Dynamic hologram production method, dynamic hologram film and light response method

Abstract

The present invention discloses a method for producing a dynamic hologram, a dynamic hologram film, and a light response method, and belongs to the field of holographic technology. The light-responsive dynamic hologram film of the present invention comprises a substrate layer, an information layer, and a protective layer; the information layer is provided with holographic stripes that can respond to external lighting. The present invention overcomes the shortcoming that traditional holograms cannot dynamically respond to incoherent light illumination. By providing a dynamic hologram film that can respond to incoherent light illumination, the design freedom of the hologram is greatly increased; at the same time, the light response form is novel. Regardless of whether there is bright ambient light illumination, under the illumination of a specified incoherent light source, the hologram of the present invention can realize dynamic responses such as displaying and hiding a preset pattern, moving and scaling the pattern with the light source, etc., which is impossible for traditional holograms to achieve. In addition, the light-responsive hologram has distinct characteristics, and the dynamic image is lifelike, which is very easy for ordinary people to recognize and remember.

Description

Technical Field

[0001] The invention relates to a dynamic hologram production method, a dynamic hologram film and a light response method, and belongs to the technical field of holography. Background Art

[0002] Holographic technology records the wavefront information of light waves through interference and then reconstructs it through diffraction, enabling the recording and display of true three-dimensional images. Holograms, carriers of three-dimensional information, are composed of numerous complex micro- and nanoscale grating structures. As is common knowledge in the field, achieving high-quality holograms requires extremely stringent vibration isolation conditions. Moving objects introduce vibrations, making it difficult to produce high-quality dynamic holograms using traditional holographic technology.

[0003] Computer-generated holograms can use a computational process to calculate interference fringes and then output them to form a hologram, thus avoiding the vibration problem caused by moving objects.

[0004] However, computer-generated holograms cannot respond to changes in external lighting, so their scope of use is limited.

[0005] The light-responsive property can inject new vitality into holograms, and has wide applications in display, security and anti-counterfeiting, virtual reality / augmented reality, etc. Existing technologies cannot meet this demand, so there is an urgent need for a hologram that can respond to external light.

[0006] The information disclosed in this Background Art is only for understanding the background of the present inventive concept and therefore it may include information that does not constitute prior art. Summary of the Invention

[0007] In response to the above problem or one of the above problems, an object of the present invention is to provide a method for producing a dynamic hologram. By constructing an image acquisition model, a hologram simulation model, a holographic fringe generation model, and a holographic dynamic display effect generation model, a hologram that can be dynamically displayed is obtained, and the production of a dynamic hologram that can respond to light is realized. This can effectively overcome the shortcoming that traditional holograms cannot dynamically respond to incoherent light illumination, and can respond to incoherent light illumination, greatly increasing the design freedom of the hologram. The solution is scientific, reasonable, and feasible.

[0008] In response to the above problem or one of the above problems, the second object of the present invention is to provide a dynamic hologram production method, a dynamic hologram film and a light response method, which can generate a distinctive light response hologram, the dynamic image is lifelike, and is very easy for ordinary people to recognize and remember, and is particularly suitable for display, security and anti-counterfeiting, virtual reality / augmented reality and other fields.

[0009] In response to the above problem or one of the above problems, the third object of the present invention is to provide a dynamic hologram production method, a dynamic hologram film and a light response method. The light response form is novel. Regardless of whether there is bright ambient light illumination, under the illumination of a specified incoherent light source, the hologram can realize dynamic responses such as displaying and hiding of preset patterns, movement and scaling of patterns with the light source, etc.

[0010] To achieve one of the above purposes, the first technical solution of the present invention is:

[0011] A method for producing a dynamic hologram capable of light response, comprising the following contents:

[0012] Obtain the preset patterns and dynamic effects that need to be displayed through the pre-built image acquisition model;

[0013] Use pre-built hologram simulation models to set up preset holograms based on preset patterns, dynamic effects, and lighting conditions;

[0014] A pre-built holographic fringe generation model is used to decompose a preset hologram into holographic units. The holographic fringes in the holographic units are determined based on the light field, dynamic effects, and illumination conditions of the preset pattern in the preset hologram, as well as the optical coupling relationship between the three, and are used to dynamically respond to external illumination.

[0015] Holographic stripes are generated according to a pre-built holographic dynamic display effect generation model and / or a holographic stripe physical output device to obtain a hologram that can be dynamically displayed, thereby realizing the production of a dynamic hologram that can respond to light.

[0016] After continuous exploration and experimentation, the present invention obtains a hologram that can be dynamically displayed by constructing an image acquisition model, a hologram simulation model, a holographic fringe generation model, and a holographic dynamic display effect generation model, thereby realizing the production of a dynamic hologram that can respond to light. This can effectively overcome the shortcoming of traditional holograms that cannot dynamically respond to incoherent light illumination, and can respond to incoherent light illumination, greatly increasing the design freedom of the hologram.

[0017] At the same time, the method for producing the light-responsive hologram of the present invention is simple, practical, feasible, easy to produce, and suitable for mass production.

[0018] Furthermore, the light-responsive hologram of the present invention has distinct features and lifelike dynamic images, which are very easy for ordinary people to recognize and remember. It is particularly suitable for display, security and anti-counterfeiting, virtual reality / augmented reality and other fields.

[0019] The model in this application is an object that objectively describes the morphological structure with the help of physical or virtual representation. The object is not equal to the physical body and is not limited to physical and virtual. It can be a data processing function, software program, processing mode, usage method, operation method, workflow, application process, electronic hardware, circuit module, processing system, system imitation or simulation object.

[0020] As preferred technical measures:

[0021] The preset pattern is a single plane pattern with a certain depth, or / and multiple plane patterns, or a multi-plane single pattern with discrete depths, or / and multiple patterns, or a three-dimensional model pattern with continuous depth, and its shape is a geometric pattern, or / and a text pattern, or / and a plant pattern, or / and an animal pattern, or / and a human pattern, or / and a landscape pattern, or / and an object pattern, or / and a natural phenomenon pattern, or / and a virtual digital pattern;

[0022] The dynamic effects include: translation, rotation, scaling of a single pattern, or / and relative translation, rotation, scaling of multiple patterns.

[0023] As preferred technical measures:

[0024] Using pre-built hologram simulation models, here's how to set up a preset hologram based on preset patterns, dynamic effects, and lighting conditions:

[0025] Acquiring characteristic information of an incoherent lighting source; the incoherent lighting source includes an incoherent point light source, an approximate point light source, a parallel light source, or a pre-set extended light source;

[0026] Generate lighting conditions based on the characteristic information of the incoherent light source;

[0027] Setting preset holograms based on lighting conditions, dynamic effects, and preset patterns, and according to hologram transformation algorithms;

[0028] The hologram transformation algorithm is an accurate Fourier transform hologram algorithm, a defocused Fourier transform hologram algorithm, a fractional Fourier transform hologram algorithm or a large depth of field Fresnel hologram algorithm.

[0029] As preferred technical measures:

[0030] Using the pre-built holographic fringe generation model and the preset hologram, the method for obtaining holographic fringes is as follows:

[0031] According to the preset hologram, several holographic units are set;

[0032] Arrange several holographic units closely to obtain a holographic unit array;

[0033] The holographic fringes in the holographic unit are determined based on the light field of the preset pattern in the preset hologram, the dynamic effect, the illumination conditions and the optical coupling relationship between the three, and are used to dynamically respond to external illumination;

[0034] The optical coupling relationship includes: a dynamic moiré imaging relationship between the incoherent light source, the holographic unit and the preset pattern; a holographic coupled wave imaging relationship between the incoherent light source and the holographic unit; and a far-field diffraction array imaging relationship between the holographic unit and the preset pattern.

[0035] As preferred technical measures:

[0036] The method for generating holographic stripes based on the pre-built holographic dynamic display effect generation model and the holographic stripe physical output device to obtain a hologram that can be dynamically displayed is as follows:

[0037] A hologram is formed by interfering the far-field diffracted light field of the holographic fringes, the preset pattern and its dynamic effect, with the reference light field corresponding to the set illumination conditions; the hologram is decomposed into holographic units, and all holographic units are physically outputted using the holographic fringes to obtain a dynamic hologram film object with light response;

[0038] The hologram is an accurate Fourier transform hologram including a preset pattern, a defocused Fourier transform hologram, a fractional Fourier transform hologram, or a large depth of field Fresnel hologram.

[0039] As preferred technical measures:

[0040] The method to obtain an accurate Fourier transform hologram is as follows:

[0041] The preset pattern is located on the front focal plane of the Fourier transform lens, and the accurate Fourier transform hologram is formed by the interference of the light field on the back focal plane and the reference light incident from the opposite side or the same side, which is located on the back focal plane of the Fourier transform lens;

[0042] Or / and, the method for obtaining a positive defocused Fourier transform hologram is as follows:

[0043] The preset pattern is located on the front focal plane of the Fourier transform lens, and the positive defocused Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident on the opposite side or the same side. The hologram is located on the output surface beyond one focal length of the Fourier transform lens;

[0044] Or / and, the method of obtaining a negative defocus Fourier transform hologram is as follows:

[0045] The preset pattern is located on the front focal plane of the Fourier transform lens, and the positive defocused Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident on the opposite side or the same side. The hologram is located on the output surface between the Fourier transform lens and the rear focal plane thereof;

[0046] Or / and, the method to obtain the fractional Fourier transform hologram is as follows:

[0047] The preset pattern is located on the input surface between the Fourier transform lens and its front focal plane, and the fractional Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident on the opposite side or the same side. The hologram is located on the output surface between the Fourier transform lens and its rear focal plane;

[0048] Alternatively or in combination, the method for obtaining a Fresnel hologram with a large depth of field is as follows:

[0049] The preset pattern is located on the input surface, and the large depth of field Fresnel hologram is generated by the distance hologram. Figure 1 The light field on the input surface at a certain distance is formed by the interference of the light field formed by Fresnel diffraction and the reference light incident from the opposite side or the same side, and the hologram is located on the output surface;

[0050] The distance between the input surface and the output surface is greater than the depth of field of the large-depth-of-field Fresnel hologram under ordinary diffuse light or extended light source illumination conditions.

[0051] To achieve one of the above purposes, the second technical solution of the present invention is:

[0052] A light-responsive dynamic hologram film comprises a substrate layer, an information layer, and a protective layer;

[0053] The information layer is located between the substrate layer and the protective layer; the information layer is provided with holographic stripes that can respond to external illumination; the holographic stripes include a closely arranged array of holographic units;

[0054] Each holographic unit in the holographic unit array is provided with a far-field hologram capable of forming a preset pattern or at least a part of the preset pattern;

[0055] The far-field hologram is composed of holographic fringes formed by the interference of the far-field diffraction light field of the preset pattern or at least part of the preset pattern with the set reference light field, and is used to respond to changes in the external illumination light source and produce a dynamic holographic imaging effect.

[0056] This invention overcomes the drawback of traditional holograms, which cannot dynamically respond to incoherent light illumination. By providing a dynamic hologram film that responds to incoherent light illumination, the design freedom of the hologram is significantly increased. Furthermore, the light-responsive hologram film of the present invention has a simple structure, is easily reproducible, and is suitable for mass production. Furthermore, the light-responsive hologram of the present invention has distinct features, and the dynamic images are lifelike, making it very easy for the general public to recognize and remember.

[0057] As preferred technical measures:

[0058] The far-field hologram includes an accurate Fourier transform hologram of a preset pattern or / and a defocused Fourier transform hologram or / and a fractional Fourier transform hologram or / and a Fresnel hologram with a large depth of field;

[0059] The preset pattern includes a single plane single pattern with a certain depth or / and multiple patterns or / and a multi-plane single pattern with discrete depths or / and multiple patterns or / and a three-dimensional model pattern with continuous depth;

[0060] The light source is an incoherent light source, including an incoherent point light source and / or an approximate point light source and / or a parallel light source and / or a preset extended light source.

[0061] To achieve one of the above purposes, the third technical solution of the present invention is:

[0062] A light-responsive method based on a dynamic hologram film, using the above-mentioned light-responsive dynamic hologram film, includes the following contents:

[0063] In a bright environment, when the set light source is turned on, the hologram displays a preset pattern that is visible to the human eye, and when the set light source is turned off, the preset pattern is invisible to the human eye;

[0064] In a bright environment, when the set light source is turned on, the preset pattern can move as the set light source moves;

[0065] Under the condition that the set light source is turned on, the preset pattern can be scaled along with the movement of the set light source.

[0066] The present invention overcomes the drawback of traditional holograms, which cannot dynamically respond to incoherent light illumination. By providing a dynamic hologram film that responds to incoherent light illumination, the design freedom of the hologram is greatly increased. Furthermore, the light response is novel. Regardless of whether there is bright ambient light illumination or not, under the illumination of a specified incoherent light source, the hologram of the present invention can achieve dynamic responses such as displaying and hiding a preset pattern, and moving and scaling the pattern with the light source, which is unattainable with traditional holograms. Furthermore, the light-responsive hologram film of the present invention has a simple structure, is easy to replicate, and is suitable for mass production. Furthermore, the light-responsive hologram has distinct characteristics, and the dynamic images are lifelike, making it very easy for the general public to recognize and remember.

[0067] As preferred technical measures:

[0068] The mobile form includes the following:

[0069] When the light source is set to translate parallel to the hologram surface, the preset pattern translates in the same direction as the light source; when the light source is set to rotate clockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates clockwise around the axis perpendicular to the hologram; when the light source is set to rotate counterclockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates counterclockwise around the axis perpendicular to the hologram along with the light source;

[0070] Or, when the light source is set to translate along a surface parallel to the hologram, the preset pattern translates in the opposite direction relative to the light source;

[0071] When the light source is set to rotate clockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates counterclockwise around the axis perpendicular to the hologram; when the light source is set to rotate counterclockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates clockwise around the axis perpendicular to the hologram;

[0072] Or / and, the scaling form includes the following:

[0073] When the light source is set to move upward perpendicular to the hologram surface, the preset pattern is enlarged, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is reduced; or, when the light source is set to move upward perpendicular to the hologram surface, the preset pattern is reduced, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is enlarged; or, when the light source is set to move upward perpendicular to the hologram surface, the preset pattern is first reduced and then enlarged, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is first enlarged and then reduced; or, when the light source is set to move upward perpendicular to the hologram surface, the preset pattern is first enlarged and then reduced, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is first reduced and then enlarged;

[0074] Or / and, the hologram is a reflective volume hologram or a transmissive plane hologram.

[0075] To achieve one of the above purposes, the fourth technical solution of the present invention is:

[0076] An electronic device comprising:

[0077] one or more processors;

[0078] a storage device for storing one or more programs;

[0079] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned method for producing a dynamic hologram capable of light response.

[0080] To achieve one of the above objectives, the fifth technical solution of the present invention is:

[0081] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned method for producing a dynamic hologram capable of light response.

[0082] Compared with the existing technical solutions, the present invention has the following beneficial effects:

[0083] After continuous exploration and experimentation, the present invention obtains a hologram that can be dynamically displayed by constructing an image acquisition model, a hologram simulation model, a holographic fringe generation model, and a holographic dynamic display effect generation model, thereby realizing the production of a dynamic hologram that can respond to light. This can effectively overcome the shortcoming of traditional holograms that cannot dynamically respond to incoherent light illumination, and can respond to incoherent light illumination, greatly increasing the design freedom of the hologram.

[0084] At the same time, the method for producing the light-responsive hologram of the present invention is simple, practical, feasible, easy to produce, and suitable for mass production.

[0085] Furthermore, the light-responsive hologram of the present invention has distinct features and lifelike dynamic images, which are very easy for ordinary people to recognize and remember. It is particularly suitable for display, security and anti-counterfeiting, virtual reality / augmented reality and other fields.

[0086] Furthermore, the light response form of the present invention is novel. Regardless of whether there is bright ambient light illumination, under the illumination of a specified incoherent light source, the hologram of the present invention can realize dynamic responses such as displaying and hiding of preset patterns, movement and scaling of patterns with the light source, etc., which is impossible for traditional holograms. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 A schematic flow chart of a method for producing a dynamic hologram according to the present invention;

[0088] Figure 2 and Figure 3 The first structure of the light-responsive dynamic hologram film of the present invention and a schematic diagram of its light response;

[0089] Figure 4 and Figure 5 The second structure of the light-responsive dynamic hologram film of the present invention and a schematic diagram of its light response;

[0090] Figure 6 and Figure 7 The third structure of the light-responsive dynamic hologram film of the present invention and a schematic diagram of its light response;

[0091] Figure 8 and Figure 9Schematic diagram of the fourth structure of the light-responsive dynamic hologram film of the present invention and its light response;

[0092] Figure 10 Schematic diagram of the fifth structure of the light-responsive dynamic hologram film of the present invention and its light response;

[0093] Figure 11 Schematic diagram of the sixth structure of the light-responsive dynamic hologram film of the present invention and its light response;

[0094] Figure 12 and Figure 13 Schematic diagram of the seventh structure of the light-responsive dynamic hologram film of the present invention and its light response;

[0095] Figure 14 and Figure 15 FIG8 is a schematic diagram of the eighth structure of the light-responsive dynamic hologram film of the present invention and its light response;

[0096] Figure 16 and Figure 17 Schematic diagram of the ninth structure of the light-responsive dynamic hologram film of the present invention and its light response;

[0097] Figure 18 A schematic diagram of the accurate Fourier transform hologram and its optical response of the present invention;

[0098] Figure 19 A schematic diagram of a positive defocused Fourier transform hologram and its optical response according to the present invention;

[0099] Figure 20 A schematic diagram of a negative defocused Fourier transform hologram and its optical response according to the present invention;

[0100] Figure 21 A schematic diagram of the fractional Fourier transform hologram and its optical response of the present invention;

[0101] Figure 22 A schematic diagram of a large-depth-of-field Fresnel hologram and its optical response according to the present invention;

[0102] Figure 23 This is an effect diagram of the auspicious cloud pattern displayed when a preset approximate point light source is turned on;

[0103] Figure 24 This is an effect diagram showing the auspicious cloud pattern of the present invention hidden when the preset approximate point light source is turned off;

[0104] Figure 25 、 Figure 26 、 Figure 27 This is an effect diagram of the auspicious cloud pattern of the present invention moving in the same direction as the preset light source moves;

[0105] Figure 28 A schematic diagram of the principle of the dynamic light response of the present invention. DETAILED DESCRIPTION

[0106] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0107] Rather, the present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention as defined by the claims. Furthermore, to facilitate a better understanding of the present invention, certain specific details are described in detail below in the detailed description of the present invention. Those skilled in the art will be able to fully understand the present invention without these details.

[0108] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used herein, the term "or / and" includes any and all combinations of one or more of the associated listed items.

[0109] like Figure 1 As shown, the first specific embodiment of the method for producing a dynamic hologram capable of light response of the present invention is as follows:

[0110] A method for producing a dynamic hologram capable of light response, comprising the following contents:

[0111] Obtain the preset patterns and dynamic effects that need to be displayed through the pre-built image acquisition model;

[0112] Use pre-built hologram simulation models to set up preset holograms based on preset patterns, dynamic effects, and lighting conditions;

[0113] A pre-built holographic fringe generation model is used to decompose a preset hologram into holographic units. The holographic fringes in the holographic units are determined based on the light field, dynamic effects, and illumination conditions of the preset pattern in the preset hologram, as well as the optical coupling relationship between the three, and are used to dynamically respond to external illumination.

[0114] Holographic stripes are generated according to a pre-built holographic dynamic display effect generation model and / or a holographic stripe physical output device to obtain a hologram that can be dynamically displayed, thereby realizing the production of a dynamic hologram that can respond to light.

[0115] The second specific embodiment of the method for producing a light-responsive dynamic hologram of the present invention:

[0116] A method for producing a dynamic hologram capable of light response, comprising the following contents:

[0117] Obtain the preset pattern to be displayed through a pre-built image acquisition model;

[0118] Using pre-built hologram simulation models, set up preset holograms based on preset patterns and lighting conditions;

[0119] Using a pre-built holographic fringe generation model, holographic fringes are obtained according to a preset hologram, which is used to dynamically respond to external light.

[0120] According to the pre-built holographic dynamic display effect generation model, based on the holographic stripes, a hologram that can be dynamically displayed is obtained, thereby realizing the production of a dynamic hologram that can respond to light.

[0121] The first specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0122] See also Figure 2 and Figure 3 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0123] The light-responsive dynamic hologram film HF in this embodiment consists of a substrate layer 1, an information layer 2, and a protective layer 3. These three layers are bonded together to form a film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a densely packed holographic element array 21, which is composed of holographic elements 211 arranged in a pattern. Each holographic element in the holographic element array records an accurate Fourier transform hologram of a pre-set single-depth planar pattern 6. This hologram is a reflective volume hologram.

[0124] The dynamic hologram film has the following light response characteristics. Figure 2 As shown, when the approximate point light source 5 is turned off, the dynamic hologram film HF is illuminated by the extended light source 4, and the human eye cannot see the flat pattern 6. Figure 3 As shown, when the approximate point light source 5 is turned on, the dynamic hologram film HF is illuminated by the extended light source 4, and the human eye can see a flat pattern 6 at a certain depth. The approximate point light source 5 is preferably an LED flashlight configured in a smartphone.

[0125] The second specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0126] See also Figure 4 and Figure 5 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0127] The light-responsive dynamic hologram film HF in this embodiment consists of a substrate layer 1, an information layer 2, and a protective layer 3. These three layers are bonded together to form a thin film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a tightly packed holographic element array 21, which is composed of holographic elements 1 211 arranged in a pattern. Each holographic element in the holographic element array records a positive defocused Fourier transform hologram of a planar pattern 1 61 and a planar pattern 2 62 at two predetermined depths. The hologram is a reflective volume hologram.

[0128] The dynamic hologram film has the following light response characteristics. Figure 4 and Figure 5 As shown, when the approximate point light source 5 is turned on, the human eye can see the plane pattern 1 61 and the plane pattern 2 62 at a preset depth of the dynamic hologram film HF under the illumination of the extended light source 4. Figure 4 As shown in FIG. 1 , when the approximate point light source 5 moves to the right at a speed V1 along a plane parallel to the plane where the hologram film is located, the plane pattern 1 61 and the plane pattern 2 62 move to the right at a speed V2. Figure 5 When the approximate point light source 5 moves to the left at a speed V3 along a plane parallel to the plane where the hologram film is located, the plane pattern 1 61 and the plane pattern 2 62 move to the left at a speed V3.

[0129] The third specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0130] See also Figure 6 and Figure 7 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0131] The light-responsive dynamic hologram film HF in this embodiment is composed of a substrate layer 1, an information layer 2, and a protective layer 3. The three layers are bonded together to form a thin film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a closely spaced holographic element array 21, which consists of a second holographic element 212 and a third holographic element 213. Holographic element 212 records a positively defocused Fourier transform hologram of a third planar pattern 63 at a preset depth, while holographic element 313 records a negatively defocused Fourier transform hologram of a fourth planar pattern 64 at a preset depth. These holograms are reflective volume holograms.

[0132] The dynamic hologram film has the following light response characteristics. Figure 6As shown, when the approximate point light source 5 is turned on, the human eye can see the plane pattern 3 63 and the plane pattern 4 64 at a preset depth under the illumination of the extended light source 4. The plane pattern 3 63 is suspended below the holographic film HF, and the plane pattern 4 64 is suspended above the holographic film HF. Figure 7 When the approximate point light source 5 rotates clockwise at a speed V5 around an axis perpendicular to the hologram film, the plane pattern three 63 rotates clockwise at a speed V7 around an axis perpendicular to the hologram film, and the plane pattern four 64 rotates counterclockwise at a speed V6 around an axis perpendicular to the hologram film.

[0133] The fourth specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0134] See also Figure 8 and Figure 9 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0135] The light-responsive dynamic hologram film HF in this embodiment is composed of a substrate layer 1, an information layer 2, and a protective layer 3. The three layers are bonded together to form a thin film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a tightly packed holographic element array 21, which consists of a fourth holographic element 214 and a fifth holographic element 215. Holographic element 214 records a positively defocused Fourier transform hologram of a planar pattern 66 at a preset depth, while holographic element 215 records a negatively defocused Fourier transform hologram of a planar pattern 76 at a preset depth. The holograms are reflective volume holograms.

[0136] The dynamic hologram film has the following light response characteristics. Figure 8 and 9 As shown, when the approximate point light source 5 is turned on, the human eye can see the plane pattern 66 and the plane pattern 67 at a preset depth under the illumination of the extended light source 4. The plane pattern 66 is suspended below the holographic film HF, and the plane pattern 67 is suspended above the holographic film HF. Figure 8 When the approximate point light source 5 moves downward at a speed V8 along an axis perpendicular to the hologram film, the plane pattern 66 moves upward at a speed V10 along an axis perpendicular to the hologram film, and the plane pattern 66 continues to shrink. The plane pattern 7 67 moves upward at a speed V9 along an axis perpendicular to the hologram film, and the plane pattern 7 67 continues to expand.

[0137] like Figure 9As shown, when the approximate point light source 5 moves upward along an axis perpendicular to the hologram film at a speed V8, the plane pattern 66 moves downward along an axis perpendicular to the hologram film at a speed V10, and the plane pattern 66 is continuously enlarged. The plane pattern 7 67 moves downward along an axis perpendicular to the hologram film at a speed V9, and the plane pattern 7 67 is continuously reduced.

[0138] The fifth specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0139] See also Figure 10 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0140] The light-responsive dynamic hologram film HF in this embodiment consists of a substrate layer 1, an information layer 2, and a protective layer 3. These three layers are bonded together to form a film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a densely packed holographic element array 21, comprised of holographic elements 216. Holographic elements 216 record a negatively defocused Fourier transform hologram of a planar pattern 868 at a predetermined depth. This hologram is a reflective volume hologram.

[0141] The dynamic hologram film has the following light response characteristics. Figure 10 As shown, when the approximate point light source 5 is turned on, the dynamic hologram film HF can be seen by the human eye as a plane pattern eight 68 at a preset depth under the illumination of the extended light source 4. The plane pattern eight 68 is suspended above the holographic film HF. Figure 10 As the approximate point light source 5 moves downward at a speed V8 along an axis perpendicular to the hologram film, the planar pattern 8 68 moves upward at a speed V11 along an axis perpendicular to the hologram film, and the planar pattern 8 68 continues to expand until it reaches infinity. At this point, the approximate point light source 5 continues to move downward at a speed V8 along an axis perpendicular to the hologram film, and the position of the planar pattern 8 68 shifts from above the hologram film to below it. As the approximate point light source 5 continues to move downward, the planar pattern 8 68 moves upward at a speed V12 along an axis perpendicular to the hologram film, and the pattern continues to shrink.

[0142] The sixth specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0143] See also Figure 11 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0144] The light-responsive dynamic hologram film HF in this embodiment is composed of a substrate layer 1, an information layer 2, and a protective layer 3. The three layers are bonded together to form a thin film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a densely packed holographic element array 21, which is comprised of holographic element seven 217. Holographic element seven 217 records a negatively defocused Fourier transform hologram of a multi-plane pattern at a predetermined depth. The multi-plane pattern is composed of plane pattern nine 69 and plane pattern ten 70. The hologram is a reflective volume hologram.

[0145] The dynamic hologram film has the following light response characteristics. Figure 11 As shown, when the approximate point light source 5 is turned on, the human eye can see the plane pattern 9 69 and the plane pattern 10 70 at a preset depth under the illumination of the extended light source 4. The plane pattern 9 69 is suspended below the holographic film HF, and the plane pattern 10 70 is suspended above the holographic film HF. Figure 11 When the approximate point light source 5 moves downward at a speed V8 along an axis perpendicular to the hologram film, the plane pattern 9 69 moves upward at a speed V14 along an axis perpendicular to the hologram film, and the plane pattern 9 69 continuously expands and contracts. The plane pattern 10 70 moves upward at a speed V13 along an axis perpendicular to the hologram film, and the plane pattern 10 70 continuously expands and contracts.

[0146] The seventh specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0147] See also Figure 12 and Figure 13 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0148] The light-responsive dynamic hologram film HF in this embodiment is composed of a substrate layer 1, an information layer 2, and a protective layer 3. The three layers are bonded together to form a thin film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a closely spaced holographic element array 21, which is composed of holographic element eight 218 and holographic element nine 219. Holographic element eight 218 records a large-depth-of-field Fresnel hologram of a three-dimensional model pattern eleven with continuous depth 71. Holographic element nine 219 records a fractional Fourier transform hologram of a three-dimensional model pattern twelve with continuous depth 72. The hologram is a reflective volume hologram.

[0149] The dynamic hologram film has the following light response characteristics. Figure 12As shown, when the approximate point light source 5 is turned off, the dynamic hologram film HF is illuminated by the extended light source 4, and the human eye cannot see the three-dimensional model pattern 11 71 and the three-dimensional model pattern 12 72. Figure 13 As shown, when the approximate point light source 5 is turned on, the dynamic hologram film is illuminated by the extended light source 4, and the human eye can see the three-dimensional model pattern 11 71 and the three-dimensional model pattern 12 72 at a specific depth. The approximate point light source 5 is preferably an LED flashlight configured in a smartphone.

[0150] The eighth specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0151] See also Figure 14 and Figure 15 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0152] The light-responsive dynamic hologram film HF in this embodiment is composed of a substrate layer 1, an information layer 2, and a protective layer 3. The three layers are bonded together to form a thin film. The information layer records holographic fringes that respond to external illumination. The information layer 2 is composed of a tightly packed holographic element array 21, which is comprised of holographic element nine 219 and holographic element ten 220. Holographic element nine 219 records a large depth-of-field Fresnel hologram of a three-dimensional model pattern twelve 72 with continuous depth. Holographic element ten 220 records a near-field Fresnel hologram of a three-dimensional model pattern thirteen 73 with continuous depth.

[0153] The dynamic hologram film has the following light response characteristics. Figure 14 As shown, when the parallel light source 8 is turned off, the dynamic hologram film HF is illuminated by the extended light source 4, and the human eye cannot see the three-dimensional model pattern 12 72 but can see the three-dimensional model pattern 13 73. Figure 15 As shown, when the parallel light source 8 is turned on, the dynamic hologram film is illuminated by the extended light source 4, and the human eye can simultaneously see the three-dimensional model pattern 12 72 and the three-dimensional model pattern 13 73 at a specific depth.

[0154] The ninth specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0155] See also Figure 16 and Figure 17 , is a structure of a light-responsive dynamic hologram film in this embodiment, and a schematic diagram of its light response.

[0156] The light-responsive dynamic hologram film HF in this embodiment is composed of a substrate layer 1, an information layer 2, and a protective layer 3. The three-layer structure is bonded to each other to form a film. The information layer records holographic stripes that can respond to external lighting. The information layer 2 is composed of a closely arranged holographic unit array 21, and the holographic unit array is composed of holographic units 221 and holographic units 222. The holographic unit 221 records a far-field Fresnel hologram of pattern 14 74 with a single depth. The holographic unit 222 records a far-field Fresnel hologram of pattern 15 75 with a single depth. The far-field Fresnel hologram of pattern 14 74 is a reflective volume hologram. The far-field Fresnel hologram of pattern 15 75 is a transmissive hologram.

[0157] The dynamic hologram film has the following light response characteristics. Figure 16 As shown, when the parallel light source 8 and the preset extended light source 9 are turned off, the dynamic hologram film HF is illuminated by the extended light source 4, and the human eye cannot see the pattern 14 74 and the pattern 15 75. Figure 17 As shown, when the parallel light source 8 and the preset extended light source 9 are turned on, the dynamic hologram film is illuminated by the extended light source 4, and human eyes can simultaneously see pattern fourteen 74 and pattern fifteen 75 at a specific depth.

[0158] The tenth specific embodiment of the light-responsive dynamic hologram film of the present invention:

[0159] A light-responsive dynamic hologram film comprises a substrate layer, an information layer, and a protective layer. The information layer is located between the substrate layer and the protective layer. The information layer records holographic fringes that are responsive to external illumination. The holographic fringes are preferably composed of a densely packed array of holographic elements. Each holographic element in the array records a far-field hologram of a preset pattern, or at least a portion of the preset pattern. The far-field hologram is composed of holographic fringes formed by the interference of the far-field diffracted light field of the preset pattern, or at least a portion of the preset pattern, with a predetermined reference light beam.

[0160] The far-field hologram includes an accurate Fourier transform hologram of a preset pattern, a defocused Fourier transform hologram, a fractional Fourier transform hologram, a large depth of field Fresnel hologram, etc.

[0161] The preset pattern includes a single plane pattern with discrete depths, a multi-plane pattern with discrete depths, and a three-dimensional model pattern with continuous depths.

[0162] The light-responsive dynamic hologram film has the following response characteristics:

[0163] The holographic film can produce dynamic holographic imaging effects in response to changes in external illumination light sources. The light source is preferably an incoherent light source, including an incoherent point light source, an approximate point light source, a parallel light source, a pre-set extended light source, and the like.

[0164] The response forms include:

[0165] (1) In a bright environment, the hologram displays a preset pattern that is visible to the human eye when the preferred illumination light source is turned on, and the preset pattern is invisible to the human eye when the preferred illumination light source is turned off.

[0166] (2) In a bright environment, when the preferred light source is turned on, the preset pattern can move along with the movement of the preferred light source. The movement forms include: when the preferred light source translates parallel to the hologram surface, the preset pattern translates in the same direction as the preferred light source. When the preferred light source rotates clockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates clockwise around the axis perpendicular to the hologram. When the preferred light source rotates counterclockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates counterclockwise along with the light source around the axis perpendicular to the hologram.

[0167] When the preferred light source translates along a surface parallel to the hologram, the predetermined pattern translates in the opposite direction relative to the preferred light source. When the preferred light source rotates clockwise about an axis perpendicular to the hologram in a plane parallel to the hologram, the predetermined pattern rotates counterclockwise about the axis perpendicular to the hologram. When the preferred light source rotates counterclockwise about an axis perpendicular to the hologram in a plane parallel to the hologram, the predetermined pattern rotates clockwise about the axis perpendicular to the hologram.

[0168] (3) When the preferred light source is turned on, the preset pattern can be scaled as the preferred light source moves. The scaling includes: when the preferred light source moves upward perpendicular to the hologram surface, the preset pattern is enlarged; when the preferred light source moves downward perpendicular to the hologram surface, the preset pattern is reduced.

[0169] The zooming form also includes: when the preferred light source moves upward perpendicular to the hologram surface, the preset pattern is reduced; when the preferred light source moves downward perpendicular to the hologram surface, the preset pattern is enlarged.

[0170] The zooming form also includes: when the preferred light source moves upward perpendicular to the hologram surface, the preset pattern is first reduced and then enlarged; when the preferred light source moves downward perpendicular to the hologram surface, the preset pattern is first enlarged and then reduced.

[0171] The zooming form also includes: when the preferred light source moves upward perpendicular to the hologram surface, the preset pattern is first enlarged and then reduced; when the preferred light source moves downward perpendicular to the hologram surface, the preset pattern is first reduced and then enlarged.

[0172] The hologram is preferably a reflective volume hologram or a transmissive plane hologram.

[0173] Embodiments of the hologram of the present invention:

[0174] See also Figures 18-22 , which are a reflective accurate Fourier transform hologram, a defocused Fourier transform hologram, a transmissive fractional Fourier transform hologram and a large depth of field Fresnel hologram in this embodiment.

[0175] like Figure 18 As shown, the accurate Fourier transform hologram is located on the back focal plane of the Fourier transform lens, and the preset pattern is located on the front focal plane of the Fourier transform lens. The accurate Fourier transform hologram is formed by the interference of the light field on the back focal plane and the reference light incident from the opposite side.

[0176] like Figure 19 As shown, the positive defocused Fourier transform hologram is located on the output surface of the Fourier transform lens beyond one focal length, and the preset pattern is located on the front focal plane of the Fourier transform lens. The positive defocused Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident from the opposite side.

[0177] like Figure 20 As shown, the negative defocused Fourier transform hologram is located on the output surface between the Fourier transform lens and its rear focal plane, and the preset pattern is located on the front focal plane of the Fourier transform lens. The positive defocused Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident from the opposite side.

[0178] like Figure 21 As shown, the fractional Fourier transform hologram is located on the output surface between the Fourier transform lens and its rear focal plane, and the preset pattern is located on the input surface between the Fourier transform lens and its front focal plane. The fractional Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident on the same side.

[0179] like Figure 22 As shown, the large depth of field Fresnel hologram is located on the output surface, the preset pattern is located on the input surface, and the hologram is composed of a distance hologram. Figure 1 The light field on the input surface at a certain distance is formed by the interference of the light field formed by Fresnel diffraction and the reference light incident on the same side. The distance between the input surface and the output surface is greater than the depth of field of the hologram under ordinary diffuse light or extended light source illumination conditions.

[0180] like Figure 23 、 Figure 24 、 Figure 25 、 Figure 26 、 Figure 27 、 Figure 28 As shown, a specific embodiment of the dynamic hologram production method, dynamic hologram and light response of the present invention is applied:

[0181] In this embodiment, the preset pattern to be displayed is auspicious clouds obtained through a pre-built image acquisition model, and the dynamic effect is: the auspicious cloud pattern is displayed as the preset light source is turned on, and is hidden as the preset light source is turned off; the pattern moves in the same direction as the preset light source.

[0182] like Figure 23 When the preset approximate point light source is turned on, the auspicious cloud pattern is displayed; Figure 24 When the preset approximate point light source is turned off, the auspicious cloud pattern is hidden; Figure 25 、 Figure 26 、 Figure 27 The auspicious cloud pattern moves in the same direction as the preset light source.

[0183] To achieve the above dynamic hologram, you need to continue to perform the following steps:

[0184] A preset hologram is set based on the preset pattern 60 , dynamic effects and light source 50 using a pre-built hologram simulation model.

[0185] A pre-built holographic fringe generation model is used to decompose the preset hologram into holographic units 211. The holographic fringes in the holographic units are determined based on the light field, dynamic effect, light source 50 and the optical coupling relationship of the preset pattern 60 in the preset hologram, and are used to dynamically respond to external light.

[0186] The positive defocused Fourier transformed light field of the preset pattern 60 is recorded in the holographic unit 211; the positive defocused Fourier transformed light field of the same preset pattern 60 is recorded in each holographic unit in the hologram; the wave vector of the light source at the holographic unit 211 is the same as the wave vector of the reference light at the unit position.

[0187] The optical coupling relationship includes: a dynamic moiré imaging relationship between the array formed by the light source 50, the holographic unit 211, and the array formed by the preset pattern 60; a holographic coupled wave imaging relationship between the incoherent light source and the holographic unit 211; and a far-field diffraction array imaging relationship between the holographic unit 211 and the preset pattern 60.

[0188] Holographic stripes are generated according to a pre-built holographic dynamic display effect generation model and / or a holographic stripe physical output device to obtain a hologram that can be dynamically displayed, thereby realizing the production of a dynamic hologram that can respond to light.

[0189] The holographic fringes are generated by a holographic printing output device; specifically, the holographic fringes in the holographic unit 211 are formed by interference exposure one by one with the positive defocused Fourier transform light field of the preset pattern 60 and the reference light having the same wave vector as the illumination light at the holographic unit 211 .

[0190] Therefore, this embodiment can verify that the present invention can be applied to obtain a hologram that can be dynamically displayed and achieve dynamic light response.

[0191] An embodiment of a device applying the method of the present invention:

[0192] An electronic device comprising:

[0193] one or more processors;

[0194] a storage device for storing one or more programs;

[0195] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned method for producing a dynamic hologram capable of light response.

[0196] A computer medium embodiment of the method of the present invention:

[0197] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned method for producing a dynamic hologram capable of light response.

[0198] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, and computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0199] The present application is described in terms of flowcharts or / and block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process or / and block in the flowchart or / and block diagram and the combination of the processes or / and blocks in the flowchart or / and block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0200] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0201] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0202] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field can still modify or replace the specific implementation methods of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A method for producing a dynamic hologram capable of light response, characterized in that: Includes the following: Obtain the preset patterns and dynamic effects that need to be displayed through the pre-built image acquisition model; Use pre-built hologram simulation models to set up preset holograms based on preset patterns, dynamic effects, and lighting conditions; A pre-built holographic fringe generation model is used to decompose a preset hologram into holographic units. The holographic fringes in the holographic units are determined based on the light field, dynamic effects, and illumination conditions of the preset pattern in the preset hologram, as well as the optical coupling relationship between the three, and are used to dynamically respond to external illumination. Holographic stripes are generated according to a pre-built holographic dynamic display effect generation model and / or a holographic stripe physical output device to obtain a hologram that can be dynamically displayed, thereby realizing the production of a dynamic hologram that can respond to light.

2. The method for producing a light-responsive dynamic hologram according to claim 1, wherein: The preset pattern is a single plane pattern with a certain depth, or / and multiple plane patterns, or a multi-plane single pattern with discrete depths, or / and multiple patterns, or a three-dimensional model pattern with continuous depth, and its shape is a geometric pattern, or / and a text pattern, or / and a plant pattern, or / and an animal pattern, or / and a human pattern, or / and a landscape pattern, or / and an object pattern, or / and a natural phenomenon pattern, or / and a virtual digital pattern; The dynamic effects include: translation, rotation, scaling of a single pattern, or / and relative translation, rotation, scaling of multiple patterns.

3. The method for producing a light-responsive dynamic hologram according to claim 1, wherein: Using pre-built hologram simulation models, here's how to set up a preset hologram based on preset patterns, dynamic effects, and lighting conditions: Acquiring characteristic information of an incoherent lighting source; the incoherent lighting source includes an incoherent point light source, an approximate point light source, a parallel light source, or a pre-set extended light source; Generate lighting conditions based on the characteristic information of the incoherent light source; Setting preset holograms based on lighting conditions, dynamic effects, and preset patterns, and according to hologram transformation algorithms; The hologram transformation algorithm is an accurate Fourier transform hologram algorithm, a defocused Fourier transform hologram algorithm, a fractional Fourier transform hologram algorithm or a large depth of field Fresnel hologram algorithm.

4. The method for producing a light-responsive dynamic hologram according to claim 1, wherein: Using the pre-built holographic fringe generation model and the preset hologram, the method for obtaining holographic fringes is as follows: According to the preset hologram, several holographic units are set; Arrange several holographic units closely to obtain a holographic unit array; The holographic fringes in the holographic unit are determined based on the light field of the preset pattern in the preset hologram, the dynamic effect, the illumination conditions and the optical coupling relationship between the three, and are used to dynamically respond to external illumination; The optical coupling relationship includes: a dynamic moiré imaging relationship between the incoherent light source, the holographic unit and the preset pattern; a holographic coupled wave imaging relationship between the incoherent light source and the holographic unit; and a far-field diffraction array imaging relationship between the holographic unit and the preset pattern.

5. The method for producing a light-responsive dynamic hologram according to claim 1, wherein: The method for generating holographic stripes based on the pre-built holographic dynamic display effect generation model and the holographic stripe physical output device to obtain a hologram that can be dynamically displayed is as follows: A hologram is formed by interfering the far-field diffracted light field of the holographic fringes, the preset pattern and its dynamic effect, with the reference light field corresponding to the set illumination conditions; the hologram is decomposed into holographic units, and all holographic units are physically outputted using the holographic fringes to obtain a dynamic hologram film object with light response; The hologram is an accurate Fourier transform hologram including a preset pattern, a defocused Fourier transform hologram, a fractional Fourier transform hologram, or a large depth of field Fresnel hologram.

6. The method for producing a light-responsive dynamic hologram according to claim 5, wherein: The method to obtain an accurate Fourier transform hologram is as follows: The preset pattern is located on the front focal plane of the Fourier transform lens, and the accurate Fourier transform hologram is formed by the interference of the light field on the back focal plane and the reference light incident from the opposite side or the same side, which is located on the back focal plane of the Fourier transform lens; Or / and, the method for obtaining a positive defocused Fourier transform hologram is as follows: The preset pattern is located on the front focal plane of the Fourier transform lens, and the positive defocused Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident on the opposite side or the same side. The hologram is located on the output surface beyond one focal length of the Fourier transform lens; Or / and, the method of obtaining a negative defocus Fourier transform hologram is as follows: The preset pattern is located on the front focal plane of the Fourier transform lens, and the positive defocused Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident on the opposite side or the same side. The hologram is located on the output surface between the Fourier transform lens and the rear focal plane thereof; Or / and, the method to obtain the fractional Fourier transform hologram is as follows: The preset pattern is located on the input surface between the Fourier transform lens and its front focal plane, and the fractional Fourier transform hologram is formed by the interference of the light field on the output surface and the reference light incident on the opposite side or the same side. The hologram is located on the output surface between the Fourier transform lens and its rear focal plane; Alternatively or in combination, the method for obtaining a Fresnel hologram with a large depth of field is as follows: The preset pattern is located on the input surface. The large depth of field Fresnel hologram is formed by the interference of the light field formed by Fresnel diffraction on the input surface at a certain distance from the hologram and the reference light incident from the opposite side or the same side. The hologram is located on the output surface. The distance between the input surface and the output surface is greater than the depth of field of the large-depth-of-field Fresnel hologram under ordinary diffuse light or extended light source illumination conditions.

7. A light-responsive dynamic hologram film, characterized in that: Including substrate layer, information layer and protective layer; The information layer is located between the substrate layer and the protective layer; the information layer is provided with holographic stripes that can respond to external illumination; the holographic stripes include a closely arranged array of holographic units; Each holographic unit in the holographic unit array is provided with a far-field hologram capable of forming a preset pattern or at least a part of the preset pattern; The far-field hologram is composed of holographic fringes formed by the interference of the far-field diffraction light field of the preset pattern or at least part of the preset pattern with the set reference light field, and is used to respond to changes in the external illumination light source and produce a dynamic holographic imaging effect.

8. The light-responsive dynamic hologram film according to claim 7, wherein: The far-field hologram includes an accurate Fourier transform hologram of a preset pattern or / and a defocused Fourier transform hologram or / and a fractional Fourier transform hologram or / and a Fresnel hologram with a large depth of field; The preset pattern includes a single plane single pattern with a certain depth or / and multiple patterns or / and a multi-plane single pattern with discrete depths or / and multiple patterns or / and a three-dimensional model pattern with continuous depth; The light source is an incoherent light source, including an incoherent point light source and / or an approximate point light source and / or a parallel light source and / or a preset extended light source.

9. A light response method based on a dynamic hologram film, characterized in that: The light-responsive dynamic hologram film according to any one of claims 7 to 8 is applied, comprising the following contents: In a bright environment, when the set light source is turned on, the hologram displays a preset pattern that is visible to the human eye, and when the set light source is turned off, the preset pattern is invisible to the human eye; In a bright environment, when the set light source is turned on, the preset pattern can move as the set light source moves; Under the condition that the set light source is turned on, the preset pattern can be scaled along with the movement of the set light source.

10. The optical response method based on a dynamic hologram film according to claim 9, characterized in that: The mobile form includes the following: When the light source is set to translate parallel to the hologram surface, the preset pattern translates in the same direction as the light source; when the light source is set to rotate clockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates clockwise around the axis perpendicular to the hologram; when the light source is set to rotate counterclockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates counterclockwise around the axis perpendicular to the hologram along with the light source; Or, when the light source is set to translate along a surface parallel to the hologram, the preset pattern translates in the opposite direction relative to the light source; When the light source is set to rotate clockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates counterclockwise around the axis perpendicular to the hologram; when the light source is set to rotate counterclockwise around an axis perpendicular to the hologram on a plane parallel to the hologram, the preset pattern rotates clockwise around the axis perpendicular to the hologram; Or / and, the scaling form includes the following: When the light source is set to move upward perpendicular to the hologram surface, the preset pattern is enlarged, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is reduced; or, when the light source is set to move upward perpendicular to the hologram surface, the preset pattern is reduced, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is enlarged; or, when the light source is set to move upward perpendicular to the hologram surface, the preset pattern is first reduced and then enlarged, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is first enlarged and then reduced; or, when the light source is set to move upward perpendicular to the hologram surface, the preset pattern is first enlarged and then reduced, and when the light source is set to move downward perpendicular to the hologram surface, the preset pattern is first reduced and then enlarged; Or / and, the hologram is a reflective volume hologram or a transmissive plane hologram.

Images