WO2023050944A1 - 贴膜方法和镜片组件 - Google Patents

贴膜方法和镜片组件 Download PDF

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Publication number
WO2023050944A1
WO2023050944A1 PCT/CN2022/102474 CN2022102474W WO2023050944A1 WO 2023050944 A1 WO2023050944 A1 WO 2023050944A1 CN 2022102474 W CN2022102474 W CN 2022102474W WO 2023050944 A1 WO2023050944 A1 WO 2023050944A1
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transparent substrate
optical lens
optical
film
lens
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PCT/CN2022/102474
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English (en)
French (fr)
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孙琦
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歌尔光学科技有限公司
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Publication of WO2023050944A1 publication Critical patent/WO2023050944A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements

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  • the invention relates to the technical field of optical display, in particular to a film sticking method and a lens assembly.
  • the head mounted display can provide users with immersive images, so it is widely used in medical, military, entertainment and other fields.
  • the image displayed on the display in the head-mounted display device is transmitted and magnified through the optical lens, and the image is received by the human eye and observed by the human eye. is a magnified virtual image.
  • it is necessary to install an optical film on the surface of the optical lens and the way of installing the optical film is to adopt the method of direct lamination.
  • the surface of the current optical lens usually has a curved surface design. Due to the influence of the curved surface, the film layer is prone to wrinkle during the process of attaching the optical film.
  • the present invention proposes a film sticking method, the film sticking method is applied to a lens assembly, the lens component includes an optical lens, a first transparent substrate and a first film layer, and the film sticking method includes:
  • the bent first transparent substrate is arranged on the optical surface of the optical lens.
  • the step of bending the first transparent substrate includes:
  • the step of bending the first transparent substrate includes:
  • the step of bending the first transparent substrate according to a preset bending shape includes:
  • the first transparent substrate is curved following the curved shape of the mold surface.
  • the step of arranging the bent first transparent substrate on the optical surface of the optical lens includes:
  • the processed first transparent substrate is glued to the light-emitting surface of the optical lens, wherein the optical surface of the optical lens includes a light-emitting surface and a light-incoming surface, and the first film layer includes successively along the propagation direction of light.
  • the lens assembly further includes a second transparent substrate and a second film layer, and the second film layer is a dichroic film;
  • the step of arranging the bent first transparent substrate on the optical surface of the optical lens it includes:
  • the bent second transparent substrate is glued to the light incident surface of the optical lens, wherein the surface of the second substrate facing the optical lens has the same shape as the light incident surface of the optical lens.
  • the step of arranging the bent first transparent substrate on the optical surface of the optical lens it includes:
  • a bonding pressure is applied to the first transparent substrate and the optical lens.
  • the present invention also provides a lens assembly, the lens assembly is assembled by the above-mentioned film sticking method, and the lens assembly includes:
  • the first transparent substrate, the first transparent substrate is arranged on the optical surface of the optical lens, the surface of the first transparent substrate facing the optical lens is a glued surface, the glued surface and the optical surface of the optical lens have the same shape;
  • the first film layer, the surface of the first transparent substrate facing away from the optical lens is the cladding surface, and the first film layer is arranged on the cladding surface of the first transparent substrate.
  • the first transparent substrate and the optical lens have the same refractive index.
  • the thickness of the first transparent substrate is T1, which satisfies 0.1mm ⁇ T1 ⁇ 0.5mm.
  • the first film layer is firstly pasted on the pasting surface of the first transparent substrate, and then the first transparent substrate is bent so that the glued surface of the first transparent substrate and the optical surface of the optical lens same shape. It can be seen that, before the first transparent substrate is bent, the first transparent substrate is a flat plate structure. At this time, the first film layer is pasted on the flat first transparent substrate to reduce wrinkles caused by surface curvature. Then it avoids the situation of directly pasting the film on the curved surface of the optical lens, and reduces the occurrence of film layer wrinkles.
  • Fig. 1 is a schematic flow chart of the first embodiment of the film sticking method of the present invention
  • Fig. 2 is a schematic flow chart of the second embodiment of the film sticking method of the present invention.
  • Fig. 3 is a schematic flow chart of the third embodiment of the film sticking method of the present invention.
  • FIG. 4 is a schematic flow diagram of a fourth embodiment of the film sticking method of the present invention.
  • FIG. 5 is a schematic flow chart of a fifth embodiment of the film sticking method of the present invention.
  • Fig. 6 is a schematic flow chart of the sixth embodiment of the film sticking method of the present invention.
  • Fig. 7 is a schematic flow chart of the seventh embodiment of the film sticking method of the present invention.
  • Figure 8 is a schematic structural view of the first film layer in the present invention.
  • FIG. 9 is a schematic structural view of the first transparent substrate and the first film layer in the present invention.
  • FIG. 10 is a schematic structural view of the bent first transparent substrate in the present invention.
  • Fig. 11 is a schematic diagram of the enlarged structure of part A in Fig. 10;
  • Fig. 12 is a schematic structural view of the cut first transparent substrate in the present invention.
  • Fig. 13 is a schematic structural view of the first transparent substrate and the second transparent substrate of the optical lens in the present invention.
  • label name label name 10 first layer 20 first transparent substrate 110 polarizing film 30 Optical lenses 120 polarized reflective film 40 second layer 130 quarter wave plate 50 second transparent substrate
  • connection and “fixation” should be understood in a broad sense, for example, “fixation” can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined.
  • fixation can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined.
  • the display principle of the head-mounted display device includes AR (Augmented Reality, Augmented Reality) display and VR (Virtual Reality, Virtual Reality) display.
  • AR Augmented Reality
  • VR Virtual Reality, Virtual Reality
  • the film layer is abutted and pressed by the rubber head, and the film layer is pasted on the surface of the lens. Due to the different design of the curved surface of the optical lens, it may be a free-form surface or an aspherical surface. Wrinkles of the film layer are easy to appear during the process of attaching the optical film.
  • this embodiment proposes a film-attaching method.
  • the film-attaching method is applied to a lens assembly, and the lens assembly can be applied to an AR display or a VR display.
  • the lens assembly includes an optical lens 30 , a first transparent substrate 20 and a first film layer 10 .
  • the optical lens 30 can be a single lens, or a lens group composed of multiple lenses.
  • the first film layer 10 can be a single film layer, or a film system structure composed of multiple single film layers.
  • the first film layer 10 is disposed on the optical lens 30 .
  • Lamination methods include:
  • Step S10 attaching the first film layer to the coating surface of the first transparent substrate, wherein the first transparent substrate includes a glued surface facing the optical lens and a coating surface facing away from the optical lens; referring to Fig. 8 and Fig. 9, it can be understood that the first transparent substrate is a plate-shaped structure, and the first transparent substrate has two opposite plate surfaces. Among them, the board surface facing the optical lens is the glued surface, and the board surface facing away from the optical lens is the cladding surface. Before the first transparent substrate is bent, the first film layer is pasted on the pasting surface of the first substrate. At this time, because the surface of the pasting surface of the first substrate is flat, when the first film layer is pasted, there will be no Wrinkled case.
  • Step S20 bending the first transparent substrate so that the glued surface of the first transparent substrate and the optical surface of the optical lens have the same shape; surface of the lens.
  • the first transparent substrate is bent so that the glued surface of the first transparent substrate is in the same shape as the optical surface on which the first transparent substrate is installed. Two surfaces with the same surface type can be bonded together to minimize the gap between them.
  • Step S30 disposing the bent first transparent substrate on the optical surface of the optical lens.
  • Optical glue is arranged on the opposite surface of the first transparent substrate or the optical lens, and after the first transparent substrate is installed on the optical lens, the bonding of the two is completed through the optical glue.
  • the bending of the first transparent substrate may be thermal bending, mechanical bending, or a combination of both.
  • the first film layer 10 is pasted on the pasting surface of the first transparent substrate 20, and then the first transparent substrate 20 is bent so that the glued surface of the first transparent substrate 20 and the The optical surface shapes of the optical lenses 30 are the same. It can be seen that, before the first transparent substrate 20 is bent, the first transparent substrate 20 is a flat plate structure. At this time, the first film layer 10 is pasted on the flat first transparent substrate 20 to reduce wrinkles caused by surface curvature. Then, the situation of directly pasting the film on the curved surface of the optical lens 30 is avoided, and the occurrence of film layer wrinkles is reduced.
  • a second embodiment of the film-attaching method is proposed.
  • the position of the edge of the first film layer 10 composed of multiple film layers is uneven due to the bending tension.
  • the step of bending the first transparent substrate it includes:
  • Step S40 cutting the edge of the first transparent substrate coated with the first film layer, and aligning the edge of the first film layer with the edge of the first transparent substrate.
  • the cutting method can be laser cutting or knife cutting. Referring to FIG. 12 , it can be seen that the edge positions of the cut first film layer 10 and the first transparent substrate 20 are aligned. In addition, in the process of sticking the film, the edge position is also a position that is prone to wrinkles. By cutting, the position where there may be wrinkles can be further cut off.
  • the step of bending the first transparent substrate includes:
  • Step S210 bending the first transparent substrate according to a preset bending shape.
  • the shape of the optical surface of the optical lens is already fixed, and the preset curved shape can be understood as the shape of the glued surface of the optical lens.
  • pressure is applied to both ends of the first transparent substrate according to a preset angle to perform bending.
  • the preset curved shape is preset and can be adjusted according to the shape of the optical surface of the optical lens. Completing the bending of the first transparent substrate through the preset bending shape can ensure that the processed optical lenses have the same shape.
  • the step of bending the first transparent substrate according to a preset bending shape includes:
  • Step S211 heating the first transparent substrate, and abutting the glued surface of the first transparent substrate against a preset mold surface, wherein the curved shape of the mold surface is the same as the shape of the optical surface of the optical lens.
  • the first transparent substrate can be softened by heating, and the softened first transparent substrate is placed on the mold, so as to reduce the internal stress and prevent the first transparent substrate from cracking or breaking during the bending process. cracked, reducing the brittleness of the first transparent substrate.
  • Step S212 bending the first transparent substrate according to the curved shape of the mold surface.
  • the softened first transparent substrate is placed on the surface of the mold.
  • the curved shape of the surface of the mold is fixed, and molds with different specifications are required to process the first transparent substrate with different curved shapes.
  • the step of arranging the bent first transparent substrate on the optical surface of the optical lens includes:
  • Step S310 gluing the processed first transparent substrate to the light-emitting surface of the optical lens, wherein the optical surface of the optical lens includes a light-emitting surface and a light-incoming surface, and the first film layer includes a quarter of the film arranged in sequence along the propagation direction of the light.
  • Waveplates, Polarized Reflective Films and Polarizing Films The function of the quarter-wave plate is to change the polarization state of the light, for example, convert the light in the linear polarization state into the light in the circular polarization state, or convert the light in the circular polarization state into the linear polarization state.
  • the polarizing reflection film has a polarization transmission axis, and when the polarization direction of the light is the same as the polarization transmission axis, the light can pass through the polarization reflection film. If the angle between the polarization direction of the light and the polarization transmission axis is 90°, the light is reflected. In addition, during the transmission of light, some of the light will directly pass through the polarized reflective film, and this part of the light will form stray light. In order to effectively eliminate stray light, a polarizing film is provided, and the transmission axis of the polarizing film is in the same direction as the transmission axis of the polarizing reflection film. The light passing through the polarizing reflective film can be filtered by the polarizing film, and the light with a vibration direction different from the transmission axis of the polarizing reflective film will be filtered out.
  • the lens assembly also includes a second transparent substrate and a second film layer, the second film layer is a dichroic film; as shown in FIG. 13 , the optical lens 30 has two optical surfaces, one is a light incident surface, and the other is a light exit surface. There are situations where both the light incident surface and the light exit surface are aspherical or free-form surfaces. At this time, if optical films are provided on both surfaces, there may be wrinkles on the surface of the lens.
  • the first transparent substrate 20 is arranged on the light-emitting surface of the optical lens 30, and the second transparent substrate 50 is arranged on the light-incident surface of the optical lens 30. Therefore, the occurrence of film layer wrinkles on the two surfaces of the optical lens 30 is reduced.
  • the lens assembly constitutes a catadioptric light path, and the catadioptric film ensures the catadioptric reflection of light.
  • the light incident from the light incident surface of the optical lens is circularly polarized light.
  • the step of placing the bent first transparent substrate on the optical surface of the optical lens it includes:
  • Step S50 sticking the second film layer on the surface of the second substrate; wherein, the surface of the second substrate on which the second film layer is disposed may face the optical lens, or may be disposed away from the optical lens.
  • the plate surface of the second substrate is a flat surface, and the flat surface ensures that the wrinkles of the film layer are reduced when the second film layer is pasted.
  • Step S60 bending the second transparent substrate; after applying the second film layer, bending the second transparent substrate, so as to ensure that the surface of the second transparent substrate has the same surface structure as the corresponding optical lens .
  • Step S70 glueing the bent second transparent substrate to the light-incident surface of the optical lens, wherein the surface of the second substrate facing the optical lens has the same shape as the light-incident surface of the optical lens.
  • the same shape can reduce the gap between the second substrate 50 and the optical lens 30 .
  • a seventh embodiment of the film-attaching method is proposed. After the step of placing the bent first transparent substrate on the optical surface of the optical lens, it includes:
  • Step S80 applying a bonding pressure to the first transparent substrate and the optical lens.
  • a pressing force is applied to the outside of the first transparent substrate and the optical lens, and the optical glue can be fully filled in the position between the first transparent substrate and the optical lens during the extrusion process. The air between the two is excluded, and the bonding firmness of the first transparent substrate and the optical lens is improved.
  • this embodiment also provides a lens assembly.
  • the lens assembly is assembled by the above-mentioned film attachment method.
  • the lens assembly includes: an optical lens 30 , a first transparent substrate 20 and a first film layer 10 .
  • the first transparent substrate 20 is disposed on the surface of the optical lens 30
  • the first film layer 10 is disposed on a side of the first transparent substrate 20 away from the optical lens 30 .
  • the first transparent substrate 20 is arranged on the optical surface of the optical lens 30, and the surface of the first transparent substrate 20 facing the optical lens 30 is a glued surface, and the shape of the glued surface is the same as the optical surface of the optical lens 30; the first transparent substrate 20 faces away from the optical lens
  • the surface of 30 is the cladding surface, and the first film layer 10 is disposed on the cladding surface of the first transparent substrate 20 .
  • the shape of the glued surface of the first transparent substrate 20 is the same as that of the optical surface of the optical lens 30 .
  • a gap between the optical lens 30 and the first transparent substrate 20 can be reduced.
  • the first transparent substrate 20 and the optical lens 30 have the same refractive index.
  • the refractive index is the same, when the light passes through the first transparent substrate 20 and the optical lens 30, the light will not be deflected, ensuring that the optical characteristics of the light will not change.
  • the first transparent substrate 20 is glass, and the optical lens 30 is glass of the same material.
  • the first transparent substrate 20 is optical plastic, and the optical lens 30 is optical plastic of the same material.
  • the optical plastic is easy to process, and the first transparent substrate 20 and the second transparent substrate 50 are injection molded by optical plastic, so that the internal stress of the first transparent substrate 20 and the second transparent substrate 50 is small, and the first transparent substrate 20 and the second transparent substrate 50 are less stressed when bending the first transparent substrate.
  • the substrate 20 or the second transparent substrate 50 is also easy to bend, and it is also easier to bend when heated.
  • the thickness of the first transparent substrate 20 is T1, which satisfies 0.1 mm ⁇ T1 ⁇ 0.5 mm. If the thickness is less than 0.1 mm, the thickness of the first transparent substrate 20 is too thin, fragile, and difficult to support the first film layer 10 . If the thickness is greater than 0.5 mm, the thickness of the first transparent substrate 20 is too thick, the first substrate is difficult to bend, and processing is inconvenient. For this, the thickness of the first transparent substrate 20 is between 0.1mm and 0.5mm. Within this thickness range, it can be ensured that the first transparent substrate 20 is easy to bend and at the same time can provide sufficient supporting force to the first film layer 10 . Similarly, the thickness of the second transparent substrate 50 is T2, and the thickness of the second transparent substrate 50 can also be within a range of 0.1 mm to 0.5 mm.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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Abstract

一种贴膜方法和镜片组件。贴膜方法应用于镜片组件，镜片组件包括光学镜片（30）、第一透明基板（20）和第一膜层（10），贴膜方法包括：将第一膜层（10）贴覆于第一透明基板（20）的贴覆面，其中，第一透明基板（20）包括面向光学镜片（30）的胶合面和背离光学镜片（30）的贴覆面；对第一透明基板（20）进行弯折处理，以使第一透明基板（20）的胶合面和光学镜片（30）的光学面形状相同；将弯折处理后的第一透明基板（20）设于光学镜片（30）的光学面，完成光学镜片（30）的曲面贴膜，减少褶皱情况的发生。

Description

贴膜方法和镜片组件 技术领域
本发明涉及光学显示技术领域，尤其涉及一种贴膜方法和镜片组件。
背景技术
在头戴显示设备(Head Mount Display)能够为用户提供身临其境的影像，从而在医疗、军事、娱乐等领域广泛应用。随着先进光学设计及加工技术、显示技术及处理器的发展和升级，头戴显示设备中的显示器所显示的图像通过光学镜片的传递和放大，其图像被人眼所接收，人眼观察到的是放大的虚像。而为了能够顺利实现图像的放大解析，需要在光学镜片的表面设置光学膜，设置光学膜的方式采用直接贴覆的方式。但是目前的光学镜片的表面通常存在曲面设计，由于曲面的影响，在贴覆光学膜的过程中容易出现膜层褶皱。
发明内容
基于此，针对目前在光学镜片的曲面贴覆光学膜容易导致膜层褶皱的问题，有必要提供一种贴膜方法和镜片组件，旨在能够完成光学镜片的曲面贴膜，减少褶皱情况的发生。
为实现上述目的，本发明提出一种贴膜方法，所述贴膜方法应用于镜片组件，所述镜片组件包括光学镜片、第一透明基板和第一膜层，所述贴膜方法包括：
将第一膜层贴覆于第一透明基板的贴覆面，其中，所述第一透明基板包括面向所述光学镜片的胶合面和背离所述光学镜片的贴覆面；
对所述第一透明基板进行弯折处理，以使所述第一透明基板的胶合面和所述光学镜片的光学面形状相同；
将弯折处理后的所述第一透明基板设于所述光学镜片的光学面。
可选地，所述对所述第一透明基板进行弯折处理的步骤之后，包括：
对贴覆了所述第一膜层的所述第一透明基板的边缘进行裁切，将所述第一膜层的边缘和所述第一透明基板的边缘对齐。
可选地，所述对所述第一透明基板进行弯折处理的步骤，包括：
按照预设的弯曲形状对所述第一透明基板进行弯曲处理。
可选地，所述按照预设的弯曲形状对所述第一透明基板进行弯曲处理的步骤，包括：
对所述第一透明基板进行加热，将所述第一透明基板的胶合面抵接于预设的模具表面，其中，所述模具表面的弯曲形状和所述光学镜片的光学面形状相同；
按照所述模具表面的弯曲形状弯曲所述第一透明基板。
可选地，所述将弯折处理后的所述第一透明基板设于所述光学镜片的光学面的步骤，包括：
将处理后的所述第一透明基板胶合于所述光学镜片的出光面，其中，所述光学镜片的光学面包括出光面和入光面，所述第一膜层包括沿光线的传播方向依次设置四分之一波片、偏振反射膜和偏光膜。
可选地，所述镜片组件还包括第二透明基板和第二膜层，所述第二膜层为分光膜；
所述将弯折处理后的所述第一透明基板设于所述光学镜片的光学面的步骤之后，包括：
将第二膜层贴覆于第二基板的板面；
对所述第二透明基板进行弯折处理；
将弯折处理后的所述第二透明基板胶合于所述光学镜片的入光面，其中所述第二基板面向所述光学镜片的板面和所述光学镜片的入光面的形状相同。
可选地，所述将弯折处理后的所述第一透明基板设于所述光学镜片的光学面的步骤之后，包括：
对所述第一透明基板和所述光学镜片施加胶合压力。
此外，为了解决上述问题，本发明还提供一种镜片组件，所述镜片组件通过如上文所述的贴膜方法组装，所述镜片组件包括：
光学镜片；
第一透明基板，所述第一透明基板设于所述光学镜片的光学面，所述第一透明基板面向所述光学镜片的表面为胶合面，所述胶合面与所述光学镜片的光学面的形状相同；以及
第一膜层，所述第一透明基板背离所述光学镜片的表面为贴覆面，所述第一膜层设于所述第一透明基板的贴覆面。
可选地，所述第一透明基板和所述光学镜片的折射率相同。
可选地，所述第一透明基板的厚度为T1，则满足0.1mm≤T1≤0.5mm。
本发明提出的技术方案中，先将第一膜层贴覆在第一透明基板的贴覆面，在对第一透明基板进行弯折处理，使第一透明基板的胶合面和光学镜片的光学面形状相同。由此可知，在第一透明基板弯折前，第一透明基板是一个平板结构。此时，在平整的第一透明基板上完成第一膜层的贴覆，减少由于表面弯曲造成的褶皱。继而避免了在光学镜片的曲面直接贴膜的情况，减少膜层褶皱的发生。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明贴膜方法第一实施例的流程示意图；
图2为本发明贴膜方法第二实施例的流程示意图；
图3为本发明贴膜方法第三实施例的流程示意图；
图4为本发明贴膜方法第四实施例的流程示意图；
图5为本发明贴膜方法第五实施例的流程示意图；
图6为本发明贴膜方法第六实施例的流程示意图；
图7为本发明贴膜方法第七实施例的流程示意图；
图8为本发明中第一膜层的结构示意图；
图9为本发明中第一透明基板和第一膜层的结构示意图；
图10为本发明中第一透明基板弯折后的结构示意图；
图11为图10中A部分的放大结构示意图；
图12为本发明中第一透明基板裁切后的结构示意图；
图13为本发明中光学镜片第一透明基板和第二透明基板的结构示意图。
附图标号说明：
标号 名称 标号 名称
10 第一膜层 20 第一透明基板
110 偏光膜 30 光学镜片
120 偏振反射膜 40 第二膜层
130 四分之一波片 50 第二透明基板
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，本发明实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，在本发明中如涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
另外，本发明各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
在相关技术中，在头戴显示设备的显示原理包括AR(Augmented Reality，增强现实)显示和VR(Virtual Reality，虚拟现实)显示。在贴膜的过程中，将膜层通过橡胶头抵接压合，将膜层贴合在镜片的表面。由于光学镜片的曲面设计不同，可能是自由曲面，或者是非球面。在贴覆光学膜的过程中容易出现膜层褶皱。
为了解决上述问题，参阅图1所示，本实施例提出一种贴膜方法，贴膜方法应用于镜片组件，镜片组件可以应用在AR显示中，也可以应用在VR显示中。镜片组件包括光学镜片30、第一透明基板20和第一膜层10。光学镜片30可以是单一镜片，也可以是多个镜片组成的镜片组。第一膜层10可以是单一膜层，也可以是多个单一膜层组成的膜系结构。第一膜层10设置在光学镜片30。贴膜方法包括：
步骤S10，将第一膜层贴覆于第一透明基板的贴覆面，其中，第一透明基板包括面向光学镜片的胶合面和背离光学镜片的贴覆面；参阅图8和图9所示，可以理解的是，第一透明基板为板状结构，第一透明基板具有相对设置的两个板面。其中，面向光学镜片的板面为胶合面，背离光学镜片的板面为贴覆面。在第一透明基板弯折前，将第一膜层贴覆在第一基板的贴覆面上，此时由于第一基板的贴覆面表面平整，在贴覆第一膜层的时候，不会出现褶皱的情况。
步骤S20，对第一透明基板进行弯折处理，以使第一透明基板的胶合面和光学镜片的光学面形状相同；在完成膜层的贴覆工作后，需要将第一透明基 板设置在光学镜片的表面。为了减少第一透明基板和光学镜片之间产生空隙，对第一透明基板进行弯折处理，使第一透明基板的胶合面和相应安装第一透明基板的光学面形状相同。面型相同的两个面贴合，可以尽可能的减少两者之间的空隙。
步骤S30，将弯折处理后的第一透明基板设于光学镜片的光学面。在第一透明基板或光学镜片的相对面设置光学胶，将第一透明基板安装在光学镜片后，通过光学胶完成两者的粘合。另外，对第一透明基板的弯折，可以是热弯折，也可以是机械弯折，还可以是两者结合起来发挥作用。
本实施例提出的技术方案中，先将第一膜层10贴覆在第一透明基板20的贴覆面，在对第一透明基板20进行弯折处理，使第一透明基板20的胶合面和光学镜片30的光学面形状相同。由此可知，在第一透明基板20弯折前，第一透明基板20是一个平板结构。此时，在平整的第一透明基板20上完成第一膜层10的贴覆，减少由于表面弯曲造成的褶皱。继而避免了在光学镜片30的曲面直接贴膜的情况，减少膜层褶皱的发生。
参阅图2所示，在贴膜方法的第一实施例的基础上，提出贴膜方法的第二实施例。参阅图10和图11所示，在第一透明基板20弯折后，由于弯折的张力影响，多个膜层组成的第一膜层10的边缘位置出现参差不齐的情况。为了保证两边对齐，对第一透明基板进行弯折处理的步骤之后，包括：
步骤S40，对贴覆了第一膜层的第一透明基板的边缘进行裁切，将第一膜层的边缘和第一透明基板的边缘对齐。裁切的方式可以采用激光切割的方式，也可以采用刀具切割的方式。参阅图12所示，可见裁切后的第一膜层10和第一透明基板20的边缘位置是对齐的。另外，在贴膜的过程中，边缘位置也是容易褶皱的位置，通过裁切的方式，还可以进一步将可能存在褶皱的位置裁切掉。
参阅图3所示，在贴膜方法的第一实施例的基础上，提出贴膜方法的第三实施例。对第一透明基板进行弯折处理的步骤，包括：
步骤S210，按照预设的弯曲形状对第一透明基板进行弯曲处理。光学镜片的光学面的形状是已经固定的，预设的弯曲形状就可以理解为是光学镜片的胶合面的形状。比如，按照预设的角度去对第一透明基板的两端施加压力，进行弯折。预设的弯曲形状是预先设置的，可以根据光学镜片的光学面的形 状进行调整。通过预设的弯曲形状完成对第一透明基板的弯曲可以保证加工出的光学镜片的形状相同。
参阅图4所示，在贴膜方法的第三实施例的基础上，提出贴膜方法的第四实施例。按照预设的弯曲形状对第一透明基板进行弯曲处理的步骤，包括：
步骤S211，对第一透明基板进行加热，将第一透明基板的胶合面抵接于预设的模具表面，其中，模具表面的弯曲形状和光学镜片的光学面形状相同。通过加热的方式可以软化第一透明基板，将软化的第一透明基板放置于模具上，从而减少的内应力，避免第一透明基板在弯折的过程中，第一透明基板出现裂纹或者是碎裂掉，降低第一透明基板的脆性。
步骤S212，按照模具表面的弯曲形状弯曲第一透明基板。软化的第一透明基板放置在模具的表面。模具的表面弯曲形状是固定的，加工出不同弯曲形状的第一透明基板的需要设置不同规格的模具。
参阅图5所示，在贴膜方法的上述实施例的基础上，提出贴膜方法的第五实施例。将弯折处理后的第一透明基板设于光学镜片的光学面的步骤，包括：
步骤S310，将处理后的第一透明基板胶合于光学镜片的出光面，其中，光学镜片的光学面包括出光面和入光面，第一膜层包括沿光线的传播方向依次设置四分之一波片、偏振反射膜和偏光膜。四分之一波片的作用在于改变光线的偏振状态，例如，将线偏振状态的光线转化为圆偏振状态的光线，或者是将圆偏振状态的光线转化为线偏振光。偏振反射膜具有一个偏振透过轴，光线的偏振方向和偏振透过轴相同时，光线可以穿过偏振反射膜。如果光线的偏振方向和偏振透过轴夹角为90°，则光线被反射。另外，光线在传递的过程中，有部分光线会直接穿过偏振反射膜，这部分光线的会形成杂散光。为了有效的消除掉杂散光设置偏光膜，偏光膜的透过轴与偏振反射膜的透过轴方向相同。通过偏光膜可以对经过偏振反射膜的光线进行过滤，与偏振反射膜的透过轴振动方向不同的光线会被过滤掉。
参阅图6所示，在贴膜方法的第五实施例的基础上，提出贴膜方法的第六实施例。镜片组件还包括第二透明基板和第二膜层，第二膜层为分光膜；参阅图13所示，光学镜片30的有两个光学面，一个是入光面，另一个是出光面。存在入光面和出光面均为非球面或者是自由曲面的情况，此时，如果两个面均设置光学膜，则镜片的表面均可能存在褶皱的情况。为此，第一透明基板 20设置在光学镜片30的出光面，第二透明基板50设置在光学镜片30的入光面。从而减少在光学镜片30的两个表面出现膜层褶皱的情况。本实施例中，镜片组件构成折反射光路，通过分光膜保证光线的折反射。由光学镜片的入光面射入的光线为圆偏振光。
将弯折处理后的第一透明基板设于光学镜片的光学面的步骤之后，包括：
步骤S50，将第二膜层贴覆于第二基板的板面；其中，第二膜层设置第二基板的板面可以是面向光学镜片设置，也可以是背向光学镜片设置。此时，第二基板的板面是一个平整的表面，通过平整的表面保证在贴覆第二膜层的时候，减少膜层的褶皱。
步骤S60，对第二透明基板进行弯折处理；在贴覆完第二膜层后，对第二透明基板进行弯折处理，如此，保证第二透明基板的表面和相应光学镜片的表面结构相同。
步骤S70，将弯折处理后的第二透明基板胶合于光学镜片的入光面，其中第二基板面向光学镜片的板面和光学镜片的入光面的形状相同。形状相同可以减少第二基板50和光学镜片30之间的空隙。需要指出的是，第二膜层40的粘贴方法可以参照步骤S10，步骤S20和步骤S30。
参阅图7所示，在贴膜方法的第五实施例的基础上，提出贴膜方法的第七实施例。将弯折处理后的第一透明基板设于光学镜片的光学面的步骤之后，包括：
步骤S80，对第一透明基板和光学镜片施加胶合压力。在胶合的过程中，对第一透明基板和光学镜片的外侧施加挤压力，在挤压的过程中能够使光学胶充分的填充在第一透明基板和光学镜片之间的位置。排除两者之间的空气，提高第一透明基板和光学镜片的胶合牢固程度。
再次参阅图13所示，本实施例还提供一种镜片组件，镜片组件通过如上文的贴膜方法组装，镜片组件包括：光学镜片30、第一透明基板20和第一膜层10。第一透明基板20设置在光学镜片30的表面，第一膜层10设置在第一透明基板20背离光学镜片30的一侧。
第一透明基板20设于光学镜片30的光学面，第一透明基板20面向光学镜片30的表面为胶合面，胶合面与光学镜片30的光学面的形状相同；第一透明 基板20背离光学镜片30的表面为贴覆面，第一膜层10设于第一透明基板20的贴覆面。
本实施例提出的技术方案中，通过使第一透明基板20的胶合面和光学镜片30的光学面形状相同。可以减少光学镜片30和第一透明基板20之间的空隙。
在本申请的上述实施例中，第一透明基板20和光学镜片30的折射率相同。折射率相同，光线在经过第一透明基板20和光学镜片30时，光线不会发生偏折，保证光线光学特性不会发生变化。第一透明基板20是玻璃，则光学镜片30是相同材质的玻璃。第一透明基板20是光学塑料，则光学镜片30是相同材质的光学塑料。另外，光学塑料易于加工，且通过光学塑胶注塑成型第一透明基板20和第二透明基板50，如此，第一透明基板20和第二透明基板50的内部应力较小，在弯折第一透明基板20或者第二透明基板50时，也易于弯折，在受热时也更易弯曲。
在本申请的上述实施例中，第一透明基板20的厚度为T1，则满足0.1mm≤T1≤0.5mm。如果厚度小于0.1mm，则第一透明基板20的厚度太薄，易损，且难以支撑第一膜层10。如果厚度大于0.5mm，则第一透明基板20的厚度太厚，第一第一基板难以弯折，不便加工。为此，第一透明基板20的厚度在0.1mm至0.5mm之间。在这个厚度范围内，可以保证，第一透明基板20易于弯折，同时还能够给第一膜层10足够的支撑力。同样地，第二透明基板50的厚度为T2，第二透明基板50的厚度也可以满足在0.1mm至0.5mm之间。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (10)

  1. 一种贴膜方法，其特征在于，所述贴膜方法应用于镜片组件，所述镜片组件包括光学镜片、第一透明基板和第一膜层，所述贴膜方法包括：
    将第一膜层贴覆于第一透明基板的贴覆面，其中，所述第一透明基板包括面向所述光学镜片的胶合面和背离所述光学镜片的贴覆面；
    对所述第一透明基板进行弯折处理，以使所述第一透明基板的胶合面和所述光学镜片的光学面形状相同；
    将弯折处理后的所述第一透明基板设于所述光学镜片的光学面。
  2. 如权利要求1所述的贴膜方法，其特征在于，所述对所述第一透明基板进行弯折处理的步骤之后，包括：
    对贴覆了所述第一膜层的所述第一透明基板的边缘进行裁切，将所述第一膜层的边缘和所述第一透明基板的边缘对齐。
  3. 如权利要求1所述的贴膜方法，其特征在于，所述对所述第一透明基板进行弯折处理的步骤，包括：
    按照预设的弯曲形状对所述第一透明基板进行弯曲处理。
  4. 如权利要求3所述的贴膜方法，其特征在于，所述按照预设的弯曲形状对所述第一透明基板进行弯曲处理的步骤，包括：
    对所述第一透明基板进行加热，将所述第一透明基板的胶合面抵接于预设的模具表面，其中，所述模具表面的弯曲形状和所述光学镜片的光学面形状相同；
    按照所述模具表面的弯曲形状弯曲所述第一透明基板。
  5. 如权利要求1至4中任一项所述的贴膜方法，其特征在于，所述将弯折处理后的所述第一透明基板设于所述光学镜片的光学面的步骤，包括：
    将处理后的所述第一透明基板胶合于所述光学镜片的出光面，其中，所述光学镜片的光学面包括出光面和入光面，所述第一膜层包括沿光线的传播 方向依次设置四分之一波片、偏振反射膜和偏光膜。
  6. 如权利要求5所述的贴膜方法，其特征在于，所述镜片组件还包括第二透明基板和第二膜层，所述第二膜层为分光膜；
    所述将弯折处理后的所述第一透明基板设于所述光学镜片的光学面的步骤之后，包括：
    将第二膜层贴覆于第二基板的板面；
    对所述第二透明基板进行弯折处理；
    将弯折处理后的所述第二透明基板胶合于所述光学镜片的入光面，其中所述第二基板面向所述光学镜片的板面和所述光学镜片的入光面的形状相同。
  7. 如权利要求5所述的贴膜方法，其特征在于，所述将弯折处理后的所述第一透明基板设于所述光学镜片的光学面的步骤之后，包括：
    对所述第一透明基板和所述光学镜片施加胶合压力。
  8. 一种镜片组件，其特征在于，所述镜片组件通过如权利要求1至7中任一项所述的贴膜方法组装，所述镜片组件包括：
    光学镜片；
    第一透明基板，所述第一透明基板设于所述光学镜片的光学面，所述第一透明基板面向所述光学镜片的表面为胶合面，所述胶合面与所述光学镜片的光学面的形状相同；以及
    第一膜层，所述第一透明基板背离所述光学镜片的表面为贴覆面，所述第一膜层设于所述第一透明基板的贴覆面。
  9. 如权利要求8所述的镜片组件，其特征在于，所述第一透明基板和所述光学镜片的折射率相同。
  10. 如权利要求8所述的镜片组件，其特征在于，所述第一透明基板的厚度为T1，则满足0.1mm≤T1≤0.5mm。
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