Fresnel lens film for vision correction, and optical waveguide lens

Abstract

A Fresnel lens film for vision correction, and an optical waveguide lens. The Fresnel lens film comprises an adhesive layer (1), a film substrate layer (2) and a Fresnel lens layer (3) which are sequentially connected in a thickness direction, wherein the film substrate layer (2) is sequentially divided into a near interpupillary distance section, an intermediate interpupillary distance section and a far interpupillary distance section in a lengthwise direction, and the Fresnel lens layer (3) is disposed on the intermediate interpupillary distance section. The optical waveguide lens comprises a waveguide plate (4), a protective layer (5) and the Fresnel lens film which are sequentially connected in a light emission direction, and the adhesive layer (1) is disposed on the protective layer (5). The Fresnel lens film is configured to be adhered to the side of AR glasses close to human eyes, vision correction can be carried out on the basis of an imaging position and a pupil distance; and the Fresnel lens film has the advantages of a light and thin material, ease of removal and mounting, low cost and good mechanical properties.

Description

Fresnel lens film and optical waveguide lens for vision correction TECHNICAL FIELD

[0001] The present application relates to the technical field of near-eye display devices, and in particular to a Fresnel lens film and an optical waveguide lens for vision correction. BACKGROUND

[0002] As a currently popular virtual sensory interaction technology, augmented reality (AR) and virtual reality (VR) have gradually penetrated into the entertainment, education, medical and other industries. The main platform device for realizing AR / VR technology is a near-eye display (NED). The NED is a glass or goggle type wearable display device composed of a micro display panel and imaging optics. The light emitted by the micro display panel close to the eye is collimated by the imaging optics, thereby forming a virtual image at a distance where the eye can comfortably focus. As a wearable device close to the eye, the NED also needs to have the characteristics of easy wearing, light weight, wide field of view and large eye movement range. In NED display, the optical matching of virtual images and real objects is very important for the natural interaction between the images and the user. However, the conventional AR / VR lenses are designed for people with normal refraction and do not take into account the need for myopia / farsightedness correction. Therefore, it is relatively inconvenient for people who need to wear glasses for vision correction, thereby hindering the popularization and application of NED.

[0003] A prescription lens for smart glasses is disclosed in Chinese Patent No. CN106662759B. The prescription lens is simply attached to the smart glasses by gluing, buckling, magnetic attraction and the like to allow the wearer to clearly see the displayed image and the surrounding environment. Since the existing AR lenses are generally flat optical waveguides without refractive power, they are naturally unable to add myopia / farsightedness / astigmatism correction power. The current general solution is that the AR glasses manufacturer cooperates with the glasses lens manufacturer to add a prescription lens to the far eye side of the glass cover layer through the above-mentioned methods after the user's refraction and lens fitting.

[0004] The above-mentioned prior art has the following disadvantages: (1) the weight of the combination of smart glasses and prescription lenses is relatively large, which affects the wearing experience of the user, and is easily dropped and broken due to the weight of the prescription lenses themselves; (2) the smart glasses and the prescription lenses are bound together, and the smart glasses, the prescription lenses and the combination glasses cannot be selectively used according to the application occasion; (3) after the near-eye display device is updated and iterated, if the user wants to replace the device, the user has to go through the refraction and lens fitting process again in a special glasses store, which is time-consuming and laborious, and the lens fitting price varies from hundreds of yuan to thousands of yuan, thereby hindering the popularization and application of NED.

[0005] The Chinese patent with the authorization publication number CN220019993U discloses a near-eye display module and a near-eye display device, which adopts a holographic waveguide as an optical module. The holographic waveguide uses an ultrathin photosensitive polymer film to replace the prism in the traditional waveguide lens, guides the image light into the human eye, reduces the thickness of the optical module, and inserts and fixes a Fresnel lens between the eyeglass outer frame on the far human eye side and the optical module to achieve the effect of vision correction. Although this way reduces the overall weight of the AR lens, it is not suitable for weight reduction and thinning of the diffractive optical waveguide, and still has problems such as great manufacturing difficulty, difficulty in replacing the Fresnel lens, and high price.

[0006] The Chinese patent with the authorization publication number CN105759424B discloses a head-mounted virtual reality optical system for adjusting diopter with a Fresnel lens, which is based on the light path requirement of the traditional VR glasses, that is, a combination of multiple lenses is used. Using a Fresnel lens to reduce the overall weight is a very popular solution. Products such as PSVR2, Meta quest 2, PICO neo 3, etc. all use the Fresnel lens instead of the ordinary lens solution. The structure of the inherent Fresnel lens in the optical path is changed to match the user's vision correction degree. Although both AR and VR need to be realized through a near-eye display device, since the Fresnel lens is bound to the VR light path, and the Fresnel lens cannot be prefabricated in the AR light path, the vision correction solution of the above VR glasses cannot be simply analogized to the AR solution, and also has problems such as difficulty in replacing the Fresnel lens and high price.

[0007] SUMMARY

[0008] In view of the deficiencies of the prior art, the first object of the present application is to provide a Fresnel lens film for vision correction, which is used for adhering to the near-eye side of an AR glasses and can correct vision according to the imaging position and the pupil distance, and has the advantages of light and thin material, easy disassembly, low price and good mechanical properties.

[0009] The second object of the present application is to provide an optical waveguide lens, which has the advantages of being suitable for users with ametropia and facilitating the popularization and application of AR glasses.

[0010] To achieve the above-mentioned first object, the present application provides the following technical solutions:

[0011] A Fresnel lens film for vision correction, comprising an adhering layer, a film substrate layer and a Fresnel lens layer connected in sequence along the thickness direction, the film substrate layer is divided into a near-pupil distance section, an intermediate-pupil distance section and a far-pupil distance section in sequence along the length direction, and the Fresnel lens layer is arranged on the intermediate-pupil distance section.

[0012] By adopting the technical scheme, compared with the way of fixing the prescription lens on the far human eye side of the AR glasses, inserting the Fresnel lens between the frame and the holographic waveguide on the far human eye side, or adjusting the size of the Fresnel lens in the VR light path, the Fresnel lens film can be detachably connected to the near human eye side of the AR glasses through the adhesive layer to achieve the purpose of vision correction.

[0013] The thickness of the Fresnel lens film is in the order of 100 microns, similar to the thickness of a common mobile phone film, which is much thinner than a common lens, and can achieve the same focusing effect as a common plano-convex / plano-concave lens without affecting the imaging quality.

[0014] The flexible material and adhesive properties of the Fresnel lens film allow users to purchase multiple lenses at once and apply them to the near human eye side of the AR glasses. The parallel light emitted from the waveguide film remains parallel after passing through the protective layer and is focused or diverged after passing through the Fresnel lens film to adapt to the user's correction degree. If replacement is needed, the Fresnel lens film can be removed and replaced with a new one.

[0015] The Fresnel lens film is designed according to the user's degree. For different correction degrees of users, the convex structure and size of the Fresnel lens are different and need to be designed according to the predetermined calculation rules. However, once the fixed degree such as ±50 / 100 / 150 / … / 1000 degrees is pre-designed, mass production can be carried out.

[0016] AR glasses are designed to be universally applicable to all interpupillary distances. That is, in the display area of the light waveguide lens, users can see images regardless of the distance between the pupils. However, different interpupillary distances will change the position of the eye focus on the focal plane, and the configuration of the prescription lens will also be different. Therefore, even if the glasses have the same degree, different interpupillary distances cannot use each other's prescription lenses. The Fresnel lens film of the present application has a Fresnel lens layer in the center of a large film. According to the interpupillary distance information provided by the customer, the near-pupil distance section and / or the far-pupil distance section are cut to match the interpupillary distance.

[0017] Specifically, in the Fresnel lens film of the present application,

[0018] The specific meaning of the "adhesive layer" is a structure that can adhere the Fresnel lens film to the near human eye side of the light waveguide lens through bonding, chemical adsorption, magnetic adsorption, electrostatic adsorption, and / or vacuum adsorption, etc. For example, it can be a hot-melt adhesive sheet, a thermoplastic glue coating, a resin adhesive layer, a chemical medium coating, a light-cured resin coating, an electrostatic adsorption layer, and / or a vacuum chuck, etc.

[0019] The specific meaning of the "thin film substrate layer" refers to a transparent sheet made of plastic, adhesive, rubber or other materials, which can be, for example but not limited to, an optical film, a composite film, a superconducting film, a polyester film, a nylon film, and / or a plastic film, etc.

[0020] The specific meaning of the "Fresnel lens layer" refers to a threaded lens formed by pressing a pressing material, the surface of which close to the thin film substrate layer is approximately a smooth plane, and the other surface is pressed to form a concentric circle structure to complete the adjustment of light, which can be, for example but not limited to, a positive Fresnel lens or a negative Fresnel lens; in terms of material, it can be a thermosetting resin or a photocurable resin, and the Fresnel lens layer can be, for example but not limited to, a combination of one or more of polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyamide (PA), and polystyrene (PS).

[0021] Further, the thickness of the Fresnel lens film is 100-500 μm; wherein the thickness of the thin film substrate layer is 100-300 μm, and the thickness of the Fresnel lens layer is not more than 1 μm.

[0022] Further, the Fresnel lens layer includes a plurality of annular units arranged in a concentric circular array, each annular unit including a plurality of pixel rings arranged in a concentric circular array, and the connecting lines between the top surfaces of the plurality of pixel rings are in the form of an arc, so that the top surface of the annular unit is approximately in the form of an annular curved surface, and the radii of curvature of the annular curved surfaces of the plurality of annular units are set one by one corresponding to the predetermined radii of curvature for vision correction.

[0023] Further, the plurality of annular units are arranged spaced apart from each other along the radial direction and / or arranged connected to each other along the radial direction.

[0024] Further, the plurality of pixel rings are arranged spaced apart from each other along the radial direction and / or arranged connected to each other along the radial direction.

[0025] Further, the thickness of the pixel ring is not more than 1 μm, and the width is not more than 1 μm.

[0026] Further, the cross section of the pixel ring is in the form of a rectangle.

[0027] In order to simplify the design method of the Fresnel lens layer for vision correction, the present application determines the predetermined curvature radius of the concave lens or convex lens for vision correction based on the spherical coefficient and aspherical coefficient, divides the lens into pixel blocks, i.e. subsequent ring element regions, and then divides the pixel ring into pixel points, i.e. subsequent pixel ring regions; if the lens thickness at the position of the pixel point is not more than 1 μm, the height of the pixel ring is designed according to the current lens thickness; if h is more than 1 μm, the height of the pixel ring is designed based on the lens thickness minus the integer multiple of 1 μm, so as to ensure that the thickness of the cover ring element is between 0 and 1 μm, thereby dividing the Fresnel lens layer, which is simple to process.

[0028] Further, the preparation process of the Fresnel lens film comprises,

[0029] S1 plating, laser processing is performed on the surface of the mask plate to form the same pattern region as the surface of the Fresnel lens layer, and then the mask plate is continuously electroplated to form a nickel layer in the non-pattern region, which can be embedded with the surface of the Fresnel lens layer to obtain a master plate;

[0030] S2 gluing, a base film is obtained by compounding an adhesion layer and a film substrate layer, and then the base film is continuously passed through a coating device to uniformly coat a thermosetting resin or a light-curing resin on the surface of the film substrate layer away from the adhesion layer to obtain a resin layer;

[0031] S3 transfer printing, the master plate obtained in S1 is wrapped around a plate roller, and the base film obtained in S2 passes through the master plate on the plate roller to form the same pattern region as the surface of the Fresnel lens layer on the surface of the resin layer, and then the structure is solidified by heat curing or light curing to obtain the Fresnel lens layer;

[0032] S4 cutting to obtain the Fresnel lens film.

[0033] In this process, the base film is placed between two supporting rollers with a plate roller in the middle. The gluing process is completed before the film enters the plate roller, and after being imprinted by the master plate on the plate roller, the imprinted structure is solidified by heat curing or light curing, etc. to obtain the corresponding structure. The advantage of this method is that the master plate periodically rolls on the plate roller, which can continuously and uninterruptedly manufacture, thus the cost is very low, and the manufacturing cost of each Fresnel lens film can be reduced to the level comparable to that of a mobile phone film, which is much lower than that of ordinary myopia / hyperopia prescription lenses. This advantage is complementary to the "replaceable" advantage - when the cost of myopia / hyperopia lenses is very low, users can completely replace, transfer, etc. AR glasses without any burden, which paves the way for the popularization of AR glasses.

[0034] To achieve the above-mentioned second object, the present application provides the following technical solutions:

[0035] An optical waveguide lens comprises a waveguide sheet, a protective layer and the Fresnel lens film connected in sequence along the light exit direction, and the adhesive layer is arranged on the protective layer.

[0036] In summary, the beneficial technical effects of the present application are:

[0037] 1. An AR eyeglass combination lens structure suitable for myopia / hyperopia or other people who need to correct vision is proposed, and a roll-to-roll processing method is provided. For people who need to correct vision, there is no longer a combination of heavy and expensive AR eyeglasses + myopia / hyperopia / astigmatism lenses, but only a light and inexpensive Fresnel lens film is attached to the near-eye side of the AR eyeglasses, which is convenient to install and replace. For the Fresnel lens film, a roll-to-roll method is used for processing, which greatly reduces the cost.

[0038] 2. The thickness of the Fresnel lens film is in the order of hundreds of microns (100-500 microns), which can be made of resin, plastic and other materials. A large number of lenses with fixed myopia / hyperopia / astigmatism degrees are designed and manufactured in advance for users to choose and purchase.

[0039] 3. Unlike the Fresnel lens in the VR field, the Fresnel lens is not pre-made in the AR optical waveguide and lens, and is not a necessary component of the optical path, but is made in the form of a film, which is purchased and attached to the near-eye side of the glass cover layer outside the AR optical waveguide by the user according to his own characteristics.

[0040] 4. Large-size Fresnel lens films are manufactured, and different users with different pupil distances are cut to match their pupil distances.

[0041] 5. The roll-to-roll method is used to manufacture the Fresnel lens film, which greatly reduces the cost, reduces the difficulty of manufacturing and application, and reduces the product price, which is more conducive to product promotion. BRIEF DESCRIPTION OF DRAWINGS

[0042] FIG. 1 is a cross-sectional structure schematic diagram of the Fresnel lens film of the embodiment 1 of the present application.

[0043] FIG. 2 is a schematic diagram of the connection relationship between the film substrate layer and the Fresnel lens layer of the embodiment 1 of the present application.

[0044] FIG. 3 is a partial structure schematic diagram of the Fresnel lens layer of the embodiment 2 of the present application.

[0045] FIG. 4 is a cross-sectional structure schematic diagram of the Fresnel lens layer of the embodiment 2 of the present application.

[0046] FIG. 5 is a flowchart of preparing the Fresnel lens film of the embodiment 3 of the present application.

[0047] FIG. 6 is a structure schematic diagram of the optical waveguide lens of the embodiment 4 of the present application.

[0048] In the figure, 1, adhesive layer; 2, film substrate layer; 3, Fresnel lens layer; 31, ring unit; 311, pixel ring; 4, waveguide sheet; 5, protective layer. DETAILED DESCRIPTION

[0049] In order to make the technical means, creative features, purposes and effects of the present application more clear and easy to understand, the present application is further described below in combination with the drawings and specific embodiments.

[0050] Embodiment 1: Referring to FIG. 1 and FIG. 2, a Fresnel lens film for vision correction disclosed by the present application includes an adhesive layer 1, a film substrate layer 2 and a Fresnel lens layer 3 connected in sequence along the thickness direction, which is used to adhere to the near eye side of AR glasses and can correct vision according to the imaging position and pupil distance, has the advantages of light and thin material, easy to disassemble, low price and good mechanical properties. The following structure is preferably adopted to realize it:

[0051] The adhesive layer 1 is a resin adhesive layer, which can be pasted on the near eye side of AR glasses by adhesive fixation;

[0052] The film substrate layer 2 is a transparent optical film, which is divided into a near-pupil distance section, an intermediate-pupil distance section and a far-pupil distance section in sequence along the length direction, and the Fresnel lens layer 3 is arranged on the intermediate-pupil distance section;

[0053] The Fresnel lens layer 3 is a threaded lens made of polymethyl methacrylate injection, the surface of its side close to the film substrate layer 2 is approximately a smooth plane, the surface of its other side is imprinted with a concentric circle structure, and has a plurality of curvature radii corresponding to the predetermined curvature radius for vision correction, to complete the adjustment of light;

[0054] In addition, the thickness of the Fresnel lens film is 500 μm; wherein the thickness of the film substrate layer 2 is 300 μm, and the thickness of the Fresnel lens layer 3 is not more than 1 μm.

[0055] Compared with the way of fixing the prescription lens on the far eye side of AR glasses, inserting the Fresnel lens between the frame and the holographic waveguide on the far eye side, or adjusting the size of the Fresnel lens in the VR light path, the present application can detachably connect the Fresnel lens film to the near eye side of AR glasses through the adhesive layer 1 to achieve the purpose of vision correction; wherein,

[0056] The thickness of the Fresnel lens film is in the order of hundreds of microns, similar to the thickness of ordinary mobile phone film, which can be made thinner than ordinary lenses, achieve the same focusing effect as ordinary plano-convex / plano-concave lenses, and almost have no effect on the imaging quality;

[0057] The film flexible material and the adherable property of the Fresnel lens film make the user can purchase multiple ones according to his own vision, and stick them on the near eye side of the AR glasses. The parallel light emitted from the waveguide sheet 4 is still parallel light after passing through the protection layer 5, and is focused or diverged after passing through the Fresnel lens film, so as to adapt to the user's correction degree. If replacement is needed, the Fresnel lens film is removed, and a new Fresnel lens film is replaced;

[0058] The Fresnel lens film is convenient to design according to the user's degree. For different correction degrees of the user, the convex structure and size of the Fresnel lens are different, and need to be designed according to the predetermined calculation rule. However, once the fixed degree such as ±50 / 100 / 150 / … / 1000 degrees is designed in advance, mass production can be carried out.

[0059] The AR glasses are designed to be universal for all pupil distances, that is, in the display area of the light waveguide lens sheet, the user can see the image regardless of the near or far pupil distance. However, the different pupil distances will cause the position of the eye focus point on the focal plane to change, and the configuration of the corresponding prescription lens is different. Therefore, even if the glasses degrees are the same, different pupil distances cannot use each other's prescription lenses. The Fresnel lens film of the present application manufactures the Fresnel lens layer 3 at the center position of a larger film, and according to the pupil distance information provided by the customer, the near pupil distance section and / or the far pupil distance section are cut to match the pupil distance.

[0060] Embodiment 2: Referring to FIGS. 3 and 4, the Fresnel lens film for vision correction disclosed by the present application is different from embodiment 1 in that the Fresnel lens layer 3 includes a plurality of annular units 31 arranged in a concentric circular array and spaced apart from each other along the radial direction. Each annular unit 31 includes a plurality of pixel rings 311 arranged in a concentric circular array and connected to each other along the radial direction. The connecting lines between the top surfaces of the plurality of pixel rings 311 are in arc shape, so that the top surface of the annular unit 31 is approximately in annular curved surface, and the curvature radii of the annular curved surfaces of the plurality of annular units 31 are set one by one corresponding to the predetermined curvature radii for vision correction. The thickness of the pixel ring 311 is not more than 1 μm, and the width is not more than 1 μm. The cross section of the pixel ring 311 is in rectangular shape.

[0061] Take the Fresnel lens film for 500 degrees myopia correction as an example, the area of the Fresnel lens film is 15mmx15mm, the focal point is in the center of the picture, the human eye is located after the focal point, and the distance between the two lenses is determined according to the pupil distance of the human eye. The Fresnel lens film is composed of different thickness rectangular pixel rings 311 formed on a 300μm thick film, and the thickness of the pixel ring 311 is not more than 1μm. In Figure 3, black is low, and the whiter the higher, the highest 1μm. Figure 4 is a schematic view of the structure of the ring-shaped unit 31 on the surface of the Fresnel lens film. Each ring-shaped unit 31 is composed of a rectangular pixel ring 311, the width of which is not more than 1μm, but each ring-shaped unit 31 does not only occupy one pixel, as shown in the central black area of Figure 3, which is in millimeter level, and the horizontal and vertical are thousands of pixels, and the vertical height is between 0-1μm.

[0062] Embodiment 3: Referring to Figure 5, a Fresnel lens film for vision correction disclosed by the present application is different from that of embodiment 2 in that the preparation process of the Fresnel lens film comprises,

[0063] S1 plating, first laser processing is performed on the surface of the mask plate to form the same pattern area as the surface of the Fresnel lens layer 3, and then the mask plate is continuously electroplated to form a nickel layer in the non-pattern area, which can be embedded with the surface of the Fresnel lens layer 3 to obtain a master plate;

[0064] S2 glueing, first, the adhesive layer 1 and the film substrate layer 2 are compounded to obtain a base film, and then the base film is continuously passed through the coating equipment to uniformly coat polymethyl methacrylate on the surface of the film substrate layer 2 away from the adhesive layer 1 to obtain a resin layer;

[0065] S3 transfer printing, first, the master plate obtained in S1 is wrapped around the plate roller, and then the base film obtained in S2 is passed through the master plate on the plate roller to press the surface of the resin layer to form the same pattern area as the surface of the Fresnel lens layer 3, and then it is cured by light to obtain the Fresnel lens layer 3;

[0066] S4 cutting, to obtain the Fresnel lens film.

[0067] In the process, the base film is placed between two supporting rollers, with a plate roller in between. The gluing process is completed before the film enters the plate roller, and after being imprinted by the master plate on the plate roller, the imprinted structure is solidified through processes such as heat curing or light curing, and the corresponding structure is obtained. The advantage of this method is that the master plate periodically rolls on the plate roller, which can continuously and uninterruptedly manufacture, thus the cost is very low, and the manufacturing cost of each Fresnel lens film can be reduced to a level comparable to that of a mobile phone sticker, which is much lower than that of ordinary myopia / hyperopia prescription lenses. This advantage complements the "replaceable" advantage - when the cost of myopia / hyperopia lenses is very low, users can completely replace AR glasses, transfer, etc. without any burden, which paves the way for the promotion of AR glasses.

[0068] Example 4: Referring to FIG. 6, the optical waveguide lens disclosed by the present application is different from that of Example 3 in that it comprises a waveguide sheet 4, a protective layer 5 and the above-mentioned Fresnel lens film connected in sequence along the light exit direction, and the adhesive layer 1 is arranged on the protective layer 5.

[0069] Example 5: The performance of the optical waveguide lens of Example 4 is detected, and the detection results are shown in Table 1. Among them,

[0070] 1. Observe the surface defects of the waveguide sheet and the protective layer by the human eye assisted by a back-illuminated light source;

[0071] 2. Measure the transmission, reflection and scattering of the optical waveguide lens by a spectrophotometer and a haze meter;

[0072] 3. Test the imaging quality of the optical waveguide lens (including but not limited to clarity, distortion, brightness and chroma uniformity, stray light, etc.) by an imaging brightness meter;

[0073] 4. Detect the difference between the actual pupil distance and the nominal pupil distance of the optical waveguide lens after fitting by a pupil distance ruler;

[0074] 5. Detect whether the top power of the optical waveguide lens meets the national standard by a 0.01 sensitivity;

[0075] 6. After marking the center, detect the horizontal and vertical differences of the optical center of the optical waveguide lens;

[0076] 7. Detect whether there is a gap or looseness after the lens is fitted.

[0077] Table 1

[0078] From Table 1, it can be seen that the original top power 0.0D of the optical waveguide lens is changed to -5.0D after the film Fresnel lens is attached, which is suitable for 500 degree myopia people to wear, and the difference between the attached pupil distance and the actual pupil distance is not more than 0.1mm, the optical center difference is small, and no ghost appears, which meets the design requirements. Among them, the optical center horizontal and vertical difference and the assembly condition are measured according to the national standard GB10810.1-2005, and the top power is measured according to the national standard GB17341-1998. In addition, the top power of the optical waveguide lens corresponds to the refractive power of the eye, such as the top power -5.0D of the glasses adapted to the refractive power -5.0D of the eye, that is, the 500 degree myopia as people commonly say, and if the special conditions such as astigmatism need to be adapted, it should also meet the national standard GB17341-1998, and increase the measurement items such as "cylinder" to adapt to the special conditions.

[0079] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A Fresnel lens film for vision correction, characterized in that: The device comprises an adhesive layer (1), a film substrate layer (2), and a Fresnel lens layer (3) connected in sequence along a thickness direction; the film substrate layer (2) is sequentially divided into a near pupil distance section, an intermediate pupil distance section, and a far pupil distance section along a length direction; and the Fresnel lens layer (3) is arranged on the intermediate pupil distance section.

2. The Fresnel lens film for vision correction according to claim 1, characterized in that: The adhesive layer (1) is a hot melt adhesive sheet, a thermoplastic glue coating, a resin adhesive layer, a chemical medium coating, a light-curing resin coating, an electrostatic adsorption layer, and / or a vacuum suction cup.

3. The Fresnel lens film for vision correction according to claim 1, characterized in that: The film substrate layer (2) is an optical film, a composite film, a superconducting film, a polyester film, a nylon film, and / or a plastic film.

4. The Fresnel lens film for vision correction according to claim 1, characterized in that: The Fresnel lens layer (3) is composed of thermosetting resin or light-curing resin.

5. The Fresnel lens film for vision correction according to claim 1, characterized in that: The Fresnel lens layer (3) is composed of polymethyl methacrylate, polycarbonate, polyvinyl chloride, polyethylene terephthalate, polyamide, and / or polystyrene.

6. The Fresnel lens film for vision correction according to claim 1, characterized in that: The thickness of the Fresnel lens film is 100-500 μm; wherein the thickness of the film substrate layer (2) is 100-300 μm, and the thickness of the Fresnel lens layer (3) does not exceed 1 μm.

7. The Fresnel lens film for vision correction according to claim 1, characterized in that: The Fresnel lens layer (3) comprises a plurality of annular units (31) arranged in a concentric array, each annular unit (31) comprises a plurality of pixel rings (311) arranged in a concentric array, the connecting lines between the top surfaces of the plurality of pixel rings (311) are arc-shaped, so that the top surfaces of the annular units (31) are approximately annular curved surfaces, and the curvature radii of the annular curved surfaces of the plurality of annular units (31) are set in one-to-one correspondence with predetermined curvature radii for vision correction.

8. The Fresnel lens film for vision correction according to claim 7, characterized in that: The cross section of the pixel ring (311) is rectangular.

9. The Fresnel lens film for vision correction according to claim 1, characterized in that: The preparation process of the Fresnel lens film includes: S1 plate making, firstly performing laser processing on the surface of the mask plate and forming a pattern area identical to the surface of the Fresnel lens layer (3), then continuing electroplating on the mask plate and forming a nickel layer in the non-pattern area, wherein the nickel layer can be embedded with the surface of the Fresnel lens layer (3) to obtain a master plate; S2 coating, first compounding the adhesive layer (1) and the film substrate layer (2) to obtain a base film, and then continuously passing the base film through a coating device to uniformly coat a thermosetting resin or a light-curing resin on the surface of the film substrate layer (2) facing away from the adhesive layer (1) to obtain a resin layer; S3 transfer printing, first wrapping the master obtained in S1 on a plate roller, then passing the base film obtained in S2 through the master on the plate roller to form a pattern area on the surface of the resin layer that is the same as the surface of the Fresnel lens layer (3), and then performing thermal curing or light curing to obtain the Fresnel lens layer (3); S4 cutting to obtain Fresnel lens film.

10. An optical waveguide lens, characterized in that: It comprises a waveguide plate (4), a protective layer (5) and a Fresnel lens film according to any one of claims 1 to 9, which are sequentially connected along the light emitting direction, wherein the adhesive layer (1) is arranged on the protective layer (5).

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