Light and thin diopter lens and glasses

Abstract

The light and thin diopter lens comprises a negative-focal-power lens, film layers used for achieving the light splitting effect are arranged on the surfaces of the two sides of the negative-focal-power lens respectively, environment light enters from the environment side surface of the negative-focal-power lens, is reflected on the human eye side surface and then is reflected on the environment side surface again, and the light splitting effect is achieved. The light is emitted from the side surface of the human eye and finally enters the human eye for imaging; the two side surfaces of the negative focal power lens reflect the ambient light twice, so that part of the ambient light forms the turn-back light path in the negative focal power lens, and the diopter of the vision correction light path comprising the turn-back light path is matched with the vision of human eyes. According to the light and thin type diopter lens, the myopia correction function is achieved mainly through the reflecting surface of the negative-focal-power lens, the thickness of the lens can be greatly reduced, the wearing feeling and attractiveness are improved on the premise that vision correction is guaranteed, and the light and thin type diopter lens is particularly suitable for correction of high myopia of 600 degrees or above.

Description

Technical Field

[0001] This invention relates to a thin and light-sensitive lens, particularly to an ultra-thin lens suitable for people with high myopia, and also to eyeglasses, belonging to the field of myopia eyeglasses. Background Technology

[0002] Myopia is a growing problem worldwide, and this trend has become a public health challenge of concern to countries around the world. High myopia is defined as refractive error with a degree of myopia of -6.00D or higher. my country is a typical country with a high incidence of high myopia. High myopia often leads to permanent vision impairment and even blindness, and is currently the second leading cause of blindness in my country.

[0003] Simple high myopia is primarily treated with refractive correction; eyeglasses are simple, effective, and have no significant contraindications. Currently, most myopia glasses are made from single spherical or aspherical concave lenses. The higher the patient's myopia, the greater the refractive power required by the glasses, resulting in a more concave lens shape. This leads to a higher refractive index and a sharp increase in edge thickness, reducing the aesthetics and wearing comfort of the lenses.

[0004] Currently, in high myopia glasses, the center thickness of the lens is generally over 3mm and the edge thickness is over 10mm. Moreover, the solutions to the problem of excessive edge thickness are limited to shaping or cutting the lens edge into a flat surface, which is only a temporary fix. Summary of the Invention

[0005] The primary technical problem to be solved by this invention is to provide a thin and lightweight lens.

[0006] Another technical problem to be solved by the present invention is to provide eyeglasses using the above-mentioned thin and light lenses.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] A thin and lightweight lens includes a negative power lens. Two films for beam splitting are respectively disposed on both sides of the negative power lens. Ambient light enters from the ambient side surface of the negative power lens, is reflected again from the eye side surface, and then exits from the eye side surface, ultimately entering the eye to form an image. The two reflections of ambient light by the two sides of the negative power lens cause a portion of the ambient light to form the aforementioned reflected light path within the negative power lens. The refractive power of the vision correction optical path including the reflected light path matches the visual acuity of the human eye.

[0009] Preferably, the two surfaces of the negative power lens are concave towards the human eye.

[0010] Preferably, the film layer disposed on the environmental side surface and the human eye side surface for achieving the spectral dispersion function is a partial reflective film. The transmittance-to-reflection ratio of the partial reflective film is preferably 1:1.

[0011] Alternatively, preferably, the film layer disposed on the environmental side surface for achieving beam splitting is a partially reflective film, and the film layer disposed on the human eye side surface for achieving beam splitting is a first quarter-wave plate and a polarizing beam splitter, wherein the first quarter-wave plate is disposed between the negative power lens and the polarizing beam splitter.

[0012] Preferably, a linear polarizer and a second quarter-wave plate are disposed on the environmentally facing side of the partial reflective film, the second quarter-wave plate being disposed between the linear polarizer and the partial reflective film, and the polarization transmission direction of the linear polarizer being perpendicular to the polarization transmission direction of the polarization beam splitter.

[0013] Preferably, the thin and light lens further includes a compensating lens disposed on the first and / or second side of the negative power lens; the adjacent surfaces of the compensating lens and the negative power lens have the same shape and are cemented together to form a composite lens; the absolute value of the optical power of the compensating lens is not greater than 5D.

[0014] Preferably, the edge thickness and center thickness of the composite lens are both less than 10 mm.

[0015] Preferably, the optical power corresponding to the refracting optical path of the negative optical power lens is selected from -100D to 0D;

[0016] The transmittance of the negative optical power lens is selected from -20D to 0D.

[0017] Preferably, the corresponding optical power of the vision correction optical path is selected from -100D to -6D.

[0018] An eyeglass, comprising the aforementioned thin-lens prescription lens.

[0019] The thin and light-sensitive lens provided by this invention includes a negative power lens with a refracting optical path. Optical power is primarily provided through reflection from the optical surfaces on both sides of the negative power lens. Myopia correction is achieved through the refractive optical path including the refracting optical path of the negative power lens, significantly reducing lens thickness and improving wearing comfort and aesthetics while ensuring vision correction. This thin and light-sensitive lens, specifically designed for myopia glasses, especially high myopia glasses, solves the problem of excessively thick lenses from an optical principle perspective. It can control the overall thickness of corrective lenses in the range of -100D to 0D to within 10mm, making it particularly suitable for correcting high myopia of 600 degrees or more. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the vision correction optical path of the vision correction lens according to Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the vision correction optical path of the vision correction lens according to Embodiment 2 of the present invention;

[0022] Figure 3 This is a schematic diagram of the vision correction optical path of the vision correction lens according to Embodiment 3 of the present invention;

[0023] Figure 4 This is a schematic diagram of the vision correction optical path of the vision correction lens according to Embodiment 4 of the present invention;

[0024] Figure 5 This is a schematic diagram of the vision correction optical path of the vision correction lens according to Embodiment 5 of the present invention;

[0025] Figure 6 This is a schematic diagram of the vision correction optical path of the vision correction lens according to Embodiment 6 of the present invention;

[0026] Figure 7 This is a schematic diagram of the vision correction optical path of the vision correction lens according to Embodiment 7 of the present invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0030] This invention provides eyeglasses suitable for people with high myopia, wherein thin, high-prescription lenses made of optical glass or resin optical materials are used. For example... Figures 1 to 7 As shown, this thin and light-sensitive vision correction lens (hereinafter referred to as the vision correction lens) includes a concave lens with a reflective optical path, and uses a refractive optical path containing the reflective optical path to correct human visual acuity. The refractive optical path containing the reflective optical path is the vision correction optical path, and the refractive power of the vision correction optical path matches the human visual acuity.

[0031] like Figure 1 As shown, when the lens consists only of negative power lenses, the refractive power corresponding to the reflected light path of the negative power lens matches the visual acuity of the human eye. For example... Figures 2 to 7 As shown, in the above-mentioned vision correction optical path, a compensating lens can be set as needed, and the compensating lens can be cemented with a concave lens to form a composite lens. The refractive power of the vision correction optical path provided by the composite lens as a whole, including the refracting optical path, matches the visual acuity of the human eye. The refractive power provided by the refracting optical path of the negative power lens alone does not match the visual acuity of the human eye precisely, and there is still a certain difference.

[0032] like Figure 1 The illustrated lens includes a negative power lens 50, which is a meniscus negative lens, similar in shape to a regular lens. Both surfaces of the negative power lens 50 (ambient side surface 501 and eye side surface 502) are concave towards the eye 10, with the radius of curvature of the eye side surface 502 being smaller than that of the ambient side surface 501. Films for beam splitting are provided on both surfaces of the negative power lens. Ambient light (natural parallel light) enters the negative power lens 50 from the ambient side surface 501, is reflected again from the eye side surface 502, and then exits from the eye side surface 502 to form an image in the eye.

[0033] like Figures 2 to 7 As shown, in a compound lens including a negative power lens 50, depending on the arrangement of the compensation lens, the vision correction optical path, including the refraction optical path, is different; ambient light first passes through the compensation lens and then enters the refraction optical path of the negative power lens, and then leaves the compound lens to enter the human eye for imaging; or, ambient light first passes through the refraction optical path of the negative power lens and then enters the compensation lens, and then leaves the compound lens to enter the human eye for imaging; or, ambient light first passes through the first compensation lens and then enters the refraction optical path of the negative power lens, then enters the second compensation lens, and finally leaves the compound lens to enter the human eye for imaging.

[0034] In the aforementioned lens, the secondary reflection of external light in the negative power lens can be achieved by coating a portion of the reflective film on the front surface (environmental side surface 501) and the rear surface (eye side surface 502) of the negative power lens, respectively, or by coating a portion of the reflective film on the front surface (environmental side surface 501) of the negative power lens and attaching at least one quarter-wave plate and a polarizing beam splitter to the rear surface (eye side surface 502) of the negative power lens, thereby achieving polarization reflection.

[0035] When the method of realizing secondary reflection of light path involves a polarizing film, at least one layer of circular polarizer (including linear polarizer and quarter-wave plate) can be attached to the partially reflective film coating surface or any surface before that surface (i.e. any surface of the compensating lens on the side of the negative optical power lens facing the environment) to convert the light incident on the glasses into circularly polarized light, thereby eliminating stray light and improving the experience and comfort.

[0036] Traditional myopia lenses rely solely on optical transmission for refractive power, resulting in a smaller radius of curvature and thicker edges as the required refractive power increases. The myopia lens provided in this application, however, has its overall refractive power comprised of both transmitted and reflected light. This allows for increased reflected light power and decreased transmitted light power while maintaining a constant overall refractive power. This reduces the difference in curvature between the front and back surfaces of the lens, thereby reducing its overall thickness and achieving a thinner, lighter design.

[0037] Specifically, by setting film layers on both sides of the negative power lens to achieve beam splitting, a reflected light path is formed in the negative power lens. By introducing two reflective surfaces, the negative power lens reduces the optical power requirement of the two refractive surfaces, thus reducing the curvature difference between the front and rear surfaces of the lens and reducing the edge thickness of the lens. The lens is thin and light, with both its center thickness and edge thickness not exceeding 10 mm. Preferably, the center thickness is between 1 mm and 7 mm.

[0038] The aforementioned negative optical power lens 50 has a transmitted optical power range of -20D to 0D. Vision correction corresponding to the optical power range of -100D to 0D can be achieved through a refractive optical path including a refracting optical path. Preferably, the corresponding optical power of the vision correction optical path is selected from -100D to -6D, demonstrating a thinner and lighter advantage compared to traditional direct-transmission vision correction schemes.

[0039] To correct optical aberrations in the vision correction optical path, or to introduce AC / A compensation and astigmatism compensation, compensation lenses are provided on one or both sides of the negative power lens 50 to increase the optical surface area. The adjacent surfaces of the compensation lens and the negative power lens 50 have the same shape and are cemented together to form a composite lens; the absolute value of the optical power of the compensation lens is no greater than 5D; preferably, the transmitted optical power of the composite lens is selected from -5D to +5D, for example, the transmitted optical power of the composite lens is controlled between -3D and +3D to maintain the overall thin and light shape of the lens. In this composite lens, the refractive power of the vision correction optical path is mainly borne by the reflective surface of the negative power lens. The compensation lens can correct aberrations for the positive lens, further increase the refractive power of the negative lens, or be removed to directly reflect the optical path of a single lens.

[0040] In the aforementioned ultra-thin power lens, the double reflection of ambient light by the two surfaces of the negative power lens 50 causes some ambient light to form a reflected light path within the negative power lens 50. The refractive power of the vision correction light path including the aforementioned reflected light path matches the visual acuity of the human eye. That is, after natural parallel light passes through the aforementioned vision correction light path, the light emitted from the surface closest to the human eye is a divergent light, and the degree of divergence of this light matches the visual acuity corresponding to the human eye's visual acuity. The aforementioned power lens is preferably suitable for people with high myopia (those with a refractive power correction range of -6D to -100D). For patients with low myopia, because the difference between the center thickness and the edge thickness of the lens is not significant, and because the reflected light path reduces the light efficiency, this type of ultra-thin power lens is not the preferred choice for daily wear by this group. However, it is still suitable for certain scenarios such as outdoor activities.

[0041] First Embodiment

[0042] Figure 1 This is a schematic diagram of the vision lens provided in the first embodiment, in which only one negative lens 50 is used. The front surface 501 and the rear surface 502 of the negative lens 50 are respectively coated with a partially reflective film (preferably a semi-reflective and semi-transparent film). High myopia correction is achieved by reflecting the light path through the negative lens 50.

[0043] The vision correction optical path is as follows: ambient light is transmitted through the front surface 501 of the negative lens 50 and enters the interior of the negative lens 50. After being reflected by the rear surface 502, it returns to the front surface 501 and is reflected again at the front surface 501 to the rear surface 502. Then, the light passes through the rear surface 502 and enters the corneal surface 101 of the human eye 10. After passing through the pupil 102 and the lens 103, it forms an image on the retina 104.

[0044] Table 1 Optical parameters of the lens in the first embodiment

[0045] Surface number Surface type radius of curvature thickness Refractive index Abbe number 501 spherical 160 1.5 1.74 53 502 spherical 90

[0046] Table 1 provides a set of optical parameters for the lens in the first embodiment. The front surface 501 and rear surface 502 are spherical, and both surfaces are coated with a partially reflective film (preferably a semi-reflective, semi-transparent film). The refractive power corresponding to the reflected light path of the negative lens 50 is -20D, with a center thickness of 1.5mm and an edge thickness of 2.5mm. The lens provided in this embodiment achieves high refractive power correction using only a single negative lens while maintaining its thin and light characteristics.

[0047] As can be seen from the above embodiments, by utilizing the principle of optical path reflection, vision correction for people with high myopia can be achieved using a single negative lens. However, due to aberrations in the reflected optical path, in order to improve image quality, AC / A compensation and astigmatism compensation can be introduced. This involves adding a compensating lens to one or both surfaces of the negative power lens and cementing the compensating lens with the negative lens to form a composite lens. The compensating lens can be a positive or negative lens, and its shape is not limited.

[0048] In composite lenses, for a human eye with a predetermined visual acuity, the refractive power of the vision correction optical path of the lens is mainly provided by the two reflecting surfaces of the negative power lens. The compensating lens is a non-reflective optical path, and its optical power is small, so it has little impact on the optical power of the vision correction optical path. However, the presence of the compensating lens can significantly correct aberrations and improve image quality. Furthermore, to accommodate the complex physiological characteristics of the human eye, the optical surfaces of the negative power lens and the compensating lens can be designed as spherical, aspherical, or made with aberrations and cylindrical surfaces, as needed, to simultaneously achieve AC / A compensation or astigmatism compensation. The inclusion of a compensating lens also reduces the design complexity of the lens. Several embodiments of composite lenses with compensating lenses are described below.

[0049] Second Embodiment

[0050] like Figure 2 The myopia lens 20 shown is formed by cementing two single lenses of the same size and shape together. The myopia lens 20 includes a negative power lens 21 and a positive power lens 22, wherein the negative power lens 21 forms a reflected optical path, and the positive power lens 22 serves as a compensating lens. In this embodiment, the negative power lens 21 is positioned away from the human eye. The negative power lens 21 is a meniscus concave lens with an object-side surface 201 (front surface) and an eye-side surface 202 (intermediate surface), wherein the object-side surface 201 is formed as a convex surface facing the object side, and the eye-side surface 202 is formed as a concave surface with a radius of curvature smaller than that of the object-side surface 201. The positive power lens 22 is positioned closer to the human eye, and its object-side surface and intermediate surface 202 have completely identical surface parameters and are cemented together; they are not separately numbered here. The radius of curvature of the eye-side surface 203 (rear surface) of the positive power lens 22 is greater than that of the intermediate surface 202.

[0051] The vision correction optical path of this lens 20 has the refractive power of a prescription for correcting myopia; external light passes through the front surface 201 of the refractive correction lens 20 and enters the negative power lens 21, is reflected by the intermediate surface 202 and then reaches the front surface 201 again, is reflected by the front surface 201 and then passes through the intermediate surface 202 again to enter the compensating lens 22, and then is transmitted through the rear surface 203 to reach the corneal surface 101 of the human eye 10, and passes through the pupil 102 and lens 103 of the human eye to form an image on the retina 104.

[0052] In this myopia lens, the radius of curvature R of the front surface 201 201 The value is greater than the radius of curvature R of the intermediate surface 202 202 The rear surface 203 can be made into a surface with angular aberration and cylindricality to complete AC / A compensation or astigmatism compensation. At the same time, the rear surface 203 can also be used for further aberration correction.

[0053] Table 2 Optical parameters of the lens in the second embodiment

[0054]

[0055]

[0056] Table 2 is... Figure 2 A set of design parameters corresponding to the embodiment, wherein the front surface 201 and the rear surface 202 are respectively coated with a partial reflective film, the corresponding refractive power of the vision correction optical path of the myopia lens 20 is -50D, the center thickness of the lens is 4mm, and the edge thickness is 6mm.

[0057] Third Embodiment

[0058] like Figure 3 The lens 20 shown is made of two single lenses of the same size and shape bonded together, including: a negative power lens 21 and a positive power lens 22. The negative power lens 21 is used to form a reflected light path, and the positive power lens 22 is used as a compensating lens.

[0059] Compared to the second embodiment, the positions of the positive power lens 22 and the negative power lens are different in this embodiment. In this embodiment, the negative power lens 21 is positioned close to the human eye. The negative power lens 21 is a meniscus concave lens having an object-side surface 202 (intermediate surface) and an eye-side surface 203 (rear surface), wherein the object-side surface 202 is formed as a convex surface facing the object side, and the eye-side surface 203 is formed as a concave surface with a curvature greater than that of the object-side surface 202. The radius of curvature of the object-side surface 201 (front surface) of the positive power lens 22 is smaller than that of the intermediate surface 202. The surface parameters of the eye-side surface and the intermediate surface 202 of the positive power lens 22 are consistent and cemented together, and are not separately numbered here.

[0060] The vision correction optical path of the lens 20 has the refractive power of a prescription for correcting myopia; external light is transmitted through the front surface 201 into the compensating lens 22, transmitted through the intermediate surface 202 into the negative lens 21, and then reaches the rear surface 203. It is reflected by the rear surface 203 back to the intermediate surface 202, reflected again by the intermediate surface 202, and transmitted through the rear surface 203 to reach the corneal surface 101 of the human eye 10. It is then imaged on the retina 104 through the pupil 102 and the lens 103.

[0061] In this myopia correction eyeglass, the radius of curvature R of the intermediate surface 202 202 The value is greater than the radius of curvature R of the rear surface 203. 203 The rear surface 203 can also be made into a surface with angularity and cylindricality to complete AC / A compensation or astigmatism compensation.

[0062] Table 3 Optical parameters of the lens in the third embodiment

[0063]

[0064]

[0065] Table 3 is... Figure 3 A set of design parameters corresponding to the embodiment, wherein surface 202 and surface 203 are coated with a partial reflective film, the corresponding refractive power of the vision correction optical path of the vision correction lens 20 is -25D, the center thickness of the lens is 4mm, and the edge thickness is 5.5mm.

[0066] Fourth embodiment

[0067] Figure 4 In the embodiment shown, the vision lens 20 is made of two lenses of the same size and shape bonded together, including a negative power lens 21 and a positive power lens 22. The negative power lens 21 is used to form a reflected light path, and the positive power lens 22 is used as a compensating lens. The negative power lens 21 is set away from the human eye.

[0068] The negative power lens 21 and positive power lens 22 in this embodiment have the same... Figure 2 The negative power lens 21 and positive power lens 22 in the second embodiment shown have similar designs, the difference being that the films used to achieve beam splitting on both sides of the negative power lens 21 are different. In this embodiment, the principle of polarization beam splitting is used to achieve optical path reversal.

[0069] Specifically, in this embodiment, a linear polarizer 206, a quarter-wave plate 207, and a partial reflective film are sequentially disposed on the front surface 201 of the negative power lens 21 from the ambient side to the human eye side. The linear polarizer 206 and the quarter-wave plate 207 are used to convert natural light into circularly polarized light. A quarter-wave plate 204 and a polarizing beam splitter 205 are sequentially disposed on the rear surface 202 (i.e., the middle surface 202) of the negative power lens 21 from the ambient side to the human eye side. The polarization transmission directions of the polarizing beam splitter 205 and the linear polarizer 206 are perpendicular.

[0070] The path of the vision correction optical path is as follows: external light is converted into first linearly polarized light (e.g., S-polarized light) by linear polarizer 206, and then into first circularly polarized light (e.g., left-handed circularly polarized light) after passing through quarter-wave plate 207. Part of the light is transmitted through the front surface 201 and the intermediate surface 202, and then into first linearly polarized light after passing through quarter-wave plate 204. After being reflected by polarizing beam splitter 205, it is converted into first circularly polarized light after passing through quarter-wave plate 204. It is transmitted through the intermediate surface 202 and reflected by the front surface 201, and then into second circularly polarized light (e.g., right-handed circularly polarized light). After passing through the intermediate surface 202, it passes through quarter-wave plate 204 again, and the light is converted into second linearly polarized light (e.g., P-polarized light). Then it is transmitted through polarizing beam splitter 205 and through the rear surface 203, and reaches the eye 10. It is transmitted through the cornea 101 of the human eye 10, and finally forms an image on the retina 104 after passing through the pupil 102 and the lens 103.

[0071] In the diopter lens of this embodiment, the radius of curvature R of surface 201 is... 201 The value of the radius of curvature R of surface 202 202 The surface 203 can also be made into a surface with angularity and cylindricality to complete AC / A compensation or astigmatism compensation.

[0072] Table 4: Optical parameters of the lens in the third embodiment

[0073] Surface number Surface type radius of curvature thickness Refractive index Abbe number 201 spherical 200 1.3 1.74 51.30 202 spherical 80 1.5 1.67 53 203 spherical 110

[0074] In this embodiment, a linear polarizer 206, a quarter-wave plate 207, and a partial reflective film are coated on the surface 201. A quarter-wave plate 204 and a polarizing beam splitter 205 are disposed between the negative power lens 21 and the positive power lens 22. The refractive power achieved by the vision correction optical path is -30D, the center thickness of the lens is 2.8mm, and the edge thickness is 4.2mm.

[0075] Fifth Embodiment

[0076] Figure 5 In the embodiment shown, the myopia correction glasses 20 are made of two lenses of the same size and shape bonded together, including a negative power lens 21 and a positive power lens 22. The negative power lens 21 is used to form a reflective optical path, and the positive power lens 22 is used as a compensating lens.

[0077] The negative power lens 21, positive power lens 22, and polarizing film system in this embodiment are similar in design to those in the fourth embodiment. The difference is that in this embodiment, the negative power lens 21 is positioned close to the human eye, and the surface of both sides of the negative power lens 21 is aspherical.

[0078] In this embodiment, a quarter-wave plate 204 and a polarizing beam splitter 205 are provided on the eye-facing surface (rear surface) 203 of the negative optical power lens 21; a partial reflective film is provided on the environmental surface (middle surface) 202 of the negative optical power lens 21; and no linear polarizer or quarter-wave plate is provided on the environmental side of the negative optical power lens 21.

[0079] The aforementioned viewing lens can be used to view displays that emit circularly polarized light, or to view natural light directly. When viewing a display screen emitting left-handed circularly polarized light using the aforementioned lens, the polarization state conversion process of the light in the vision correction optical path is similar to that in the fourth embodiment. Specifically, the optical path is as follows: left-handed circularly polarized light is transmitted through the positive power lens 22, and part of the light is transmitted through the negative power lens 21, reaching the rear surface 203. After passing through the quarter-wave plate 204, it becomes S-polarized light. Then, after being reflected by the polarizing beam splitter 205, the S-polarized light is converted into left-handed circularly polarized light after passing through the quarter-wave plate 204. After passing through the surface 203, it is reflected by the surface 202. At this time, the rotation direction of the circularly polarized light is reversed, becoming right-handed circularly polarized light. After being transmitted through the surface 203 again, it passes through the quarter-wave plate 204 again, and the circularly polarized light is converted into linearly polarized light. The direction is rotated by 90 degrees to become P-light. At this time, the light will pass through the polarizing reflector 205, leave the vision correction lens, reach the eye 10, be transmitted through the cornea 101 of the human eye 10, and pass through the pupil 102 and the lens 103, finally forming an image on the retina 104.

[0080] The optical path for vision correction in the lens is similar to the path described above. Specifically, the ambient light is transmitted through the positive power lens 22, and some of the light is transmitted through the negative power lens 21. It reaches the rear surface 203, passes through the quarter-wave plate 204, and then the light containing the S-polarized component is reflected by the polarizing beam splitter 205. After passing through the quarter-wave plate 204, it is converted into left-handed circularly polarized light. After passing through the surface 203, it is reflected by the surface 202. At this time, the rotation direction of the circularly polarized light is reversed, becoming right-handed circularly polarized light. After passing through 203 again, it passes through the quarter-wave plate 204 again, and the circularly polarized light is converted into linearly polarized light. The direction is rotated by 90 degrees to become P-light. At this time, the light will pass through the polarizing reflector 205, leave the lens, and reach the eye 10. It is transmitted through the cornea 101, the pupil 102, and the lens 103, and finally forms an image on the retina 104. At the same time, the light containing P-polarized light, which is transmitted through the negative optical power lens 21 and directed to the polarizing beam splitter 205, passes directly through the surface S203 and enters the human eye. Because the transmitted light power of the composite lens does not match the human eye's vision, it cannot form a clear image on the human eye's retina.

[0081] To eliminate the aforementioned direct-transmission stray light, the linear polarizer and quarter-wave plate can be placed at any position in front of the partial reflective film. That is, they can be placed between the positive power lens 22 and the negative power lens 21, or they can be placed on the environmental side surface (front surface 201) of the positive power lens 22. Of course, not placing the linear polarizer and quarter-wave plate will not affect the user's normal use, because, as mentioned above, the refractive powers corresponding to the two optical paths are different, and the direct-transmission stray light cannot form a normal image in the human eye.

[0082] In the diopter lens provided in this embodiment, the radius of curvature R of surface 202 is... 202 The radius of curvature R of surface 203 is greater than that of surface 203. 203 Large, i.e., R 202 >R 203 Surface 201 can also be made into a surface with angularity and cylindricality to complete AC / A compensation or astigmatism compensation.

[0083] Table 5 shows the optical parameters of the lens in this embodiment. In order to obtain better imaging quality, the surface shape of surface 202 and surface 203 is designed as an aspherical surface in this embodiment. Table 6 shows the corresponding aspherical coefficients.

[0084] Table 5 Optical parameters of the lens in the fifth embodiment

[0085] Surface number Surface type radius of curvature thickness Refractive index Abbe number 201 spherical 140.46 1.8 1.56 68.84 202 aspherical 10395 1.8 1.47 90.26 203 aspherical 114.95

[0086] Table 6. Coefficients of the non-spherical surface in the fifth embodiment.

[0087] surface 202 203 K 1.56e4 -31.25 A4 2.72e-06 2.72e-06 A6 -2.62e-10 2.10e-10

[0088] The equation for the aspherical surface is: Where c is the reciprocal of the radius of curvature, r is the radial distance from a point on the surface, k is the quadratic surface constant, and Ai is the coefficient of higher-order terms.

[0089] In this embodiment, the refractive power achieved by the vision correction optical path of the vision correction lens is -25D, the center thickness of the lens is 3.6mm, and the edge thickness is 5.8mm.

[0090] Sixth Embodiment

[0091] like Figure 6 As shown, the diopter lens provided in this embodiment is a combination of two negative lenses, wherein negative lens 21 is used to realize the refracted optical path and negative lens 23 is used to realize transmission. A partial reflective film is provided on the front surface of negative lens 21, and a quarter-wave plate 204 and a polarizing beam splitter 205 are provided between negative lens 21 and negative lens 23.

[0092] The aforementioned vision correction lens can be used to view displays that emit circularly polarized light, or to view natural light directly. The vision correction optical path of the aforementioned vision correction lens is similar to that of Example 5, and will not be described again here.

[0093] In the vision lens of this embodiment, two negative lenses are combined. The negative lens 23 further corrects the reflected light path, and the surface 203 can also be made into a surface with prismatic aberration and cylindricality to complete AC / A compensation or astigmatism compensation.

[0094] Table 7 shows the optical parameters of the lens in this embodiment:

[0095] Table 7 Optical parameters of the lens in the sixth embodiment

[0096] Surface number Surface type radius of curvature thickness Refractive index Abbe number 201 spherical 150 1.5 1.74 51.30 202 spherical 130 1.5 1.67 53.0 203 spherical 110

[0097] In this embodiment, the optical power achieved by the vision correction optical path of the vision correction lens is -5D, the center thickness of the lens is 3mm, and the edge thickness is 4mm.

[0098] As can be seen from the above embodiments, the vision lens provided in this application can achieve vision matching from low to high prescriptions while keeping the overall thickness of the vision lens relatively thin (thickness less than 10mm). Furthermore, the overall thickness of the vision lens does not differ much regardless of whether it is a low or high prescription lens.

[0099] Seventh Embodiment

[0100] The vision lens 30 provided in this embodiment is made of three lenses of the same size and shape bonded together, including a negative power lens 31 and compensating lenses 32 and 33 located on both sides of the negative power lens 31. Partial reflective films are provided on both sides of the negative power lens 31 to form a reflected light path, and the negative power lens 32 and positive power lens 33 are used as compensating lenses.

[0101] The vision correction optical path of the vision correction lens 30 is as follows: light passes through the front surface 301 and enters the negative lens 32, passes through the intermediate surface 302 and enters the negative lens 31, reaches the intermediate surface 303 and is reflected back to the intermediate surface 302, is reflected by the intermediate surface 302 and passes through the rear surface 303 and enters the positive lens 33, reaches the rear surface 304, at which point the light exits the vision correction lens 30 and reaches the corneal surface 101 of the human eye 10, and is imaged on the retina 104 through the pupil 102 and the lens 103.

[0102] In this embodiment, the radius of curvature R of surface 302 302 The radius of curvature R of surface 303 is greater than that of surface 303. 303 Larger 304 surfaces can also be made with angularity and cylindricity to achieve AC / A compensation or astigmatism compensation.

[0103] Table 8 shows the optical parameters of the lens in this embodiment.

[0104] Table 8 Optical parameters of the lens in the seventh embodiment

[0105] Surface number Surface type radius of curvature thickness Refractive index Abbe number 301 spherical 600 1 1.73 36.72 302 spherical 370 1 1.73 36.72 303 spherical 70 1 1.75 27.64 304 spherical 400

[0106] In this embodiment, a partially reflective film is coated on surfaces 302 and 303, the refractive power of the vision correction optical path is -40D, the center thickness is 3mm, and the edge thickness is 3.45mm.

[0107] In summary, the thin and light-sensitive lens provided by this invention mainly uses the refracting optical path of a negative power lens to achieve vision correction. By introducing two reflective surfaces, the optical power of the refracting surface is reduced, thereby reducing the curvature difference between the front and back surfaces of the lens and reducing the edge thickness of the lens. The edge thickness of the thin and light-sensitive lens can be controlled within 10mm, which is especially suitable for people with high myopia.

[0108] The foregoing has provided a detailed description of the thin and light-sensitive lens and eyeglasses provided by this invention. Any obvious modifications made by those skilled in the art without departing from the essence of this invention will constitute an infringement of the patent rights of this invention and will incur corresponding legal liability.

Claims

1. A light and thin vision lens, characterized in that: it comprises a negative power lens, and a film layer for realizing light splitting is arranged on each of the two side surfaces of the negative power lens; ambient light enters the ambient side surface of the negative power lens, is reflected on the human eye side surface, is reflected again on the ambient side surface, and then exits from the human eye side surface to finally enter the human eye to form an image; the two reflections of the two side surfaces of the negative power lens make part of the ambient light form a turn-back light path in the negative power lens, and the refractive power of a vision correction light path containing the turn-back light path matches the vision of the human eye.

2. The light and thin vision lens according to claim 1, characterized in that: the two side surfaces of the negative power lens are concave towards the human eye.

3. The light and thin vision lens according to claim 2, characterized in that: the film layers arranged on the ambient side surface and the human eye side surface for realizing light splitting are partial reflection films.

4. The light and thin vision lens according to claim 2, characterized in that: the film layer arranged on the ambient side surface for realizing light splitting is a partial reflection film, the film layer arranged on the human eye side surface for realizing light splitting is a first quarter wave plate and a polarization light splitting plate, and the first quarter wave plate is arranged between the negative power lens and the polarization light splitting plate.

5. The light and thin vision lens according to claim 4, characterized in that: a linear polarizing plate and a second quarter wave plate are arranged on the ambient side of the partial reflection film, the second quarter wave plate is arranged between the linear polarizing plate and the partial reflection film, and the polarization transmission direction of the linear polarizing plate is perpendicular to the polarization transmission direction of the polarization light splitting plate.

6. The light and thin vision lens according to any one of claims 1 to 5, characterized in that: it further comprises a compensating lens arranged on the first side and / or the second side of the negative power lens; the adjacent surfaces of the compensating lens and the negative power lens have the same surface shape and are cemented to form a composite lens; and the absolute value of the refractive power of the compensating lens is not greater than 5 D.

7. The light and thin vision lens according to claim 6, characterized in that: the edge thickness and the center thickness of the composite lens are both less than 10 mm.

8. The light and thin vision lens according to any one of claims 1 to 5, characterized in that: the corresponding refractive power of the vision correction light path is selected from -100 D to 0 D; and the see-through refractive power of the negative power lens is selected from -20 D to 0 D.

9. The light and thin vision lens according to claim 8, characterized in that: the corresponding refractive power of the vision correction light path is selected from -100 D to -6 D. A light and thin vision lens according to any one of claims 1 to 9. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10. Eyeglasses, characterized in that: ​

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