# US 5,700,550 A · Transparent hologram seal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,700,550 A - Document ID: US5700550A - Status: Granted - Kind: A - Application number: 08/361,370 - Filed: 1994-12-22 - Granted: 1997-12-23 - Earliest claimed: 1993-12-27 - Assignees: Toppan Printing Co., Ltd. - Inventors: Haruo Uyama; Takahiro Harada; Mitsuru Kano; Nagahisa Matsudaira; Kazuhisa Hoshino; Satoshi Kitamura; Fuminobu Noguchi; Tsutomu Shikakubo - Web page: https://patentgrep.com/patent/US5700550A ## CPC - G03H 1/0256: {having specific functional layer} - B32B 33/00: Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class - G03H 1/24: using white light {, e.g. rainbow holograms} - G06K 19/06046: {Constructional details} - G06K 19/16: the marking being a hologram or diffraction grating - B32B 2307/40: having particular optical properties - B32B 2315/02: Ceramics - G03H 1/0011: {for security or authentication (holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032)} - G03H 1/0244: {Surface relief holograms (replicating hologram without interference recording G03H1/0276)} - G03H 2250/10: arranged to be transferred onto a carrier body - G03H 2250/12: Special arrangement of layers - Y10S 428/915: Fraud or tamper detecting - Y10S 428/917: Electroluminescent - Y10T 428/24942: including components having same physical characteristic in differing degree - Y10T 428/30: Self-sustaining carbon mass or layer with impregnant or other layer - G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00}) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A hologram forming layer, transparent evaporated layer, colored layer, adhesion anchor layer, and adhesive layer are sequentially laminated on the under surface of a base member. The laminated body is used as a seal by the presence of the adhesive layer. It is preferable for the base member to have adequate rigidity (flexibility, tensile strength) and surface flatness. The hologram forming layer has a relief type hologram image. The transparent evaporated layer is a multi-layered ceramic layer constructed by alternately laminating high-refractive index layers and low-refractive index layers and the thickness thereof is preferably set to 1 .mu.m or less. In the transparent evaporated layer, the color of visible light in predetermined wavelength range is changed according to the viewing angle when it is transmitted therethrough or reflected therefrom. ## Claims ### Claim 1 A laminate body comprising: a reflective base member; and a transparent layer formed on a portion of said base member such that a pattern is formed by contrast between the portion having the transparent layer formed thereon and a remainder portion, the transparent layer having a laminated structure of first and second ceramic materials having different refractive indices, the first and second ceramic materials being laminated by an evaporation method, the transparent layer selectively absorbing incident light rays such that a peak wavelength of absorption is shifted in an amount which depends on an angle of incidence of incident light rays, the selective absorption causing light emitted from the laminated body to have a color which varies depending on the angle of incidence of incident light rays, the color variation being detectable by an optical instrument. ### Claim 2 (depends on 1) The laminated body according to claim 1, wherein said first ceramic material is selected from the group consisting of magnesium oxide, silicon dioxide, magnesium fluoride, calcium fluoride, cerium fluoride, aluminum fluoride, and aluminum oxide and said second ceramic material is selected from the group consisting of titanium dioxide, zirconium dioxide, zinc sulfide, zinc oxide, indium oxide, cerium dioxide and tantalum oxide. ### Claim 3 (depends on 1) The laminated body according to claim 1, further comprising a thin film layer formed on said evaporated layer and formed of an element of one of groups III to VI or formed of an oxide, carbide, nitride, or boride of an element of one of groups III to VI. ### Claim 4 (depends on 1) The laminated body according to claim 1, further comprising a protection layer, which serves as an outer resistant member for said laminated body and is formed of diamond-like carbon, silicon carbide or boron carbide. ### Claim 5 (depends on 1) The laminated body according to claim 1, wherein said reflective base member reflects substantially all of the light incident thereon. ### Claim 6 A laminated body comprising: a reflective base member; and a transparent layer formed on said base member and having a laminated structure of first and second ceramic materials having different refractive indices, a first portion of the transparent layer having a different number of layers in the laminated structure than a second portion of the transparent layer such that a pattern is formed by contrast between the first and second portions, the first and second ceramic materials being laminated by an evaporation method, the transparent layer selectively absorbing incident light rays such that a peak wavelength of absorption is shifted in an amount which depends on an angle of incidence of incident light rays, the selective absorption causing light emitted from the laminated body to have a color which varies depending on the angle of incidence of incident light rays, the color variation being detectable by an optical instrument. ### Claim 7 (depends on 6) The laminated body according to claim 6, wherein said first ceramic material is selected from the group consisting of magnesium oxide, silicon dioxide, magnesium fluoride, calcium fluoride, cerium fluoride, aluminum fluoride, and aluminum oxide and said second ceramic material is selected from the group consisting of titanium dioxide, zirconium dioxide, zinc sulfide, zinc oxide, indium oxide, cerium dioxide and tantalum oxide. ### Claim 8 (depends on 6) The laminated body according to claim 6, further comprising a thin film layer formed on said evaporated layer and formed of an element of one of groups III to VI or formed of an oxide, carbide, nitride, or boride of an element of one of groups III to VI. ### Claim 9 (depends on 6) The laminated body according to claim 6, further comprising a protection layer, which serves as an outer resistant member for said laminated body and is formed of diamond-like carbon, silicon carbide or boron carbide. ### Claim 10 (depends on 6) The laminated body according to claim 6, wherein said reflective base member reflects substantially all of the light incident thereon. ### Claim 11 A laminated body comprising: a reflective base member; and a transparent layer formed on said base member and having a laminated structure of first and second ceramic materials having different refractive indices, a first portion of the transparent layer having a thickness different than a thickness of a second portion of the transparent layer such that a pattern is formed by contrast between the first and second portions, the first and second ceramic materials being laminated by an evaporation method, the transparent layer selectively absorbing incident light rays such that a peak wavelength of absorption is shifted in an amount which depends on an angle of incidence of incident light rays, the selective absorption causing light emitted from the laminated body to have a color which varies depending on the angle of incidence of incident light rays, the color variation being detectable by an optical instrument. ### Claim 12 (depends on 11) The laminated body according to claim 11, wherein said first ceramic material is selected from the group consisting of magnesium oxide, silicon dioxide, magnesium fluoride, calcium fluoride, cerium fluoride, aluminum fluoride, and aluminum oxide and said second ceramic material is selected from the group consisting of titanium dioxide, zirconium dioxide, zinc sulfide, zinc oxide, indium oxide, cerium dioxide and tantalum oxide. ### Claim 13 (depends on 11) The laminated body according to claim 11, further comprising a thin film layer formed on said evaporated layer and formed of an element of one of groups III to VI or formed of an oxide, carbide, nitride, or boride of an element of one of groups III to VI. ### Claim 14 (depends on 11) The laminated body according to claim 11, further comprising a protection layer, which serves as an outer resistant member for said laminated body and is formed of diamond-like carbon, silicon carbide or boron carbide. ### Claim 15 (depends on 11) The laminated body according to claim 11, wherein said reflective base member reflects substantially all of the light incident thereon.