WO2015147283A1 - 表示体、および、表示体の観察方法 - Google Patents
表示体、および、表示体の観察方法 Download PDFInfo
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- WO2015147283A1 WO2015147283A1 PCT/JP2015/059688 JP2015059688W WO2015147283A1 WO 2015147283 A1 WO2015147283 A1 WO 2015147283A1 JP 2015059688 W JP2015059688 W JP 2015059688W WO 2015147283 A1 WO2015147283 A1 WO 2015147283A1
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- WIPO (PCT)
- Prior art keywords
- display
- display unit
- information
- metal layer
- display body
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/23—Identity cards
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/351—Translucent or partly translucent parts, e.g. windows
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/373—Metallic materials
Definitions
- the technology of the present disclosure relates to a display body using surface plasmons and a display body observation method.
- Products such as securities, certificates, branded products, high-priced products, electronic devices, and personal authentication media should be difficult to counterfeit in order to protect the value and information of the products from others. . Therefore, a display body that is difficult to counterfeit may be attached to such articles.
- a display body that is difficult to counterfeit As a display body that is difficult to counterfeit, a display body that displays image information using a plurality of cells formed by a diffraction grating is known. In such a display body, there is also a display body having a micro image corresponding to a binary or higher bitmap pattern in a specific cell among a plurality of cells, which can be observed using a microscope.
- a display body having a micro image corresponding to a binary or higher bitmap pattern in a specific cell among a plurality of cells which can be observed using a microscope.
- a minute image corresponding to a bitmap pattern of two or more values is displayed by two or more height differences. For this reason, for example, when dust or dirt having the same size as the height difference constituting the minute image overlaps with a part of the minute image, the observer of the display body removes dust or dirt as a part of the minute image. There is a possibility of misrecognizing as
- the technology of the present disclosure is intended to provide a display body that can suppress erroneous recognition of information by an observer, and a display body observation method.
- One aspect of the display body in the technology of the present disclosure includes a first display unit that displays first information, and a second display unit that displays second information having a display size larger than the first information.
- the second display unit includes the entire first display unit as a part of the second display unit, and the first display unit includes a plasmon structure.
- the plasmon structure includes an interface between a metal layer and a dielectric layer that transmits light, excites surface plasmons at the interface, and irradiates the irradiation light irradiated on the interface with transmitted light having a color different from that of the irradiation light. Instead, the first information is displayed by the transmitted light.
- the display body includes a first display unit that displays the first information, and a second display that displays the second information having a display size larger than the first information.
- the second display unit includes the entire first display unit as a part of the second display unit, and the first display unit includes a plasmon structure.
- the plasmon structure includes an interface between a metal layer and a dielectric layer that transmits light, excites surface plasmons at the interface, and irradiates the irradiation light irradiated on the interface with transmitted light having a color different from that of the irradiation light. Instead, the first information is displayed by the transmitted light. And the process which irradiates the said irradiation light to the said interface of the said display body, and the process of expanding and observing the said display body currently irradiated with the said irradiation light is provided.
- the first display section included in the second display section displays the first information by transmitted light having a predetermined color.
- the first information can be grasped by the difference between the light having the predetermined color and the other portions. Therefore, the difference between the portion that is the first information and the other portion is easily recognized. As a result, it is possible to suppress the viewer from misrecognizing information.
- (A) It is a figure which shows schematic structure of the display body in one embodiment which actualized the display body of this indication
- (b) It is the elements on larger scale which expand and show a part of display body. It is a figure which expands and shows the micro display part with which a display body is provided. It is a fragmentary sectional view which shows the partial cross section structure of a micro display part. It is a fragmentary perspective view which shows the partial perspective structure of the dielectric material layer with which a micro display part is provided. It is a top view which shows the structure which looked at the dielectric material layer from the top. It is a flowchart for demonstrating the observation method of a display body. It is a figure which shows typically the effect
- FIG. 1B is an enlarged view of a portion surrounded by a circle indicated by a one-dot chain line in FIG.
- the display body 10 includes a base material 11, a display unit 12 positioned on one surface of the base material 11, and a plurality of minute display units positioned on one surface of the base material 11. And.
- the substrate 11 has, for example, a rectangular plate shape.
- the substrate 11 is not limited to the rectangular plate shape, and may have a circular plate shape or a rectangular parallelepiped shape as long as the display unit 12 has an area where the display unit 12 can be positioned. It may have other shapes.
- the display unit 12 is an example of a second display unit, and displays second information that is predetermined information.
- the information displayed on the display unit 12 is, for example, an image.
- a shape in which two adjacent circles are connected to each other is an example of an image.
- the image as information displayed on the display unit 12 is not limited to a graphic such as a pattern or a pattern, and may be a character, a symbol, or a number. At least two of a graphic, a character, a symbol, and a number are acceptable. It may be a combination.
- the information displayed on the display unit 12 is not limited to an image, and may be color information such as a ratio of a specific color in the entire display unit 12, a color arrangement of the display unit 12, and the presence or absence of a color.
- Position information such as a position where a specific color is arranged or a position where a color is given on the display unit 12 may be used.
- the display unit 12 includes each of the micro display units 13 as a part of the display unit 12. That is, the display unit 12 is larger than each micro display unit 13 and has a size capable of including a plurality of micro display units 13 as a part.
- the display unit 12 may be, for example, a part that displays information using light diffraction by a diffraction grating structure, and a metal layer formed on the surface of the base material 11 has a predetermined shape by, for example, an etching method or the like. It may be a portion that displays information using reflection or diffusion of light in the metal layer.
- Each of the micro display units 13 is an example of a first display unit.
- the micro display unit 13 excites surface plasmons, and the irradiation light irradiated on the micro display unit 13 is transmitted light having a color different from the irradiation light. It has a plasmon structure that turns into a plasmon.
- a plurality of minute display units 13 are located inside the display unit 12. Note that the display body 10 may include only one minute display unit 13 instead of the plurality of minute display units 13.
- Each of the micro display units 13 displays first information which is predetermined information and smaller in display size than the second information displayed on the display unit 12 by the above-described transmitted light. That is, the display size of the second information displayed on the display unit 12 is larger than the display size of the first information displayed on the micro display unit 13, and the size of the display unit 12 is the same as the display size of the second information. For example, when the display unit 12 displays a three-dimensional image, it may be larger or smaller than the display size of the second information.
- the size of the minute display unit 13 may also be the same as the display size of the first information, or may be larger or smaller than the display size of the first information.
- the first information is, for example, a predetermined character string which is an example of an image, and the character string in which the Roman letter O and the Roman letter K shown in FIG. 1B are an example of the first information.
- the first information displayed by the minute display unit 13 may be an image, color information, or position information, like the second information described above.
- each micro display unit 13 the entire micro display unit 13 is included as a part of the display unit 12. That is, the minute display unit 13 is smaller than the display unit 12 and has a size that can be included in the display unit 12.
- the plurality of minute display portions 13 may be regularly arranged inside the display portion 12 or may be irregularly arranged.
- the micro display unit 13 is composed of a plurality of display elements 21 arranged in a matrix.
- Each of the display elements 21 is an area having a rectangular shape partitioned inside the display unit 12, for example.
- the display element 21 is not limited to a rectangular shape, and may be a region having a polygonal shape other than a rectangle such as a triangular shape or a pentagonal shape.
- the first information displayed by the minute display unit 13 is composed of a plurality of information elements, and the minute display unit 13 is composed of display elements 21 for each information element.
- the length L1 of one side in each display element 21 is, for example, not less than 200 nm and not more than 3000 nm.
- the size of each display element 21 is difficult to visually recognize the minute display portion 13 and the minute display portion. 13 can be observed at a magnification that can be set with an optical microscope.
- the plurality of display elements 21 are arranged, for example, along the row direction R, which is one direction, and along the column direction C orthogonal to the row direction R.
- the number of display elements 21 arranged in the row direction R is, for example, 10 or more and 100 or less
- the number of display elements 21 arranged in the column direction C is, for example, 10 or more and 100 or less.
- one minute display unit 13 is configured by 100 or more and 10,000 or less display elements 21.
- the size of the micro display unit 13 is a preferable size because it is difficult to visually recognize and can be observed at a magnification that can be set with an optical microscope.
- the first information displayed by each minute display unit 13 includes a first information element that expresses a first color, and a second information element that expresses a second color that is different from the first color. Is included in multiple information elements.
- the display element 21 constituting the minute display unit 13 includes a first display element 22 corresponding to the first information element expressing the first color and a second display corresponding to the second information element expressing the second color. And an element 23.
- the plasmon structure included in the first display element 22 and the plasmon structure included in the second display element 23 transmit light of different colors.
- the plurality of first display elements 22 display O in Roman letters
- the second display element 23 displays K in Roman letters.
- the micro display unit 13 displays a Roman letter O having a red color as part of the first information.
- the micro display part 13 uses the Roman letter K which has blue as a part of 1st information. indicate.
- Each minute display unit 13 further includes a part between the first display element 22 and the second display element 23, a part surrounded by the first display element 22, or a part including a part surrounded by the second display element 23.
- the surrounding element 24 is provided.
- Each of the plurality of surrounding elements 24 may be a part that transmits the irradiation light applied to the micro display unit 13 without changing the color of the irradiation light, or may be a part that does not transmit the irradiation light.
- the first display element 22 and the second display element 23 may be a part that transmits light of different colors.
- Each micro display unit 13 may not include the surrounding element 24.
- Display element configuration The detailed configuration of the display element 21 will be described with reference to FIGS. Below, the display element 21 containing a plasmon structure like the 1st display element 22 and the 2nd display element 23 among the display elements 21 is demonstrated.
- the display element 21 includes a metal layer 31, a dielectric layer 32 that transmits light, and a plasmon structure including an interface 33 between the metal layer 31 and the dielectric layer 32.
- the plasmon structure included in the display element 21 excites surface plasmons at the interface 33 by irradiation light applied to the interface between the dielectric layer 32 and the metal layer 31, and converts the irradiation light into light of a color different from the irradiation light. Change.
- the dielectric layer 32 includes, for example, a base 41 having a base surface 41a that is one surface, and the base 41 has a plurality of convex portions 42 protruding from the base surface 41a.
- the base surface 41a is a formation surface on which the convex portions 42 are formed.
- the dielectric layer 32 may have a multilayer structure including layers other than the base body 41.
- the surface away from the base surface 41a is the top surface 42a, and the surface including the top surface 42a in all the convex parts 42 is the virtual plane 42b.
- the base surface 41a of the base body 41 and the virtual plane 42b are substantially parallel to each other.
- the distance D between the base surface 41a and the virtual plane 42b is preferably, for example, 30 nm or more and 500 nm or less.
- the plasmon structure included in the display element 21 only needs to include at least one interface 33 between the metal layer 31 and the dielectric layer 32. Thereby, the plasmon structure can excite surface plasmons at the interface 33 by the irradiation light irradiated to the interface 33 and change the irradiation light into transmitted light having a color different from the irradiation light.
- the plasmon structure included in one display element 21 has two or more protrusions 42 and at least the tops of the protrusions 42 when one display element 21 transmits transmitted light having a predetermined color.
- a configuration including a metal layer 31 covering the surface 42a is preferable.
- Each convex portion 42 has, for example, a rectangular column shape, but may have a polygonal column shape other than a rectangular column shape such as a triangular column shape or a pentagonal column shape, or a cylindrical shape or an elliptic column shape. Alternatively, it may have a cone shape such as a cone shape or a polygonal cone shape. In addition, when each convex part 42 has a polygonal column shape, each of the corner
- each convex portion 42 is a step surface including a surface substantially parallel to the virtual plane 42b, and the convex portion 42 extends in a cross section along the direction of the thickness T of the metal layer 31 in each convex portion 42.
- a shape in which the width in the direction orthogonal to the direction becomes larger for each step from the top surface 42a toward the base surface 41a may be used.
- the metal layer 31 may be positioned on each of the surfaces substantially parallel to the virtual plane 42b on the side surface.
- the material for forming the dielectric layer 32 is, for example, quartz.
- the material for forming the dielectric layer 32 may be an inorganic material that transmits visible light other than quartz, such as titanium oxide or magnesium fluoride, or an organic material that transmits visible light, such as various resins. .
- the dielectric layer 32 including the base body 41 and the plurality of convex portions 42 of the base body 41 is chemically formed on a base material formed of each material, for example. It is formed by performing an etching process or a physical etching process.
- the material for forming the dielectric layer 32 is resin
- the dielectric layer 32 including the base 41 and the plurality of convex portions 42 of the base 41 is transferred, for example, to a layer formed from resin. Formed by.
- the dielectric layer 32 constitutes a part of the base material 11 in the display body 10.
- the whole base material 11 may be formed with the same formation material as the dielectric layer 32, and the base material 11 is formed with the formation material different from the dielectric layer 32 and the dielectric layer 32. May be included.
- the metal layer 31 is formed on, for example, the entire portion of the base surface 41 a where the convex portions 42 are not formed and the top surface 42 a of each convex portion 42.
- the metal layer 31 may be formed on a part of the base surface 41a, may be formed on a part of each top surface 42a, may be formed only on the base surface 41a, or may be formed on the top surface. It may be formed only on 42a.
- the interface 33 between the dielectric layer 32 and the metal layer 31 is formed.
- the thickness T of the metal layer 31 is, for example, 20 nm to 100 nm, and preferably 40 nm to 60 nm.
- the material for forming the metal layer 31 is, for example, aluminum.
- the forming material of the metal layer 31 may be gold, silver, titanium nitride, or the like, and in the forming material, it is preferable that the real part of the complex dielectric constant in the visible light region is a negative value.
- the forming material of the metal layer 31 has such characteristics, the light transmitted by the excitation of the surface plasmon is surely included in the visible light region. Therefore, the observer can surely recognize the information displayed on the display body 10.
- the metal layer 31 is formed by physical vapor deposition such as vacuum vapor deposition or sputtering.
- a vacuum deposition method When the metal layer 31 is formed by a vacuum deposition method, a minute uneven structure is formed on the surface of the metal layer 31.
- the minute concavo-convex structure formed by the vacuum deposition method has a size that does not affect the state of the surface plasmon formed at the interface 33 between the metal layer 31 and the dielectric layer 32. Therefore, the metal layer 31 may have a concavo-convex structure to the extent that it is formed by a vacuum deposition method, that is, a surface roughness.
- the plurality of convex portions 42 are arranged along the Y direction which is a direction orthogonal to the X direction and arranged at equal intervals G along the X direction which is one direction. They are lined up at intervals G. That is, the plurality of convex portions 42 are regularly arranged in a tetragonal lattice pattern on the base surface 41 a of the base body 41. Note that FIG. 3 described above shows a cross-sectional structure taken along line 3-3 of FIG.
- an interval G between the convex portions 42 adjacent to each other in the X direction and an interval G between the convex portions adjacent to each other in the Y direction are mutually different. be equivalent to.
- the length L2 of one side of each convex portion 42 is equal to the gap G, for example, and the sum of the gap G and the length L2 is the same.
- the period P it is preferable that the period P is 100 nm or more and 600 nm or less, for example.
- the period P is a distance between the centers of the convex portions 42 in the convex portions 42 adjacent to each other in a plan view facing the base surface 41a, that is, a distance between the centers.
- the distance between the convex portions 42 adjacent to each other in the direction crossing the X direction is larger than the period P. Therefore, in the plurality of convex portions 42 arranged in a tetragonal lattice shape, the distance between the convex portions 42 adjacent to each other is a period P and the distance between the convex portions 42 adjacent to each other is longer than the period P. Big part included.
- the surface plasmon states formed at the interface 33 in the portion where the distance between the two convex portions 42 is greater than the period P are different from each other.
- the fill factor which is the ratio of the length L2 of one side of the convex portion 42 to the period P, changes, so that the plasmon structure The color of light transmitted through the body changes.
- each minute display unit 13 includes the first display element 22 and the second display element 23, and each of the first display element 22 and the second display element 23 includes the metal layer 31 and the dielectric layer. And a plasmon structure that transmits light having a color different from the irradiation light by surface plasmons excited by the interface 33.
- the color of light transmitted through each first display element 22 and each second display element 23 is determined by the state of the surface plasmon formed in the plasmon structure. And, between the two interfaces 33, at least one of the following conditions is different from each other, whereby the states of the surface plasmons formed at the two interfaces 33 are different from each other. That is, between the two interfaces 33, the period P in the dielectric layer 32, the distance D between the base surface 41a of the dielectric layer 32 and the virtual plane 42b, the arrangement state of the plurality of convex portions 42 on the base surface 41a, Since the thickness T of the metal layer 31 and at least one of the forming materials of the metal layer 31 are different, the surface plasmon states are different between the two interfaces 33.
- At least one of the above-described conditions differs between the plasmon structure included in the first display element 22 and the plasmon structure included in the second display element 23.
- the state of the surface plasmon excited between the first display element 22 and the second display element 23 is different, and as a result, the color of the light transmitted through the first display element 22 and the second display element 23 are different.
- the colors of the light transmitted through are different from each other.
- each micro display unit 13 displays the first information by light having a predetermined color generated by excitation of the surface plasmon. Therefore, since the micro display unit 13 included in the display unit 12 displays the first information with transmitted light having a predetermined color, the observer of the display body 10 can use the light having the predetermined color and the other light. The first information can be grasped by the difference from the portion. Therefore, the difference between the portion that is the first information and the other portion is easily recognized. As a result, it is possible to suppress the viewer from misrecognizing information.
- the display body 10 can display more complicated information compared with the structure which the 1st display element 22 and the 2nd display element 23 permeate
- the observation method of the display body 10 includes an irradiation step (step S11) and an observation step (S12).
- irradiation step irradiation light is irradiated to the interface between the dielectric layer 32 and the metal layer 31 included in the micro display unit 13 in the display body 10.
- the display body 10 irradiated with the irradiation light is enlarged and observed.
- the display body 10 may be observed by human eyes, or may be performed by a device that can detect the transmitted light of the display body 10.
- the display body 10 described above is attached to the authentication target body 50.
- subjected to the to-be-authenticated body 50 is observed, the display body 10 is irradiated with light toward the metal layer 31 from the dielectric material layer 32 which the display body 10 has, for example. Thereby, the interface 33 between the dielectric layer 32 and the metal layer 31 is irradiated with light.
- the authentication target 50 is a base material or the like capable of causing light to reach the display body 10 through the authentication target 50.
- the display body 10 may be attached in a state where light is directly irradiated when attached to the authentication target 50.
- the display body 10 is irradiated with light from the metal layer 31 of the display body 10 toward the dielectric layer 32, so that the interface 33 between the dielectric layer 32 and the metal layer 31 is irradiated with light. Also good. Even in this case, the same effect as when light is irradiated from the dielectric layer 32 toward the metal layer 31 can be obtained.
- the surface where the metal layer 31 in each display element 21 is exposed is the surface, and in the display body 10, the surface opposite to the surface where the metal layer 31 of each display element 21 is exposed. And the surface where the dielectric layer 32 is exposed is the back surface.
- the light source LS that emits white light as the irradiation light IL irradiates the irradiation light IL on the back surface of the display body 10.
- the observer OB can observe only the second information displayed on the display unit 12 among the information displayed on the display body 10. it can.
- the observer OB displays the first information displayed on the micro display unit 13 among the information displayed on the display body 10. It can be observed as transmitted light TL having a color different from that of the irradiation light IL.
- the display body 10 can provide different information to the observer OB at each of the two stages in the magnification for enlarging the display body 10. Therefore, the observer OB determines, for example, whether the display 10 has the minute display unit 13 or whether the image, color information, or position information displayed on the minute display unit 13 is correct. Thus, the authenticity of the authentication target 50 can be determined.
- the effects listed below can be obtained.
- the micro display unit 13 displays the first information by transmitted light having a predetermined color
- the observer OB of the display body 10 is different from the light having the predetermined color and the other portions.
- the first information can be grasped. Therefore, the difference between the portion that is the first information and the other portion is easily recognized. As a result, the observer OB can be prevented from erroneously recognizing information.
- the display body 10 Since the display element 21 that transmits the transmitted light TL having different colors is included in the plurality of display elements 21, the display body 10 displays more than one color. Differences between elements are easily transmitted to the observer OB of the display body 10.
- Each of the number of display elements 21 arranged in the row direction R and the number of display elements 21 arranged in the column direction C is 10 or more and 100 or less. Therefore, the first information has a size that is almost impossible to visually recognize, and is a size that can be visually recognized by being enlarged by an optical microscope.
- the metal layer 31 includes a base surface metal layer 61 located on the base surface 41a and a top surface metal layer 62 located on the top surface 42a, and the thickness of the base surface metal layer 61 is The base surface thickness is T1, and the thickness of the top metal layer 62 is the top surface thickness T2.
- the metal layer 31 is formed by the physical vapor deposition method described above, for example, the vacuum vapor deposition method, the particles constituting the metal layer 31 are likely to reach the top surface 42a of each convex portion 42 rather than the base surface 41a. Therefore, the top surface thickness T2 is usually greater than the base surface thickness T1.
- the top surface metal layer 62 is provided around the flat portion 62a and the flat portion 62a located along the shape of the top surface 42a in a plan view facing the base body 41, and protrudes outward from the flat portion 62a.
- a curved peripheral surface portion 62b that is curved in this manner. That is, the curved peripheral surface portion 62b has a curved shape protruding toward the outside of the flat portion 62a.
- the radius of curvature of the curved surface portion 62b is preferably (T2 / 2) or more and (4 ⁇ T2) or less, and more preferably (T2 / 2) or more (2 ⁇ T2) or less.
- the portion of the base surface metal layer 61 sandwiched between the convex portions 42 adjacent in the Y direction is configured by a curved surface protruding in the direction in which the approximate center between the two convex portions 42 is away from the base surface 41a.
- a portion of the base surface metal layer 61 sandwiched between the convex portions 42 adjacent in the X direction is configured by a curved surface projecting in the direction away from the base surface 41 a at the substantially center between the two convex portions 42. ing.
- the radius of curvature in these portions is preferably (T1 / 2) or more and (4 ⁇ T1) or less, more preferably (T1 / 2) or more (2 ⁇ T1) or less.
- a portion of the base surface metal layer 61 that is not sandwiched between the two convex portions 42 in both the X direction and the Y direction is not limited in the flight angle of the particles forming the metal layer 31 reaching the base surface 41a. It is constituted by a substantially flat surface.
- each of the base surface metal layer 61 and the top surface metal layer 62 has a curved surface, the following effects can be obtained. (4) It is easy to form the metal layer 31 by physical vapor deposition such as vacuum vapor deposition or sputtering.
- the flat portion 62 a is part of the top surface 42 a in a plan view facing the base body 41. May be located.
- each convex portion 42 may include a side surface 42c that connects the top surface 42a and the base surface 41a, and the metal layer 31 may be positioned on the side surface 42c.
- the portion located on the side surface 42c is the side surface metal layer 63, and the thickness of the side surface metal layer 63 is the side surface thickness T3.
- the side surface thickness T3 is smaller than the base surface thickness T1 and smaller than the top surface thickness T2.
- the metal layer 31 is formed by the physical vapor deposition method described above, the top surface 42a of each convex portion 42 and the base surface 41a of the base body 41 are compared with the portion where the convex portion 42 is not formed. Particles for forming the metal layer 31 do not easily reach the side surface 42c of each convex portion 42. Therefore, according to the physical vapor deposition method, the metal layer 31 having a side surface thickness T3 smaller than each of the base surface thickness T1 and the top surface thickness T2 is easily formed.
- the side surface metal layer 63 may not be formed on the entire side surface 42c of each convex portion 42, but may be formed at least partially. Further, the side metal layer 63 may not be formed on all of the plurality of convex portions 42, and may be formed on a part of the plurality of convex portions 42.
- the following effects can be obtained.
- the state of the surface plasmon excited by the micro display unit 13 is changed as compared with the configuration in which the metal layer 31 covers only the base surface 41a and the top surface 42a. Therefore, the micro display unit 13 can transmit light having a color different from the light transmitted through the configuration in which the metal layer 31 covers only the base surface 41a and the top surface 42a.
- the side face thickness T3 of the metal layer 31 is smaller than each of the top face thickness T2 and the base face thickness T1
- the side face thickness T3 is equal to the top face thickness T2 and the base face thickness T1.
- the transmittance of the micro display unit 13 is increased as compared with the configuration of each of the above.
- the side surface thickness T3 is the top surface thickness T2 and the base surface thickness T1. Or more than each thickness.
- the metal layer 31 includes the side metal layer 63
- the top metal layer 62 is the same as the configuration shown in FIG. 8
- the base metal layer 61 is the same as the configuration shown in FIG. There may be.
- the side surface thickness T3 of the side metal layer 63 may be, for example, smaller as it is closer to the top surface 42a and larger as it is closer to the base surface 41a. Note that the thickness of the side metal layer 63 may be substantially equal throughout the side metal layer 63.
- the metal layer 31 includes the side metal layer 63
- the top metal layer 62 is the same as the configuration shown in FIG. 9, and the base metal layer 61 is the same as the configuration shown in FIG. There may be.
- the side surface thickness T3 of the side metal layer 63 may be, for example, smaller as it is closer to the top surface 42a and larger as it is closer to the base surface 41a. Note that the thickness of the side metal layer 63 may be substantially equal throughout the side metal layer 63.
- the plurality of convex portions 42 may be arranged in a hexagonal lattice shape.
- FIG. 14 when a plurality of convex portions 42 are arranged in a hexagonal lattice pattern, between one convex portion 42 and each of the six convex portions 42 positioned around one convex portion 42. The distance is equal to each other. That is, all of the plurality of convex portions 42 are aligned with the convex portions 42 adjacent to each other with a period P that is an equal interval.
- the plurality of convex portions 42 included in the dielectric layer 32 are not limited to a tetragonal lattice shape or a hexagonal lattice shape, and may be arranged in a trigonal lattice shape.
- a modification of the minute display unit 13 will be described with reference to FIG.
- the 1st display element 22 with which the micro display part 13 is provided may contain two or more plasmon structures from which the color of transmitted light mutually differs, and the 2nd display element 23 has the color of transmitted light mutually. Two or more different plasmon structures may be included.
- the first display element 22 includes two first portions 71 and two second portions 72, and each first portion 71 and each second portion 72 are different from each other. It is composed of a plasmon structure that transmits color light.
- the first portions 71 and the second portions 72 are alternately arranged in the column direction C and alternately in the row direction R, for example.
- the light transmitted through the first display element 22 includes the color of the light transmitted through each of the plurality of first portions 71 and the light transmitted through each of the plurality of second portions 72. It has a color mixture with colors. Therefore, the number of colors that can be displayed on the minute display unit 13 can be increased.
- the first portion 71 and the second portion 72 do not have to be alternately arranged in the column direction C or the row direction R, and the first portion 71 included in the first display element 22.
- the number of the second portions 72 may be different from each other.
- the first portions 71 and the second portions 72 are alternately arranged in each of the column direction C and the row direction R, and the number of the first portions 71 included in the first display element 22. If the number of the second portions 72 is the same as that of the second portion 72, the first display element 22 has no color deviation. Therefore, the first display element 22 is easily recognized as the display element 21 that displays one color.
- the second display element 23 includes a plurality of first portions 73 and a plurality of second portions 74, and each first portion 73 and each second portion 74 transmits light of different colors.
- the first portion 73 of the second display element 23 may include a plasmon structure that transmits light having the same color as the first portion 71 or the second portion 72 of the first display element 22.
- the second portion 74 of the second display element 23 may include a plasmon structure that transmits light having the same color as the first portion 71 or the second portion 72 included in the first display element 22.
- the first portions 73 and the second portions 74 are alternately arranged in the column direction C and alternately in the row direction R, for example. .
- the first portion 73 and the second portion 74 do not have to be arranged alternately in the column direction C or the row direction R.
- the first display element 22 includes the first portion 71 and the second portion 72 as a set of plasmon structures. It is preferable that plasmon structures that transmit different colors are mixed in the first display element 22 rather than including the first display element 22. Such a configuration is also preferable in the second display element 23 as well. Thereby, the bias of the color displayed by each display element is further suppressed.
- one display element 21 includes a plurality of plasmon structures having different colors of transmitted light, one display element 21 can transmit light having a mixed color of a plurality of colors. Therefore, the number of colors that can be displayed on the micro display unit 13 can be increased.
- size of the display part 12 does not need to be a magnitude
- the display unit 12 may have a size that can be observed with an optical microscope as long as the display unit 12 can include at least one minute display unit 13.
- the display element 21 may be configured to transmit white light.
- the period P of the plurality of protrusions 42 is irregular, the height of each of the plurality of protrusions 42 is not uniform, and the like. Since the states of the surface plasmons formed in units are different from each other, the display element 21 transmits white light. Note that, in the configuration in which the periods P of the plurality of convex portions 42 are irregular, that is, the plurality of convex portions 42 are irregularly arranged, surface plasmons in different states are likely to be excited inside the display element 21. Therefore, the light transmitted through the display element 21 is light in which a plurality of lights having different wavelengths are mixed.
- the light irradiated in the irradiation process may not be white light. Even if it is such a structure, if the light which can change the color of the plasmon structure with which the micro display part 13 is provided is contained in irradiation light, the effect according to (1) mentioned above can be acquired.
- the number of display elements 21 arranged in the row direction R and the number of display elements 21 arranged in the column direction C may be less than 10, There may be more than 100. Even if it is such a structure, the magnitude
- FIG. 1 as long as the minute display portion 13 includes a plasmon structure, the effect according to the above (1) can be obtained.
- the length L1 of one side of the display element 21 may be smaller than 200 nm or larger than 3000 nm. Even if it is such a structure, the magnitude
- All of the plurality of display elements 21 constituting the micro display unit 13 may transmit light of the same color. Even if it is such a structure, as long as each display element 21 contains a plasmon structure, the effect according to (1) mentioned above can be acquired.
- the period P at which the plurality of convex portions 42 are formed may be smaller than 100 nm or larger than 600 nm. Even if it is such a structure, surface plasmon is excited by the interface 33 between the metal layer 31 and the dielectric material layer 32, and what is necessary is just the structure which can change irradiation light into the transmitted light of a color different from irradiation light. .
- the real part of the complex dielectric constant in the visible light region may be 0 or more. Even if it is such a structure, if the micro display part 13 is provided with the plasmon structure containing the interface 33 of the metal layer 31 and the dielectric material layer 32, any wavelength contained in a visible light area
- the thickness of the metal layer 31 may be smaller than 20 nm or larger than 100 nm. Even in such a configuration, if the micro display unit 13 includes a plasmon structure including the interface 33 between the metal layer 31 and the dielectric layer 32, the irradiation light is irradiated by the surface plasmon excited by the plasmon structure. It can be changed to transmitted light of a different color from light.
- the distance between the base surface 41a and the virtual plane 42b may be smaller than 30 nm or larger than 500 nm. Even in such a configuration, if the micro display unit 13 includes a plasmon structure including the interface 33 between the metal layer 31 and the dielectric layer 32, the irradiation light is emitted by the surface plasmon excited by the plasmon structure. It can be changed to transmitted light of a different color from the irradiation light.
- the base surface 41a of the base body 41 and the virtual plane 42b included in the top surface 42a of each of the plurality of convex portions 42 may not be substantially parallel to each other, for example, at a predetermined angle You may cross. Even in such a configuration, if the micro display unit 13 includes a plasmon structure including the interface 33 between the metal layer 31 and the dielectric layer 32, the irradiation light is emitted by the surface plasmon excited by the plasmon structure. It can be changed to transmitted light of a different color from the irradiation light.
- the display body 10 may include a printing layer.
- the display body 10 includes a print layer 81, and the print layer 81 includes a plurality of print portions 82 having a wavy shape, and the plurality of print portions 82 is in one direction on the substrate 11. Are lined up at predetermined intervals.
- each printing part 82 may be arrange
- the print layer 81 is a single pattern formed from a plurality of wavy lines, and forms an example of a chromatic pattern.
- the printed layer 81 is formed from a chromatic pattern formed from a plurality of arc shapes or a plurality of circular shapes. May be formed.
- the printed layer 81 may form a chromatic pattern combining two or more of a wavy line shape, an arc shape, and a circular shape.
- the printing layer 81 may form a pattern formed from a geometric shape other than a wavy line shape, an arc shape, and a circular shape. That is, the image as information displayed on the print layer 81 may be a predetermined pattern.
- the print layer 91 included in the display body 10 is individual information such as a card number and a lot number instead of the predetermined pattern described above, and includes at least one of letters and numbers. Information may be formed. That is, the image as information displayed on the print layer 91 only needs to include at least one of predetermined characters and numbers.
- the printing layer 91 is composed of a plurality of printing portions 92, and the plurality of printing portions 92 are arranged in a predetermined direction on the substrate 11.
- Each printed portion 92 represents, for example, one number, and the plurality of printed portions 92 are, in order from the printed portion 92 with the smallest distance from one end of the substrate 11, the number “1”, the number “2”, and the number "3" of each is represented.
- each print portion 92 When viewed from the direction facing the display unit 12, a part of each print portion 92 overlaps the display unit 12. Further, when viewed from the direction facing the display unit 12, at least a part of the print portion 92 that overlaps the display unit 12 overlaps at least one of the micro display units 13. Each print portion 92 may be disposed at a position that overlaps the display unit 12 but does not overlap the minute display unit 13 when viewed from the direction facing the display unit 12.
- the image as information displayed by the print layers 81 and 91 is not limited to the above-described pattern, character, and number, and may be a figure and a symbol.
- the image, character, number, figure, and symbol A combination of at least two of them may be used.
- the display body 10 demonstrated with reference to FIG. 16 and the display body 10 demonstrated with reference to FIG. 17 differ in the image which a printing layer displays, it is between two display bodies 10.
- positioned is common. Therefore, below, the cross-sectional structure of the display body 10 described with reference to FIG. 16 will be described, and the description of the cross-sectional structure of the display body 10 described with reference to FIG. 17 will be omitted.
- the base material 11 includes the dielectric layer 32 included in the micro display unit 13, and the surface including the base surface 41 a of the dielectric layer 32 among the surfaces included in the base material 11 is the surface 11 a.
- the surface opposite to the front surface 11a is the back surface 11b.
- the display unit 12 formed of a metal layer is disposed on the surface 11a of the base material 11.
- the display unit 12 may be formed of a metal layer that is common to the metal layer 31 included in the micro display unit 13, or may be microscopic. You may form from the metal layer different from the metal layer 31 with which the display part 13 is provided.
- a plurality of printing portions 82 constituting the printing layer 81 are formed on the back surface 11 b of the base material 11.
- the printing portion 82 is a portion formed by, for example, ink containing a predetermined dye or pigment, and is formed by various printing methods such as a gravure printing method, an offset printing method, and a screen printing method. Part.
- the printing layer 81 may be formed on a portion other than the back surface 11b of the base material 11. That is, as shown in FIG. 19, a transparent resin layer 101 that covers the display unit 12 and the minute display unit 13 is formed on the surface 11 a of the substrate 11.
- the transparent resin layer 101 is a layer formed of a resin that can transmit light.
- the surface opposite to the surface in contact with the surface 11a of the substrate 11 is the surface 101a, and a plurality of printed portions 82 are formed on the surface 101a.
- the transparent resin layer 101 may be an adhesive layer for attaching the display body 10 to an article such as an object to be authenticated.
- the adhesive layer is separate from the transparent resin layer 101. You may form in the surface 101a of the transparent resin layer 101, or the back surface 11b of the base material 11. FIG.
- the print layer 81 may be formed on both the front surface 101 a of the transparent resin layer 101 and the back surface 11 b of the base material 11.
- the display body 10 includes the print layer 81 described above and the print layer 81 is disposed on the back surface 11b of the base material 11
- the display body 10 is viewed from the back surface 11b side of the base material 11.
- a part of the display unit 12, that is, a part of the second information displayed on the display unit 12 can be hidden from the observer by the print layer 81.
- the display body 10 in the configuration in which the print layer 81 is disposed on the surface 101 a of the transparent resin layer 101, when the display body 10 is viewed from the surface 101 a side of the transparent resin layer 101, a part of the display unit 12. That is, part of the second information displayed on the display unit 12 can be hidden from the observer by the print layer 81.
- the print layer 81 includes the information displayed on the print layer 81 and the second information by changing the angle at which the observer observes the display body 10. It is possible to individually observe the portion concealed by.
- the print layer 81 is a layer formed of ink as described above, while the display unit 12 is a layer formed of a metal layer. Therefore, the print layer 81 is different from the display unit 12. The second information is easily recognized.
- a configuration in which the second information to be displayed is not concealed is also possible.
- the information displayed on the print layer 81 and the second information displayed on the display unit 12 can be individually observed by changing the angle at which the observer observes the display body 10. Since the print layer 81 has an optical effect different from that of the display unit 12, the second information is easily recognized.
- the print layer 81 conceals at least one minute display unit 13, that is, at least one first information. According to such a configuration, the area where the first information is displayed by the print layer 81 can be restricted, and as a result, the position where the first information is arranged can be made difficult to understand.
- a configuration in which information is not concealed is also possible.
- the observer of the display body 10 pays attention to the second information and the information displayed on the print layer 81 when observing the second information. It is difficult to notice that the display body 10 can display information other than the information to be displayed. Therefore, it is possible to make the display 10 less likely to notice the first information.
- the print layer 81 when the first information is observed, the amount of transmitted light in the display body 10 other than the minute display unit 13 is reduced by the print layer 81, so that the first information and the surroundings of the first information are The contrast is increased, and as a result, the first information is more easily recognized.
- Such an effect can be obtained in any of the configuration in which the printed layer 81 is formed on the back surface 11 b of the base material 11 and the configuration in which the printed layer 81 is formed on the front surface 101 a of the transparent resin layer 101.
- this effect can be obtained both when the display body 10 is viewed from the front surface 11a side of the substrate 11 and when viewed from the back surface 11b side.
- an authentication target to which the display body 10 is attached. 50 may include a print layer 51.
- the print layer 51 includes a plurality of print portions 52, and each print portion 52 is connected to one of the plurality of print portions 82 formed on the display body 10 when viewed from the direction facing the display unit 12. . That is, the print layer 81 included in the display body 10 and the print layer 51 included in the authentication target 50 display one colored pattern.
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Abstract
Description
図1(a)および図1(b)を参照して表示体の全体構成を説明する。なお、図1(b)は、図1(a)において一点鎖線で示される円で囲まれた部分を拡大して示す図である。
図2を参照して微小表示部13のより詳しい構成を説明する。
図2が示すように、微小表示部13は、マトリクス状に並んだ複数の表示要素21から構成されている。表示要素21の各々は、例えば、表示部12の内部に区画された矩形形状を有する領域である。表示要素21は、矩形形状に限らず、例えば、三角形形状や五角形形状などの矩形以外の多角形形状を有した領域であってもよい。微小表示部13の表示する第1情報は、複数の情報要素から構成され、微小表示部13は、1つの情報要素ごとの表示要素21から構成されている。
図3から図5を参照して表示要素21の詳細な構成を説明する。以下では、表示要素21のうち、第1表示要素22および第2表示要素23のように、プラズモン構造体を含む表示要素21について説明する。
上述したように、各微小表示部13は、第1表示要素22と第2表示要素23とを備え、第1表示要素22と第2表示要素23との各々は、金属層31と誘電体層32との界面33を含み、界面33に励起される表面プラズモンによって、照射光とは異なる色の光を透過するプラズモン構造体を備えている。
[表示体の観察方法]
図6および図7を参照して表示体10の観察方法を説明する。
(1)微小表示部13は、所定の色を有する透過光によって第1情報を表示するため、表示体10の観察者OBは、所定の色を有した光と、それ以外の部分との差異によって、第1情報を把握することができる。それゆえに、第1情報である部分と、それ以外の部分との差異が認識されやすくなる。結果として、観察者OBが情報を誤認識することが抑えられる。
[金属層の構成]
図8から図12を参照して金属層31の変形例を説明する。
(4)真空蒸着法やスパッタ法といった物理蒸着法による金属層31の形成が容易である。
(5)金属層31がベース面41aと頂面42aとのみを覆う構成と比べて、微小表示部13にて励起される表面プラズモンの状態が変わる。それゆえに、微小表示部13は、金属層31がベース面41aと頂面42aとのみを覆う構成にて透過される光とは相互に異なる色を有した光を透過することが可能になる。
図13および図14を参照して誘電体層32の変形例を説明する。
・誘電体層32の備える複数の凸部42は、四方格子状に並んでいなくともよい。
[微小表示部の構成]
図15を参照して微小表示部13の変形例を説明する。
(7)1つの表示要素21が、透過光の色が相互に異なる複数のプラズモン構造体を含むため、1つの表示要素21は、複数の色の混色を有する光を透過することができる。それゆえに、微小表示部13の表示することの可能な色の数を増やすことができる。
・表示部12の大きさは、表示部12の表示する第2情報の表示サイズが目視で認識できる大きさでなくてもよい。表示部12は、少なくとも1つの微小表示部13を含むことができる大きさであれば、光学顕微鏡で観察できる程度の大きさであってもよい。
・図16から図19を参照して以下に説明するように、表示体10は印刷層を備えてもよい。
図18が示すように、基材11は、微小表示部13の備える誘電体層32を含み、基材11の備える面のうち、誘電体層32のベース面41aを含む面が表面11aであり、基材11のうちで表面11aとは反対側の面が裏面11bである。
表示体10が上述した印刷層81を備える構成であって、印刷層81が基材11の裏面11bに配置された構成では、表示体10が、基材11の裏面11b側から視認されるとき、表示部12の一部、すなわち、表示部12の表示する第2情報の一部を印刷層81によって観察者に対して隠蔽することができる。
・図20が示すように、表示体10が、上述した彩紋柄などの幾何学的な形状から構成される柄を表示する印刷層81を備える構成では、表示体10の付される被認証体50は、印刷層51を備えてもよい。印刷層51は複数の印刷部分52から構成され、表示部12と対向する方向から見て、各印刷部分52は、表示体10に形成された複数の印刷部分82のうちの1つと繋がっている。すなわち、表示体10の備える印刷層81と、被認証体50の備える印刷層51とが1つの彩紋柄を表示している。
Claims (15)
- 第1情報を表示する第1表示部と、
前記第1情報よりも表示サイズが大きい第2情報を表示する第2表示部と、を備え、
前記第2表示部が、前記第2表示部の一部として前記第1表示部の全体を含み、
前記第1表示部はプラズモン構造体を含み、
前記プラズモン構造体は、金属層と光を透過する誘電体層との界面を含み、前記界面に表面プラズモンを励起して、前記界面に照射される照射光を前記照射光とは異なる色の透過光に変えて、前記透過光によって前記第1情報を表示するように構成される
表示体。 - 前記第1情報は複数の情報要素を備え、前記複数の情報要素は、第1の色を表現する第1情報要素と、第2の色を表現する第2情報要素とを含み、
前記第1表示部は複数の表示要素を備え、前記複数の表示要素の各々が1つの前記情報要素に対応する
請求項1に記載の表示体。 - 少なくとも1つの前記表示要素は、前記照射光を相互に異なる色の前記透過光に変える複数の前記プラズモン構造体を含む
請求項2に記載の表示体。 - 前記誘電体層は、ベース面と、前記ベース面から突き出た複数の凸部とを有し、
前記ベース面と、複数の前記凸部の頂面を含む仮想平面とが、相互にほぼ平行であり、
前記金属層は、前記誘電体層の少なくとも一部を覆っている
請求項1から3のいずれか一項に記載の表示体。 - 前記誘電体層において、前記ベース面と前記仮想平面との間の距離が、30nm以上500nm以下である
請求項4に記載の表示体。 - 前記金属層の厚さが、20nm以上100nm以下であり、
前記金属層の形成材料において、可視光領域における複素誘電率の実部が負の値である
請求項4または5に記載の表示体。 - 前記金属層のうち、前記頂面に位置する部分は、前記頂面に沿って拡がる平坦部と、前記平坦部の周囲に設けられ、前記平坦部の外側に向けて突き出た曲面形状を有する周面と、を備え、
前記金属層のうち、前記ベース面に位置する部分は、相互に隣り合う前記凸部によって挟まれる領域のほぼ中心において最も突き出た凸形状を有する
請求項4から6いずれか1項に記載の表示体。 - 前記凸部の各々は、前記頂面と前記ベース面とを繋ぐ側面を備え、
前記金属層は、前記ベース面と、前記凸部の各々における前記頂面とを覆い、かつ、前記側面の少なくとも一部を覆っている
請求項4から7のいずれか1項に記載の表示体。 - 前記金属層において、前記側面を覆う部分の厚さが、前記頂面を覆う部分の厚さ、および、前記ベース面を覆う部分の厚さよりも小さい
請求項8に記載の表示体。 - 前記複数の凸部は、前記ベース面において三方格子状、四方格子状、および、六方格子状のいずれかの状態で並び、
前記ベース面と対向する平面視において、相互に隣り合う前記凸部における前記凸部の中心の間の距離は、100nm以上600nm以下である
請求項4から9のいずれか一項に記載の表示体。 - 前記複数の凸部は、前記ベース面において不規則に並んでいる
請求項4から9のいずれか一項に記載の表示体。 - 前記第1表示部は複数の表示要素を含み、
前記複数の表示要素の各々は、少なくとも1つの前記凸部を含む前記誘電体層の一部によって構成され、
前記複数の表示要素の少なくとも一部において、前記ベース面と対向する平面視における前記凸部の間での中心間距離、前記ベース面と前記仮想平面との間の距離、前記凸部の配列状態、前記金属層の厚さ、および、前記金属層の形成材料のうち、少なくとも1つが相互に異なっている
請求項4に記載の表示体。 - 前記表示要素の各々は多角形形状の領域を区画し、
前記多角形形状の領域における一辺の長さが、200nm以上3000nm以下である
請求項12に記載の表示体。 - 前記複数の表示要素はマトリクス状に並び、
前記複数の表示要素は、行方向および前記行方向と直交する列方向の各々に、10個以上100個以下の個数並ぶ
請求項12または13に記載の表示体。 - 表示体の観察方法であって、
前記表示体は、
第1情報を表示する第1表示部と、
前記第1情報よりも表示サイズが大きい第2情報を表示する第2表示部と、を備え、
前記第2表示部が、前記第2表示部の一部として前記第1表示部の全体を含み、
前記第1表示部はプラズモン構造体を含み、
前記プラズモン構造体は、金属層と光を透過する誘電体層との界面を含み、前記界面に表面プラズモンを励起して、前記界面に照射される照射光を前記照射光とは異なる色の透過光に変えて、前記透過光によって前記第1情報を表示するように構成され、
前記表示体の前記界面に前記照射光を照射する工程と、
前記照射光を照射されている前記表示体を拡大して観察する工程と、を備える
表示体の観察方法。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2943501A CA2943501C (en) | 2014-03-27 | 2015-03-27 | Display body and observing method for display body |
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JP2016510559A JP6645422B2 (ja) | 2014-03-27 | 2015-03-27 | 表示体、および、表示体の観察方法 |
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Also Published As
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CN106132722A (zh) | 2016-11-16 |
JP6645422B2 (ja) | 2020-02-14 |
CN106132722B (zh) | 2017-10-27 |
AU2015234717A1 (en) | 2016-10-27 |
US20170011665A1 (en) | 2017-01-12 |
JPWO2015147283A1 (ja) | 2017-04-13 |
EP3124283A1 (en) | 2017-02-01 |
AU2017276267A1 (en) | 2018-01-18 |
EP3124283B1 (en) | 2018-12-12 |
EP3450196A1 (en) | 2019-03-06 |
CA2943501C (en) | 2018-11-20 |
CA2943501A1 (en) | 2015-10-01 |
EP3450196B1 (en) | 2020-06-10 |
EP3124283A4 (en) | 2017-12-13 |
AU2017276267B2 (en) | 2019-09-12 |
AU2015234717B2 (en) | 2017-10-12 |
US10186175B2 (en) | 2019-01-22 |
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