Patents by Inventor Masanobu Ohgane
Masanobu Ohgane 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: 9452571Abstract: An optical element molding die is designed for molding an optical element having a concave-convex structure. The optical element can be manufactured by a wet system that enables element formation over a large area and a curved surface, without using a lithographic process, and is advantageous in terms of mass production and equipment cost. The optical element molding die includes a substrate having a surface with a negative standard electrode potential in the oxidation reaction and an anodic oxidation layer provided on the substrate. A protective layer with the positive standard electrode potential is provided between the substrate and the anodic oxidation layer.Type: GrantFiled: March 18, 2013Date of Patent: September 27, 2016Assignee: Canon Kabushiki KaishaInventor: Masanobu Ohgane
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Publication number: 20130228942Abstract: An optical element molding die is designed for molding an optical element having a concave-convex structure. The optical element can be manufactured by a wet system that enables element formation over a large area and a curved surface, without using a lithographic process, and is advantageous in terms of mass production and equipment cost. The optical element molding die includes a substrate having a surface with a negative standard electrode potential in the oxidation reaction and an anodic oxidation layer provided on the substrate. A protective layer with the positive standard electrode potential is provided between the substrate and the anodic oxidation layer.Type: ApplicationFiled: March 18, 2013Publication date: September 5, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Masanobu Ohgane
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Patent number: 8449284Abstract: An optical element molding die is designed for molding an optical element having a concave-convex structure. The optical element can be manufactured by a wet system that enables element formation over a large area and a curved surface, without using a lithographic process, and is advantageous in terms of mass production and equipment cost. The optical element molding die includes a substrate having a surface with a negative standard electrode potential in the oxidation reaction and an anodic oxidation layer provided on the substrate. A protective layer with the positive standard electrode potential is provided between the substrate and the anodic oxidation layer.Type: GrantFiled: November 6, 2009Date of Patent: May 28, 2013Assignee: Canon Kabushiki KaishaInventor: Masanobu Ohgane
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Publication number: 20100119782Abstract: An optical element molding die is designed for molding an optical element having a concave-convex structure. The optical element can be manufactured by a wet system that enables element formation over a large area and a curved surface, without using a lithographic process, and is advantageous in terms of mass production and equipment cost. The optical element molding die includes a substrate having a surface with a negative standard electrode potential in the oxidation reaction and an anodic oxidation layer provided on the substrate. A protective layer with the positive standard electrode potential is provided between the substrate and the anodic oxidation layer.Type: ApplicationFiled: November 6, 2009Publication date: May 13, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Masanobu Ohgane
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Patent number: 6870677Abstract: An optical element having a diffraction shape uses an optical material comprising at least N-vinylcarbazole, polyvinylcarbazole, and the light polymerization initiator. By using such optical material, it is possible to suppress crystallization of the optical material during molding even at room temperature and appropriately control the dropping amount suited for replica molding. It is possible to provide the optical material also suited for replica molding at room temperature by setting a ratio of N-vinylcarbazole to polyvinylcarbazole, i.e. N-vinylcarbazole/polyvinylcarbazole, to a range between 90/10 and 70/30.Type: GrantFiled: April 10, 2003Date of Patent: March 22, 2005Assignee: Canon Kabushiki KaishaInventor: Masanobu Ohgane
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Patent number: 6695458Abstract: A high-reflectance silver mirror has a high-reflectance film comprising a silver layer formed on a base material made of phosphorus-containing glass. The high-reflectance film is formed by a wet film-forming process on an acid-resistant protection film covering the base material. A reflecting optical element employing the high-reflectance silver mirror, and a process for producing the high-reflectance silver mirror are also provided. The high-reflectance silver mirror is producible at a reduced cost and has improved reflectivity.Type: GrantFiled: September 7, 2001Date of Patent: February 24, 2004Assignee: Canon Kabushiki KaishaInventors: Masanobu Ohgane, Hideyuki Hatakeyama
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Patent number: 6665120Abstract: The present invention provides a reflective optical element being excellent in reflectivity and transmittance having a metallic thin film being excellent in durability and abrasion resistance wherein, in the reflective optical element in which light impinges in the transparent substrate and projects out after repeating reflection on the back plane, the reflection plane is formed by laminating the transparent substrate, metallic thin film and amorphous fluorocarbon resin in this order while forming a layer of the amorphous fluorocarbon resin on the incident and projection planes simultaneously with forming the layer on the outermost layer to allow durability and abrasion resistance to be improved with the amorphous fluorocarbon resin on the reflection plane, silver being deposited on the metallic layer by electroless plating in depositing the films while the amorphous fluorocarbon resin being preferably deposited by a wet film-deposition method such as a dip-coating method.Type: GrantFiled: September 13, 1999Date of Patent: December 16, 2003Assignee: Canon Kabushiki KaishaInventors: Hideyuki Hatakeyama, Masanobu Ohgane
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Publication number: 20030197941Abstract: An optical element having a diffraction shape uses an optical material comprising at least N-vinylcarbazole, polyvinylcarbazole, and the light polymerization initiator. By using such optical material, it is possible to suppress crystallization of the optical material during molding even at room temperature and appropriately control the dropping amount suited for replica molding. It is possible to provide the optical material also suited for replica molding at room temperature by setting a ratio of N-vinylcarbazole to polyvinylcarbazole, i.e. N-vinylcarbazole/polyvinylcarbazole, to a range between 90/10 and 70/30.Type: ApplicationFiled: April 10, 2003Publication date: October 23, 2003Applicant: CANON KABUSHIKI KAISHAInventor: Masanobu Ohgane
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Publication number: 20030180563Abstract: When a light beam is incident on a diffraction optical element at a large incidence angle, the light beam is shaded to generate flare or ghost, thereby increasing chromatic aberration. To solve this, polyvinylcarbazole is used as an optical element material to form a diffraction optical element in a mold by means of heat molding, solvent evaporation, thermal polymerization, photopolymerization, and the like. In particular, for the thermal polymerization and the photopolymerization, N-vinylcarbazole, i.e., fluid monomer, is supplied into a mold and is then polymerized. Even if the diffractive structure is complicated and fine, it can be easily shaped. An optical material to be used comprises polyvinylcarbazole added with a thermal initiator, a photoinitiator, a compound having two or more unsaturated ethylene groups with a photoinitiator, and the like.Type: ApplicationFiled: February 26, 2003Publication date: September 25, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Hideo Ukuda, Masanobu Ohgane
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Publication number: 20030026994Abstract: The present invention provides a reflective optical element being excellent in reflectivity and transmittance having a metallic thin film being excellent in durability and abrasion resistance wherein, in the reflective optical element in which light impinges in the transparent substrate and projects out after repeating reflection on the back plane, the reflection plane is formed by laminating the transparent substrate, metallic thin film and amorphous fluorocarbon resin in this order while forming a layer of the amorphous fluorocarbon resin on the incident and projection planes simultaneously with forming the layer on the outermost layer to allow durability and abrasion resistance to be improved with the amorphous fluorocarbon resin on the reflection plane, silver being deposited on the metallic layer by electroless plating in depositing the films while the amorphous fluorocarbon resin being preferably deposited by a wet film-deposition method such as a dip-coating method.Type: ApplicationFiled: September 13, 1999Publication date: February 6, 2003Inventors: HIDEYUKI HATAKEYAMA, MASANOBU OHGANE
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Patent number: 6511190Abstract: A reflection type optical device comprises a transparent base member having an incident light receiving surface, at least a reflection surface for internally reflecting the incident light and a light emitting surface for emitting the reflected light. A dielectric layer is formed on each of the incident light receiving surface and the light emitting surface, and a metal layer is formed on all the remaining surfaces of the transparent base member other than the incident light receiving surface and the light emitting surface.Type: GrantFiled: June 25, 2001Date of Patent: January 28, 2003Assignee: Canon Kabushiki KaishaInventor: Masanobu Ohgane
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Publication number: 20020132109Abstract: A reflective optical element includes a transparent resinous substrate and a highly reflective silver film formed on the substrate by at least a wet film formation technique, and a target image is obtained by utilizing reflection on the surface of, or at the back of, the highly reflective silver film. The method of producing this optical element is also disclosed. The silver film constituting the optical element is excellent in reflection characteristics without showing unevenness in film, and is satisfactory in adhesion with the substrate.Type: ApplicationFiled: September 8, 1999Publication date: September 19, 2002Inventors: HIDEYUKI HATAKEYAMA, MASANOBU OHGANE
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Publication number: 20020054959Abstract: A high-reflectance silver mirror has a high-reflectance film comprising a silver layer formed on a base material made of phosphorus-containing glass. The high-reflectance film is formed by a wet film-forming process on an acid-resistant protection film covering the base material. A reflecting optical element employing the high-reflectance silver mirror, and a process for producing the high-reflectance silver mirror are also provided. The high-reflectance silver mirror is producible at a reduced cost and has improved reflectivity.Type: ApplicationFiled: September 7, 2001Publication date: May 9, 2002Inventors: Masanobu Ohgane, Hideyuki Hatakeyama
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Publication number: 20020036829Abstract: A reflection type optical device comprises a transparent base member having an incident light receiving surface, at least a reflection surface for internally reflecting the incident light and a light emitting surface for emitting the reflected light. A dielectric layer is formed on each of the incident light receiving surface and the light emitting surface, and a metal layer is formed on all the remaining surfaces of the transparent base member other than the incident light receiving surface and the light emitting surface.Type: ApplicationFiled: June 25, 2001Publication date: March 28, 2002Inventor: Masanobu Ohgane