Far and near universal glasses

Abstract

The utility model discloses a pair of far and near universal glasses, which belongs to the technical field of glasses and comprises a glasses frame, a convex lens and a concave lens, the convex lens and the concave lens are parallelly mounted on the glasses frame, and the convex lens is positioned on one side close to eyes. Adjusting mechanisms connected with the concave lens are arranged on the two sides of the concave lens and used for adjusting the distance between the concave lens and the convex lens, and the concave lens and the convex lens are combined to project a virtual image of an observed object to a distance range suitable for eyes of a user. According to the utility model, the convex lens and the concave lens are arranged on the glasses frame in parallel, and a virtual image of an observed object can be projected in a distance range which can be seen clearly by a user by setting the focal lengths of the concave lens and the convex lens and the distance between the two lenses, so that the user can see near objects and far objects clearly when wearing the glasses with presbyopia; the distance between the double-layer lenses on the two sides can be independently adjusted through the adjusting mechanism, so that a virtual image formed by the glasses accurately adapts to the left eye and the right eye of a user.

Description

Technical Field

[0001] This utility model relates to the field of eyeglasses technology, specifically to a pair of eyeglasses suitable for both near and far vision. Background Technology

[0002] Presbyopia is caused by the ciliary body losing elasticity with age, requiring the wearing of convex lenses to see clearly at close range. Convex lenses work by forming virtual images of objects smaller than their focal length at a distance, allowing the ciliary body to see clearly with a relatively small curvature. However, when the object being observed is beyond the focal length of the lens, a virtual image cannot be formed, and reading glasses must be removed to see clearly. Current solutions to this problem involve creating different focal lengths in different parts of the glasses to observe objects at different distances, but this method is very inconvenient.

[0003] The principle behind concave lenses for nearsighted eyes can be understood as forming a virtual image of distant objects at a closer distance. However, when a nearsighted eye observes a near object, the glasses project the virtual image of the object to an even closer position. Prolonged observation of near objects increases the burden on the ciliary muscle, thus worsening nearsightedness. This invention aims to solve the problem that existing corrective glasses cannot simultaneously handle both near and far distances, achieving a single pair of glasses suitable for both. Utility Model Content

[0004] The purpose of this invention is to provide a pair of glasses that can be used for both near and far vision, so as to solve the problem that existing corrective glasses cannot cover both near and far vision, and achieve the goal of using a single pair of glasses for both near and far vision.

[0005] To achieve the above objectives, this utility model provides a pair of glasses suitable for both near and far vision, comprising a frame, a convex lens, and a concave lens. The convex lens and the concave lens are mounted in parallel on the frame, with the convex lens located on the side closer to the eye. Adjustment mechanisms connected to the concave lens are provided on both sides of the concave lens, and the adjustment mechanisms are used to adjust the distance between the concave lens and the convex lens. The virtual image formed by the concave lens is within the focal length of the convex lens. The combination of the concave lens and the convex lens projects the virtual image of the observed object to a distance suitable for the user's eyes.

[0006] Preferably, the adjustment mechanism includes an outer shell, a sliding groove is provided on the side of the outer shell near the concave lens, a movable chamber is provided inside the outer shell and a movable block is provided inside the movable chamber, a slider is provided on one side of the movable block to slide in cooperation with the sliding groove, the slider is connected to the concave lens, a lead screw passes through the movable block and one end of the lead screw passes through the outer shell and is connected to a knob.

[0007] Preferably, the two sides of the movable block slide against the inner wall of the outer shell.

[0008] Preferably, the end of the lead screw away from the knob is connected to a bearing.

[0009] Preferably, the two sets of frames are connected by a nose pad and the temples are hinged to the outside of the frames.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model has a convex lens and a concave lens installed in parallel on the frame. By setting the focal length of the concave lens and the convex lens and the distance between the two lenses, the virtual image of the observed object can be projected within the distance range that the user can see clearly. This allows the user with presbyopia to see both near and far objects clearly. The distance between the double-layer lenses on both sides can be adjusted independently by the adjustment mechanism, so that the virtual image formed by the glasses can be accurately adapted to the user's left and right eyes.

[0011] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0012] Figure 1 This is a schematic cross-sectional view of the present invention. Figure 1 ;

[0013] Figure 2 This utility model Figure 1 A magnified view of the structure at point A in the middle;

[0014] Figure 3 This utility model Figure 1 A magnified schematic diagram of the structure at point B in the middle;

[0015] Figure 4 This is a schematic cross-sectional view of the present invention. Figure 2 ;

[0016] Figure 5 This utility model Figure 4 A magnified schematic diagram of the structure at point C in the middle;

[0017] Figure 6 This utility model Figure 4 A magnified schematic diagram of the structure at point D in the middle;

[0018] Figure 7 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 8 This is a simulation diagram of the virtual image formed by the lens structure of this utility model;

[0020] Figure 9 This is a simulation diagram of the light path of the lens structure of this utility model; orange represents the backward extension line of the light.

[0021] Figure 10 This is a schematic diagram illustrating the change in the position of the virtual image when the focal length of the concave lens is changed according to this utility model.

[0022] Figure 11 This is a schematic diagram illustrating the change in the virtual image position due to the change in the focal length of the convex lens according to this utility model.

[0023] Figure 12 This is a schematic diagram illustrating the change in the virtual image position due to altering the distance between the two lenses in this invention.

[0024] Figure 13 This is a schematic diagram of a self-made physical experiment for this utility model. Figure 1 ;

[0025] Figure 14 This is a schematic diagram of a self-made physical experiment for this utility model. Figure 2 ;

[0026] Figure 15 This is a schematic diagram of a self-made physical experiment for this utility model. Figure 3 .

[0027] In the diagram: 1. Frame; 2. Convex lens; 3. Concave lens; 4. Outer shell; 401. Slide groove; 5. Movable chamber; 6. Movable block; 601. Slider; 7. Lead screw; 701. Bearing; 8. Knob; 9. Nose pad; 10. Temple. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-7 A pair of glasses suitable for both near and far vision includes a frame 1, a convex lens 2 and a concave lens 3. The convex lens 2 and the concave lens 3 are mounted in parallel on the frame 1, with the convex lens 2 located on the side closer to the eye. A nose pad 9 connects the two sets of frames 1, and temples 10 are hinged to the outside of the frame 1.

[0030] The concave lens 3 is provided with adjustment mechanisms on both sides, which are connected to the concave lens 3 and are used to adjust the distance between the concave lens 3 and the convex lens 2. The virtual image formed by the concave lens 3 is within the focal length of the convex lens 2. The combination of the concave lens 3 and the convex lens 2 projects the virtual image of the observed object into a distance suitable for the user's eyes.

[0031] The adjustment mechanism includes an outer casing 4. A groove 401 is provided on the side of the outer casing 4 near the concave lens 3. A movable chamber 5 is located inside the outer casing 4, and a movable block 6 is located within the movable chamber 5. A slider 601 is provided on one side of the movable block 6, which slides in conjunction with the groove 401. The slider 601 is connected to the concave lens 3. A lead screw 7 passes through the movable block 6, and one end of the lead screw 7 passes through the outer casing 4 and is connected to a knob 8. The adjustment mechanism is integrated into the lens frame 1, ensuring overall aesthetics.

[0032] Specifically, the two sides of the movable block 6 slide against the inner wall of the outer shell 4.

[0033] Specifically, the end of the lead screw 7 away from the knob 8 is connected to a bearing 701.

[0034] The working principle of this embodiment is as follows: When using these glasses that can be used for both near and far vision, the focal lengths of the concave lens 3 and convex lens 2 are first set according to the imaging formula 1 / u + 1 / v = 1 / f (where u is the distance from the object to the center of the lens, v is the distance from the image to the center of the lens, and f is the focal length of the lens), so that the virtual image formed by the glasses falls within the user's clear vision range. Then, during use, the knob 8 drives the lead screw 7 to rotate, thereby moving the movable block 6 within the movable chamber 5, which in turn moves the concave lens 3, thus adjusting the distance between the concave lens 3 and the convex lens 2 to meet the user's correction needs in different situations. The knob 8 is located on the front side for easier adjustment. The distance between the double-layered lenses on both sides of the frame 1 can be independently adjusted through the adjustment mechanism, allowing the virtual image formed by the glasses to accurately adapt to the user's left and right eyes.

[0035] Based on lens imaging theory, the focal length combination and inter-lens distance of a double-lens group were derived, enabling the projection of the virtual image formed by the double-lens group onto a position that the user can clearly see. Corresponding simulation experiments and physical experiments were conducted.

[0036] The website for optical experiments is:

[0037] https: / / phydemo.app / ray-optics / simulator / ?zh-CN

[0038] Experimental results are as follows Figures 8-15 As shown.

[0039] Experimental conclusion:

[0040] 1. By setting the focal lengths of the convex and concave lenses, a double-lens group can be formed so that objects that are too far away or too close can be clearly formed into virtual images within a specified distance from the lens group. In other words, a pair of reading glasses can see objects at both near and far distances clearly at the same time. This specified distance is within the range from infinity to the focal length of the convex lens.

[0041] 2. Once the focal lengths of the convex and concave lenses are determined, the position of the virtual image can also be adjusted by adjusting the distance between the two lenses, allowing users to increase the image clarity of the lens group according to their personal wearing habits.

[0042] Explanation of the principle: The eye can see objects clearly by adjusting itself to form an image on the retina. For normal people, objects from infinity to a few centimeters away can be imaged on the retina. However, for nearsighted individuals, distant objects cannot be imaged on the retina. For example, with 100 degrees of myopia, objects at a distance of approximately 100 centimeters cannot be clearly imaged on the retina, and with 300 degrees of myopia, objects at a distance of approximately 33 centimeters cannot be clearly imaged on the retina. Presbyopia is the opposite; only objects at a distance of tens of centimeters can be clearly imaged on the retina. The adjustment principle of nearsighted glasses is based on the fact that objects passing through a concave lens can form virtual images at relatively close distances. According to the lens imaging formula 1 / u + 1 / v = 1 / f (where u is the distance from the object to the center of the lens, v is the distance from the image to the center of the lens, and f is the focal length of the lens), for example, if a user with 100 degrees of vision can only see objects within 100 centimeters, then a lens focal length of 1m can be chosen. In this way, the virtual images of external objects will all be within 100 centimeters after passing through the concave lens. Presbyopia typically only allows the eye to see objects a few tens of centimeters away. Therefore, a convex lens is needed to project a virtual image of the nearby object to the corresponding distance. For example, someone with moderate presbyopia can only see an object 40 centimeters away, but their reading distance is typically 25 centimeters. They would need a convex lens with a focal length of 67 centimeters for adjustment. However, if the object distance exceeds the focal length, a virtual image cannot be formed, and the person wearing the glasses will not be able to see an object 67 centimeters away. By combining a concave lens and a convex lens, the virtual image can be projected to a set distance range. Using the example of a person who can see an object 40 centimeters away, with a lens distance of 1 centimeter, the imaging formula shows that a concave lens focal length of 3.5 centimeters and a convex lens focal length of 4.5 centimeters will allow them to see objects at a distance of 25 centimeters and distant objects clearly. Similarly, for nearsightedness, calculating the focal lengths of the concave and convex lenses allows the virtual image to be projected to the required range. In practical implementation, factors such as the overall thickness of the glasses need to be considered. The greater the distance between the two lenses, the wider the adjustable range; the smaller the distance between the two lenses, the more precise the adjustment components need to be. Therefore, when using glasses of this invention, it is necessary to first measure the range of distances from which the user can clearly see objects, and then calculate the focal lengths of the matching concave and convex lenses based on this distance value and the thickness of the glasses.

[0043] Any content not described in detail in this specification is prior art known to those skilled in the art.

[0044] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pair of glasses suitable for both near and far vision, characterized in that: The device includes a frame (1), a convex lens (2), and a concave lens (3). The convex lens (2) and the concave lens (3) are mounted in parallel on the frame (1), with the convex lens (2) located on the side closer to the eye. The concave lens (3) has adjustment mechanisms on both sides connected to it, which are used to adjust the distance between the concave lens (3) and the convex lens (2). The virtual image formed by the concave lens (3) is within the focal length of the convex lens (2). The concave lens (3) and the convex lens (2) are combined to project the virtual image of the observed object to a distance suitable for the user's eyes.

2. The eyeglasses for both near and far vision according to claim 1, characterized in that: The adjustment mechanism includes an outer shell (4), on which a groove (401) is provided on the side of the outer shell (4) near the concave lens (3). A movable chamber (5) is provided inside the outer shell (4), and a movable block (6) is provided inside the movable chamber (5). A slider (601) is provided on one side of the movable block (6) to slide in cooperation with the groove (401). The slider (601) is connected to the concave lens (3). A lead screw (7) passes through the movable block (6), and one end of the lead screw (7) passes through the outer shell (4) and is connected to a knob (8).

3. The eyeglasses for both near and far vision according to claim 2, characterized in that: The movable block (6) slides against the inner wall of the outer shell (4) on both sides.

4. The eyeglasses for both near and far vision according to claim 2, characterized in that: The end of the lead screw (7) away from the knob (8) is connected to a bearing (701).

5. The eyeglasses for both near and far vision according to claim 1, characterized in that: The two sets of frames (1) are connected by a nose pad (9) and the outside of the frames (1) is hinged with a temple (10).

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