second light-shielding sheet (12), the included angle between the two legs of the trapezoid is [15°, 45°]; For the second light-shielding sheet (12) which is rectangular, the central angle range of the overlapping portion of the second light-shielding sheet (12) with the annular light-transmitting area (112) in the light-transmitting direction on the first light-shielding sheet (11) is [15°, 45°].

6. The light spot shaping device according to claim 1, characterized in that Also includes: The second light-shielding sheet is disposed in the light transmission direction of the annular light-transmitting area, and the second light-shielding sheet (12) is detachably fixed on the second light-shielding sheet.

7. The light spot shaping device according to claim 6, characterized in that The second light-shielding plate holder is a sliding groove, which allows the second light-shielding plate (12) inserted into the light spot shaping optical path to be replaced by plugging and unplugging.

8. The light spot shaping device according to claim 1, characterized in that The second light-shielding sheet (12) includes a plurality of sub-light-shielding sheets, which are connected by hinges so that the area of ​​the second light-shielding sheet (12) is adjustable.

9. The light spot shaping device according to claim 1, characterized in that Also includes: Controller (15) and fundus imaging device (16); wherein, The fundus imaging device (16) is connected to the controller (15), and the fundus imaging device (16) is used to acquire fundus retinal images and transmit them to the controller (15); The controller (15) is also connected to the first light-shielding plate switching wheel (13). The controller (15) is used to control the first light-shielding plate switching wheel (13) to rotate so as to insert the matching first light-shielding plate (11) into the light spot shaping optical path according to the fundus retinal image.

10. The light spot shaping device according to claim 1, characterized in that Also includes: A light source emitter (14) and a projection lens are arranged along the optical axis; In the light spot shaping device, the center of the first light-shielding plate inserted into the light spot shaping optical path coincides with the optical axis, the light source emitter (14) is used to provide illumination light, the first light-shielding plate (11) and the second light-shielding plate (12) are used to shape the illumination light into a C-shaped light spot, and the projection lens is used to project the C-shaped light spot onto the fundus.

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