Optical component, optical encryption device and encryption method

Abstract

The invention provides an optical component, an optical encryption device and an encryption method, and relates to the technical field of optical materials. The optical component is formed by stacking a liquid crystal box based on a positive nematic phase liquid crystal layer and a phase delay sheet, and a twisted stacking structure is constructed by accurately controlling the stretching direction of the phase delay sheet and the stacking angle of the orientation direction of an orientation film, so that the optical component has high glum and high FOM value, multi-responsiveness and arbitrary patterning ability. Besides, the optical encryption device provided by the invention is prepared on the basis of an optical component, and the optical encryption device comprises a polymerizable liquid crystal monomer and / or a second fluorescent dye doped in a positive nematic liquid crystal layer, so that circularly polarized light generated by the optical component can be adjusted through various external stimuli; therefore, the design of various encryption methods can be carried out on the optical encryption device, and the application requirements in the fields of multi-dimensional data coding, advanced anti-counterfeiting, information encryption and the like are met.

Description

Technical Field

[0001] The present application relates to the technical field of optical materials, and more specifically, to an optical component, an optical encryption device and an encryption method. Background Art

[0002] With the rapid development of information technology, the demand for security and efficiency of information storage and encryption is growing. Circularly polarized luminescence (CPL) materials have shown great potential in the field of multidimensional data encoding due to their unique chiral optical properties and inherent chiral optical information dimensions. Although traditional chiral liquid crystal systems can achieve high CPL asymmetry factors (g lum ), but it is often accompanied by a loss of nearly 50% luminous efficiency, resulting in a low quality factor (FOM), which limits its practical application. In addition, it is difficult for existing CPL materials to have high g lum and high FOM values, multi-responsiveness, and arbitrary patterning capabilities cannot meet the diverse demands of modern information processing and security protection for high-performance materials. Therefore, the development of new CPL materials is of key significance. Summary of the invention

[0003] In view of this, the present application provides an optical component, an optical encryption device and an encryption method, which effectively solve the technical problems existing in the prior art and provide a high g lum Optical components with high FOM values, multi-responsiveness and arbitrary patterning capabilities can also design different encryption methods based on the optical encryption devices of the optical components to meet application requirements in fields such as multi-dimensional data encoding, advanced anti-counterfeiting and information encryption.

[0004] To achieve the above objectives, the technical solutions provided by this application are as follows:

[0005] An optical component, comprising:

[0006] A liquid crystal box, the liquid crystal box comprising: a sealed box body; a first electrode and a second electrode, the first electrode and the second electrode are located in the sealed box body and are arranged opposite to each other; a first orientation film and a second orientation film, the first orientation film is located on the side of the first electrode facing the second electrode, the second orientation film is located on the side of the second electrode facing the first electrode, and the orientation directions of the first orientation film and the second orientation film are the same; a positive liquid crystal layer, the positive nematic liquid crystal layer is located between the first orientation film and the second orientation film, and the positive nematic liquid crystal layer is doped with a first fluorescent dye and a photoinitiator;

[0007] A phase retarder covers the surface of the liquid crystal box on the first electrode side, and a stretching direction of the phase retarder and an orientation direction of the first orientation film form an angle of -90° to +90°.

[0008] Optionally, the material of the positive nematic liquid crystal layer includes at least one of E7, 5CB, 6CB, and 8CB;

[0009] And / or, the first fluorescent dye includes at least one of coumarin 6, rubrene, 9,10-dimethylanthracene, and Nile red;

[0010] And / or, the photoinitiator includes at least one of I-651 and I-1173;

[0011] And / or, the material of the phase retarder includes at least one of PVA, PE, PET, and D4.

[0012] Optionally, the doping concentration of the first fluorescent dye is 0.01 to 50.25 wt %.

[0013] Based on the same inventive concept, the present application also provides an optical encryption device, comprising:

[0014] At least one of the above optical components further comprises a polymerizable liquid crystal monomer and / or a second fluorescent dye doped in the positive nematic liquid crystal layer, wherein the first fluorescent dye and the second fluorescent dye satisfy a fluorescence resonance energy transfer condition.

[0015] Optionally, the polymerizable liquid crystal monomer includes at least one of RM257, RM82, and LC756;

[0016] And / or, the second fluorescent dye comprises spiropyran.

[0017] Based on the same inventive concept, the present application also provides an encryption method, which is applied to the above-mentioned optical encryption device, wherein the optical component further includes a polymerizable liquid crystal monomer doped in the positive nematic liquid crystal layer, wherein the encryption method includes:

[0018] Stimulating the optical component based on the encryption mask so that the polymerizable liquid crystal monomer of the optical component at the encryption pattern is polymerized to form a solid liquid crystal polymer, wherein the encryption pattern is a hollow pattern of the encryption mask;

[0019] Alternatively, the encryption method comprises:

[0020] applying a preset voltage to the first electrode and the second electrode;

[0021] The optical component is stimulated based on the encryption mask, so that the polymerizable liquid crystal monomer of the optical component at the encryption pattern is polymerized to form a solid liquid crystal polymer, wherein the encryption pattern is a hollow pattern of the encryption mask.

[0022] Based on the same inventive concept, the present application also provides an encryption method, which is applied to the above-mentioned optical encryption device, wherein the optical component further includes a second fluorescent dye doped in the positive nematic phase liquid crystal layer, wherein the encryption method includes:

[0023] The optical component is stimulated based on the first encryption mask, so that the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at a first encryption pattern, wherein the first encryption pattern is a hollow pattern of the first encryption mask.

[0024] Optionally, the encryption method further includes:

[0025] Controlling the second fluorescent dye of the optical component at the first encrypted pattern to fail;

[0026] The optical component is stimulated based on the second encryption mask, so that the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the second encryption pattern, wherein the second encryption pattern is a hollow pattern of the second encryption mask.

[0027] Based on the same inventive concept, the present application also provides an encryption method, which is applied to the above-mentioned optical encryption device, wherein the optical component further includes a polymerizable liquid crystal monomer and a second fluorescent dye doped in the positive nematic liquid crystal layer, wherein the encryption method includes:

[0028] Stimulating the optical component based on the third encryption mask so that the polymerizable liquid crystal monomer of the optical component at the third encryption pattern is polymerized to form a solid liquid crystal polymer, and at the same time, the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the third encryption pattern, wherein the third encryption pattern includes a polymerization area and a first encryption part, and the third encryption pattern is a hollow pattern of the third encryption mask;

[0029] applying a preset voltage to the first electrode and the second electrode;

[0030] The optical component is stimulated based on the fourth encryption mask so that the polymerizable liquid crystal monomer of the optical component at the second encryption part of the polymerization area is polymerized to form a solid liquid crystal polymer, and the second fluorescent dye of the optical component at the second encryption part is controlled to be ineffective.

[0031] Optionally, after stimulating the optical component based on the fourth encryption mask, the encryption method further includes: controlling the second fluorescent dye of the optical component to be ineffective;

[0032] Optionally, after the second fluorescent dye controlling the optical component fails, the encryption method further comprises:

[0033] The optical component is stimulated based on the fifth encryption mask so that the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the polymerization area outside the second encryption part and the first encryption part, wherein the fifth encryption mask is a hollow pattern corresponding to the polymerization area outside the second encryption part and the first encryption part.

[0034] Compared with the prior art, the technical solution provided by this application has at least the following advantages:

[0035] The present application provides an optical component, an optical encryption device and an encryption method, wherein the optical component comprises: a liquid crystal box, wherein the liquid crystal box comprises: a sealed box body; a first electrode and a second electrode, wherein the first electrode and the second electrode are located in the sealed box body and are arranged opposite to each other; a first orientation film and a second orientation film, wherein the first orientation film is located on the side of the first electrode facing the second electrode, and the second orientation film is located on the side of the second electrode facing the first electrode, and the orientation directions of the first orientation film and the second orientation film are the same; a positive liquid crystal layer, wherein the positive nematic liquid crystal layer is located between the first orientation film and the second orientation film, and the positive nematic liquid crystal layer is doped with a first fluorescent dye and a photoinitiator; a phase delay plate, wherein the phase delay plate covers the surface of the liquid crystal box on the side of the first electrode, and the stretching direction of the phase delay plate and the orientation direction of the first orientation film are at an angle of -90° to +90°.

[0036] From the above content, it can be seen that the technical solution provided by the present application is that the optical component is formed by stacking a liquid crystal cell based on a positive nematic phase liquid crystal layer and a phase retarder, and by precisely controlling the stacking angle of the stretching direction of the phase retarder and the orientation direction of the orientation film, a twisted stacking structure is constructed to construct a high g lum The liquid crystal box is composed of a positive nematic phase liquid crystal layer and a doped first fluorescent dye and a photoinitiator. Not only can the liquid crystal box be designed with any shape pattern, but the liquid crystal box can also provide excellent linear polarized light emission, and the liquid crystal is adjusted by the electric field of the first electrode and the second electrode to achieve the purpose of multi-responsivity, so that the optical component provided by the present application has a high g lumand high FOM value, multi-responsiveness and arbitrary patterning capability. In addition, the optical encryption device provided by the present application is prepared based on optical components. Since the optical encryption device includes a polymerizable liquid crystal monomer and / or a second fluorescent dye doped in a positive nematic phase liquid crystal layer, the circularly polarized light emitted by the optical components can be adjusted by a variety of external stimuli, so that a variety of encryption methods can be designed for the optical encryption device to meet the application requirements in the fields of multi-dimensional data encoding, advanced anti-counterfeiting and information encryption. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0038] Figure 1 A schematic diagram of the structure of an optical component provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the angle between the orientation direction and the stretching direction provided in an embodiment of the present application;

[0040] Figure 3 A schematic diagram of the structure of an optical encryption device provided in an embodiment of the present application;

[0041] Figure 4 A schematic diagram of an encryption principle provided in an embodiment of the present application;

[0042] Figure 5 Another schematic diagram of encryption principle provided in an embodiment of the present application;

[0043] Figure 6 A schematic diagram of another encryption principle provided in an embodiment of the present application;

[0044] Figure 7 A schematic diagram of another encryption principle provided for an embodiment of the present application. DETAILED DESCRIPTION

[0045] 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 only 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.

[0046] As described in the background technology, with the rapid development of information technology, the demand for security and efficiency of information storage and encryption is growing. Circularly polarized luminescent materials have great potential in the field of multidimensional data encoding due to their unique chiral optical properties and inherent chiral optical information dimensions. Although traditional chiral liquid crystal systems can achieve high CPL asymmetry factors, they are often accompanied by a loss of nearly 50% in luminous efficiency, resulting in a low quality factor, which limits their practical applications. In addition, it is difficult for existing CPL materials to have both high g lum and high FOM values, multi-responsiveness, and arbitrary patterning capabilities cannot meet the diverse demands of modern information processing and security protection for high-performance materials. Therefore, the development of new CPL materials is of key significance.

[0047] Based on this, the embodiments of the present application provide an optical component, an optical encryption device and an encryption method, which effectively solve the technical problems existing in the prior art and not only provide a high g lum Optical components with high FOM values, multi-responsiveness and arbitrary patterning capabilities can also design different encryption methods based on the optical encryption devices of the optical components to meet application requirements in fields such as multi-dimensional data encoding, advanced anti-counterfeiting and information encryption.

[0048] To achieve the above purpose, the technical solution provided in the embodiment of the present application is as follows, specifically combined with Figures 1 to 7 The technical solution provided in the embodiments of the present application is described in detail.

[0049] Combination Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of an optical component provided in an embodiment of the present application is shown. Figure 2A schematic diagram of an angle between an orientation direction and a stretching direction provided in an embodiment of the present application. The optical component provided in an embodiment of the present application includes: a liquid crystal box 100, the liquid crystal box 100 includes: a sealed box body 110; a first electrode 121 and a second electrode 122, the first electrode 121 and the second electrode 122 are located in the sealed box body 110 and are arranged opposite to each other; a first orientation film 131 and a second orientation film 132, the first orientation film 131 is located on the side of the first electrode 121 facing the second electrode 122, the second orientation film 132 is located on the side of the second electrode 122 facing the first electrode 121, and the orientation directions A1 of the first orientation film 131 and the second orientation film 132 are the same; a positive liquid crystal layer 140, the positive nematic phase liquid crystal layer 140 is located between the first orientation film 131 and the second orientation film 132, and the positive nematic phase liquid crystal layer 140 is doped with a first fluorescent dye and a photoinitiator. The phase retarder 200 covers the surface of the liquid crystal box 100 on the first electrode 121 side, and the stretching direction A2 of the phase retarder 200 and the orientation direction A1 of the first orientation film 131 form an angle of -90° to +90°.

[0050] It should be noted that the stretching direction A2 and the alignment direction A1 provided in the embodiment of the present application are both parallel to the plane where the liquid crystal cell 100 is located. When the angle between the stretching direction A2 and the alignment direction A1 is positive, the circularly polarized light generated by the optical component is left-handed circularly polarized light; conversely, when the angle between the stretching direction A2 and the alignment direction A1 is negative, the circularly polarized light generated by the optical component is right-handed circularly polarized light. Figure 2 As shown, when the angle between the stretching direction A2 and the orientation direction A1 is a positive angle, the positive angle is the angle formed by the stretching direction A2 rotating in a clockwise direction relative to the orientation direction A1, such as Figure 2 The +45° angle between the stretching direction A2 and the orientation direction A1 shown in (A) is shown in FIG. Conversely, when the angle between the stretching direction A2 and the orientation direction A1 is a negative angle, the negative angle is the angle formed by the stretching direction A2 rotating counterclockwise relative to the orientation direction A1, such as Figure 2 The angle between the stretching direction A2 and the orientation direction A1 shown in (B) is -45°. And, when the angle between the stretching direction A2 and the orientation direction A1 is 0°, the stretching direction A2 and the orientation direction A1 are arranged in parallel. In some embodiments, the angle between the stretching direction A2 and the orientation direction A1 provided in the embodiment of the present application can be +45° or -45°, and this application does not make specific restrictions on this. In practical applications, other angles can also be designed according to actual needs.

[0051] As can be seen from the above content, the technical solution provided in the embodiment of the present application is that the optical component is formed by stacking a liquid crystal box 100 based on a positive nematic phase liquid crystal layer 140 and a phase retarder 200, and by precisely controlling the stacking angle of the stretching direction A2 of the phase retarder 200 and the alignment direction A1 of the alignment film, a twisted stacking structure is constructed, and a luminous efficiency of 95% is achieved based on the Jones matrix mechanism, thereby constructing a high g lum and high FOM value systems, where g lum The FOM value can be as high as 1.28, and the FOM value can be as high as 1.22. The liquid crystal box 100 is composed of a positive nematic phase liquid crystal layer 140 and a doped first fluorescent dye and a photoinitiator. Not only can the liquid crystal box 100 be designed with any shape pattern, but the liquid crystal box 100 can also provide excellent linear polarized light emission, and the liquid crystal is adjusted by the electric field of the first electrode 121 and the second electrode 122 to achieve the purpose of multi-responsivity, so that the optical component provided in the embodiment of the present application has high g lum and high FOM values, multi-responsivity and arbitrary patterning capabilities.

[0052] It can be understood that the liquid crystal is regulated by the electric field of the first electrode 121 and the second electrode 122, that is, the electro-optical effect of the positive nematic phase liquid crystal is used to change the orientation of the liquid crystal molecules in the vertical electric field of the first electrode 121 and the second electrode 122 (the direction of the plane where the liquid crystal box 100 is located), thereby achieving reversible regulation of the strength of the circularly polarized light emitting signal. Among them, the voltage applied to the first electrode 121 and the second electrode 122 in the embodiment of the present application can be a sine wave voltage of 40V and a frequency of 1kHz.

[0053] In some embodiments, the material of the positive nematic liquid crystal layer 140 provided in the embodiment of the present application may include at least one of E7, 5CB, 6CB, and 8CB. And / or, the first fluorescent dye includes at least one of coumarin 6, rubrene, 9,10-dimethylanthracene, and Nile red. And / or, the photoinitiator includes at least one of I-651 and I-1173. And / or, the material of the phase retarder 200 includes at least one of PVA (polyvinyl alcohol), PE (polyethylene), PET (polyethylene dibutyl terephthalate), and D4 (aqueous polyurethane). And, the first electrode 121 and the second electrode 122 provided in the embodiment of the present application may be transparent electrodes, and their materials may be indium tin oxide, etc. It should be noted that the positive nematic liquid crystal layer 140, the first fluorescent dye, the photoinitiator, the phase retarder 200, the first electrode 121 and the second electrode 122 provided in the present application are not limited to the several materials provided above, and other materials may be selected in some other embodiments of the present application, and the present application does not make specific restrictions on this.

[0054] In some embodiments, the doping concentration of the first fluorescent dye provided in the embodiment of the present application may be 0.01-50.25 wt %. Also, the cell thickness of the liquid crystal cell 100 provided in the embodiment of the present application (ie, the thickness of the positive nematic phase liquid crystal layer 140 ) may be 7-36 μm.

[0055] Combined with the preparation process of the optical component provided by the embodiment of the present application, the optical component provided by the embodiment of the present application is described in more detail. First, a liquid crystal box 100 is prepared, and a mixture containing a positive nematic phase liquid crystal material, a first fluorescent dye, and a photoinitiator is heated to a set temperature (the set temperature can be 70 to 150 degrees Celsius) and injected into the liquid crystal box 100 (i.e., injected between the first orientation film 131 and the second orientation film 132 relative to each other) after being isotropic, and kept in the isotropic state for a certain period of time and then cooled to room temperature, and irradiated with 365nm ultraviolet light for a set time (the set time can be 30 minutes) for polymerization; then a phase retarder 200 is prepared, and a polymer film of a preset material and a preset thickness (the preset thickness can be 80 microns) is uniaxially stretched and oriented (i.e., stretching direction A2) to obtain a phase retarder 200, and then the phase retarder 200 is covered on the prepared liquid crystal box 100, and the stacking angle is precisely controlled to construct a twisted stacking structure, and the stacking angle (i.e., orientation direction A1 and stretching direction A2) can be -90° to +90°.

[0056] In some embodiments, the material of the positive nematic phase liquid crystal layer 140 of the optical component provided in the embodiment of the present application may be E7, the first fluorescent dye may be coumarin 6 (3-(2-benzothiazolyl)-7-(diethylamino)), the photoinitiator may be I-651 (2,2-dimethoxy-2-phenylacetophenone), and the material of the phase retarder 200 may be polyvinyl alcohol (PVA). The preparation process of the optical component may include: first preparing a liquid crystal box 100, heating a mixture containing E7, coumarin 6, and I-651 to 120 degrees Celsius to an isotropic state, and then injecting it into the liquid crystal box 100, and keeping it at 120 degrees Celsius for 10 minutes, then cooling it to room temperature at a rate of 2 degrees Celsius / min, and then irradiating it with 365nm ultraviolet light for 30 minutes for polymerization, wherein the doping concentration of coumarin 6 is determined by optimization testing to be in the range of 0.01-50.25 wt% to balance the luminous efficiency and optical activity. Then prepare the phase retarder 200, select a PVA film with a thickness of 80 microns for uniaxial stretching, and the stretching degree can be 2 times to prepare the phase retarder 200. Optionally, the phase retarder 200 provided in the present embodiment can be obtained by using a stretching device to stretch the 80-micron PVA film at 85 degrees Celsius with a stretching degree of γ=6.3; specifically, the PVA film is balanced at 85 degrees Celsius for 10 minutes before stretching, and then stretched at a rate of 0.1 mm / s. The initial distance between the clamps before stretching is 20 mm, and the stretching degree γ is represented by the semi-axis ratio of the ellipse drawn on the stretched and deformed PVA film, and is calculated according to the formula (γ=a / b, where a is the length of the major semi-axis of the ellipse, and b is the length of the minor semi-axis of the ellipse). Finally, the obtained phase retarder 200 is covered on the prepared liquid crystal box 100, and the stacking angle is precisely controlled to construct a twisted stacking structure to obtain an optical component, wherein the stacking angle can be +45° or -45°.

[0057] Based on the same inventive concept, the present application also provides an optical encryption device. Figure 3 As shown, it is a schematic diagram of the structure of an optical encryption device provided in an embodiment of the present application, wherein the optical encryption device provided in an embodiment of the present application includes: at least one optical component 10 provided in any of the above embodiments, the optical component 10 also includes a polymerizable liquid crystal monomer and / or a second fluorescent dye doped in the positive nematic phase liquid crystal layer 140, wherein the first fluorescent dye and the second fluorescent dye meet the fluorescence resonance energy transfer condition. In some embodiments, the polymerizable liquid crystal monomer provided in an embodiment of the present application includes at least one of RM257, RM82, and LC756; and / or the second fluorescent dye includes spiropyran. Figure 3 Schematic diagram of an optical encryption device in which optical components 10 are arranged in an M*N array, such as Figure 3The optical encryption device is shown as a 4*4 array arrangement. This application does not impose any specific restrictions on the number and arrangement of the optical components 10 included in the optical encryption device, and a specific design needs to be performed based on actual applications.

[0058] It can be understood that in the optical component 10 provided in the embodiment of the present application, applying voltage to the first electrode 121 and the second electrode 122 can adjust the circularly polarized luminescence signal intensity generated by the optical component 10. At this time, the circularly polarized luminescence signal intensity not less than the set intensity (the set intensity is 110000) can be set to "1", and the circularly polarized luminescence signal intensity less than the set intensity can be set to "0". In addition, the polymerizable liquid crystal monomer provided in the embodiment of the present application will undergo a polymerization reaction after being stimulated by an external stimulus, such as the polymerizable liquid crystal monomer undergoing a polymerization reaction after being irradiated by ultraviolet light, so that the circularly polarized luminescence of the optical component at the polymerized part and the circularly polarized luminescence at the non-polymerized part are different. At this time, the optical component 10 can be stimulated to polymerize the polymerizable liquid crystal monomer and set to "1", and the optical component 10 can be not stimulated to polymerize the polymerizable liquid crystal monomer and set to "0". The first fluorescent dye and the second fluorescent dye provided in the embodiment of the present application undergo fluorescence resonance energy transfer when subjected to external stimulation, such as fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye after ultraviolet light irradiation, so that the light color emitted by the optical component at the location where fluorescence resonance energy transfer occurs is different from the light color emitted by the location where fluorescence resonance energy transfer does not occur. At this time, the stimulation of the first fluorescent dye and the second fluorescent dye on the optical component 10 can be set to "1", and the stimulation of the first fluorescent dye and the second fluorescent dye on the optical component 10 can be set to "0". Thus, by adjusting the circularly polarized luminescence signal intensity, polymerizing stimulation and fluorescent dye stimulation on the optical component 10, the optical component 10 presents different fluorescence and circularly polarized luminescence changes. Based on these changes and based on the number and arrangement of the optical components 10, light-controlled switchable logic gates, information encoding and information encryption can be constructed to meet the application requirements in the fields of multi-dimensional data encoding, advanced anti-counterfeiting and information encryption. Not only can the array be integrated to construct a complex logic circuit to realize multi-data bit operation processing for the development of logic computing chips, but it can also increase the difficulty of information cracking, meet advanced encryption requirements, and effectively protect information security in visual display.

[0059] Based on the same inventive concept, an embodiment of the present application also provides an encryption method, which is applied to the optical encryption device provided in any of the above embodiments, wherein the optical component 10 also includes a polymerizable liquid crystal monomer doped in the positive nematic liquid crystal layer 140, wherein the encryption method includes: stimulating the optical component 10 based on an encryption mask so that the polymerizable liquid crystal monomer of the optical component 10 at the encryption pattern is polymerized to form a solid liquid crystal polymer, wherein the encryption pattern is a hollow pattern of the encryption mask 21; it should be noted that the stimulation method for the optical component 10 provided in the embodiment of the present application is not specifically limited, and it only needs to satisfy the requirement of causing the polymerizable liquid crystal monomer to undergo a polymerization reaction, such as ultraviolet light irradiation stimulation. Specific combination Figure 4 As shown, it is a schematic diagram of an encryption principle provided by an embodiment of the present application, taking the encryption pattern as a panda encryption pattern as an example, and taking the first fluorescent dye as coumarin 6 as an example for encryption description. Wherein, without applying voltage to the first electrode 121 and the second electrode 122, the optical component 10 is stimulated by ultraviolet light irradiation based on the encryption mask 21 with a panda hollow pattern, so that the polymerizable liquid crystal monomers at the optical component 10 corresponding to the panda hollow pattern are polymerized to form a solid liquid crystal polymer, thereby completing the encryption process. Continue to refer to Figure 4 As shown, since the polymerizable liquid crystal monomer is polymerized into a solid liquid crystal polymer when exposed to ultraviolet light, after a voltage (Power On) is applied to the first electrode 121 and the second electrode 122 of the optical component 10, the solid liquid crystal polymer at the position corresponding to the panda encryption pattern of the optical component 10 does not twist in the electric field, and when the first fluorescent dye is excited to produce green fluorescence, the circularly polarized light emission at the position corresponding to the panda encryption pattern of the optical component 10 is different from the circularly polarized light emission at other positions, thereby displaying the panda encryption pattern; at this time, no encryption pattern is displayed under observation through a right-handed circular polarizing filter (R-CPF), and the panda encryption pattern is displayed more clearly under observation through a left-handed circular polarizing filter (L-CPF). Furthermore, when no voltage is applied to the first electrode 121 and the second electrode 122 of the optical component 10 (Power Off), when the first fluorescent dye is excited to produce green fluorescence, the circularly polarized light emitted at the location corresponding to the panda encryption pattern of the optical component 10 is the same as the circularly polarized light emitted at other locations, thereby making it impossible to display the panda encryption pattern; at this time, the panda encryption pattern is not displayed under ideal circumstances, whether observed under a right-handed circular polarizing filter (R-CPF) or under a left-handed circular polarizing filter (L-CPF).

[0060] Figure 4The principle of encrypting the optical component 10 by ultraviolet light irradiation when no voltage is applied to the first electrode 121 and the second electrode 122 of the optical component 10 is illustrated. In some embodiments, the embodiment of the present application can also stimulate the optical component 10 for encryption when a voltage is applied to the first electrode 121 and the second electrode 122 of the optical component 10; that is, the optical component 10 also includes a polymerizable liquid crystal monomer doped in the positive nematic liquid crystal layer 140, wherein the encryption method includes: applying a preset voltage to the first electrode 121 and the second electrode 122; stimulating the optical component 10 based on an encryption mask so that the polymerizable liquid crystal monomer of the optical component 10 at the encryption pattern is polymerized to form a solid liquid crystal polymer, wherein the encryption pattern is a hollow pattern of the encryption mask. Specifically combined with Figure 5 As shown, another schematic diagram of the encryption principle provided by an embodiment of the present application is taken as an example of an encryption pattern being a butterfly encryption pattern, and the encryption is explained by taking the first fluorescent dye being coumarin 6 and the polymerizable liquid crystal monomer being RM257 as an example. First, a preset voltage is applied to the first electrode 121 and the second electrode 122 of the optical component 10, and then after the long axis of the liquid crystal in the optical component 10 is parallel to the vertical electric field, the optical component 10 is stimulated by ultraviolet light irradiation based on the encryption mask 22 having a butterfly hollow pattern, so that the polymerizable liquid crystal monomer at the optical component 10 corresponding to the butterfly hollow pattern is polymerized to form a solid liquid crystal polymer, thereby completing the encryption process. Continue to refer to Figure 5 As shown, since the polymerizable liquid crystal monomer is polymerized into a solid liquid crystal polymer when exposed to ultraviolet light, when no voltage is applied to the first electrode 121 and the second electrode 122 of the optical component 10 (Power Off), the solid liquid crystal polymer at the optical component 10 corresponding to the butterfly encryption pattern cannot be restored, and when the first fluorescent dye is excited to produce green fluorescence, the circularly polarized light emission at the optical component 10 corresponding to the butterfly encryption pattern is different from the circularly polarized light emission at other locations, thereby displaying the butterfly encryption pattern; at this time, no encryption pattern is displayed under observation through a right-handed circular polarizing filter (R-CPF), and the butterfly encryption pattern is displayed more clearly under observation through a left-handed circular polarizing filter (L-CPF). Furthermore, when a voltage is applied (Power On) to the first electrode 121 and the second electrode 122 of the optical component 10, when the first fluorescent dye is excited to produce green fluorescence, the circularly polarized light emission at the optical component 10 corresponding to the butterfly encryption pattern is the same as the circularly polarized light emission at other locations, so that the butterfly encryption pattern cannot be displayed; at this time, the butterfly encryption pattern is not displayed under ideal circumstances whether it is observed under a right-handed circular polarizing filter (R-CPF) or under a left-handed circular polarizing filter (L-CPF).

[0061] In some embodiments, the encryption pattern provided in the embodiments of the present application can be any regular or irregular pattern such as text, numbers, letters, graphics, etc., and the present application does not make specific restrictions on this. For example, in some embodiments, the encryption pattern can be ASCII code and Chinese character information.

[0062] It can be understood that the embodiments of the present application provide Figure 4 and Figure 5 The encryption principle in the case of doping polymerizable liquid crystal monomers in the positive nematic liquid crystal layer 140 of the optical component 10 is illustrated, that is, the principle of patterned encryption of electrical response and photopolymerization response. In the field of 3D display, the electrical response regulation technology has brought innovative applications to the circularly polarized luminescence characteristics. Based on the electro-optical effect of the positive nematic liquid crystal material, by accurately applying voltage to the first electrode 121 and the second electrode 122, the orientation state of the liquid crystal molecules can be effectively changed, thereby achieving reversible modulation of the circularly polarized luminescence signal intensity, providing a powerful means for optimizing the 3D display effect. For example, when a specific 40V and 1kHz sine wave voltage is applied to the first electrode 121 and the second electrode 122, the liquid crystal molecules will quickly align vertically. This orientation change breaks the original twisted stacking structure of the liquid crystal molecules, causing the circularly polarized luminescence signal intensity to be significantly weakened. Once the voltage applied to the first electrode 121 and the second electrode 122 is removed, the liquid crystal molecules can quickly return to their initial orientation by virtue of their own characteristics, and the circularly polarized luminescence performance is also perfectly restored. After multiple cycles of testing, this process is not only stable and reliable, but also has no energy decay phenomenon, ensuring the continuity and stability in 3D display applications. It is particularly noteworthy that by using voltage-assisted and photopolymerization technology to fix the orientation of polymerizable liquid crystal monomers, combined with the unique process of mask lithography, it is possible to achieve "negative etching ( Figure 4 Schematic diagram of mask-based encryption of optical components 10) and "positive etching ( Figure 5 The invention discloses an encryption method for optical components 10 based on a mask)" effect, thereby preparing highly programmable encryption patterns, such as lifelike "panda" and "butterfly" and other complex encryption patterns can be accurately presented. These encryption patterns show rich and varied visual effects under different electric field strengths and polarized light conditions. In 3D display scenes, this feature greatly enhances the dimension of information encryption, can bring more immersive and personalized 3D visual experience to the audience, effectively improves the security and interactivity of 3D display, and opens up a new path for the development of future 3D display technology.

[0063] Based on the same inventive concept, an embodiment of the present application also provides an encryption method, which is applied to the optical encryption device provided in any of the above embodiments, wherein the optical component 10 also includes a second fluorescent dye doped in the positive nematic liquid crystal layer 140, wherein the encryption method includes: stimulating the optical component 10 based on a first encryption mask so that the optical component 10 realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at a first encryption pattern, wherein the first encryption pattern is a hollow pattern of the first encryption mask. It should be noted that the stimulation method for the optical component 10 provided in the embodiment of the present application is not specifically limited, and it only needs to satisfy the requirement of achieving fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye, such as ultraviolet light irradiation stimulation. Specific combination Figure 6 As shown, it is another schematic diagram of the encryption principle provided by the embodiment of the present application, taking the first encryption pattern as the letter A encryption pattern as an example, and taking the first fluorescent dye as coumarin 6 as an example, and the second fluorescent dye as spiropyran as an example for encryption explanation, wherein, the positive nematic phase liquid crystal layer 140 introduces 1,3,3-trimethylindoline-6'-nitrobenzopyran spirocyclic chromophore to construct a light response system, based on the principle of fluorescence resonance energy transfer (FRET), under ultraviolet light irradiation, spiropyran is converted from a closed ring state to an open ring state (MC form), causing a red shift in the wavelength of circularly polarized light emission and a chirality inversion. Based on this, the encryption method provided by the embodiment of the present application is: based on the first encryption mask with the letter A hollow pattern, the optical component 10 is irradiated with ultraviolet light, so that the optical component 10 realizes the fluorescence resonance energy transfer of the first fluorescent dye and the second fluorescent dye at the letter A encryption pattern, and completes the encryption writing process of the letter A; wherein, when the fluorescent dye is excited to generate fluorescence, the letter A encryption pattern is red fluorescence, and the letter A encryption pattern is green fluorescence.

[0064] Furthermore, the first encryption pattern provided in the embodiment of the present application can also be erased, and then a new encryption pattern is written. That is, the encryption method also includes: controlling the second fluorescent dye of the optical component 10 at the first encryption pattern to be ineffective; stimulating the optical component 10 based on the second encryption mask so that the optical component 10 realizes the fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the second encryption pattern, wherein the second encryption pattern is a hollow pattern of the second encryption mask. Continue to refer to Figure 6As shown, first, the second fluorescent dye at the encrypted pattern of letter A is controlled to fail. In some embodiments, the second fluorescent dye at the encrypted pattern of letter A can be controlled to fail by continuous ultraviolet light irradiation, visible light irradiation, or heating, thereby completing the erasing operation of the encrypted pattern of letter A; then, the optical component 10 is stimulated by ultraviolet light irradiation based on the second encryption mask with a two-dimensional code hollow pattern, so that the optical component 10 realizes the fluorescence resonance energy transfer of the first fluorescent dye and the second fluorescent dye at the encrypted pattern of the two-dimensional code, and completes the writing process of the encrypted pattern of the two-dimensional code, wherein when the fluorescent dye is excited to produce fluorescence, the encrypted pattern of the two-dimensional code is red fluorescence, and the outside of the encrypted pattern of the two-dimensional code is green fluorescence. In addition, the display effect of the encrypted pattern of the two-dimensional code under the observation of the right-handed circular polarization filter (R-CPF) is different from that of the encrypted pattern of the two-dimensional code under the observation of the left-handed circular polarization filter (L-CPF). The encrypted pattern of the two-dimensional code is displayed more clearly under the observation of the left-handed circular polarization filter (L-CPF), based on which the decryption display of the encrypted pattern can be realized.

[0065] It can be understood that the embodiments of the present application provide Figure 6 The encryption principle when the second fluorescent dye is doped in the positive nematic liquid crystal layer 140 of the optical component 10, that is, the principle of photoresponsive patterned encryption, is illustrated. In 3D display applications, photoresponsive patterning technology shows great potential. By utilizing the photoresponsive characteristics of the material, combined with mask lithography and thermal and optical processing methods, the circularly polarized light emitting pattern can be erasable and repeatedly programmed. Taking specific patterns as an example, such as the letter A encryption pattern and the QR code encryption pattern, these erasable patterns can be used as important elements for information encryption in 3D display scenarios. By reading these patterns with different polarized light, the encryption and decryption process of information in 3D display can be realized, which greatly improves the information security and encryption level of 3D display content. Combined with Figure 6 From the relevant description, it can be known that the encryption pattern is written by 365nm ultraviolet light, and then erased by continuous ultraviolet light irradiation, heating or visible light irradiation, and then a new pattern can be written by 365nm ultraviolet light again, such as changing from a simple letter A encryption pattern to a QR code encryption pattern. In 3D display applications, this flexibly programmable circularly polarized light emission pattern can be used to present a variety of 3D visual effects, such as displaying different 3D scenes or objects through different polarized lights, bringing a richer and safer visual experience to 3D display.

[0066] Based on the same inventive concept, the embodiment of the present application also provides an encryption method, which is applied to the optical encryption device provided in any of the above embodiments, wherein the optical component 10 also includes a polymerizable liquid crystal monomer and a second fluorescent dye doped in the positive nematic liquid crystal layer, wherein the encryption method includes: stimulating the optical component 10 based on the third encryption mask 23, so that the polymerizable liquid crystal monomer of the optical component 10 at the third encryption pattern is polymerized to form a solid liquid crystal polymer, and at the same time, the optical component 10 realizes the fluorescence resonance energy transfer of the first fluorescent dye and the second fluorescent dye at the third encryption pattern, wherein the third encryption pattern includes a polymerization area 231 and a first encryption part 232, and the third encryption pattern 23 is a hollow pattern of the third encryption mask. A preset voltage is applied to the first electrode 121 and the second electrode 122. Based on the fourth encryption mask 24, the optical component 10 is stimulated so that the polymerizable liquid crystal monomer of the optical component 10 at the second encryption part 233 of the polymerization area 231 is polymerized to form a solid liquid crystal polymer, and at the same time, the second fluorescent dye of the optical component 10 at the second encryption part 233 is controlled to be ineffective. Figure 7As shown, it is another schematic diagram of encryption principle provided by an embodiment of the present application, taking the combination of the first encryption part 232 and the second encryption part 233 into a butterfly encryption pattern as an example, and taking the first fluorescent dye as coumarin 6, the second fluorescent dye as spiropyran, and the polymerizable liquid crystal monomer as RM257 as an example for encryption description. First, without applying voltage to the first electrode 121 and the second electrode 122, the optical component 10 is stimulated by 365nm ultraviolet light based on the third encryption mask 23 with corresponding polymerization area 231 and the hollow pattern of the first encryption part 232, so that the optical component 10 realizes the fluorescence resonance energy transfer of the first fluorescent dye and the second fluorescent dye at the polymerization area 231 and the first encryption part 232 (the right half of the butterfly encryption pattern 232 in the figure), and realizes the polymerization of the polymerizable liquid crystal monomer to form a solid liquid crystal polymer. At this time, when the fluorescent dye is excited to generate fluorescence, the polymerization area 231 and the first encryption part 232 are red fluorescence, and the rest are green fluorescence. After applying a preset voltage to the first electrode 121 and the second electrode 122, the optical component 10 is stimulated by 365nm ultraviolet light irradiation based on the fourth encryption mask 24 having a hollow pattern corresponding to the second encryption part 233, so that the polymerizable liquid crystal monomer of the optical component 10 at the second encryption part 233 (the left half of the butterfly encryption pattern 233 in the figure) in the polymerization area 231 is polymerized to form a solid liquid crystal polymer, and at the same time, the second fluorescent dye of the optical component 10 at the second encryption part 233 is controlled to be ineffective. At this time, when the fluorescent dye is excited to produce fluorescence, the area except the second encryption part 233 and the first encryption part 232 in the polymerization area 231 is red fluorescence, and the remaining part including the second encryption part 233 is green fluorescence, as shown in FIG. Figure 7 In the figure, ① the fluorescent display pattern is displayed, thereby completing the encryption writing of the optical component 10.

[0067] Furthermore, after completing Figure 7 After the encrypted writing of the fluorescent display pattern, the encrypted pattern can be deformed in more ways. In some embodiments, after the optical component 10 is stimulated based on the fourth encryption mask 24, the encryption method further includes: controlling the second fluorescent dye of the optical component 10 to be ineffective. Figure 7 As shown, the embodiment of the present application can use continuous ultraviolet light irradiation, visible light irradiation, or heating to control the second fluorescent dye in the polymerization area 231 except the second encryption part 233 and the first encryption part 232 to fail. At this time, the encryption method is Figure 7 In ①, it is transformed into Figure 7②. It can be understood that, since the polymerizable liquid crystal monomers corresponding to the second encryption part 233 are polymerized when a voltage is applied to the liquid crystal box 100 (i.e., a preset voltage is applied to the first electrode 121 and the second electrode 122), and the polymerizable liquid crystal monomers corresponding to the area other than the second encryption part 233 in the polymerization area 231 and the first encryption part 232 are polymerized when no voltage is applied to the liquid crystal box 100, when the fluorescent dye is excited to generate fluorescence and no voltage is applied to the first electrode 121 and the second electrode 122 (Power Off), the encryption pattern of the second encryption part 233 is displayed, such as Figure 7 When the fluorescent dye is excited to generate fluorescence and a voltage is applied to the first electrode 121 and the second electrode 122 (Power On), the encrypted pattern of the first encrypted portion 232 is displayed, such as Figure 7 The fluorescent display pattern in ③ (the right half of the butterfly encryption pattern 232).

[0068] Optionally, in the technical solution provided by the embodiment of the present application, after the second fluorescent dye controlling the optical component 10 fails, the encryption method further comprises: stimulating the optical component 10 based on a fifth encryption mask, so that the optical component 10 realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the aggregation area 231 outside the second encryption part 233 and the first encryption part 232, wherein the fifth encryption mask corresponds to a hollow pattern at the aggregation area 231 outside the second encryption part 233 and the first encryption part 232. Figure 7 As shown, the optical component 10 is stimulated by ultraviolet light based on the fifth encryption mask having the hollow pattern of the polymerization area 231 and the first encryption part 232 corresponding to the second encryption part 233, so that the optical component 10 realizes the fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye in the polymerization area 231 except the second encryption part 233 and the first encryption part 232, thereby realizing Figure 7 The fluorescence display pattern of ② Figure 7 The restoration of the fluorescent display pattern in ① achieves flexible encryption control and improves the encryption effect.

[0069] In summary, the embodiments of the present application provide an optical component, an optical encryption device and an encryption method, wherein the optical component includes: a liquid crystal box, wherein the liquid crystal box includes: a sealed box body; a first electrode and a second electrode, wherein the first electrode and the second electrode are located in the sealed box body and are arranged opposite to each other; a first orientation film and a second orientation film, wherein the first orientation film is located on the side of the first electrode facing the second electrode, and the second orientation film is located on the side of the second electrode facing the first electrode, and the orientation directions of the first orientation film and the second orientation film are the same; a positive liquid crystal layer, wherein the positive nematic liquid crystal layer is located between the first orientation film and the second orientation film, and the positive nematic liquid crystal layer is doped with a first fluorescent dye and a photoinitiator; a phase delay plate, wherein the phase delay plate covers the surface of the liquid crystal box on the first electrode side, and the stretching direction of the phase delay plate and the orientation direction of the first orientation film are at an angle of -90° to +90°.

[0070] As can be seen from the above content, the technical solution provided in the embodiment of the present application is that the optical component is formed by stacking a liquid crystal cell based on a positive nematic liquid crystal layer and a phase retarder, and the stacking angle of the phase retarder and the orientation direction of the orientation film are precisely controlled to construct a twisted stacking structure, thereby constructing a high g lum The liquid crystal box is composed of a positive nematic phase liquid crystal layer and a doped first fluorescent dye and a photoinitiator. Not only can the liquid crystal box be designed with any shape pattern, but the liquid crystal box can also provide excellent linear polarized light emission, and the liquid crystal is adjusted by the electric field of the first electrode and the second electrode to achieve the purpose of multi-responsivity, so that the optical component provided in the embodiment of the present application has a high g lum and high FOM value, multi-responsiveness and arbitrary patterning capability. In addition, the optical encryption device provided in the embodiment of the present application is prepared based on optical components. Since the optical encryption device includes a polymerizable liquid crystal monomer and / or a second fluorescent dye doped in a positive nematic phase liquid crystal layer, the circularly polarized light emitted by the optical components can be adjusted by a variety of external stimuli, so that a variety of encryption methods can be designed for the optical encryption device to meet the application requirements in the fields of multi-dimensional data encoding, advanced anti-counterfeiting and information encryption.

[0071] In the description of the embodiments of the present application, it needs to be understood that the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0072] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0075] In the embodiments of the present application, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples without contradiction.

[0076] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An optical component, characterized in that: include: A liquid crystal box, the liquid crystal box comprising: a sealed box body; a first electrode and a second electrode, the first electrode and the second electrode are located in the sealed box body and are arranged opposite to each other; a first orientation film and a second orientation film, the first orientation film is located on the side of the first electrode facing the second electrode, the second orientation film is located on the side of the second electrode facing the first electrode, and the orientation directions of the first orientation film and the second orientation film are the same; a positive liquid crystal layer, the positive nematic liquid crystal layer is located between the first orientation film and the second orientation film, and the positive nematic liquid crystal layer is doped with a first fluorescent dye and a photoinitiator; A phase retarder covers the surface of the liquid crystal box on the first electrode side, and a stretching direction of the phase retarder and an orientation direction of the first orientation film form an angle of -90° to +90°.

2. The optical component according to claim 1, characterized in that: The material of the positive nematic liquid crystal layer includes at least one of E7, 5CB, 6CB, and 8CB; And / or, the first fluorescent dye includes at least one of coumarin 6, rubrene, 9,10-dimethylanthracene, and Nile red; And / or, the photoinitiator includes at least one of I-651 and I-1173; And / or, the material of the phase retarder includes at least one of PVA, PE, PET, and D4.

3. The optical component according to claim 1, characterized in that: The doping concentration of the first fluorescent dye is 0.01 to 50.25 wt %.

4. An optical encryption device, characterized in that: include: At least one optical component according to any one of claims 1 to 3, further comprising a polymerizable liquid crystal monomer and / or a second fluorescent dye doped in the positive nematic liquid crystal layer, wherein the first fluorescent dye and the second fluorescent dye satisfy a fluorescence resonance energy transfer condition.

5. The optical encryption device according to claim 4, characterized in that: The polymerizable liquid crystal monomer includes at least one of RM257, RM82, and LC756; And / or, the second fluorescent dye comprises spiropyran.

6. An encryption method, characterized in that: Applicable to the optical encryption device according to claim 4 or 5, the optical component further comprises a polymerizable liquid crystal monomer doped in the positive nematic liquid crystal layer, wherein the encryption method comprises: Stimulating the optical component based on the encryption mask so that the polymerizable liquid crystal monomer of the optical component at the encryption pattern is polymerized to form a solid liquid crystal polymer, wherein the encryption pattern is a hollow pattern of the encryption mask; Alternatively, the encryption method comprises: applying a preset voltage to the first electrode and the second electrode; The optical component is stimulated based on the encryption mask, so that the polymerizable liquid crystal monomer of the optical component at the encryption pattern is polymerized to form a solid liquid crystal polymer, wherein the encryption pattern is a hollow pattern of the encryption mask.

7. An encryption method, characterized in that: Applicable to the optical encryption device according to claim 4 or 5, the optical component further comprises a second fluorescent dye doped in the positive nematic liquid crystal layer, wherein the encryption method comprises: The optical component is stimulated based on the first encryption mask, so that the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at a first encryption pattern, wherein the first encryption pattern is a hollow pattern of the first encryption mask.

8. The encryption method according to claim 7, characterized in that: The encryption method further comprises: Controlling the second fluorescent dye of the optical component at the first encrypted pattern to fail; The optical component is stimulated based on the second encryption mask, so that the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the second encryption pattern, wherein the second encryption pattern is a hollow pattern of the second encryption mask.

9. An encryption method, characterized in that: Applicable to the optical encryption device according to claim 4 or 5, the optical component further comprises a polymerizable liquid crystal monomer and a second fluorescent dye doped in the positive nematic liquid crystal layer, wherein the encryption method comprises: Stimulating the optical component based on the third encryption mask so that the polymerizable liquid crystal monomer of the optical component at the third encryption pattern is polymerized to form a solid liquid crystal polymer, and at the same time, the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the third encryption pattern, wherein the third encryption pattern includes a polymerization area and a first encryption part, and the third encryption pattern is a hollow pattern of the third encryption mask; applying a preset voltage to the first electrode and the second electrode; The optical component is stimulated based on the fourth encryption mask so that the polymerizable liquid crystal monomer of the optical component at the second encryption part of the polymerization area is polymerized to form a solid liquid crystal polymer, and the second fluorescent dye of the optical component at the second encryption part is controlled to be ineffective.

10. The encryption method according to claim 9, characterized in that: After stimulating the optical component based on the fourth encryption mask, the encryption method further includes: controlling the second fluorescent dye of the optical component to be ineffective; Optionally, after the second fluorescent dye controlling the optical component fails, the encryption method further comprises: The optical component is stimulated based on the fifth encryption mask so that the optical component realizes fluorescence resonance energy transfer between the first fluorescent dye and the second fluorescent dye at the polymerization area outside the second encryption part and the first encryption part, wherein the fifth encryption mask is a hollow pattern corresponding to the polymerization area outside the second encryption part and the first encryption part.

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