Patents by Inventor Hiroyuki Ohtaki
Hiroyuki Ohtaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10474099Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: November 14, 2016Date of Patent: November 12, 2019Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Publication number: 20170060087Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: November 14, 2016Publication date: March 2, 2017Inventors: Minoru AZAKAMI, Koji ETO, Hiroyuki OHTAKI, Yoshihito MAENO, Sakurako HATORI
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Patent number: 9529324Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: February 25, 2014Date of Patent: December 27, 2016Assignee: DAI NIPPON PRINTING CO., LTD.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Patent number: 8852828Abstract: This invention provides a volume hologram photosensitive composition, which can realize a hologram having an excellent brightness and, at the same time, having excellent heat resistance and mechanical strength, and a photosensitive medium for volume hologram recording using the volume hologram photosensitive composition. The volume hologram photosensitive composition comprises at least a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the initiator, and a binder resin. The binder resin comprises a heat curing resin, and optionally a thermoplastic resin, and the thermoplastic resin is contained in an amount of 0 to 25% by weight based on the total solid content of the photosensitive composition.Type: GrantFiled: July 5, 2006Date of Patent: October 7, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Yoshihito Maeno, Hiroyuki Ohtaki
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Publication number: 20140240805Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: February 25, 2014Publication date: August 28, 2014Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Minoru AZAKAMI, Koji ETO, Hiroyuki OHTAKI, Yoshihito MAENO, Sakurako HATORI
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Patent number: 8697314Abstract: A method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. The method uses a volume hologram forming substrate which includes: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound. The producing method includes processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: February 28, 2008Date of Patent: April 15, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Patent number: 8481232Abstract: The present invention is provided to enhance security of a volume hologram by recording therein individualized information such as information of character, numerical character, picture pattern, biometric matter and/or the like by irradiating laser light to the volume hologram thereby modifying the same physically or chemically, and is related to a laser marking hologram comprising a volume hologram layer 2 including interference fringes recorded therein, wherein the volume hologram layer 2 includes information of character, numerical character, picture pattern, biometric matter, and/or the like recorded therein having a contrast between an irradiated portion and a non-irradiated portion thereof provided by selectively irradiating laser light 10 to the volume hologram layer 2 in a manner to modify 11 the irradiated portion.Type: GrantFiled: September 19, 2011Date of Patent: July 9, 2013Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masachika Watanabe, Kenji Ueda, Hiroyuki Ohtaki
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Publication number: 20120009508Abstract: The present invention is provided to enhance security of a volume hologram by recording therein individualized information such as information of character, numerical character, picture pattern, biometric matter and/or the like by irradiating laser light to the volume hologram thereby modifying the same physically or chemically, and is related to a laser marking hologram comprising a volume hologram layer 2 including interference fringes recorded therein, wherein the volume hologram layer 2 includes information of character, numerical character, picture pattern, biometric matter, and/or the like recorded therein having a contrast between an irradiated portion and a non-irradiated portion thereof provided by selectively irradiating laser light 10 to the volume hologram layer 2 in a manner to modify 11 the irradiated portion.Type: ApplicationFiled: September 19, 2011Publication date: January 12, 2012Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Masachika WATANABE, Kenji UEDA, Hiroyuki OHTAKI
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Patent number: 8081358Abstract: The present invention is provided to enhance security of a volume hologram by recording therein individualized information such as information of character, numerical character, picture pattern, biometric matter and/or the like by irradiating laser light to the volume hologram thereby modifying the same physically or chemically, and is related to a laser marking hologram comprising a volume hologram layer 2 including interference fringes recorded therein, wherein the volume hologram layer 2 includes information of character, numerical character, picture pattern, biometric matter, and/or the like recorded therein having a contrast between an irradiated portion and a non-irradiated portion thereof provided by selectively irradiating laser light 10 to the volume hologram layer 2 in a manner to modify 11 the irradiated portion.Type: GrantFiled: November 21, 2005Date of Patent: December 20, 2011Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masachika Watanabe, Kenji Ueda, Hiroyuki Ohtaki
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Patent number: 7910186Abstract: A multilayered volume hologram structure of the invention comprises a substrate 2 for a certificate or the like, and an adhesive layer 5, a volume hologram layer 5 and a surface protective film 7 laminated on the substrate in the described order. When a multilayer structure consisting of the volume hologram layer 5 and surface protective layer 5 is forcibly released from the substrate for the purpose of making a photograph replacement or falsifying a personal information area, the volume hologram image can break down certainly, thereby ensuring prevention of falsification. A multilayered volume hologram structure-making label is useful for making a multilayered volume hologram structure.Type: GrantFiled: October 24, 2002Date of Patent: March 22, 2011Assignee: Dai Nippon Printing Co., Ltd.Inventors: Akio Morii, Satoru Hamada, Hiroyuki Ohtaki, Kenji Ueda, Shingo Nishikawa
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Patent number: 7820263Abstract: The present invention relates to a volume hologram laminate with low generation of spotty hologram flaws in the volume hologram layer even when kept under pressurized conditions during storage, and to a volume hologram laminate-fabricating label. The volume hologram laminate 1 of the invention has a first adhesive layer 3, a volume hologram layer 5, a second adhesive layer 4 and a surface protective film 6 formed in that order on a substrate 1, wherein the volume hologram layer is a hologram recording in a recording material comprising a matrix polymer and a photopolymerizable compound, having a glass transition point of 30° C.-70° C. and a dynamic storage elastic modulus of 5×105 Pa-5×107 Pa at 50° C. when measured at 6.28 rad/s, and the second adhesive layer has a dynamic storage elastic modulus of no greater than 5×104 Pa or at least 2.5×105 Pa at 50° C. when measured at 6.28 rad/s.Type: GrantFiled: August 16, 2004Date of Patent: October 26, 2010Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hiroyuki Ohtaki, Kenji Ueda
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Publication number: 20100104952Abstract: A method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. The method uses a volume hologram forming substrate which includes: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound. The producing method includes processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: February 28, 2008Publication date: April 29, 2010Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Publication number: 20090279168Abstract: The object of the invention is to provide an adhesive composition attaining, in a single layer, both adhesiveness capable of direct attachment to a glass plate disposed on the front face of a display device and desired optical filter functions and hardly undergoing the change in spectral characteristics attributable to deterioration in a light absorbing agent, even during long-time use, particularly at high temperature under high humidity, as well as an optical filter using this adhesive composition. The object is solved by an optical filter comprising an adhesive layer having optical filter functions, comprising a block copolymer (I) having at least a specific triblock structure in its molecule and having a weight average molecular weight of 50,000 or more and a molecular weight distribution (Mw/Mn) of less than 1.5, a resin (IV) having the glass transition temperature of 60° C. or more and one or more light absorbing agents (III) each having light absorption in a predetermined wavelength region.Type: ApplicationFiled: September 28, 2007Publication date: November 12, 2009Inventors: Yuka Hiwatashi, Toshio Yoshihara, Yudai Yamashita, Hiroyuki Ohtaki
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Patent number: 7268926Abstract: A hologram laminate and a hologram label allow traces of separation of the hologram to be clearly left on both the adherend and the hologram label and hence makes it possible to prevent reuse of the hologram and is excellent in graphical design function and suitable for certification purposes. The hologram laminate has a colored layer, a release pattern, a transparent film, a hologram layer and a surface protective layer laminated on an adherend in the order mentioned. The hologram layer includes a volume hologram layer having a relief hologram forming relief interference fringe pattern formed on a surface thereof. When the hologram is separated between the adherend and the transparent film, the colored layer is left on the adherend in a pattern corresponding to the release pattern.Type: GrantFiled: May 2, 2006Date of Patent: September 11, 2007Assignee: Dai Nippon Printing Co., Ltd.Inventors: Miwa Ishimoto, Masachika Watanabe, Hiroyuki Ohtaki, Kenji Ueda
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Publication number: 20070148556Abstract: A volume hologram recording material having a composition that is adjusted in accordance with a recording wavelength in a visible region set individually and specifically, and is excellent in sensitivity or hologram recording performance. A photosensitive composition for volume hologram recording having a photopolymerizable compound, a photopolymerization initiator and a sensitizing dye, and a maximum absorption wavelength of the sensitizing dye deviates by 14 nm or more from a predetermined volume hologram recording wavelength set in a visible region and the composition itself has absorption at the volume hologram recording wavelength.Type: ApplicationFiled: December 21, 2004Publication date: June 28, 2007Inventors: Yoshihito Maeno, Hiroyuki Ohtaki, Toshio Yoshihara, Junichiro Ihara, Fumio Matsui
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Publication number: 20070064308Abstract: Disclosed are a fine-pitch and lightweight optical sheet and a production process which can produce the optical sheet very easily at low cost. The optical sheet comprises an optical function layer formed of a thermoplastic resin. The optical function layer has been formed by shaping the surface of the thermoplastic resin into cylindrical lenses, and the pitch of the shaped cylindrical lenses is not more than 150 ?m.Type: ApplicationFiled: November 20, 2006Publication date: March 22, 2007Applicant: Dai Nippon Printing Co., Ltd.Inventors: Hiroyuki Amemiya, Hideaki Yamagata, Hiroyuki Ohtaki
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Publication number: 20070009807Abstract: This invention provides a volume hologram photosensitive composition, which can realize a hologram having an excellent brightness and, at the same time, having excellent heat resistance and mechanical strength, and a photosensitive medium for volume hologram recording using the volume hologram photosensitive composition. The volume hologram photosensitive composition comprises at least a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the initiator, and a binder resin. The binder resin comprises a heat curing resin, and optionally a thermoplastic resin, and the thermoplastic resin is contained in an amount of 0 to 25% by weight based on the total solid content of the photosensitive composition.Type: ApplicationFiled: July 5, 2006Publication date: January 11, 2007Applicant: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Yoshihito Maeno, Hiroyuki Ohtaki
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Patent number: 7101644Abstract: The invention provides a hologram transfer foil comprising a substrate and a transfer layer laminated thereon, said transfer layer comprising a surface protective layer, a thermoplastic resin layer, a hologram layer and a heat seal layer in this order. The hologram transfer foil is applied on the heat seal layer side to an application member. In this case, a peel force between the substrate and the surface protective layer is smaller than that between adjacent layers in other layers. This hologram transfer foil enables a hologram image, etc. to be reconstructed in an uninterrupted manner, and is improved in terms of transferability and productivity.Type: GrantFiled: June 22, 2001Date of Patent: September 5, 2006Assignee: Dai Nippon Printing Co., Ltd.Inventors: Tetsuya Toshine, Hiroyuki Ohtaki, Kenji Ueda
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Publication number: 20060193021Abstract: A hologram laminate allows traces of separation of the hologram to be clearly left on both the adherend and the hologram label and hence makes it possible to prevent reuse of the hologram and is excellent in graphical design function and suitable for certification purposes. A hologram label used for the fabrication of the hologram laminate is also provided. The hologram laminate has a colored layer, a release pattern, a transparent film, a hologram layer and a surface protective layer laminated on an adherend in the order mentioned. The hologram layer includes a volume hologram layer and a relief hologram layer having a transparent thin-film layer over the surface of the relief interference fringe pattern. The volume hologram layer and the relief hologram layer are superimposed so as to be switchable from one to another. The hologram laminate is separable between the adherend and the transparent film.Type: ApplicationFiled: May 2, 2006Publication date: August 31, 2006Inventors: Miwa Ishimoto, Masachika Watanabe, Hiroyuki Ohtaki, Kenji Ueda
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Patent number: 7085024Abstract: A hologram laminate and a hologram label allow traces of separation of the hologram to be clearly left on both the adherend and the hologram label and hence makes it possible to prevent reuse of the hologram and is excellent in graphical design function and suitable for certification purposes. The hologram laminate has a colored layer, a release pattern, a transparent film, a hologram layer and a surface protective layer laminated on an adherend in the order mentioned. The hologram layer includes a volume hologram layer and a relief hologram layer having a transparent thin-film layer over the surface of a relief interference fringe pattern. When the hologram is separated between the adherend and the transparent film, the colored layer is left on the adherend in a pattern corresponding to the release pattern.Type: GrantFiled: May 29, 2002Date of Patent: August 1, 2006Assignee: Dai Nippon Printing Co., Ltd.Inventors: Miwa Ishimoto, Masachika Watanabe, Hiroyuki Ohtaki, Kenji Ueda