CN218037539U - Optical waveguide piece and lens integrated lens and AR glasses - Google Patents
Optical waveguide piece and lens integrated lens and AR glasses Download PDFInfo
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- CN218037539U CN218037539U CN202121090994.2U CN202121090994U CN218037539U CN 218037539 U CN218037539 U CN 218037539U CN 202121090994 U CN202121090994 U CN 202121090994U CN 218037539 U CN218037539 U CN 218037539U
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Abstract
The utility model discloses an optical waveguide piece and integrated lens of lens and AR glasses, this integrated lens includes: an optical waveguide sheet for conducting an image; positive lenses and negative lenses respectively arranged at the front end and the rear end of the optical waveguide sheet, and air gaps are reserved between the positive lenses and the optical waveguide sheet and between the negative lenses and the optical waveguide sheet; wherein the positive lens is used for compensating the influence of the negative lens on the external environment, and the negative lens is used for correcting the image position and adapting the diopter of human eyes. The embodiment of the utility model provides an utilize the refractive power compensation eye's that positive lens and negative lens are different ametropia to correct the position of projection image, reach the effect of the supplementary scope of binocular.
Description
Technical Field
The utility model relates to a AR shows technical field, concretely relates to optical waveguide piece and integrated lens of lens and AR glasses.
Background
In current AR (augmented reality), MR (mixed reality) technology, correction of the condition of having diopter to the eyes of the wearer has been a relatively difficult problem to solve. It is usually necessary to wear glasses or add extra diopter correction lenses to the AR/MR device, which may affect the structural design and wearing experience of the product. For example, the prior art uses a back-mounted plano-concave lens bonded with a waveguide plate to compensate the diopter of the myope, however, this method directly mounts the lens and increases the thickness of the AR glasses. For example, the focal power is changed by adjusting the lens group laterally to adapt to the diopter of different human eyes, but this method is easy to cause discomfort for the wearer because the focusing method in the method only works under a limited field angle, and the field angle of the human eyes covers other focal segments, thereby causing dizziness.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an optical waveguide piece and integrated lens of lens and AR glasses aims at improving the unmatched problem of the convergence of assisting in the two mesh display, can adapt to wearing of ametropia crowd simultaneously.
The embodiment of the utility model provides an optical waveguide piece and integrated lens of lens, include:
an optical waveguide sheet for transmitting an image;
positive lenses and negative lenses respectively arranged at the front end and the rear end of the optical waveguide sheet, and air gaps are reserved between the positive lenses and the optical waveguide sheet and between the negative lenses and the optical waveguide sheet;
wherein, the positive lens is used for compensating the influence of the negative lens on the external environment, and the negative lens is used for correcting the image position and adapting the diopter of human eyes.
Furthermore, antireflection films are plated on the front end and the rear end of the optical waveguide sheet respectively.
Further, edge regions of the positive and negative lenses are provided with extensions toward the optical waveguide sheet.
Further, the center thickness of the positive lens and the negative lens is greater than or equal to 1mm, and the positive lens and the negative lens are both made of optical resin or optical glass.
Furthermore, the diopter of the positive lens ranges from +10 diopters to +500 diopters, and the diopter of the negative lens ranges from-10-M diopters to-500-M diopters, wherein-M is the myopic diopter of the human eyes.
Furthermore, the thickness of the air gap is 0.1-0.2 mm.
Further, the refractive index of the optical waveguide sheet is 1.8 to 1.9.
Furthermore, the antireflection film is provided with a plurality of layers, and the thickness of each film layer is lambda/4 or lambda/2, wherein lambda is the wavelength of light propagating in the corresponding film layer.
Further, the positive lens and the negative lens are both fresnel lenses.
The embodiment of the utility model provides a still provide an AR glasses, include as above arbitrary the integrated lens of optical waveguide piece and lens.
The embodiment of the utility model provides an optical waveguide piece and integrated lens of lens and AR glasses, this integrated lens includes: an optical waveguide sheet for transmitting an image; the positive lens and the negative lens are respectively arranged at the front end and the rear end of the optical waveguide sheet, and air gaps are reserved between the positive lens and the optical waveguide sheet and between the negative lens and the optical waveguide sheet; wherein, the positive lens is used for compensating the influence of the negative lens on the external environment, and the negative lens is used for correcting the image position and adapting the diopter of human eyes. The embodiment of the utility model provides an utilize the refractive power compensation eye's that positive lens and negative lens are different ametropia to correct the position of projection image, reach the effect of the mesh convergence of matching.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic structural view of an optical waveguide sheet and lens integrated lens according to an embodiment of the present invention;
fig. 2a, fig. 2b and fig. 2c are schematic diagrams illustrating an exemplary optical waveguide sheet and lens integrated lens according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating another example of an optical waveguide sheet and lens integrated lens according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an optical waveguide sheet in an optical waveguide sheet and lens integrated lens according to an embodiment of the present invention;
fig. 5 is another schematic structural diagram of an optical waveguide sheet and lens integrated lens according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an integrated optical waveguide sheet and lens provided in an embodiment of the present invention, where the integrated optical lens includes:
an optical waveguide sheet 1 for conducting an image;
the positive lens 2 and the negative lens 3 are respectively arranged at the front end and the rear end of the optical waveguide sheet 1, and air gaps 4 are reserved between the positive lens 2 and the optical waveguide sheet 1 and between the negative lens 3 and the optical waveguide sheet 1;
wherein, the positive lens 2 is used for compensating the influence of the negative lens 3 on the external environment, and the negative lens 3 is used for correcting the image position and adapting the diopter of human eyes.
In this embodiment, the integrated lens includes an optical waveguide sheet 1, a positive lens 2 and a negative lens 3, and air gaps 4 are left between the positive lens 2 and the optical waveguide sheet 1 and between the negative lens 3 and the optical waveguide sheet 1, so as to prevent light from overflowing through the lenses during transmission.
In a specific embodiment, the positive lens 2 and the negative lens 3 are respectively disposed by gluing or mechanically assembled with the optical waveguide sheet 1, thereby obtaining the integrated lens. Gluing or mechanical assembly are convenient for customization and replacement aiming at different people, and the cost is lower.
In the prior art, the watching experience of people with ametropia is improved mainly by directly mounting a dioptric lens on an optical waveguide sheet, and the method has low integration level and larger volume. The lens and the optical waveguide sheet 1 are integrated together by gluing or mechanical assembly, the integration level is high, and the diopter of human eyes can be conveniently replaced when changed.
In addition, this embodiment adopts the combination of positive, negative lens to carry out image position and corrects, and is specific, negative lens 3 is used for correcting the image position, positive lens 2 is used for compensating the influence of negative lens 3 to external environment to solve the unmatched problem of binocular vergence, the two mesh display of ability adaptation, and do not cause the influence to ring portion environment formation of image.
According to the binocular imaging principle of the human eyes shown in the figure 2a, due to the fact that the interpupillary distance of the human eyes is short, the observation distance L is approximately equal to the focusing distance d, namely L is approximately equal to d, when a user wears the AR glasses, light rays are emitted in parallel to enter the human eyes, imaging is conducted at infinite distance, namely L & lt d, the phenomenon is that binocular convergence is mismatched, discomfort of the human eyes can be caused, and the user is tired to watch. In order to improve the above situation, in the present embodiment, a negative lens 3 is integrated in the eye box (a tapered region between the near-eye display optical module and the eyeball, and the region with the clearest display content) in the exit pupil region, as shown in fig. 2c, the dotted line h is an exit pupil beam, which is diffused by the negative lens 3, so that an object can be imaged at a specific position, and the diopter of the negative lens 3 is adjusted to make L ≈ d, so that the problem of unmatched binocular vergence can be solved.
While the negative lens 3 can solve the problem of binocular convergence mismatch, it also has an influence on the external environment, so the present embodiment compensates for the negative lens 3 by introducing the positive lens 2. As shown in fig. 3, the route m is a light beam propagating in the optical waveguide sheet 1, and the route n is a light beam of the external environment. For the route m, the image comes out of the projector, passes through an entrance pupil, an expanded pupil and an exit pupil, exits as parallel light beams, and is diffused by the negative lens 3 to be imaged at a front specific position; for the route n, the route n firstly shrinks through the positive lens 2, then is diffused by the negative lens 3, and finally images are formed on the original position, and the influence of the two lenses on the external light beams is mutually offset, so that the external environment is not influenced. Wherein, the sum of diopters of the positive lens 2 and the negative lens 3 is zero. Therefore, for people with ametropia, the sum of the diopters of the positive lens 2 and the negative lens 3 can be equal to the ametropia power of the user by adjusting the diopter of the negative lens 3, and the wearing requirement can be met.
In a specific embodiment, the diopter of the positive lens 2 is determined according to the imaging distance, the mold is opened separately, the positive lens 2 and the optical waveguide sheet 1 are glued or mechanically assembled to form a single-lens waveguide module, an air gap is required to be reserved between the optical waveguide sheet 1 and the positive lens 2, and then the negative lens 3 is manufactured according to the user's dual-purpose diopter and assembled with the single-lens waveguide module.
In an embodiment, referring to fig. 4, antireflection films 11 are respectively plated on the front end and the rear end of the optical waveguide sheet 1.
In this embodiment, the antireflection film 11 is plated on both sides of the optical waveguide sheet 1 to reduce interference of reflected light and improve light transmittance.
In an embodiment, the edge regions of the positive lens 2 and the negative lens 3 are provided with extensions towards the optical waveguide sheet 1.
In this embodiment, the optical waveguide sheet 1 can be better integrated into the positive lens 2 and the negative lens 3 through the extension portions (i.e. the marks 21 and 31 in fig. 1), so that the integration process is more convenient and efficient.
In one embodiment, the center thickness of the positive lens 2 and the negative lens 3 is greater than or equal to 1mm, and the positive lens 2 and the negative lens 3 are both made of optical resin or optical glass.
In this embodiment, the material of the positive lens 2 and the negative lens 3 is optical glass or optical resin, the center thickness of the positive lens 2 and the negative lens 3 is not less than 1mm, and the edge thickness of the positive lens 2 and the negative lens 3 depends on the specific diopter.
In a specific embodiment, the positive lens 2 and the negative lens 3 may be spherical lenses or aspherical lenses. In another specific embodiment, the material of the positive lens 2 and the negative lens 3 is optical glass or optical resin, and the refractive index of the positive lens 2 and the refractive index of the negative lens 3 are 1.4 to 1.7.
In one embodiment, the diopter of the positive lens 2 ranges from +10 diopters to +500 diopters, and the diopter of the negative lens 3 ranges from-10-M diopters to-500-M diopters, wherein-M is the myopic power of the human eye.
In this embodiment, if the imaging distance of the virtual image is set to L, the diopter F of the positive lens 2 can be determined according to the following formula:
if the myopic power of the human eye is-M (myopic is expressed as negative), the diopter of the negative lens 3 is-F-M, that is, the sum of the diopters of the positive lens 2 and the negative lens 3 is equal to the ametropia positive power-M of the user, so that the ametropia correction can be realized, and the problems of binocular convergence matching and myopic diopter can be solved. Meanwhile, in the future production process, the prescription power (i.e., the diopters of the positive lens 2 and the negative lens 3) can be customized according to the myopic power-M degrees of the user.
For example, for a system with an imaging distance L = in the range of 0.2M to 10M, the diopter F of the positive lens 2 is +10 to +500 degrees, and the diopter F of the negative lens 3 is-10 to-500-M degrees. In one embodiment, the positive lens 2 has a diopter of 200 degrees and the negative lens 3 has a diopter of-200-M degrees.
In one embodiment, the thickness of the air gap 4 is 0.1-0.2 mm.
In this embodiment, the air gap 4 with a thickness of 0.1-0.2 mm is used to prevent light from overflowing from the lens when the light is reflected in the optical waveguide sheet 1, which results in loss of light energy. In a specific embodiment, the air gap 4 has a thickness of 0.15mm.
In one embodiment, the refractive index of the optical waveguide sheet 1 is 1.8 to 1.9.
In this embodiment, the refractive index of the optical waveguide sheet 1 is set to 1.8 to 1.9, so that light has a good propagation effect.
In one embodiment, the antireflection film 11 is provided with a plurality of layers, and each layer has a thickness of λ/4 or λ/2, where λ is a wavelength at which light propagates in the corresponding layer.
In this embodiment, the antireflection film 11 needs to have a large antireflection function in a visible light band, and each film layer in the antireflection film 11 may have a different band or be made of a different coating material, so that each antireflection film can only reflect a specific wavelength. Considering that a plurality of projection optical machines with different wavelengths may be used in the process of manufacturing the AR glasses by using the optical waveguide sheet and the lens integrated lens provided in this embodiment, each wavelength of the projection optical machine may be anti-reflective by corresponding to a plurality of layers of anti-reflective films, and although the materials of each layer of anti-reflective film are not the same, the thickness of each layer of anti-reflective film is half or a quarter of the corresponding wavelength, i.e. λ/4 or λ/2.
In another embodiment, the refractive index of the antireflection film 11 is determined by the refractive indices of the gas (typically air) in the air gap 4 and the optical waveguide sheet 1. The relationship between the refractive index of the antireflection film 11, the refractive index of the gas in the air gap 4 on the same side thereof, and the refractive index of the optical waveguide sheet 1 is as follows:
wherein n is f Is a refractive index, n, of the antireflection film 11 0 Is a refractive index, n, of the optical waveguide sheet 1 s Is the refractive index of the gas in the air gap 4 on the same side as the antireflection film 11.
In an embodiment, in conjunction with fig. 5, the positive lens 2 and the negative lens 3 are both fresnel lenses.
In the embodiment, a fresnel lens is used as the positive lens 2 and the negative lens 3, the fresnel lens is different from a common spherical lens or an aspheric lens, the microstructure is formed by etching concentric circles with different radiuses from the center to the outside on one surface of the fresnel lens, and because the etching scale is in a micro-nano level, light penetrating through the fresnel lens can generate a diffraction effect, and different etching stripes can generate different diffraction effects. Therefore, the image formed by the Fresnel lens has no spherical aberration, so that the final integrated lens is very light and thin, and a user can wear the integrated lens more comfortably. In a specific embodiment, the thickness of the fresnel lens is less than 1mm.
Similarly, the positive lens 2 and the negative lens 3 are manufactured separately by gluing or mechanical assembly, and are provided in a detachable mode.
In addition, the fresnel lens is generally made of optical glass or optical resin having a refractive index of 1.4 to 1.7.
The embodiment of the utility model provides a still provide an AR glasses, include as above the integrated lens of optical waveguide piece and lens.
In this embodiment, the optical waveguide sheet and the lens integrated lens are applied to the diffractive optical waveguide part in the AR glasses, so that the optical performance of the diffractive optical waveguide in the AR display module can be improved, the exit pupil light beams can be corrected, the binocular images can be correctly overlapped, and the diopter wearer can be optically corrected.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the description of the method part. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. An optical waveguide sheet and lens integrated lens, comprising:
an optical waveguide sheet for conducting an image;
the positive lens and the negative lens are respectively arranged at the front end and the rear end of the optical waveguide sheet, and air gaps are reserved between the positive lens and the optical waveguide sheet and between the negative lens and the optical waveguide sheet;
wherein the positive lens is used for compensating the influence of the negative lens on the external environment, and the negative lens is used for correcting the image position and adapting the diopter of human eyes.
2. The integrated optical waveguide sheet and lens module as claimed in claim 1, wherein the optical waveguide sheet is coated with antireflection films at front and rear ends thereof.
3. The optical waveguide sheet-and-lens integrated lens of claim 1, wherein edge areas of the positive and negative lenses are provided with extensions toward the optical waveguide sheet.
4. The optical waveguide sheet and lens integrated eyeglass of claim 1, wherein the center thickness of the positive lens and the negative lens, both of which are made of optical resin or optical glass, is greater than or equal to 1mm.
5. The integrated optical waveguide sheet and lens eyeglass of claim 1, wherein the diopter of the positive lens ranges from +10 to +500 diopters, and the diopter of the negative lens ranges from-10 to-500 to-M diopters, where-M is the myopic power of the human eye.
6. The optical waveguide sheet and lens integrated lens of claim 1, wherein the air gap has a thickness of 0.1 to 0.2mm.
7. The optical waveguide sheet and lens integrated lens of claim 1, wherein the refractive index of the optical waveguide sheet is 1.8 to 1.9.
8. The integrated optical waveguide sheet and lens module according to claim 2, wherein the antireflection film has a plurality of layers, and each of the layers has a thickness of λ/4 or λ/2, where λ is a wavelength at which light propagates in the corresponding layer.
9. The optical waveguide sheet and lens integrated lens of claim 1, wherein the positive and negative lenses are each a fresnel lens.
10. AR glasses comprising the optical waveguide sheet according to any one of claims 1 to 9 and a lens integrated lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121090994.2U CN218037539U (en) | 2021-05-20 | 2021-05-20 | Optical waveguide piece and lens integrated lens and AR glasses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121090994.2U CN218037539U (en) | 2021-05-20 | 2021-05-20 | Optical waveguide piece and lens integrated lens and AR glasses |
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| Publication Number | Publication Date |
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| CN218037539U true CN218037539U (en) | 2022-12-13 |
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| CN202121090994.2U Active CN218037539U (en) | 2021-05-20 | 2021-05-20 | Optical waveguide piece and lens integrated lens and AR glasses |
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| CN (1) | CN218037539U (en) |
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- 2021-05-20 CN CN202121090994.2U patent/CN218037539U/en active Active
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