CN114690284A

CN114690284A - Integrated lens, preparation method thereof and augmented reality equipment

Info

Publication number: CN114690284A
Application number: CN202210334766.8A
Authority: CN
Inventors: 叶万俊
Original assignee: Hangzhou Douku Software Technology Co Ltd
Current assignee: Hangzhou Douku Software Technology Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-01

Abstract

The application provides an integrated lens, a preparation method thereof and augmented reality equipment. The integrated lens comprises a plurality of lenses arranged in sequence along the direction of an optical axis: a first lens having a negative optical power or an optical power of 0; an optical waveguide assembly; and a second lens having a negative optical power. The integrated lens of the embodiment of the application integrates the functions of a near vision lens and an optical waveguide and can be made thinner.

Description

Integrated lens, preparation method thereof and augmented reality equipment

Technical Field

The application relates to the field of electronics, in particular to an integrated lens, a preparation method of the integrated lens and augmented reality equipment.

Background

As augmented reality technology matures more and more, augmented reality devices, such as augmented reality glasses (AR glasses), are used more and more frequently in daily life. In addition, the proportion of the near-sighted number of people of ball improves greatly nowadays, and the demand of near-sighted correction increases greatly, however, current augmented reality equipment's lens only has the optical waveguide piece usually, to near-sighted user, needs the cooperation glasses just can use, has seriously influenced user experience.

Disclosure of Invention

In view of the above problems, embodiments of the present application provide an integrated lens that integrates a near vision lens function and an optical waveguide function, and can be made thinner.

This application first aspect provides an integrated lens, integrated lens has the optical axis, and it includes that it arranges in proper order along the optical axis direction:

a first lens having a negative optical power or an optical power of 0;

an optical waveguide assembly; and

a second lens having a negative optical power.

A second aspect of the present application provides a method for preparing an integrated lens, comprising:

providing an optical waveguide assembly having first and second oppositely disposed surfaces;

injecting a first thermosetting resin glue solution into the first surface of the optical waveguide component, and injecting a second thermosetting resin glue solution into the second surface of the optical waveguide component; and

and curing the first thermosetting resin glue solution to form a first lens, and curing the second thermosetting resin glue solution to form a second lens, wherein the first lens has negative focal power or the focal power of the first lens is 0, and the second lens has negative focal power.

A third aspect of the present application provides an augmented reality device, including:

the projection optical machine comprises a display and a lens, wherein the display is used for emitting optical signals, and the lens is arranged on the display surface of the display and is used for modulating the optical signals; and

the integrated lens of the embodiment of the application, the integrated lens set up in one side that the camera lens deviates from the display is used for will through the light signal transmission after the camera lens modulation.

The integrated lens of the embodiment of the application has the advantages that the first lens and the second lens with negative focal power are integrated with the optical waveguide component, so that the integrated lens integrates the near vision function and the augmented reality function (AR). In addition, the first lens and the second lens are positioned on two opposite sides of the optical waveguide component, so that the optical waveguide component can be well protected, and the optical waveguide component is not easy to damage even when falling. Moreover, through the combination of two lenses with negative focal power, the diopter correction range is wider, the device can be applicable to more extensive myopes, has thinner thickness and smaller volume, and is more attractive when being applied to augmented reality equipment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an integrated lens according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of an integrated lens of an embodiment of the present application along the direction a-a in fig. 1.

Fig. 3 is a schematic cross-sectional view of an integrated lens of another embodiment of the present application along the direction a-a in fig. 1.

Fig. 4 is a schematic structural diagram of an optical waveguide assembly according to an embodiment of the present application.

Fig. 5 is a schematic structural view of an optical waveguide sheet according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of an optical waveguide assembly according to yet another embodiment of the present application.

Fig. 7 is a schematic cross-sectional view of an integrated lens of another embodiment of the present application along the direction a-a in fig. 1.

Fig. 8 is a schematic flow chart of a method of making an integrated lens according to an embodiment of the present application.

Fig. 9 is a schematic flow chart of a method of making an integrated lens according to yet another embodiment of the present application.

Fig. 10 is a schematic diagram of the fabrication of an integrated lens according to an embodiment of the present application.

FIG. 11 is a schematic cross-sectional view of an integrated lens of the present application along the line A-A in FIG. 1.

Fig. 12 is a schematic cross-sectional view of an integrated lens of another embodiment of the present application along the direction a-a in fig. 1.

Fig. 13 is a schematic structural view of an optical waveguide assembly according to yet another embodiment of the present application.

Fig. 14 is a schematic structural view of an optical waveguide assembly according to yet another embodiment of the present application.

FIG. 15 is a schematic cross-sectional view of an integrated lens of the present application along the line A-A in FIG. 1 according to yet another embodiment.

Fig. 16 is a schematic flow chart of a method of making an integrated lens according to an embodiment of the present application.

Fig. 17 is a schematic flow chart of a method of making an integrated lens according to yet another embodiment of the present application.

Fig. 18 is a schematic structural view of the preparation of an integrated lens according to yet another embodiment of the present application.

Fig. 19 is a schematic structural diagram of an augmented reality device according to an embodiment of the present application.

Fig. 20 is a schematic structural diagram of an augmented reality device according to another embodiment of the present application.

Fig. 21 is a circuit block diagram of an augmented reality device according to an embodiment of the present application.

Fig. 22 is a schematic structural diagram of an augmented reality device according to still another embodiment of the present application.

Description of reference numerals:

100-integrated lens, 10-first lens, 11-first light incident surface, 13-first light emitting surface, 30-optical waveguide component, 31-first protection sheet, 311-first surface, 313-third surface, 33-optical waveguide sheet, 330-body part, 331-coupling grating, 333-coupling grating, 335-turning grating, 35-second protection sheet, 351-second surface, 3511-incident region, 37-first antireflection film, 39-second antireflection film, 50-second lens, 51-light-passing hole, 70-third antireflection film, 90-fourth antireflection film, 10 '-positioning support, 30' -casting mold, 20-packaging layer, 40-lens, 101-containing space, 700-augmented reality device, 710-projection light machine, 711-display, 713-lens, 730-processor, 750-memory, 760-power supply module, 770-housing, 790-wearing piece, 791-first wearing piece, 793-second wearing piece.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present application, and a detailed description of the like parts is omitted in different embodiments for the sake of brevity.

Referring to fig. 1 and fig. 2, the present application provides an integrated lens 100, the integrated lens 100 has an optical axis (as shown by a dotted line O-O in fig. 2), the integrated lens 100 includes: a first lens 10, the first lens 10 having a negative power; an optical waveguide assembly 30; and a second lens 50, the second lens 50 having a negative power.

Alternatively, the direction of the optical axis is parallel to the stacking direction of the first lens 10, the optical waveguide assembly 30, and the second lens 50.

The integrated lens 100 of the embodiment of the present application, the first lens 10 and the second lens 50 with negative focal power are integrated with the optical waveguide assembly 30, so that the integrated lens 100 combines a near vision function and an augmented reality function (AR). In addition, the first lens 10 and the second lens 50 are located at two opposite sides of the optical waveguide assembly 30, so that the optical waveguide assembly 30 can be well protected and is not easily damaged even when the optical waveguide assembly is dropped. Moreover, through the combination of two lenses with negative focal power, the diopter correction range is wider, the optical lens can be suitable for more extensive myopes, has thinner thickness and smaller volume, and is more attractive when being applied to augmented reality equipment.

In some embodiments, the first lens 10, the optical waveguide assembly 30, and the second lens 50 are sequentially attached to each other, the first lens 10, the optical waveguide assembly 30, and the second lens 50 are an integral structure, an outer periphery of the first lens 10 is connected to an outer periphery of the second lens 50, and the optical waveguide assembly 30 is enclosed in the accommodating space 101 enclosed by the first lens 10 and the second lens 50. The integrated lens 100 is thinner and lighter due to the integrated structure of the first lens 10, the optical waveguide component 30 and the second lens 50, and the outer periphery of the first lens 10 is connected with the outer periphery of the second lens 50, so that the optical waveguide component 30 can be wrapped in the accommodating space 101 enclosed by the first lens 10 and the second lens 50, the optical waveguide component 30 can be better protected, and the optical waveguide component 30 is prevented from being damaged in the using process.

In some embodiments, the junction of the first lens 10 and the second lens 50 does not have a phase interface; in other words, the first lens element 10 and the second lens element 50 are formed in the same process. Alternatively, the first lens 10 and the second lens 50 have the same raw material composition. The first lens 10 and the second lens 50 can be formed in the same process by using the same raw material composition by casting or the like. This can make the first lens 10 and the second lens 50 have better integration, and can better simplify the manufacturing process.

In some embodiments, the integrated lens 100 can correct a range of near vision power De of 50 ≦ De ≦ 1400. Specifically, the myopic degree De that the integrated lens 100 can correct may be, but is not limited to, 50 °, 75 °, 100 °, 125 °, 150 °, 175 °, 200 °, 225 °, 250 °, 275 °, 300 °, 325 °, 350 °, 375 °, 400 °, 425 °, 450 °, 475 °, 500 °, 525 °, 550 °, 575 °, 600 °, 625 °, 650 °, 675 °, 700 °, 725 °, 750 °, 775 °, 800 °, 825 °, 850 °, 875 °, 900 °, 925 °, 950 °, 975 °, 1000 °, 1025 °, 1050 °, 1075 °, 1100 °, 1125 °, 1150 °, 1175 °, 1200 °, 1225 °, 1250 °, 1275 °, 1300 °, 1325 °, 1350 °, 1375 °, 1400 °, etc. Therefore, the integrated lens 100 of the present application has a wide application range, and can be applied to patients with various myopic degrees.

Alternatively, the myopic power De1 correctable by the first lens 10 may range from 25 DEG-De 1-600 deg. Specifically, the myopic degree De1 that the integrated lens 100 can correct may be, but is not limited to, 25 °, 50 °, 75 °, 100 °, 125 °, 150 °, 175 °, 200 °, 225 °, 250 °, 275 °, 300 °, 325 °, 350 °, 375 °, 400 °, 425 °, 450 °, 475 °, 500 °, 525 °, 550 °, 575 °, 600 °, and the like.

Optionally, the second lens 50 can correct for myopia powers De2 in the range of 25 DEG De2 DEG 800 deg. Specifically, the myopic degree De2 that the integrated lens 100 can correct may be, but is not limited to, 25 °, 50 °, 75 °, 100 °, 125 °, 150 °, 175 °, 200 °, 225 °, 250 °, 275 °, 300 °, 325 °, 350 °, 375 °, 400 °, 425 °, 450 °, 475 °, 500 °, 525 °, 550 °, 575 °, 600 °, 625 °, 650 °, 675 °, 700 °, 725 °, 750 °, 775 °, 800 °, and the like.

The De of the myopic power that the integrated lens 100 can correct can be calculated by the following formula: de × (N1+ N2-d × N1 × N2), where N1 is the diopter of the first lens 10, N2 is the diopter of the second lens 50, and d is the distance d between the optical center of the first lens 10 and the optical center of the second lens 50. For example, when N1 is-4 m^-1，N2＝-0.5m^-1When d is 0.001m, De is 100 x (-4 m)^-1-0.5m^-1-4×0.5×0.001m^-1)＝450.2°。

In some embodiments, the focal length f of the integrated lens 100 is in the range of-4 m ≦ f ≦ -1/14 m. Specifically, the focal length of the integrated lens 100 can be, but is not limited to, -4m, -2m, -1m, -2/3m, -0.5m, -1/3m, -1/4m, -1/5m, -1/6m, -1/7m, -1/8m, -1/9m, -1/10m, -1/11m, -1/12m, -1/13m, -1/14m, and the like. The larger the focal length of the integrated lens 100 (i.e., the smaller the absolute value of the focal length), the higher the amount of myopia that can be corrected.

In some embodiments, the distance d between the optical center of the first lens 10 and the optical center of the second lens 50 ranges from 0.5mm ≦ d ≦ 5 mm. Specifically, the distance d between the optical center of the first lens 10 and the optical center of the second lens 50 may be, but is not limited to, 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.7mm, 1.9mm, 2.1mm, 2.3mm, 2.5mm, 2.8mm, 3.0mm, 3.3mm, 3.5mm, 3.8mm, 4.0mm, 4.3mm, 4.5mm, 4.8mm, 5mm, and the like. The smaller the distance d between the optical center of the first lens 10 and the optical center of the second lens 50, the better, the more beneficial to the lightening and thinning of the integrated lens 100, but when d is too small, the myopia degree range that the integrated lens 100 can correct is too small, which affects the user range of the integrated lens 100, but when d is too large, the less beneficial to the lightening and thinning of the integrated lens 100 is.

The term "optical center" in this application refers to a point on a lens through which a light ray in any direction passes, and the propagation direction of the light ray is unchanged, i.e. the outgoing direction and the incoming direction are parallel to each other, which is called the optical center of the lens.

In some embodiments, the first lens 10 has a first light incident surface 11 and a first light emitting surface 13 disposed opposite to each other, and the first light emitting surface 13 is attached to the optical waveguide assembly 30.

Optionally, the first light incident surface 11 is a convex surface; in other words, the first light incident surface 11 protrudes in a direction away from the first light emitting surface 13. Optionally, the first light emitting surface 13 is a concave surface; in other words, the first light emitting surface 13 is concave toward the first light incident surface 11. In one embodiment, the first light incident surface 11 is a spherical surface, and the first light emitting surface 13 is also a spherical surface.

Optionally, the radius of curvature of the first light incident surface 11 is greater than the radius of curvature R2 of the first light exit surface 13. Optionally, the range of the curvature radius R2 of the first light emitting surface 13 is 0.14m ≦ R2 ≦ 2.8 m. Specifically, the curvature radius R2 of the first light emitting surface 13 may be, but is not limited to, 0.14m, 0.3m, 0.5m, 0.7m, 1.0m, 1.2m, 1.4m, 1.6m, 1.8m, 2.0m, 2.2m, 2.4m, 2.6m, 2.8m, and the like. The smaller the curvature radius R2 of the first light emitting surface 13, the higher the approximation power that the first lens 10 can correct.

Optionally, the first lens 10 is a resin lens, and a material of the first lens 10 includes a first thermosetting resin. The first thermosetting resin includes at least one of polydiethylene glycol, polydiallyl glycol carbonate, polyallyl diglycol carbonate, polypropylene glycol, poly 1, 3-butylene glycol methacrylate, polyallyl methacrylate, polyethoxymethyl methacrylate, polyurethane, and the like. The first lens 10 made of a thermosetting resin has a lighter weight than a glass lens, and the integrated lens 100 can be made lighter. In addition, compared with a thermoplastic resin and a thermosetting resin, the temperature for preparing the first lens 10 is lower, the residual stress after cooling is smaller (i.e. high thermal stress does not exist), and the obtained first lens 10 is less prone to deformation and has better optical performance. Compared with a photo-curing resin (i.e., a resin polymerized by a photoinitiator), the first lens 10 is not easily yellowed after a certain period of time of use due to the thermosetting resin, and the photo-curing resin is easily left with the photoinitiator, which absorbs ultraviolet rays and is easily yellowed after a certain period of time of use, thereby affecting the light transmittance of the integrated lens 100.

Alternatively, the light transmittance T1 of the first lens 10 ranges from T1 ≧ 90%. Further, the light transmittance T1 of the first lens 10 is in the range of T1 ≥ 95%. Specifically, the light transmittance T1 of the first lens 10 may be, but is not limited to, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5%, etc. The higher the light transmittance of the first lens 10, the better the optical performance of the resulting integrated optic 100.

Referring to fig. 3 and fig. 4, the optical waveguide assembly 30 has a first surface 311 and a second surface 351 opposite to each other, the first surface 311 is attached to the first light emitting surface 13, and the second surface 351 is attached to the second lens 50 facing the surface of the optical waveguide assembly 30.

In some embodiments, the optical waveguide assembly 30 includes a first protective sheet 31, an optical waveguide sheet 33, and a second protective sheet 35, which are sequentially disposed at intervals, the first protective sheet 31 being disposed closer to the first lens 10 than the second protective sheet 35; in other words, the second protective sheet 35 is disposed closer to the second lens 50 than the first protective sheet 31, and the optical waveguide sheet 33 is used to transmit the optical signal incident to the optical waveguide sheet 33 and perform one-dimensional or two-dimensional pupil expansion on the image information in the optical signal. That is, the optical waveguide assembly 30 includes a first protective sheet 31, an optical waveguide sheet 33, and a second protective sheet 35, the optical waveguide sheet 33 is disposed at an interval on one side of the first protective sheet 31, the second protective sheet 35 is disposed at an interval on a surface of the optical waveguide sheet 33 facing away from the first protective sheet 31, and the second protective sheet 35 is disposed facing away from the first lens 10 compared to the first protective sheet 31. When a person skilled in the art thinks that the myopia lens is integrated with the optical waveguide sheet 33, it is usually considered to directly arrange or form the myopia lens on the optical waveguide sheet 33 by injection molding, however, since the strength of the optical waveguide sheet 33 is generally poor, the direct arrangement or formation of the myopia lens may not only damage the grating structure (such as coupling-in grating, coupling-out grating, etc.) or the reflector structure on the surface of the optical waveguide sheet 33, but also the formation of the myopia lens on the surface of the optical waveguide sheet 33 may greatly reduce the difference of refractive indexes inside and outside the optical waveguide sheet 33, and the optical signal is difficult to form total reflection in the optical waveguide sheet 33, thereby affecting the transmission of the optical signal by the optical waveguide sheet 33. The integrated lens 100 of the present application is provided with the first protection sheet 31 and the second protection sheet 35 respectively on the two opposite sides of the optical waveguide sheet 33, and the first protection sheet 31 and the second protection sheet 35 are respectively spaced from the optical waveguide sheet 33, which not only protects the optical waveguide sheet 33 and prevents the optical waveguide sheet 33 from being damaged or scratched, but also forms an air layer on the surface of the optical waveguide sheet 33, so that the light emitted into the optical waveguide sheet 33 by the projector can be totally reflected inside the optical waveguide sheet 33, and moreover, the first protection sheet 31 and the second protection sheet 35 separate the optical waveguide sheet 33 from the thermosetting resin glue solution during the casting process, thereby preventing the coupling grating and the coupling grating of the optical waveguide sheet 33 from being damaged.

Alternatively, the first protective sheet 31 and the second protective sheet 35 may be adhered to opposite sides of the optical waveguide sheet 33 by an adhesive layer such as a light-curable adhesive (e.g., a UV adhesive), an optical adhesive (OCA adhesive), a thermosetting adhesive, a hot melt adhesive, a double-sided adhesive, a foam adhesive, and the like, and the adhesive layer may further enable the first protective sheet 31 and the second protective sheet 35 to be respectively disposed at intervals with the optical waveguide sheet 33 to form an air layer. The adhesive layer covers the outer peripheral edges of the first protective sheet 31 and the second protective sheet 35.

Optionally, the first protection sheet 31 has a first surface 311 and a third surface 313 which are opposite to each other, the first surface 311 is convex (in other words, the first surface 311 is convex in a direction approaching the first lens 10), the third surface 313 is concave (in other words, the third surface 313 is concave in a direction approaching the first surface 311), and a radius of curvature of the third surface 313 is equal to a radius of curvature of the first surface 311. The first surface 311 is convex, and when the first protective sheet 31 is attached to the first lens 10, the first lens 10 can be better supported, so that the total number of myopic degrees that can be corrected by the integrated lens 100 is larger.

In one embodiment, the radius of curvature of the first light emitting surface 13, the radius of curvature of the first surface 311, and the radius of curvature of the third surface 313 are all equal.

Optionally, the radius of curvature R1 of the first surface 311 is 0.14m R1 m 2.8 m. Specifically, the radius of curvature R1 of the first surface 311 may be, but is not limited to, 0.14m, 0.3m, 0.5m, 0.7m, 1.0m, 1.2m, 1.4m, 1.6m, 1.8m, 2.0m, 2.2m, 2.4m, 2.6m, 2.8m, and the like.

Alternatively, the material of the first protective sheet 31 includes at least one of polymethyl methacrylate (PMMA), Polycarbonate (PC), polyethylene terephthalate (PET), tempered glass, sapphire, and the like.

Alternatively, the air gap d1 between the first protective sheet 31 and the optical waveguide sheet 33 ranges from 0.01 mm. ltoreq. d 1. ltoreq.1 mm in the extending direction of the optical axis, and when the first protective sheet 31 is arc-shaped, the air gap d1 between the first protective sheet 31 and the optical waveguide sheet 33 means the distance between the first protective sheet 31 and the optical waveguide sheet 33 on the optical axis. Specifically, the air gap d1 between the first protective sheet 31 and the optical waveguide sheet 33 may be, but is not limited to, 0.01mm, 0.03mm, 0.05mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, and the like. The smaller the air gap d1 between the first protective sheet 31 and the optical waveguide sheet 33, the better, the smaller the air gap, and the smaller the thickness of the optical waveguide component 30, which is more favorable for ultra-thinning of the integrated lens 100.

In some embodiments, the refractive index n 1' of the first protective sheet 31 and the refractive index n1 of the first lens 10 satisfy the following relation: n1/n 1' is not less than 0.95 and not more than 1.05. Specifically, the refractive index n 1' of the first protective sheet 31 may be, but is not limited to, 0.95n1, 0.96n1, 0.97n1, 0.98n1, 0.99n1, n1, 1.01n1, 1.02n1, 1.03n1, 1.04n1, 1.05n1, and the like. The closer the refractive index n 1' of the first protective sheet 31 is to the refractive index n1 of the first lens 10, the less likely the light is to be refracted when passing through the interface between the first lens 10 and the first protective sheet 31. In one embodiment, the refractive index n 1' of the first protective sheet 31 is equal to the refractive index n1 of the first lens 10.

Alternatively, the optical Waveguide sheet 33 may be, but not limited to, a Geometric Waveguide (geometrical Waveguide) or a Diffractive Waveguide (differential Wav Waveguide). The diffractive light waveguide can be a Surface Relief diffractive light waveguide (Surface Relief diffraction) or a Holographic diffractive light waveguide (volume Holographic diffraction). When the optical waveguide sheet 33 is a diffractive optical waveguide, the optical waveguide sheet 33 includes a main body 330, an incoupling grating 331 and an outcoupling grating 333, the incoupling grating 331 and the outcoupling grating 333 are disposed at intervals on the surface of the main body 330 facing the first protective sheet 31, and the incoupling grating 331 is used for receiving the optical signal entering the optical waveguide sheet 33 and coupling the optical signal into the main body 330; the body portion 330 is used for transmitting the optical signal; the coupling-out grating 333 is used for receiving the optical signal transmitted by the main body 330 and coupling the optical signal out of the optical waveguide sheet 33. Referring to fig. 5, in some embodiments, the optical waveguide sheet 33 further includes a turning grating 335, that is, the optical waveguide sheet 33 includes a body portion 330, an incoupling grating 331, a turning grating 335 and an outcoupling grating 333, and the incoupling grating 331, the turning grating 335 and the outcoupling grating 333 are disposed on the surface of the body portion 330 facing the first protection sheet 31.

Alternatively, the surface of the second protective sheet 35 facing away from the first protective sheet 31 is a second surface 351, and the second surface 351 is a plane. The surfaces of the second surface 351 and the second protection sheet 35 away from the second surface 351 are both flat.

Alternatively, the material of the second protective sheet 35 includes at least one of polymethyl methacrylate (PMMA), Polycarbonate (PC), polyethylene terephthalate (PET), tempered glass, sapphire, and the like.

Alternatively, the air gap d2 between the second protect sheet 35 and the optical waveguide sheet 33 may range from 0.01 mm. ltoreq. d 2. ltoreq.1 mm in the extending direction of the optical axis. Specifically, the air gap d2 between the second protective sheet 35 and the optical waveguide sheet 33 may be, but is not limited to, 0.01mm, 0.03mm, 0.05mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, and the like. The smaller the air gap d2 between the second protective sheet 35 and the optical waveguide sheet 33, the smaller the air gap, and the smaller the thickness of the optical waveguide assembly 30, which is more advantageous for the ultra-thinning of the integrated lens 100.

In some embodiments, the refractive index n 2' of the second protect sheet 35 and the refractive index n2 of the second lens 50 satisfy the relationship: n2/n 2' is not less than 0.95 and not more than 1.05. Specifically, the refractive index n 2' of the second protective sheet 35 may be, but is not limited to, 0.95n2, 0.96n2, 0.97n2, 0.98n2, 0.99n2, n2, 1.01n2, 1.02n2, 1.03n2, 1.04n2, 1.05n2, and the like. The closer the refractive index n 2' of the second protect sheet 35 and the refractive index n2 of the second lens 50 are, the less easily the light is refracted when passing through the interface between the second lens 50 and the second protect sheet 35. In one embodiment, the refractive index n 2' of the second protect sheet 35 is equal to the refractive index n2 of the second lens 50.

Referring to fig. 3 again, optionally, the second surface 351 of the second protective sheet 35 has an incident area 3511 (i.e. the second surface 351 includes an incident area 3511), the incident area 3511 is disposed corresponding to the coupled grating 331 of the optical waveguide sheet 33, and the incident area 3511 is used for guiding the optical signal, i.e. the incident area 3511 is used for guiding the optical signal to the optical waveguide sheet 33 by the projector. The incident region 3511 is disposed corresponding to the coupling grating 331 of the optical waveguide sheet 33, and it is understood that the incident region 3511 at least partially overlaps the coupling grating 331, and also covers the coupling grating 331 for the orthographic projection of the incident region 3511 on the coupling grating 331.

Referring to fig. 6, in some embodiments, the optical waveguide assembly 30 further includes a first antireflection film 37 and a second antireflection film 39, the first antireflection film 37 is disposed on the third surface 313 of the first protection sheet 31; in other words, the first antireflection film 37 is provided on the surface of the first protective sheet 31 facing the optical waveguide sheet 33, and is used to reduce the reflectance of the integrated lens 100 with respect to light and increase the transmittance of the integrated lens 100. The second antireflection film 39 is provided on the surface of the second protective sheet 35 facing the first protective sheet 31; in other words, the second antireflection film 39 is provided on the surface of the second protective sheet 35 facing the optical waveguide sheet 33, and is used to reduce the reflectance of the integrated lens 100 with respect to light and increase the transmittance of the integrated lens 100.

Alternatively, the first antireflection film 37 may include one or more of titanium dioxide, silicon dioxide, zirconium dioxide, silicon nitride, or the like. The first antireflection film 37 may be a single layer or a plurality of layers stacked. Alternatively, the second antireflective film 39 may comprise one or more of titanium dioxide, silicon dioxide, zirconium dioxide, silicon nitride, and the like. The second antireflection film 39 may be a single layer or a plurality of layers stacked.

In some embodiments, the second lens 50 has a second light incident surface and a second light emitting surface opposite to each other, and the second light incident surface is attached to the optical waveguide assembly 30. Specifically, the second light incident surface is attached to the second surface 351.

Optionally, the second light incident surface is a plane; the second light emitting surface is concave, in other words, the second light emitting surface is concave toward the direction close to the second light incident surface. In one embodiment, the second light emitting surface is a spherical surface.

Optionally, the radius of curvature R3 of the second light emitting surface is 0.078m ≦ R3 ≦ 2.8 m. Specifically, the radius of curvature R2 of the second light emitting surface may be, but is not limited to, 0.078m, 0.14m, 0.3m, 0.5m, 0.7m, 1.0m, 1.2m, 1.4m, 1.6m, 1.8m, 2.0m, 2.2m, 2.4m, 2.6m, 2.8m, and the like. The smaller the curvature radius R3 of the second light emitting surface, the higher the approximation power that the second lens 50 can correct.

Optionally, the second lens 50 is a resin lens, and the material of the second lens 50 includes a second thermosetting resin. The second thermosetting resin includes at least one of polydiethylene glycol, polydiallyl glycol carbonate, polyallyl diglycol carbonate, polypropylene glycol, poly 1, 3-butylene glycol methacrylate, polyallyl methacrylate, polyethoxymethyl methacrylate, polyurethane, and the like. The second lens 50 is made of a thermosetting resin, and has a lighter weight compared to a glass lens, which makes the integrated lens 100 lighter. In addition, compared to using a thermoplastic resin and a thermosetting resin, the temperature for preparing the second lens 50 is lower, the residual stress after cooling is smaller (i.e., there is no high thermal stress), and the obtained second lens 50 is less prone to deformation and has better optical properties. Compared with a photo-curing resin (i.e., a resin polymerized by a photoinitiator), the second lens 50 is not easily yellowed after a certain period of time of use due to the thermosetting resin, and the photo-curing resin is likely to have a residual photoinitiator, which absorbs ultraviolet rays and is easily yellowed after a certain period of time of use, thereby affecting the light transmittance of the integrated lens 100.

Optionally, the light transmittance T2 of the second lens 50 ranges from T2 ≧ 90%. Further, the light transmittance T2 of the second lens 50 is in the range of T2 ≥ 95%. Specifically, the light transmittance T2 of the second lens 50 may be, but is not limited to, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5%, etc. The higher the light transmittance of the second lens 50, the better the optical performance of the resulting integrated optic 100.

Referring to fig. 7, optionally, the second lens 50 has a light-passing hole 51, an orthographic projection of the light-passing hole 51 on the incident region 3511 at least partially overlaps the incident region 3511, and an orthographic projection of the light-passing hole 51 on the second surface 351 at least partially overlaps the incident region 3511, the light-passing hole 51 is used for passing a light signal emitted by a projection light machine of the augmented reality device, and the light signal passes through the light-passing hole 51 and then enters the incident region 3511, so as to enter the light waveguide sheet 33. In some embodiments, the projector optical engine can also be partially embedded in the light-passing hole 51; for example, the lens of the optical projection engine is embedded in the light-passing hole 51, and the display of the optical projection engine is disposed on a side of the second lens 50 away from the first lens 10. In addition, the whole projection light machine can be arranged in the light through hole 51, so that the volume of the augmented reality device can be further reduced.

In one embodiment, the orthographic projection of the light passing hole 51 on the incident region 3511 overlaps the incident region 3511.

Referring to fig. 7 again, in some embodiments, the integrated lens 100 further includes a third antireflection film 70 and a fourth antireflection film 90, the third antireflection film 70 is disposed on the surface of the optical waveguide assembly 30 away from the first lens 10, and the fourth antireflection film 90 is disposed on the surface of the second lens 50 away from the optical waveguide assembly 30. The third antireflection film 70 and the fourth antireflection film 90 are used to reduce the light reflectance of the integrated lens 100 and improve the transmittance of the integrated lens 100.

Alternatively, the third antireflective film 70 may comprise one or more of titanium dioxide, silicon dioxide, zirconium dioxide, silicon nitride, and the like. The third antireflection film 70 may be a single layer or a plurality of layers stacked. Alternatively, the fourth antireflection film 90 may include one or more of titanium dioxide, silicon dioxide, zirconium dioxide, silicon nitride, or the like. The fourth antireflection film 90 may be a single layer or a plurality of layers stacked.

Referring to fig. 8, an embodiment of the present application further provides a method for manufacturing an integrated lens 100, which includes:

s201, providing an optical waveguide component 30, where the optical waveguide component 30 has a first surface 311 and a second surface 351 opposite to each other;

for a detailed description of the optical waveguide assembly 30, please refer to the description of the corresponding parts of the above embodiments, which are not repeated herein.

S202, injecting a first thermosetting resin glue solution into the first surface 311 of the optical waveguide component 30, and injecting a second thermosetting resin glue solution into the second surface 351 of the optical waveguide component 30; and

optionally, before injecting the first thermosetting resin glue solution and the second thermosetting resin glue solution, the optical waveguide component 30 is installed at a preset position in a casting mold, and the relative position of the optical waveguide component 30 and the mold is fixed; next, a first thermosetting resin glue is injected into the first surface 311 of the optical waveguide assembly 30, and a second thermosetting resin glue is injected into the second surface 351 of the optical waveguide assembly 30.

In one embodiment, when the first thermosetting resin glue solution and the second thermosetting resin glue solution are in the same phase, the first thermosetting resin glue solution is directly injected into the mold cavity, so that the first thermosetting resin glue solution covers at least the first surface 311 and the second surface 351 of the optical waveguide component 30. The first lens 10 and the second lens 50 thus manufactured have the same raw material composition and are of an integrally molded structure, and no phase interface is present between the first lens 10 and the second lens 50.

Alternatively, the first thermosetting resin gum solution may include, but is not limited to, at least one of diethylene glycol, diallyl glycol carbonate, allyl diglycol carbonate, propylene glycol, 1, 3-butylene glycol methacrylate, allyl methacrylate, ethoxymethyl methacrylate, diphenylmethane diisocyanate (MDI), Toluene Diisocyanate (TDI), polypropylene glycol, and the like.

Alternatively, the second thermosetting resin gum solution may include, but is not limited to, at least one of diethylene glycol, diallyl glycol carbonate, allyl diglycol carbonate, propylene glycol, 1, 3-butylene glycol methacrylate, allyl methacrylate, ethoxymethyl methacrylate, diphenylmethane diisocyanate (MDI), Toluene Diisocyanate (TDI), polypropylene glycol, and the like.

And S203, curing the first thermosetting resin glue solution to form a first lens 10, and curing the second thermosetting resin glue solution to form a second lens 50, wherein the first lens 10 has negative focal power, and the second lens 50 has negative focal power.

Optionally, the first thermosetting resin glue solution and the second thermosetting resin glue solution are gradually heated to perform segmented curing, so that the first thermosetting resin glue solution is thermally cured to form a first thermosetting resin to obtain the first lens 10, and the second thermosetting resin glue solution is thermally cured to form a second thermosetting resin to obtain the second lens 50.

Optionally, the staged curing includes a first stage curing, a second stage curing, and a third stage curing. In some embodiments, the temperature is raised to 50 ℃ to 80 ℃ within 3h to 8h, and the first stage curing is performed for 3h to 4 h; then heating to 85-105 ℃ within 2-4 h, and carrying out second-stage curing for 1-3 h; then heating to 115-140 ℃ within 2-4 h, and carrying out third-stage curing for 1-3 h; finally, slowly cool to room temperature, e.g., to room temperature over 2 to 4 hours. During segmented curing, the chain growth reaction of the polymerization reaction is ensured to be sufficient during the first-stage curing, and sufficient temperature conditions are required to be provided at the crosslinking stage during the second-stage curing to realize optimal crosslinking.

In a specific embodiment, when the first thermosetting resin glue solution or the second thermosetting resin glue solution comprises diphenylmethane diisocyanate (MDI), Toluene Diisocyanate (TDI) and polypropylene glycol (i.e., polyurethane resin glue solution), the temperature can be raised to 50 ℃ to 60 ℃ within 4 hours, and the first-stage curing is performed, wherein the first-stage curing time is 3.5 hours; then heating to 90-100 ℃ within 2h, and carrying out second-stage curing for 2 h; then heating to 120-130 ℃ in 3h, and carrying out third-stage curing for 2 h; finally, slowly cool to room temperature, e.g., within 3 hours.

For a description of other relevant portions of the first lens 10 and the second lens 50, refer to the description of the corresponding portions of the above embodiments.

According to the preparation method of the integrated lens 100, the first thermosetting resin glue solution and the second thermosetting resin glue solution are respectively injected into the two opposite surfaces of the optical waveguide component 30 in a pouring mode, and the first lens 10 and the second lens 50 are respectively formed after curing, so that the first lens 10, the optical waveguide component 30 and the second lens 50 of the prepared integrated lens 100 are attached and arranged into an integrated structure, the myopia function and the reality enhancement function are combined, and the integrated lens 100 has better integration and is thinner and thinner in thickness. In addition, the optical waveguide component 30 forms a lens combination with negative focal power on both sides, so that the diopter correction range is wider, the optical waveguide component can be suitable for myopes more widely, and the optical waveguide component has thinner thickness. Moreover, compared with the thermoplastic resin and the thermosetting resin, the temperature for preparing the first lens 10 and the second lens 50 is lower (the temperature is above the melting point of the resin when the thermoplastic resin is injected), the residual stress after cooling is smaller (i.e. high thermal stress does not exist), and the obtained first lens 10 and the second lens 50 are less prone to deformation and have better optical performance. Compared with a photo-curing resin (i.e., a resin polymerized by a photoinitiator), the first lens 10 and the second lens 50 are not easily yellowed after a period of time of use due to the thermosetting resin, and the photo-curing resin is likely to have a residual photoinitiator, which absorbs ultraviolet rays and is likely to yellow after a period of time of use, thereby affecting the light transmittance of the integrated lens 100. Compare in the lens that 3D printed and make, the lens that 3D printed and made is with high costs, produce the layer line easily, and the layer line can influence the optical effect of integrated lens, and user experience is poor, and the lens that the preparation method of this application made does not have the layer line, and the cost is lower.

Referring to fig. 9 and fig. 10, an embodiment of the present application further provides a method for manufacturing an integrated lens 100, which includes:

s301, providing an optical waveguide component 30, where the optical waveguide component 30 has a first surface 311 and a second surface 351 opposite to each other;

optionally, the second surface 351 has an incident region 3511, and the incident region 3511 is used for the projector to emit the optical signal toward the optical waveguide sheet 33.

For a detailed description of the optical waveguide assembly 30, please refer to the description of the corresponding parts of the above embodiments, which is not repeated herein.

S302, providing a positioning holder 10' on the incident region 3511 of the optical waveguide assembly 30;

alternatively, the positioning bracket 10 'is fixed to the incident region 3511 of the optical waveguide assembly 30 by using an adhesive such as PVA glue that can be dissolved in a solvent such as water or ethanol, and the positioning bracket 10' covers the incident region 3511 of the optical waveguide assembly 30.

S303, installing the optical waveguide component 30 with the positioning support 10 'at a preset position of the casting mold 30', and fixing the positioning support 10 'and the casting mold 30';

fixing the positioning bracket 10 'and the casting mold 30' can prevent the position of the optical waveguide component 30 from moving relatively in the subsequent casting process, which causes the produced integrated lens 100 to be defective. In addition, after the positioning support 10' is removed, a light through hole 51 may be left in the formed second lens 50, and the light through hole 51 may be used for light signals of the projection light engine to enter.

S304, injecting a first thermosetting resin glue solution into the first surface 311 of the optical waveguide component 30, and injecting a second thermosetting resin glue solution into the second surface 351 of the optical waveguide component 30;

s305, curing the first thermosetting resin glue solution to form a first lens 10, and curing the second thermosetting resin glue solution to form a second lens 50, wherein the first lens 10 has negative focal power, and the second lens 50 has negative focal power; and

and S306, removing the casting mold 30 'and the positioning support 10' to enable the formed second lens 50 to be provided with the light through hole 51, and obtaining the integrated lens 100.

Alternatively, the glue for fixing the positioning bracket 10 ' is dissolved away by using a solvent such as water or ethanol to remove the positioning bracket 10 ', and a light-passing hole 51 is formed at a position on the second lens 50 where the positioning bracket 10 ' is disposed.

For a detailed description of the same parts of this embodiment as those of the above embodiments, please refer to the description of the corresponding parts of the above embodiments, which is not repeated herein.

In some embodiments, the method of making the integrated lens 100 of the present application further comprises: the integrated lens 100 is machined (CNC machining), and ground and polished.

In some embodiments, the method of making the integrated lens 100 of the present application further comprises: a third antireflection film 70 is plated on the surface of the first lens 10 facing away from the optical waveguide assembly 30, and a fourth antireflection film 90 is plated on the surface of the second lens 50 facing away from the optical waveguide assembly 30.

Alternatively, the third antireflection film 70 and the fourth antireflection film 90 may be formed by an evaporation coating process, a sputtering coating process, or the like.

Referring to fig. 11, the embodiment of the present application further provides an integrated lens 100, which includes: an encapsulation layer 20, an optical waveguide assembly 30, and a lens 40. The optical waveguide component 30 is arranged on one side of the packaging layer 20 and used for protecting the optical waveguide component 30; lens 40 has negative power, and lens 40 sets up in the one side that optical waveguide component 30 deviates from encapsulation layer 20, and encapsulation layer 20, optical waveguide component 30 and lens 40 are structure as an organic whole, and the outer peripheral edge of encapsulation layer 20 is connected with the outer peripheral edge of lens 40, and optical waveguide component 30 is enclosed in the accommodation space 101 that encapsulation layer 20 and lens 40 enclose.

It can be understood that the present embodiment is mainly different from the above-mentioned embodiment of fig. 1 and 2 in that the first lens 10 has no optical power, i.e. the optical power of the first lens 10 is 0, and the first lens 10 does not contribute to the optical power at this time, and more of the first lens has a protective effect on the optical waveguide assembly 30. Therefore, in order to distinguish from the first lens 10 described above, the following embodiment is referred to as an encapsulation layer 20.

Further, the packaging layer 20, the optical waveguide component 30 and the lens 40 are sequentially attached to each other, and the optical waveguide component 30 is wrapped in the accommodating space 101 enclosed by the packaging layer 20 and the lens 40, so that the optical waveguide component 30 can be better protected, and the optical waveguide component 30 is prevented from being damaged in the using process.

In use, the lens 40 can be close to human eyes, in other words, external light enters the integrated lens 100 from the packaging layer 20, sequentially passes through the packaging layer 20, the optical waveguide component 30 and the lens 40, and then enters human eyes. The lens 40 may be disposed away from the human eye, that is, external light enters the integrated lens 100 from the lens 40, sequentially passes through the lens 40, the optical waveguide assembly 30 and the package layer 20, and then enters the human eye. When the lens 40 is close to the human eye, the human eye can be spaced from the integrated lens 100 by a larger distance, thereby improving the wearing comfort and safety. Furthermore, the lens 40 is disposed close to the human eye, which may result in a better appearance of the integrated lens 100 as a whole than if the lens 40 is disposed away from the human eye (the outer surface is concave).

The optical waveguide component 30 of the embodiment of the present application has an encapsulation layer 20 on one surface, the focal power of the encapsulation layer 20 is 0, and a lens 40 is disposed on the other surface opposite to the encapsulation layer, where the lens 40 has negative focal power, so that the integrated lens 100 combines a near vision function and an augmented reality function (AR). In addition, the encapsulation layer 20 and the lens 40 are located on two opposite sides of the optical waveguide assembly 30, so that the optical waveguide assembly 30 can be well protected. The outer periphery of the encapsulation layer 20 is connected with the outer periphery of the lens 40, and the optical waveguide assembly 30 is enclosed in the accommodating space 101 enclosed by the encapsulation layer 20 and the lens 40, so that the integrated lens 100 has better integrity, the optical waveguide assembly 30 can be well protected, and the integrated lens 100 can be thinner and lighter.

Alternatively, the material of the encapsulating layer 20 includes a first thermosetting resin, and the first thermosetting resin includes at least one of polydiethylene glycol, polydiallyl glycol carbonate, polyallyl diglycol carbonate, polypropylene glycol, poly 1, 3-butylene glycol methacrylate, polyallyl methacrylate, polyethoxymethyl methacrylate, polyurethane, and the like. The encapsulation layer 20 made of thermosetting resin has a lighter weight compared to glass, and can make the integrated lens 100 lighter. In addition, compared with the thermoplastic resin and the thermosetting resin, the preparation temperature is lower when the packaging layer 20 is formed, the residual stress after cooling is lower (i.e. high thermal stress does not exist), and the obtained packaging layer 20 is less prone to deformation and has better optical performance. Compared with a photo-curing resin (i.e., a resin polymerized by a photoinitiator), the thermosetting resin is not prone to yellowing after a certain period of time, and the photo-curing resin is prone to residual photoinitiator, which absorbs ultraviolet rays and is prone to yellowing after a certain period of time, thereby affecting the light transmittance of the integrated lens 100.

Optionally, the surface of the encapsulation layer 20 close to the optical waveguide assembly 30 and the surface facing away from the optical waveguide assembly 30 are both planar.

Optionally, the light transmittance t1 of the encapsulation layer 20 is in the range of t1 ≧ 90%. Further, the light transmittance T1 of the encapsulation layer 20 is in the range of T1 ≥ 95%. Specifically, the light transmittance t1 of the encapsulation layer 20 may be, but is not limited to, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5%, etc. The higher the light transmittance of the encapsulant layer 20, the better the optical performance of the resulting integrated lens 100.

Optionally, the optical waveguide assembly 30 has a first surface 311 and a second surface 351 opposite to each other, the first surface 311 is attached to the package layer 20, and the second surface 351 is attached to the lens 40.

Referring to fig. 12 and 13, in some embodiments, the optical waveguide assembly 30 includes a first protection sheet 31, an optical waveguide sheet 33, and a second protection sheet 35, which are sequentially disposed at intervals, wherein the first protection sheet 31 is disposed closer to the encapsulation layer 20 than the second protection sheet 35 is; in other words, the second protective sheet 35 is disposed closer to the lens 40 than the first protective sheet 31, and the optical waveguide sheet 33 is used to transmit the optical signal incident on the optical waveguide sheet 33 and perform one-dimensional or two-dimensional pupil expansion on the image information in the optical signal. The first protective sheet 31 and the second protective sheet 35 are respectively disposed at intervals from the optical waveguide sheet 33, and not only can protect the optical waveguide sheet 33 from being damaged or scratched, but also an air layer can be formed on the surface of the optical waveguide sheet 33, so that the light emitted into the optical waveguide sheet 33 by the projector can be totally reflected inside the optical waveguide sheet 33.

Alternatively, the first protective sheet 31 is attached to the sealing layer 20, and the second protective sheet 35 is attached to the lens 40.

Optionally, the first protection sheet 31 has a first surface 311 and a third surface 313 which are opposite to each other, the first surface 311 is a surface of the first protection sheet 31 facing away from the second protection sheet 35, and the second protection sheet 35 has a second surface 351 facing away from the first protection sheet 31. The first surface 311, the second surface 351 and the third surface 313 are all planar. Alternatively, the second surface 351 of the second protective sheet 35 has an incident region 3511 thereon, the incident region 3511 is disposed corresponding to the coupling grating 331 of the optical waveguide sheet 33, and the incident region 3511 is used for the projector to inject the optical signal toward the optical waveguide sheet 33. The incident region 3511 is disposed corresponding to the coupling grating 331 of the optical waveguide sheet 33, and it is understood that the incident region 3511 at least partially overlaps the coupling grating 331, and also covers the coupling grating 331 for the orthographic projection of the incident region 3511 on the coupling grating 331. Except that the first surface 311 and the third surface 313 of the first protection sheet 31 of the optical waveguide assembly 30 of the present embodiment are both flat, reference may be made to the description of the corresponding parts of the above embodiments for other features of the optical waveguide assembly 30, and details are not repeated here.

Referring to fig. 14, in some embodiments, the optical waveguide assembly 30 further includes a first antireflection film 37 and a second antireflection film 39, the first antireflection film 37 is disposed on the third surface 313 of the first protection sheet 31; in other words, the first antireflection film 37 is provided on the surface of the first protective sheet 31 facing the optical waveguide sheet 33, and is used to reduce the reflectance of the integrated lens 100 with respect to light and increase the transmittance of the integrated lens 100. The second antireflection film 39 is provided on the surface of the second protective sheet 35 facing the first protective sheet 31; in other words, the second antireflection film 39 is provided on the surface of the second protective sheet 35 facing the optical waveguide sheet 33, and is used to reduce the reflectance of the integrated lens 100 with respect to light and increase the transmittance of the integrated lens 100.

Optionally, the surface of lens 40 facing optical waveguide assembly 30 is planar; the surface of the lens 40 facing away from the optical waveguide assembly 30 is concave, in other words, the surface of the lens 40 facing away from the optical waveguide assembly 30 is concave toward the direction approaching the optical waveguide assembly 30. In one embodiment, the surface of lens 40 facing away from optical waveguide assembly 30 is spherical.

Optionally, the radius of curvature r of the surface of the lens 40 facing away from the optical waveguide assembly 30 is 0.078m ≦ r ≦ 2.8 m. Specifically, the radius of curvature r of the surface of lens 40 facing away from optical waveguide assembly 30 may be, but is not limited to, 0.078m, 0.14m, 0.3m, 0.5m, 0.7m, 1.0m, 1.2m, 1.4m, 1.6m, 1.8m, 2.0m, 2.2m, 2.4m, 2.6m, 2.8m, and the like. The smaller the radius of curvature r of the surface of lens 40 facing away from optical waveguide assembly 30, the higher the approximation power that lens 40 can correct.

In some embodiments, the focal length f' of the integrated lens 100 is in the range of-4 m ≦ f ≦ 1/8 m. Specifically, the focal length f' of the integrated lens 100 can be, but is not limited to, -4m, -2m, -1m, -2/3m, -0.5m, -1/3m, -1/4m, -1/5m, -1/6m, -1/7m, -1/8m, and the like. The larger the focal length of the integrated lens 100 (i.e., the smaller the absolute value of the focal length), the higher the amount of myopia that can be corrected.

Alternatively, the amount of myopia De 'that the lens 40 can correct can range from 25 DEG ≦ De' ≦ 800 deg. Specifically, the myopic degree De' that the integrated lens 100 can correct may be, but is not limited to, 25 °, 50 °, 75 °, 100 °, 125 °, 150 °, 175 °, 200 °, 225 °, 250 °, 275 °, 300 °, 325 °, 350 °, 375 °, 400 °, 425 °, 450 °, 475 °, 500 °, 525 °, 550 °, 575 °, 600 °, 625 °, 650 °, 675 °, 700 °, 725 °, 750 °, 775 °, 800 °, and the like.

Alternatively, the lens 40 is a resin lens, and the material of the lens 40 includes a second thermosetting resin. The second thermosetting resin includes at least one of polydiethylene glycol, polydiallyl glycol carbonate, polyallyl diglycol carbonate, polypropylene glycol, poly 1, 3-butylene glycol methacrylate, polyallyl methacrylate, polyethoxymethyl methacrylate, polyurethane, and the like. The use of a thermoset resin to form the lens 40 provides a lighter weight and lighter integrated lens 100 than a glass lens. In addition, compared to using a thermoplastic resin and a thermosetting resin, the temperature for forming the lens 40 is lower, the residual stress after cooling is smaller (i.e., there is no high thermal stress), and the obtained lens 40 is less likely to deform and has better optical properties. Compared to a photo-curing resin (i.e., a resin polymerized by a photoinitiator), the thermosetting resin is less likely to yellow the lens 40 after a certain period of use, and the photo-curing resin is likely to have a residual photoinitiator, which absorbs ultraviolet rays and is likely to yellow after a certain period of use, thereby affecting the light transmittance of the integrated lens 100.

In one embodiment, the encapsulant layer 20 and the lens 40 are made of the same material, and there is no interface between the encapsulant layer 20 and the lens 40, so that the encapsulant layer 20 and the lens 40 can be formed in the same process. Alternatively, the encapsulating layer 20 and the lens 40 may be formed by casting or the like in the same process using the same raw material composition. This may result in better integration of the encapsulation layer 20 with the lens 40 and may better simplify the manufacturing process.

Optionally, the light transmittance t2 of the lens 40 is in the range of t2 ≧ 90%. Further, the light transmittance T2 of the lens 40 is in the range of T2 ≥ 95%. Specifically, the light transmittance t2 of the lens 40 may be, but is not limited to, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5%, etc. The higher the light transmittance of the lens 40, the better the optical performance of the resulting integrated lens 100.

Optionally, the lens 40 has a light-passing hole 51, a forward projection of the light-passing hole 51 on the incident region 3511 at least partially overlaps with the incident region 3511, and the light-passing hole 51 is used for a light signal emitted by a projector light machine of the augmented reality device to pass through. In some embodiments, the projector optical engine can also be partially embedded in the light-passing hole 51; for example, the lens of the optical projection engine is embedded in the light-passing hole 51, and the display of the optical projection engine is disposed on a side of the lens 40 away from the encapsulation layer 20. In addition, the whole projection light machine can be arranged in the light through hole 51, so that the volume of the augmented reality device can be further reduced.

Referring to fig. 15, in some embodiments, the integrated lens 100 further includes a third antireflection film 70 and a fourth antireflection film 90, the third antireflection film 70 is disposed on the surface of the optical waveguide assembly 30 away from the encapsulation layer 20, and the fourth antireflection film 90 is disposed on the surface of the lens 40 away from the optical waveguide assembly 30. The third antireflection film 70 and the fourth antireflection film 90 are used to reduce the reflectance of the integrated lens 100 to light and increase the transmittance of the integrated lens 100.

Referring to fig. 16, the embodiment of the present application further provides a method for manufacturing an integrated lens 100, which includes:

s501, providing an optical waveguide component 30, where the optical waveguide component 30 has a first surface 311 and a second surface 351 opposite to each other;

for a detailed description of the optical waveguide assembly 30, please refer to the description of the corresponding parts of the embodiments shown in fig. 11 to fig. 15, which is not repeated herein.

S502, injecting a first thermosetting resin glue solution into the first surface 311 of the optical waveguide component 30, and injecting a second thermosetting resin glue solution into the second surface 351 of the optical waveguide component 30; and

optionally, before injecting the first thermosetting resin glue solution and the second thermosetting resin glue solution, the optical waveguide component 30 is first installed at a preset position in the casting mold 30', and the relative position of the optical waveguide component 30 and the mold is fixed; next, a first thermosetting resin glue is injected into the first surface 311 of the optical waveguide assembly 30, and a second thermosetting resin glue is injected into the second surface 351 of the optical waveguide assembly 30.

For a detailed description of the first thermosetting resin glue solution and the second thermosetting resin glue solution, please refer to the description of the corresponding parts of the above embodiments, which is not repeated herein.

S503, curing the first thermosetting resin glue solution to form the packaging layer 20, and curing the second thermosetting resin glue solution to form the lens 40, wherein the lens 40 has negative focal power, the packaging layer 20, the optical waveguide component 30 and the lens 40 are of an integrated structure, the outer periphery of the packaging layer 20 is connected with the outer periphery of the lens 40, and the optical waveguide component 30 is enclosed in the accommodating space 101 enclosed by the packaging layer 20 and the lens 40.

Optionally, the first thermosetting resin glue solution and the second thermosetting resin glue solution are gradually heated to perform segmented curing, so that the first thermosetting resin glue solution is thermally cured to form a first thermosetting resin to obtain the encapsulation layer 20, and the second thermosetting resin glue solution is thermally cured to form a second thermosetting resin to obtain the lens 40.

For the segmented curing, please refer to the description of the corresponding parts of the above embodiments, which will not be described herein.

According to the preparation method of the integrated lens 100, the first thermosetting resin glue solution and the second thermosetting resin glue solution are respectively injected into the two opposite surfaces of the optical waveguide component 30 in a pouring mode, and the packaging layer 20 and the lens 40 are respectively formed after curing, so that the packaging layer 20, the optical waveguide component 30 and the lens 40 of the prepared integrated lens 100 are arranged in a laminating mode and are of an integrated structure, the myopia function and the reality enhancement function are combined, and the integrated lens 100 has better integration and thinner thickness. In addition, compared with the thermoplastic resin and the thermosetting resin, the temperature is lower when the encapsulating layer 20 and the lens 40 are prepared, the residual stress after cooling is smaller (namely, high thermal stress does not exist), and the obtained encapsulating layer 20 and the lens 40 are less prone to deformation and have better optical performance. Compared with a photo-curing resin (i.e., a resin polymerized by a photoinitiator), the thermosetting resin is less likely to yellow the encapsulant layer 20 and the lens 40 after a certain period of use, and the photo-curing resin is likely to remain a photoinitiator, which absorbs ultraviolet rays and is likely to yellow after a certain period of use, thereby affecting the light transmittance of the integrated lens 100. Compare in the lens that 3D printed and make, the lens that 3D printed and make produces the layer line easily, and the layer line can influence the optical effect of integrated lens, and user experience is poor, and the lens that the preparation method of this application made does not have the layer line.

Referring to fig. 17 and fig. 18, an embodiment of the present application further provides a method for manufacturing an integrated lens 100, which includes:

s601, providing an optical waveguide component 30, where the optical waveguide component 30 has a first surface 311 and a second surface 351 opposite to each other;

s602, providing a positioning bracket 10' on the incident region 3511 of the optical waveguide assembly 30;

s603, installing the optical waveguide assembly 30 having the positioning bracket 10 'at a preset position of the casting mold 30', and fixing the positioning bracket 10 'and the casting mold 30';

s604, injecting a first thermosetting resin glue solution into the first surface 311 of the optical waveguide component 30, and injecting a second thermosetting resin glue solution into the second surface 351 of the optical waveguide component 30;

s605, curing the first thermosetting resin glue solution to form a packaging layer 20, and curing the second thermosetting resin glue solution to form a lens 40, wherein the lens 40 has negative focal power; and

s606, removing the casting mold 30 'and the positioning support 10' to make the formed lens 40 have the light-passing hole 51, so as to obtain the integrated lens 100, wherein the encapsulating layer 20, the optical waveguide assembly 30 and the lens 40 are an integrated structure, an outer periphery of the encapsulating layer 20 is connected with an outer periphery of the lens 40, and the optical waveguide assembly 30 is enclosed in the accommodating space 101 enclosed by the encapsulating layer 20 and the lens 40.

In some embodiments, the method of making the integrated lens 100 of the present application further comprises: a third antireflection film 70 is coated on the surface of the encapsulation layer 20 facing away from the optical waveguide assembly 30 and a fourth antireflection film 90 is coated on the surface of the lens 40 facing away from the optical waveguide assembly 30.

Referring to fig. 19 and 20, an augmented reality apparatus 700 includes: the optical projection engine 710 and the integrated lens 100 of the embodiment of the present application, the optical projection engine 710 includes a display 711 and a lens 713, the display 711 is used for emitting an optical signal, and the optical signal includes image information. A lens 713 is disposed on a display surface of the display 711 and is used for modulating an optical signal to project image information; the integrated lens 100 is disposed on a side of the lens 713 away from the display 711, and is used for transmitting the optical signal modulated by the lens 713.

The augmented reality device 700 of the embodiment of the present application may be, but is not limited to, a near-eye display device such as augmented reality glasses (AR glasses), an augmented reality helmet (AR helmet), an augmented reality mask (AR mask).

For a detailed description of the integrated lens 100, please refer to the description of the corresponding parts of the above embodiments, which is not repeated herein.

Alternatively, the number of integrated lenses 100 may be one or two. For example, when the augmented reality device 700 is augmented reality glasses (AR glasses), the number of lens assemblies is one. When the augmented reality device 700 is one of an augmented reality helmet, an augmented reality mask, etc., the number of lens assemblies is one, or may be two.

Alternatively, the display 711 may be a microdisplay 711. The display 711 may include, but is not limited to, at least one of a Micro Light Emitting Diode (Micro LED) chip, a Micro Organic Light Emitting Diode (Micro OLED) chip, or a Micro liquid crystal display (Micro LCD). Under the same working power condition, the brightness of Micro OLED is usually less than 5000nits, the brightness of LCD is usually less than 15000nits, and the brightness of Micro LED can reach 2000000nits, which is much higher than the former two. Therefore, when the display 711 is a Micro LED display, the output image has higher brightness than the Micro OLED display and the Micro LCD display. Compared with a Micro LCD display, the Micro LED display is a self-luminous light source, and has better contrast and smaller display delay when applied to the projector 710.

Alternatively, the color of the light emitted by the display 711 may be, but is not limited to, at least one of red light, green light, blue light, and the like. In one embodiment, the display 711 is a Micro LED emitting green light, and in other embodiments, may be other monochromatic Micro LEDs or polychromatic Micro LEDs.

Optionally, the lens 713 is a micro projection lens, and the lens 713 is configured to modulate an optical signal (the optical signal includes image information) emitted from the display 711, so that light rays with different field angles emitted from the same pixel point are modulated by the lens 713 and then emitted in the form of parallel light, so that the image information in the optical signal is at an infinite position, so that the image information can be viewed by naked eyes.

Referring to fig. 21, the augmented reality apparatus 700 according to the embodiment of the present disclosure further includes a processor 730, a memory 750, and a power supply module 760. The processor 730 is electrically connected to the display 711 for controlling the display 711 to emit an optical signal having image information, and the memory 750 is electrically connected to the processor 730 for storing a program code required for the processor 730 to operate, a program code required for controlling the display 711, the image information emitted from the display 711, and the like. The power supply module 760 is electrically connected to the processor 730 and the display 711 respectively, and is used for supplying power to the processor 730 and the display 711 under the control of the processor 730.

Optionally, processor 730 includes one or more general-purpose processors 730, wherein general-purpose processor 730 may be any type of device capable of Processing electronic instructions, including a Central Processing Unit (CPU), a microprocessor, a microcontroller, a host processor, a controller, an ASIC, and so forth. Processor 730 is configured to execute various types of digitally stored instructions, such as software or firmware programs stored in memory 750, which enable the computing device to provide a wide variety of services.

Alternatively, Memory 750 may include Volatile Memory (Volatile Memory), such as Random Access Memory (RAM); the Memory 750 may also include a Non-volatile Memory (NVM), such as a Read-Only Memory (ROM), a Flash Memory (FM), a Hard Disk (HDD), or a Solid-State Drive (SSD). Memory 750 may also include a combination of the above types of memory.

Alternatively, the power supply module 760 may be, but is not limited to, a power supply battery, a power supply circuit, and the like.

Referring again to fig. 22, in some embodiments, when the augmented reality device 700 is augmented reality glasses, the augmented reality device 700 of the embodiment of the present application further includes a housing 770 and a wearing piece 790. The housing 770 is used to carry the integrated lens 100. The wearing part 790 is rotatably connected with the housing 770, and the wearing part 790 is used for holding a target object (such as a human head, or a head prosthesis, etc.).

Alternatively, the housing 770 may be, but is not limited to, a support structure such as a frame of augmented reality glasses (AR glasses).

Optionally, the number of the integrated lenses 100 is two, and the two integrated lenses 100 are both carried on the housing 770.

Optionally, the wearing piece 790 comprises a first wearing piece 791 and a second wearing piece 793, the first wearing piece 791 is rotatably connected to one end of the housing 770, and the second wearing piece 793 is rotatably connected to the other end of the housing 770 far away from the first wearing piece 791. The first wearing piece 791 is engaged with the second wearing piece 793 for holding the augmented display device to a target object. In some embodiments, the first wearing piece 791 and the second wearing piece 793 are further used for setting the projector engine 710, that is, the first wearing piece 791 and the second wearing piece 793 are further used for setting the display 711 and the lens 713.

Optionally, the first wearing piece 791 and the second wearing piece 793 may be, but are not limited to, temples of augmented reality glasses (AR glasses).

It is understood that the augmented reality device 700 in the present embodiment is only one form of the augmented reality device 700 to which the integrated lens 100 is applied, and should not be understood as a limitation of the augmented reality device 700 provided in the present application, nor should it be understood as a limitation of the integrated lens 100 provided in various embodiments of the present application.

Reference in the specification to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the embodiments of the present application may be combined arbitrarily without contradiction between them to form another embodiment without departing from the spirit and scope of the present application.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An integrated lens, characterized in that the integrated lens has an optical axis, which comprises, arranged in sequence along the optical axis:

a first lens having a negative optical power or an optical power of 0;

an optical waveguide assembly; and

a second lens having a negative optical power.

2. The integrated lens of claim 1, wherein the first lens, the optical waveguide assembly and the second lens are an integral structure, an outer periphery of the first lens is connected with an outer periphery of the second lens, and the optical waveguide assembly is enclosed in a containing space enclosed by the first lens and the second lens.

3. The integrated optic of claim 1, wherein the optical waveguide assembly has a first surface facing the first lens, the first surface being convex; the curvature radius R1 of the first surface is more than or equal to 0.14m and less than or equal to R1 and less than or equal to 2.8 m.

4. The integrated lens of claim 3, wherein the first lens has a first light incident surface and a first light emitting surface that are opposite to each other, the first light incident surface is a convex surface, the first light emitting surface is a concave surface, the first light emitting surface is attached to the first surface, a curvature radius of the first light incident surface is greater than a curvature radius R2 of the first light emitting surface, and a curvature radius R2 of the first light emitting surface is in a range of 0.14m to R2 to 2.8 m.

5. The integrated lens of claim 3, wherein the optical waveguide assembly further has a second surface disposed opposite the first surface, the second surface being planar; the second lens is provided with a second light incident surface and a second light emitting surface which are arranged in a back-to-back mode, the second light incident surface is a plane, the second light incident surface is attached to the second surface, and the second light emitting surface is a concave surface; the curvature radius R3 of the second light-emitting surface is more than or equal to 0.078m and less than or equal to R3 and less than or equal to 2.8 m.

6. The integrated lens of claim 3, wherein the optical waveguide assembly further has a second surface disposed opposite the first surface; the second surface is provided with an incident area used for guiding an optical signal into the optical waveguide sheet, the second lens is provided with a light through hole, the orthographic projection of the light through hole on the second surface is at least partially overlapped with the incident area, and the optical signal penetrates through the light through hole and then enters the incident area so as to enter the optical waveguide sheet.

7. The integrated lens of claim 1, wherein the optical waveguide assembly comprises:

a first protective sheet;

the optical waveguide sheet is arranged on one side of the first protection sheet at intervals, and comprises a body part, an incoupling grating and an outcoupling grating which are arranged on the surface of the body part facing the first protection sheet at intervals; the coupling grating is used for receiving the optical signal entering the optical waveguide sheet and coupling the optical signal into the body part; the body part is used for transmitting the optical signal; the coupling grating is used for receiving the optical signal transmitted by the main body part and coupling the optical signal out of the optical waveguide sheet; and

the second protects the piece, the second protects the piece interval set up in the light guide piece deviates from the surface of first protection piece, the second protects the piece compare in first protection piece deviates from first lens setting.

8. The integrated lens according to claim 1, wherein the optical waveguide assembly comprises a first protective sheet, an optical waveguide sheet and a second protective sheet, the first protective sheet is disposed closer to the first lens than the second protective sheet, the first protective sheet has a first surface and a third surface, the first surface and the third surface are opposite, the first surface is convex, the third surface is concave, and the radius of curvature of the third surface is equal to the radius of curvature of the first surface; the surface of the second protective sheet, which faces away from the first protective sheet, is a second surface, and the second surface is a plane.

9. The integrated optic of claim 8, wherein the refractive index n 1' of the first protective sheet and the refractive index n1 of the first lens satisfy the relationship: n1/n 1' is not less than 0.95 and not more than 1.05; the refractive index n 2' of the second protective sheet and the refractive index n2 of the second lens satisfy the relation: n2/n 2' is not less than 0.95 and not more than 1.05; the range of the air gap d1 between the first protective sheet and the optical waveguide sheet along the extension direction of the optical axis is 0.01 mm-1 mm-1 mm; the range of the air gap d2 between the second protective sheet and the optical waveguide sheet is not less than 0.01mm and not more than d2 and not more than 1 mm.

10. The integrated lens of claim 8, wherein the optical waveguide assembly further comprises a first anti-reflection film disposed on the third surface of the first protective sheet and a second anti-reflection film disposed on a surface of the second protective sheet facing the first protective sheet; the integrated lens further comprises a third antireflection film and a fourth antireflection film, the third antireflection film is arranged on the surface, far away from the optical waveguide component, of the first lens, and the fourth antireflection film is arranged on the surface, far away from the optical waveguide component, of the second lens.

11. The integrated lens of claim 1, wherein the first lens material comprises a first thermosetting resin, and the first thermosetting resin comprises at least one of polydiethylene glycol, polydiallyl glycol carbonate, polyallyl diglycol carbonate, polypropylene glycol, poly 1, 3-butylene glycol methacrylate, polyallyl methacrylate, and polyethoxymethyl methacrylate; the material of the second lens comprises a second thermosetting resin, the second thermosetting resin comprises at least one of polydiethylene glycol, polydiallyl glycol carbonate, polyallyl diglycol carbonate, polypropylene glycol, poly 1, 3-butanediol methacrylate, polyallyl methacrylate and polyethoxy methyl methacrylate, and the light transmittance T1 of the first lens is in the range of T1 being more than or equal to 90%; the light transmittance T2 of the second lens is in the range of T2 being more than or equal to 90%.

12. The integrated optic of any of claims 1-11, wherein the distance d between the optical center of the first lens and the optical center of the second lens ranges from 0.5mm ≦ d ≦ 5 mm; the focal length f of the integrated lens is in the range of-4 m to-1/14 m.

13. A method of making an integrated lens, comprising:

14. The method for preparing an integrated lens according to claim 13, wherein the second surface of the optical waveguide component has an incident area, and the method further comprises injecting a first thermosetting resin glue solution into the first surface of the optical waveguide component and injecting a second thermosetting resin glue solution into the second surface of the optical waveguide component, before:

arranging a positioning bracket on an incidence area of the optical waveguide component; and

installing the optical waveguide assembly with the positioning support at a preset position of a casting mold, and fixing the positioning support and the casting mold;

after the first thermosetting resin glue solution is cured to form a first lens and the second thermosetting resin glue solution is cured to form a second lens, the method further comprises the following steps:

and removing the casting mold and the positioning bracket so as to enable the formed second lens to be provided with a light through hole.

15. An augmented reality device, comprising:

the integrated lens of any one of claims 1-12, disposed on a side of the lens facing away from the display, for transmitting the light signal modulated by the lens.