Preparation method of polarization body holographic device and polarization body holographic device

Abstract

The invention relates to the technical field of optical devices, and provides a preparation method of a polarizer holographic device and the polarizer holographic device, and the method comprises the steps: arranging an orientation layer on a first surface of a substrate layer; arranging a liquid crystal layer on the surface of one side, deviating from the substrate layer, of the orientation layer to obtain an intermediate; and connecting the connecting curved surface of the device layer with the liquid crystal layer of the intermediate to obtain the polarizer holographic device.

Description

Technical Field

[0001] The present application relates to the technical field of optical devices, and in particular to a method for preparing a polarization holographic device and a polarization holographic device. Background Art

[0002] Polarization volume holographic devices are new optical devices that have emerged in recent years. For example, polarization volume holographic devices include polarization volume holographic gratings, polarization volume holographic lenses, etc. Polarization volume holographic devices have the significant advantages of high diffraction efficiency, wide wavelength bandwidth and wide angle bandwidth.

[0003] However, in the related art, the polarization hologram device is usually prepared on a flat substrate layer, and the prepared polarization hologram device is a flat polarization hologram device, which is not conducive to the integration of the polarization hologram device with a curved refractive or reflective optical device. When a flat polarization hologram device is combined with a curved optical device, such as a curved refractive or reflective optical device, into an optical system, the flat polarization hologram device cannot be bonded to the curved surface of the curved optical device in the optical system, which is not conducive to reducing the volume of the optical system. Summary of the invention

[0004] The main purpose of the present application is to provide a method for preparing a polarization holographic device and a polarization holographic device, aiming to solve the technical problem that when a plane polarization holographic device and a curved optical device are combined into an optical system, the plane polarization holographic device cannot fit the curved surface of the curved optical device in the optical system, resulting in a large volume of the optical system.

[0005] In a first aspect, an embodiment of the present application provides a method for preparing a polarization volume holographic device, comprising:

[0006] Disposing an alignment layer on the first surface of the base layer;

[0007] Disposing a liquid crystal layer on the surface of the alignment layer away from the substrate layer to obtain an intermediate;

[0008] The connecting curved surface of the device layer is connected to the liquid crystal layer of the intermediate to obtain a polarizer holographic device; wherein the connecting curved surface is used to make the surface curvature of the substrate layer in the polarizer holographic device different from the surface curvature of the substrate layer in the intermediate, the surface curvature of the orientation layer in the polarizer holographic device different from the surface curvature of the orientation layer in the intermediate, and the surface curvature of the liquid crystal layer in the polarizer holographic device different from the surface curvature of the liquid crystal layer in the intermediate.

[0009] In a second aspect, the present application also provides a polarization holographic device, including:

[0010] basal layer;

[0011] An alignment layer, the alignment layer being disposed on the first surface of the base layer;

[0012] a liquid crystal layer, the liquid crystal layer being arranged on a surface of the alignment layer facing away from the substrate layer; and

[0013] The device layer has a connecting curved surface connected to the liquid crystal layer; the connecting curved surface is used to make the surface curvature of the substrate layer in the polarization hologram device different from the surface curvature of the substrate layer before the liquid crystal layer is connected to the connecting curved surface, the surface curvature of the orientation layer in the polarization hologram device is different from the surface curvature of the orientation layer before the liquid crystal layer is connected to the connecting curved surface, and the surface curvature of the liquid crystal layer in the polarization hologram device is different from the surface curvature of the liquid crystal layer before the liquid crystal layer is connected to the connecting curved surface.

[0014] In a third aspect, the embodiment of the present application further provides a polarization volume holographic device, wherein the polarization volume holographic device at least comprises:

[0015] a liquid crystal layer; and

[0016] A device layer, wherein a connection curved surface of the device layer is connected to the liquid crystal layer; a surface curvature of the liquid crystal layer in the polarization holographic device is different from a surface curvature of the liquid crystal layer before the liquid crystal layer is connected to the connection curved surface;

[0017] The polarization holographic device is obtained by peeling off at least one of the base layer and the alignment layer included in the polarization holographic device provided in the embodiment of the present application.

[0018] The embodiment of the present application provides a method for preparing a polarizer holographic device and a polarizer holographic device. The method for preparing the polarizer holographic device comprises: setting an orientation layer on a first surface of a substrate layer; setting a liquid crystal layer on a surface of the orientation layer away from the substrate layer to obtain an intermediate; connecting a connecting curved surface of the device layer with the liquid crystal layer of the intermediate to obtain a polarizer holographic device; wherein the connecting curved surface is used to make the surface curvature of the substrate layer in the polarizer holographic device different from the surface curvature of the substrate layer in the intermediate, the surface curvature of the orientation layer in the polarizer holographic device different from the surface curvature of the orientation layer in the intermediate, and the surface curvature of the liquid crystal layer in the polarizer holographic device different from the surface curvature of the liquid crystal layer in the intermediate.

[0019] Under the action of the connecting surface, the surface curvature of the substrate layer, the orientation layer and the liquid crystal layer in the intermediate body are all changed, that is, they are changed according to the curvature of the connecting surface, which is equivalent to that the polarizer holographic device can be prepared on the curved substrate. Correspondingly, the polarizer holographic device prepared on the curved substrate can be a polarizer holographic device in a curved form. Based on this, by preparing a polarizer holographic device in a curved form, the polarizer holographic device in a curved form realizes the bonding of the substrate layer, the orientation layer and the liquid crystal layer in the curved form with the device layer having the connecting surface, which is equivalent to realizing the bonding of the curved substrate and the curved optical device, thereby forming a corresponding optical system. Compared with an optical system composed of a plane polarizer holographic device and a curved optical device, such as an optical system composed of a plane substrate and a curved optical device, a polarizer holographic device in a curved form is conducive to achieving a smaller optical system volume. Furthermore, since the curved substrate included in the curved polarization hologram device can provide optical focal length or optical modulation capability to the polarization hologram device, it is beneficial to improve the optical modulation performance of the polarization hologram device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic flow chart of a method for preparing a polarization holographic device provided in an embodiment of the present application;

[0022] Figure 2 is a flow chart of the preparation of a polarization holographic device according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a polarization volume holographic device provided in an embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of another polarization holographic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0027] The embodiments of the present application provide a method for preparing a polarization volume hologram device 100 and the polarization volume hologram device 100 .

[0028] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] See also Figure 1 , Figure 1 1 is a schematic flow chart of a method for preparing a polarization volume holographic device 100 provided in an embodiment of the present application. The polarization volume holographic device 100 includes a polarization volume holographic grating, a polarization volume holographic lens, and the like.

[0030] like Figure 1 As shown, the method for preparing the polarization holographic device 100 includes steps S101 to S103.

[0031] S101 , disposing an alignment layer 120 on a first surface of the base layer 110 .

[0032] like Figure 2 As shown in (a), the base layer 110 can be obtained, and the alignment layer 120 can be set on the first surface of the base layer 110.

[0033] Accordingly, the base layer 110 can serve as a supporting structure of the polarization volume hologram device 100 to provide mechanical stability and flatness for the polarization volume hologram device 100 , thereby facilitating the convenience of manufacturing the polarization volume hologram device 100 .

[0034] Exemplarily, the base layer 110 is a flexible base layer.

[0035] For example, the flexible substrate is made of a flexible material and has the property of being able to bend without breaking.

[0036] In some embodiments, the first surface of the flexible substrate layer can serve as the first surface of the substrate layer 110. The alignment layer 120 is disposed on the first surface of the flexible substrate layer. For example, the alignment layer 120 is coated on the first surface of the flexible substrate layer.

[0037] Illustratively, the base layer 110 includes a flexible base layer and a rigid base layer.

[0038] For example, the rigid substrate layer is prepared based on a rigid material. The rigid substrate layer does not have bending properties. In the process of preparing the polarization holographic device 100, the rigid substrate layer 110 can be used as a supporting structure of the polarization holographic device 100 by utilizing the rigid substrate layer 110's non-bending property.

[0039] In some embodiments, the first surface of the flexible substrate layer can be used as the first surface of the substrate layer 110 for setting the alignment layer 120. The surface of the rigid substrate layer facing away from the flexible substrate layer can be used as the second surface of the substrate layer 110 for setting on the preparation platform of the polarization holographic device 100.

[0040] In some embodiments, the flexible substrate layer is connected to the rigid substrate layer by a substrate adhesive layer.

[0041] For example, the base adhesive layer is prepared based on a viscous material. One side surface of the base adhesive layer can be bonded to the surface of the flexible base layer close to the rigid base layer, and the other side surface of the base adhesive layer can be bonded to the surface of the rigid base layer close to the flexible base layer, so as to connect the flexible base layer and the rigid base layer to form the base layer 110 required for preparing the polarization holographic device 100.

[0042] Accordingly, when the base layer 110 includes a flexible base layer, the surface of the flexible base layer facing away from the rigid base layer, that is, the first surface of the flexible base layer, can be determined as the first surface of the base layer 110. For example, the polarization volume holographic device 100 can be prepared based on the first surface of the flexible base layer.

[0043] For example, when the alignment layer 120 is disposed on the first surface of the substrate layer 110 , the alignment of the alignment layer 120 can be used to subsequently determine the alignment of the liquid crystal layer 130 in the polarization volume hologram device 100 .

[0044] In some embodiments, the alignment layer 120 is coated on the first surface of the base layer 110 , and the alignment layer 120 is subjected to polarized light exposure to form an alignment of the alignment layer 120 .

[0045] For example, the alignment layer 120 may be coated on the first surface of the base layer 110 by spin coating. Of course, the method is not limited to spin coating and is not limited here.

[0046] When the first surface of the base layer 110 is coated with the alignment layer 120, the alignment of the alignment layer 120 may be determined. Figure 2 As shown in (b), the alignment layer 120 may be subjected to polarized exposure to form the alignment of the alignment layer 120. The alignment of the alignment layer 120 may be used to subsequently form the alignment of the liquid crystal layer 130 included in the polarized volume hologram device 100.

[0047] For example, the alignment layer 120 may be exposed to polarized light by a preset light source. The preset light source includes, for example, an ultraviolet light source, a laser light source, other specific light sources, etc., which are not limited here. When the alignment layer 120 is exposed to polarized light, the molecules involved in the alignment layer 120 may produce a corresponding arrangement, so that a corresponding orientation may be formed on the alignment layer 120. The orientation of the alignment layer 120 may be used to subsequently induce the orientation of the liquid crystal layer 130.

[0048] In some embodiments, any one of interference exposure and polarization mask exposure is performed on the alignment layer 120 to form the alignment of the alignment layer 120 .

[0049] For example, when interference exposure is performed on the alignment layer 120, two or more coherent light beams may interfere on the upper surface of the alignment layer 120 to control the formation of a polarization interference pattern, thereby inducing the molecules of the alignment layer 120 to produce a corresponding arrangement mode, thereby forming the orientation of the alignment layer 120. For example, when interference exposure is performed on the alignment layer 120 by a preset light source, a polarizer may be used to control the polarization state of light provided by the preset light source to the alignment layer 120. The polarizer may include a polarizer, a circular polarizer, etc., which are not limited here.

[0050] For example, when the alignment layer 120 is exposed through a polarization mask, the alignment layer 120 can be selectively exposed through a polarization mask and a preset light source with a specific polarization state. The polarization mask has a modulation effect on the polarization distribution of the preset light source with a specific polarization state. For example, when the polarization state of the preset light source is a linear polarization state, the polarization mask can modulate the preset light source from the linear polarization state to the desired polarization distribution, which is not limited here. Accordingly, the polarization exposure of the alignment layer 120 can be achieved through the polarization mask and the preset light source under the desired polarization distribution. The polarization mask can also have the characteristics of being transparent to certain areas and opaque to certain areas. Based on the modulation effect of the polarization mask on the polarization distribution of the preset light source and the regional light transmission characteristics of the polarization mask, a partial area of ​​the alignment layer 120 can be irradiated with the corresponding polarized light provided by the preset light source after the polarization mask acts, so as to induce the molecules involved in the alignment layer 120 in the partial area to produce a corresponding arrangement mode, thereby forming the orientation of the alignment layer 120. Accordingly, the partial area can be referred to as the exposure area of ​​the alignment layer 120. For example, a preset pattern may be designed on the polarization mask, and the exposure area of ​​the alignment layer 120 may be determined according to the preset pattern of the polarization mask, which is not limited here.

[0051] The orientation layer 120 can be oriented accordingly by performing polarization exposure on the orientation layer 120, such as performing interference exposure or polarization mask exposure on the orientation layer 120. The orientation of the orientation layer 120 can be used to subsequently induce the orientation of the liquid crystal layer 130, so as to subsequently prepare the polarization holographic device 100, such as a polarization holographic grating, a polarization holographic lens, and other devices.

[0052] S102 , disposing a liquid crystal layer 130 on a surface of the alignment layer 120 that is away from the substrate layer 110 to obtain an intermediate.

[0053] like Figure 2 As shown in (c), when a liquid crystal layer 130 is disposed on the surface of the alignment layer 120 facing away from the substrate layer 110 to obtain an intermediate, the alignment layer 120 of the intermediate can provide an orderly alignment with a specific arrangement direction to the liquid crystal layer 130 of the intermediate. Accordingly, the liquid crystal monomers included in the liquid crystal layer 130 of the intermediate can be arranged along a corresponding direction under the guidance of the alignment layer 120 of the intermediate.

[0054] In some embodiments, the liquid crystal layer 130 is coated on the surface of the alignment layer 120 facing away from the substrate layer 110 to align the liquid crystal layer 130 through the alignment layer 120 ; and the liquid crystal layer 130 is cured to obtain an intermediate.

[0055] For example, the liquid crystal layer 130 may include a liquid crystal solution formed by mixing a liquid crystal material with other additives, such as a photoinitiator. For example, the liquid crystal solution may be coated on the surface of the alignment layer 120 facing away from the base layer 110 by a coating technique, such as spin coating, spray coating, or drop coating, so that the liquid crystal layer 130 is coated on the surface of the alignment layer 120 facing away from the base layer 110, which is not limited here.

[0056] In the case where the liquid crystal layer 130 is coated, the liquid crystal layer 130 may be cured to obtain an intermediate.

[0057] In some embodiments, a preset exposure light source may be used to perform a curing process on the liquid crystal layer 130 .

[0058] For example, the wavelength of light provided by the preset exposure light source to the liquid crystal layer 130 matches the photosensitivity of the material included in the liquid crystal layer 130. Under the action of the preset exposure light source, the light provided by the preset exposure light source reacts with the photosensitive component of the material included in the liquid crystal layer 130, so that the liquid crystal layer 130 can be cured.

[0059] When the liquid crystal layer 130 is cured to obtain an intermediate, the liquid crystal layer 130 of the intermediate is in a highly elastic state or a non-rigid state with a certain elasticity. For example, when the liquid crystal layer 130 is cured by a preset exposure light source, the exposure parameters, exposure duration, etc. of the liquid crystal layer 130 by the preset exposure light source can be limited so that the liquid crystal layer 130 of the intermediate is in a highly elastic state or a non-rigid state with a certain elasticity, which is not limited here. Based on the highly elastic state characteristics or non-rigid state characteristics of the liquid crystal layer 130 of the intermediate, when the polarization holographic device 100 is subsequently prepared, the surface curvature of the liquid crystal layer 130 of the intermediate can be changed, which is conducive to improving the preparation flexibility of the polarization holographic device 100.

[0060] Exemplarily, the liquid crystal layer 130 includes liquid crystal monomers.

[0061] In some embodiments, the liquid crystal monomer is cured to form a liquid crystal polymer. Accordingly, the intermediate includes the liquid crystal polymer.

[0062] For example, when the liquid crystal layer 130 is cured, the liquid crystal monomers included in the liquid crystal layer 130 may undergo a polymerization reaction under the influence of temperature, pressure, light and other factors to form a polymer chain with liquid crystal optical properties, namely a liquid crystal polymer. Accordingly, when the liquid crystal polymer is formed, the orientation of the liquid crystal layer 130 may be fixed by the polymer network corresponding to the liquid crystal polymer. The liquid crystal polymer is in a highly elastic state or a non-rigid state with a certain elasticity. Based on the highly elastic or non-rigid properties of the liquid crystal polymer, when the polarization holographic device 100 is subsequently prepared, the surface curvature of the liquid crystal polymer included in the liquid crystal layer 130 may be changed to change the surface curvature of the liquid crystal layer 130, which is conducive to improving the preparation flexibility of the polarization holographic device 100.

[0063] S103, connecting the connecting curved surface of the device layer 140 with the liquid crystal layer 130 of the intermediate body to obtain the polarization hologram device 100; wherein the connecting curved surface is used to make the surface curvature of the substrate layer 110 in the polarization hologram device 100 different from the surface curvature of the substrate layer 110 in the intermediate body, the surface curvature of the orientation layer 120 in the polarization hologram device 100 different from the surface curvature of the substrate layer 110 in the intermediate body, and the surface curvature of the liquid crystal layer 130 in the polarization hologram device 100 different from the surface curvature of the liquid crystal layer 130 in the intermediate body.

[0064] Exemplarily, the device layer 140 may include a grating, a lens, etc., which are not limited here. When the connection curved surface of the device layer 140 is connected to the liquid crystal layer 130 of the intermediate body, the connection curved surface of the device layer 140 can be used to change the surface curvature of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130, so that the surface curvature of the substrate layer 110 in the polarization hologram device 100 is different from the surface curvature of the substrate layer 110 in the intermediate body, the surface curvature of the orientation layer 120 in the polarization hologram device 100 is different from the surface curvature of the substrate layer 110 in the intermediate body, and the surface curvature of the liquid crystal layer 130 in the polarization hologram device 100 is different from the surface curvature of the liquid crystal layer 130 in the intermediate body.

[0065] For example, Figure 2 (d) and Figure 2 As shown in (e), when the connection curved surface of the liquid crystal layer 130 is connected to the liquid crystal layer 130 of the intermediate, the surface curvature of the base layer 110 can be changed from the plane corresponding to the intermediate to the curved surface corresponding to the polarization hologram device 100, the surface curvature of the alignment layer 120 can be changed from the plane corresponding to the intermediate to the curved surface corresponding to the polarization hologram device 100, and the surface curvature of the liquid crystal layer 130 can be changed from the plane corresponding to the intermediate to the curved surface corresponding to the polarization hologram device 100. Accordingly, when the surface curvatures of the base layer 110, the alignment layer 120 and the liquid crystal layer 130 are changed according to the connection curved surface of the device layer 140, the base layer 110, the alignment layer 120 and the liquid crystal layer 130 in the curved surface form can be used as the curved surface base of the polarization hologram device 100. When the polarization hologram device 100 is prepared on the curved surface base, the polarization hologram device 100 can be a polarization hologram device 100 in the curved surface form. Based on this, the polarization hologram device 100 can be prepared not only on a flat substrate but also on a curved substrate, which is conducive to improving the flexibility of preparing the polarization hologram device 100. When the surface curvature of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130 of the polarization hologram device 100 is changed according to the connection curved surface of the device layer 140, the volume of the packaged polarization hologram device 100 will be reduced relative to the volume required for the packaged device layer 140 plus the intermediate prepared on the flat substrate, which is conducive to reducing the volume of the optical system including the polarization hologram device 100 such as the polarization holographic grating or lens.

[0066] In some embodiments, when the substrate layer 110 includes a flexible substrate layer and a rigid substrate layer, the rigid substrate layer is removed before connecting the connection curved surface of the device layer 140 with the liquid crystal layer 130 of the intermediate body.

[0067] For example, since the rigid substrate layer does not have bending properties, and the rigid substrate layer is located below the flexible substrate layer, the orientation layer 120, the liquid crystal layer 130, and the device layer 140, when the connection curved surface of the device layer 140 is connected to the liquid crystal layer 130 of the intermediate body, the presence of the rigid substrate layer will prevent the surface curvature of the flexible substrate layer, the intermediate orientation layer 120, and the liquid crystal layer 130 of the intermediate body included in the substrate layer 110 from changing according to the curvature of the connection curved surface of the device layer 140. Based on this, it is necessary to remove the rigid substrate layer included in the substrate layer 110 to improve the convenience of changing the surface curvature of the substrate layer 110, the orientation layer 120, and the liquid crystal layer 130 of the intermediate body. Accordingly, in the case where the flexible substrate layer included in the substrate layer 110 is connected to the rigid substrate layer through the substrate adhesive layer, since the flexible substrate layer no longer needs to be connected to the rigid substrate layer, the substrate adhesive layer and the rigid substrate layer can be removed.

[0068] For example, when the bonding force between the orientation layer 120 and the flexible base layer included in the base layer 110 is greater than the bonding force between the flexible base layer and the base adhesive layer, the base adhesive layer and the rigid base layer are peeled off. For another example, when the bonding force between the flexible base layer and the base adhesive layer is greater than the bonding force between the base adhesive layer and the rigid base layer, the rigid base layer is peeled off. Of course, this is not limited to this. For example, the separation of the flexible base layer and the rigid base layer can be achieved by dissolving the base adhesive layer. Among them, the dissolving solution selected when dissolving the base adhesive layer will not dissolve other layers except the base adhesive layer, and will not cause any impact on other layers. This is not limited here.

[0069] By peeling off the rigid substrate layer included in the substrate layer 110, the adverse effect of the rigid substrate layer on the surface curvature of the flexible substrate layer, the orientation layer 120 and the liquid crystal layer 130 included in the substrate layer 110 can be avoided, thereby facilitating the improvement of the manufacturing flexibility of the polarization holographic device 100.

[0070] Exemplarily, the liquid crystal layer 130 has viscosity.

[0071] In some embodiments, the material included in the liquid crystal layer 130 is viscous, and the liquid crystal layer 130 is also viscous. In some embodiments, the liquid crystal layer 130 includes liquid crystal monomers doped with a preset adhesive material, and under the action of the preset adhesive material, the liquid crystal layer 130 is viscous.

[0072] For example, in the case where the liquid crystal layer 130 includes liquid crystal monomers doped with a preset adhesive material, the liquid crystal polymer formed after the liquid crystal monomers are cured is also doped with the preset adhesive material accordingly, and the liquid crystal layer 130 still has adhesiveness.

[0073] In some embodiments, the surface of the liquid crystal layer 130 of the intermediate body is attached and bonded to the connection curved surface of the device layer 140 .

[0074] Since the liquid crystal layer 130 is sticky, when the connection curved surface of the device layer 140 is connected to the liquid crystal layer 130 of the intermediate, the connection curved surface of the device layer 140 and the liquid crystal layer 130 of the intermediate can be bonded according to the stickiness of the liquid crystal layer 130 to obtain the polarization holographic device 100. For example, the connection curved surface of the device layer 140 can be bonded to the surface of the liquid crystal layer 130 of the intermediate that deviates from the alignment layer 120. Accordingly, when the surface of the liquid crystal layer 130 of the intermediate is attached and bonded to the connection curved surface of the device layer 140, the curvature of the surface of the liquid crystal layer 130 can be changed according to the curvature of the connection curved surface to obtain the polarization holographic device 100.

[0075] In some embodiments, the connection curved surface of the device layer 140 and the intermediate liquid crystal layer 130 are connected by an adhesive layer.

[0076] For example, the adhesive layer has adhesiveness. By bonding one side of the adhesive layer to the surface of the liquid crystal layer 130 of the intermediate body that deviates from the orientation layer 120, and bonding the other side of the adhesive layer to the connection curved surface of the device layer 140, the connection curved surface of the device layer 140 and the liquid crystal layer 130 can be connected to obtain the polarization holographic device 100.

[0077] Based on this, different measures can be taken to connect the connection curved surface of the device layer 140 with the liquid crystal layer 130 of the intermediate body to obtain the polarization holographic device 100, which is conducive to improving the preparation convenience and flexibility of the polarization holographic device 100.

[0078] In some embodiments, the liquid crystal layer 130 of the polarization holographic device 100 is subjected to a secondary curing process.

[0079] For example, when the polarization volume hologram device 100 is prepared, the liquid crystal layer 130 included in the polarization volume hologram device 100 may be subjected to secondary curing treatment to increase the polymerization degree of the liquid crystal layer 130. For example, when the liquid crystal layer 130 included in the polarization volume hologram device 100 is subjected to secondary curing treatment, the liquid crystal layer 130 of the polarization volume hologram device 100 may be subjected to secondary exposure curing. Of course, it is also possible to choose not to perform secondary curing treatment on the liquid crystal layer 130 of the polarization volume hologram device 100, which is not limited here.

[0080] Based on the improvement of the polymerization degree of the liquid crystal layer 130 , the stability and durability of the liquid crystal layer 130 can be enhanced. Then, the surface curvature of the liquid crystal layer 130 after secondary curing treatment will not continue to change under normal conditions, thereby improving the stability of the polarization holographic device 100 .

[0081] In some embodiments, at least one of the base layer 110 and the alignment layer 120 of the polarization holographic device 100 is peeled off.

[0082] When the polarization hologram device 100 is prepared, at least one of the base layer 110 and the alignment layer 120 included in the polarization hologram device 100 may be peeled off to reduce the volume and weight of the polarization hologram device 100 .

[0083] For example, when the adhesive force between the liquid crystal layer 130 and the device layer 140 is greater than the adhesive force between the base layer 110 and the alignment layer 120 , the base layer 110 is peeled off.

[0084] For example, when the adhesion force between the liquid crystal layer 130 and the device layer 140 is greater than the adhesion force between the substrate layer 110 and the orientation layer 120, the substrate layer 110 can be peeled off by using a force that is less than the adhesion force between the liquid crystal layer 130 and the device layer 140 and greater than the adhesion force between the substrate layer 110 and the orientation layer 120.

[0085] For example, when the adhesive force between the liquid crystal layer 130 and the device layer 140 is greater than the adhesive force between the alignment layer 120 and the liquid crystal layer 130 , the alignment layer 120 is peeled off.

[0086] For example, when the adhesion force between the liquid crystal layer 130 and the device layer 140 is greater than the adhesion force between the orientation layer 120 and the liquid crystal layer 130, the orientation layer 120 can be peeled off by using a force that is less than the adhesion force between the liquid crystal layer 130 and the device layer 140 and greater than the adhesion force between the orientation layer 120 and the liquid crystal layer 130.

[0087] Of course, it is not limited thereto. When the alignment layer 120 of the polarization hologram device 100 is peeled off, the alignment layer 120 may be dissolved by dissolving to peel off the alignment layer 120. In the process of dissolving the alignment layer 120, other layers in the polarization hologram device 100 except the alignment layer 120 will not be dissolved, or any influence will be caused on other layers except the alignment layer 120. This is not limited here.

[0088] Of course, the substrate layer 110 and the alignment layer 120 of the polarization holographic device 100 may also be retained, which is not limited here.

[0089] In this way, when at least one of the base layer 110 and the alignment layer 120 of the polarization volumetric hologram device 100 is peeled off, the volume and weight of the polarization volumetric hologram device 100 can be reduced.

[0090] The method for preparing the polarization holographic device 100 provided in the above embodiment comprises: arranging an orientation layer 120 on a first surface of a substrate layer 110; arranging a liquid crystal layer 130 on a surface of the orientation layer 120 away from the substrate layer 110 to obtain an intermediate; connecting a connecting curved surface of the device layer 140 with the liquid crystal layer 130 of the intermediate to obtain the polarization holographic device 100; wherein the connecting curved surface is used to make the surface curvature of the substrate layer 110 in the polarization holographic device 100 different from the surface curvature of the substrate layer 110 in the intermediate, the surface curvature of the orientation layer 120 in the polarization holographic device 100 different from the surface curvature of the orientation layer 120 in the intermediate, and the surface curvature of the liquid crystal layer 130 in the polarization holographic device 100 different from the surface curvature of the liquid crystal layer 130 in the intermediate.

[0091] Under the effect of the connecting curved surface, the surface curvature of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130 in the intermediate body are all changed, that is, they are changed according to the curvature of the connecting curved surface, which is equivalent to that the polarizer hologram device 100 can be prepared on the curved substrate. Correspondingly, the polarizer hologram device 100 prepared on the curved substrate can be a polarizer hologram device 100 in a curved form. Based on this, by preparing the polarizer hologram device 100 in a curved form, the polarizer hologram device 100 in a curved form realizes the bonding of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130 in a curved form with the device layer 140 having the connecting curved surface, which is equivalent to realizing the bonding of the curved substrate and the curved optical device, thereby forming a corresponding optical system. Compared with an optical system composed of a plane polarizer hologram device and a curved optical device, such as an optical system composed of a plane substrate and a curved optical device, the polarizer hologram device 100 in a curved form is conducive to realizing a smaller optical system volume. Furthermore, since the curved substrate included in the curved polarization volume hologram device 100 can provide optical focal length or optical modulation capability to the polarization volume hologram device 100 , it is beneficial to improve the optical modulation performance of the polarization volume hologram device 100 .

[0092] See also Figure 3 , Figure 3 It is a schematic diagram of a polarization volume holographic device 100 provided in an embodiment of the present application.

[0093] like Figure 3 As shown, the polarization holographic device 100 includes a substrate layer 110 , an alignment layer 120 , a liquid crystal layer 130 and a device layer 140 .

[0094] The alignment layer 120 is disposed on the first surface of the base layer 110 .

[0095] The liquid crystal layer 130 is disposed on a surface of the alignment layer 120 that is away from the substrate layer 110 .

[0096] The connecting curved surface of the device layer 140 is connected to the liquid crystal layer 130; the connecting curved surface is used to make the surface curvature of the substrate layer 110 in the polarization hologram device 100 different from the surface curvature of the substrate layer 110 before the liquid crystal layer 130 is connected to the connecting curved surface, the surface curvature of the orientation layer 120 in the polarization hologram device 100 is different from the surface curvature of the orientation layer 120 before the liquid crystal layer 130 is connected to the connecting curved surface, and the surface curvature of the liquid crystal layer 130 in the polarization hologram device 100 is different from the surface curvature of the liquid crystal layer 130 before the liquid crystal layer 130 is connected to the connecting curved surface.

[0097] Exemplarily, the surface curvature of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130 can all be changed. Then, when the connection curve of the device layer 140 is connected to the liquid crystal layer 130, the surface curvature of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130 can be changed according to the curvature of the connection curve to obtain the polarization holographic device 100. The polarization holographic device 100 is equivalent to a polarization holographic device 100 in a curved form. The curved polarization holographic device 100 realizes the bonding of the curved substrate and the curved optical device, thereby forming a corresponding optical system. Compared with an optical system composed of a plane polarization holographic device and a curved optical device, such as an optical system composed of a plane substrate and a curved optical device, the curved polarization holographic device 100 is conducive to achieving a smaller optical system volume. Accordingly, the curved substrate of the polarization volume hologram device 100 can provide optical focal length or optical modulation capability to the polarization volume hologram device 100 , which is beneficial to improving the optical modulation performance of the polarization volume hologram device 100 .

[0098] For example, the device layer 140 may include a grating, a lens, etc., which is not limited here.

[0099] In some embodiments, the substrate layer 110 is a flexible substrate layer.

[0100] For example, if the flexible substrate layer is prepared based on a flexible material, the flexible substrate layer has the property of bending without breaking. The first surface of the flexible substrate layer can be used as the first surface of the substrate layer 110 for setting the orientation layer 120. Based on this, when the connection curved surface of the device layer 140 is connected to the liquid crystal layer 130, the flexible substrate layer can change its surface curvature according to the curvature of the connection curved surface. Accordingly, when the surface curvature of the flexible substrate layer changes, the flexible substrate layer will not break, which is conducive to improving the stability of the polarization holographic device 100.

[0101] In some embodiments, the substrate layer 110 includes a flexible substrate layer and a rigid substrate layer; the first surface of the flexible substrate layer is used to set the alignment layer 120; the rigid substrate layer is used to be removed before the connection curved surface of the device layer 140 is connected to the liquid crystal layer 130.

[0102] For example, if the rigid substrate layer is prepared based on a rigid material, the rigid substrate layer does not have bending properties. The surface of the flexible substrate layer deviating from the rigid substrate layer can be used as the first surface of the flexible substrate layer for setting the orientation layer 120. Based on this, before the connection curved surface of the device layer 140 is connected to the liquid crystal layer 130, the rigid substrate layer can be removed so that the flexible substrate layer, the orientation layer 120 and the liquid crystal layer 130 included in the substrate layer 110 can change their respective surface curvatures when the connection curved surface of the device layer 140 is connected to the liquid crystal layer 130. Then, the polarization holographic device 100 can be a polarization holographic device 100 with a curved surface.

[0103] In some embodiments, a flexible substrate layer is adapted to be connected to a rigid substrate layer via a substrate adhesive layer.

[0104] For example, the base adhesive layer is prepared based on a viscous material. One side of the base adhesive layer can be bonded to the surface of the flexible base layer close to the rigid base layer, and the other side of the base adhesive layer can be bonded to the surface of the rigid base layer close to the flexible base layer to connect the flexible base layer and the rigid base layer. Accordingly, when the rigid base layer is removed, the base adhesive layer can also be removed. For example, when the bonding force between the orientation layer 120 and the flexible base layer included in the base layer 110 is greater than the bonding force between the flexible base layer and the base adhesive layer, the base adhesive layer and the rigid base layer are peeled off. For another example, the separation of the flexible base layer and the rigid base layer can be achieved by dissolving the base adhesive layer. Among them, the dissolving solution selected when dissolving the base adhesive layer will not dissolve other layers except the base adhesive layer, and will not cause any impact on other layers. This is not limited here.

[0105] In some embodiments, the alignment layer 120 is coated on the first surface of the base layer 110 , and the alignment layer 120 is used to form an alignment of the alignment layer 120 after polarized exposure.

[0106] For example, when the alignment layer 120 is coated on the first surface of the base layer 110, the alignment of the alignment layer 120 can be formed by polarized exposure. For example, the alignment layer 120 can be oriented by any one of interference exposure and polarized mask exposure.

[0107] In some embodiments, the liquid crystal layer 130 is coated on a surface of the alignment layer 120 that is away from the substrate layer 110 , and the liquid crystal layer 130 is used for curing after being aligned by the alignment layer 120 .

[0108] For example, the liquid crystal layer 130 may be coated on the surface of the alignment layer 120 that is away from the substrate layer 110 by using a coating technology. Accordingly, the alignment of the alignment layer 120 may determine the alignment of the liquid crystal layer 130.

[0109] After the liquid crystal layer 130 is oriented by the orientation layer 120, the liquid crystal layer 130 can be cured. The liquid crystal layer 130 after the curing treatment is in a non-rigid state with high elasticity or a certain elasticity. Based on this, when the connecting curved surface of the device layer 140 is connected to the liquid crystal layer 130, the surface curvature of the liquid crystal layer 130 can be changed according to the curvature of the connecting curved surface. Correspondingly, when the connecting curved surface of the device layer 140 is connected to the liquid crystal layer 130, the surface curvature of the substrate layer 110 and the orientation layer 120 can also be changed according to the curvature of the connecting curved surface, then the polarization holographic device 100 is equivalent to being prepared on a curved substrate.

[0110] Exemplarily, the liquid crystal layer 130 is adhesive; the surface of the liquid crystal layer 130 is used to adhere to and bond to the connecting curved surface of the device layer 140 .

[0111] In some embodiments, the material included in the liquid crystal layer 130 is viscous, and the liquid crystal layer 130 is also viscous. In some embodiments, the liquid crystal layer 130 includes liquid crystal monomers doped with a preset adhesive material, and under the action of the preset adhesive material, the liquid crystal layer 130 is viscous.

[0112] For example, in the case where the liquid crystal layer 130 includes liquid crystal monomers doped with a preset adhesive material, the liquid crystal polymer formed after the liquid crystal monomers are cured is also doped with the preset adhesive material accordingly, and the liquid crystal layer 130 still has adhesiveness.

[0113] When the surface of the liquid crystal layer 130 is attached and bonded to the connection curved surface of the device layer 140, since the liquid crystal layer 130 has a highly elastic state or a non-rigid state with a certain elasticity, the curvature of the surface of the liquid crystal layer 130 can be changed according to the curvature of the connection curved surface. In addition, the liquid crystal layer 130 will not break when the curvature of the surface is changed, which is beneficial to improving the stability of the polarization holographic device 100.

[0114] In some embodiments, the polarization holographic device 100 is used to connect the connection region of the device layer 140 and the liquid crystal layer 130 through an adhesive layer.

[0115] For example, the adhesive layer has adhesiveness. By bonding one side of the adhesive layer to the surface of the liquid crystal layer 130 of the intermediate body that deviates from the orientation layer 120, and bonding the other side of the adhesive layer to the connection curved surface of the device layer 140, the connection curved surface of the device layer 140 and the liquid crystal layer 130 can be connected to obtain the polarization holographic device 100.

[0116] In some embodiments, the polarization volume holographic device 100 is used to perform a secondary curing process on the liquid crystal layer 130 .

[0117] For example, the secondary curing process may include secondary exposure curing. Since the liquid crystal layer 130 after curing is in a highly elastic state or a non-rigid state with a certain elasticity, the secondary curing process may be performed to improve the polymerization degree of the liquid crystal layer 130, so that the surface curvature of the liquid crystal layer 130 after the secondary curing process will not continue to change under normal conditions, thereby improving the stability of the polarization holographic device 100. Of course, it is not limited to this, and it is also possible to choose not to perform the secondary curing process on the liquid crystal layer 130 of the polarization holographic device 100, which is not limited here.

[0118] In the case where the surface curvature of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130 of the polarization volume hologram device 100 is changed according to the curvature of the connecting curved surface of the device layer 140, the polarization volume hologram device 100 may be a polarization volume hologram device 100 in a curved surface form. Then, the polarization volume hologram device 100 may perform corresponding optical modulation in combination with the optical focal length or optical modulation capability provided by the curved surface form, which is beneficial to improving the optical modulation performance of the polarization volume hologram device 100. Accordingly, for the polarization volume hologram device 100 in a curved surface form, since the surface curvature of the substrate layer 110, the orientation layer 120 and the liquid crystal layer 130 of the polarization volume hologram device 100 is changed according to the curvature of the connecting curved surface of the device layer 140, the curved surface form of the polarization volume hologram device 100 realizes the bonding of the curved surface substrate and the curved surface optical device, thereby forming a corresponding optical system. Compared with an optical system composed of a plane polarization volume hologram device and a curved optical device, an optical system composed of a curved polarization volume hologram device 100 and a curved optical device is advantageous in achieving a smaller volume.

[0119] The polarization volume hologram device 100 of the embodiment of the present application can refer to the description of the preparation method of the polarization volume hologram device 100 provided in the above embodiments, which will not be repeated here.

[0120] See also Figure 4 , Figure 4 It is a schematic diagram of another polarization holographic device 100 provided in an embodiment of the present application.

[0121] like Figure 4As shown, the polarization holographic device 100 at least includes a liquid crystal layer 130 and a device layer 140 .

[0122] The connecting curved surface of the device layer 140 is connected to the liquid crystal layer 130; the surface curvature of the liquid crystal layer 130 in the polarization holographic device 100 is different from the surface curvature of the liquid crystal layer 130 before the liquid crystal layer 130 is connected to the connecting curved surface; the polarization holographic device 100 is obtained by peeling off at least one of the base layer 110 and the orientation layer 120 included in the polarization holographic device 100 provided in the embodiment of the application.

[0123] Since the curvature of the surface of the liquid crystal layer 130 or the alignment layer 120 included in the polarization volume hologram device 100 is changed according to the curvature of the connecting curved surface of the device layer 140, the polarization volume hologram device 100 is a polarization volume hologram device 100 with a curved surface.

[0124] For example, the base layer 110 is used to be peeled off when the adhesive force between the liquid crystal layer 130 and the device layer 140 is greater than the adhesive force between the base layer 110 and the alignment layer 120 .

[0125] For example, the alignment layer 120 is used to be peeled off when the adhesive force between the liquid crystal layer 130 and the device layer 140 is greater than the adhesive force between the alignment layer 120 and the liquid crystal layer 130. Of course, it is not limited to this. When peeling off the alignment layer 120 of the polarization hologram device 100, the alignment layer 120 can also be dissolved by dissolving to achieve the peeling of the alignment layer 120. In the process of dissolving the alignment layer 120, other layers in the polarization hologram device 100 except the alignment layer 120 will not be dissolved, or other layers except the alignment layer 120 will not be affected. This is not limited here.

[0126] In the case where at least one of the base layer 110 and the alignment layer 120 is peeled off, the volume and weight of the polarization volume hologram device 100 can be reduced to obtain a miniaturized polarization volume hologram device 100 .

[0127] The polarization volume hologram device 100 of the embodiment of the present application can refer to the preparation method of the polarization volume hologram device 100 and / or the description of the polarization volume hologram device 100 provided in the above-mentioned embodiments, which will not be described in detail here.

[0128] It should be understood that the terms used in this specification of the application are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in the specification of the application and the attached claims, unless the context clearly indicates otherwise, the singular forms of "one", "an" and "the" are intended to include plural forms. It should also be understood that the term "and / or" used in the specification of the application and the attached claims refers to any combination of one or more of the items listed in association and all possible combinations, and includes these combinations. It should be noted that in this article, the term "include", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or system including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or system. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the existence of other identical elements in the process, method, article or system including the element.

[0129] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for preparing a polarization holographic device, characterized in that: include: Disposing an alignment layer on the first surface of the base layer; Disposing a liquid crystal layer on the surface of the alignment layer away from the substrate layer to obtain an intermediate; The connecting curved surface of the device layer is connected to the liquid crystal layer of the intermediate to obtain a polarizer holographic device; wherein the connecting curved surface is used to make the surface curvature of the substrate layer in the polarizer holographic device different from the surface curvature of the substrate layer in the intermediate, the surface curvature of the orientation layer in the polarizer holographic device different from the surface curvature of the orientation layer in the intermediate, and the surface curvature of the liquid crystal layer in the polarizer holographic device different from the surface curvature of the liquid crystal layer in the intermediate.

2. The preparation method according to claim 1, characterized in that: The method of providing an alignment layer on the first surface of the base layer comprises: Coating an alignment layer on a first surface of the base layer; The alignment layer is subjected to polarized light exposure to form an alignment of the alignment layer.

3. The preparation method according to claim 1, characterized in that: The base layer is a flexible base layer.

4. The preparation method according to claim 1, characterized in that: The base layer includes a flexible base layer and a rigid base layer; The step of coating the alignment layer on the first surface of the base layer comprises: arranging the alignment layer on the first surface of the flexible base layer; Before connecting the connection curved surface of the device layer with the liquid crystal layer of the intermediate body, the method further includes: removing the rigid base layer.

5. The preparation method according to claim 4, characterized in that: The flexible substrate layer is connected to the rigid substrate layer via a substrate adhesive layer.

6. The preparation method according to claim 1, characterized in that: The step of providing a liquid crystal layer on a surface of the alignment layer away from the substrate layer to obtain an intermediate comprises: Coating a liquid crystal layer on a surface of the alignment layer facing away from the substrate layer, so as to align the liquid crystal layer through the alignment layer; The liquid crystal layer is cured to obtain the intermediate.

7. The preparation method according to claim 1, characterized in that: The liquid crystal layer is sticky; the step of connecting the connection curved surface of the device layer with the liquid crystal layer of the intermediate body comprises: The surface of the liquid crystal layer of the intermediate is laminated and bonded to the connection curved surface of the device layer.

8. The preparation method according to claim 1, characterized in that: The step of connecting the connection curved surface of the device layer to the liquid crystal layer of the intermediate body comprises: The connection curved surface of the device layer and the liquid crystal layer of the intermediate body are connected through an adhesive layer.

9. The preparation method according to claim 1, characterized in that: After the connecting curved surface of the device layer is connected to the liquid crystal layer of the intermediate body to obtain the polarization holographic device, the preparation method further comprises: A secondary curing process is performed on the liquid crystal layer of the polarization holographic device.

10. The preparation method according to claim 1, characterized in that: After the connecting curved surface of the device layer is connected to the liquid crystal layer of the intermediate body to obtain the polarization holographic device, the preparation method further comprises: At least one of the base layer and the alignment layer of the polarizer hologram device is peeled off.

11. A polarization holographic device, characterized in that: include: Basal layer; An alignment layer, the alignment layer being disposed on the first surface of the base layer; a liquid crystal layer, wherein the liquid crystal layer is disposed on a surface of the alignment layer facing away from the substrate layer; as well as The device layer has a connecting curved surface connected to the liquid crystal layer; the connecting curved surface is used to make the surface curvature of the substrate layer in the polarization hologram device different from the surface curvature of the substrate layer before the liquid crystal layer is connected to the connecting curved surface, the surface curvature of the orientation layer in the polarization hologram device is different from the surface curvature of the orientation layer before the liquid crystal layer is connected to the connecting curved surface, and the surface curvature of the liquid crystal layer in the polarization hologram device is different from the surface curvature of the liquid crystal layer before the liquid crystal layer is connected to the connecting curved surface.

12. The polarization holographic device according to claim 11, characterized in that: The alignment layer is coated on the first surface of the base layer, and is used to form the alignment of the alignment layer after polarized exposure.

13. The polarization holographic device according to claim 11, characterized in that: The base layer is a flexible base layer.

14. The polarization holographic device according to claim 11, characterized in that: The base layer includes a flexible base layer and a rigid base layer; The first surface of the flexible substrate layer is used to set an alignment layer; The rigid base layer is used to be removed before the connection curved surface of the device layer is connected to the liquid crystal layer.

15. The polarization holographic device according to claim 14, characterized in that: The flexible substrate layer is used to be connected to the rigid substrate layer through a substrate adhesive layer.

16. The polarization holographic device according to claim 11, characterized in that: The liquid crystal layer is coated on a surface of the alignment layer on a side away from the substrate layer, and the liquid crystal layer is used for being oriented by the alignment layer and then being cured.

17. The polarization holographic device according to claim 11, characterized in that: The liquid crystal layer is sticky; the surface of the liquid crystal layer is used to adhere to and bond to the connecting curved surface of the device layer.

18. The polarization holographic device according to claim 11, characterized in that: The polarization holographic device is used to connect the connection curved surface of the device layer and the liquid crystal layer through an adhesive layer.

19. The polarization holographic device according to claim 11, characterized in that: The polarization holographic device is used for performing a secondary curing process on the liquid crystal layer.

20. A polarization holographic device, characterized in that: The polarization holographic device at least comprises: a liquid crystal layer; and A device layer, wherein a connection curved surface of the device layer is connected to the liquid crystal layer; a surface curvature of the liquid crystal layer in the polarization holographic device is different from a surface curvature of the liquid crystal layer before the liquid crystal layer is connected to the connection curved surface; The polarization hologram device is obtained by peeling off at least one of the base layer and the alignment layer of the polarization hologram device according to claim 11.

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