Patents by Inventor Motoo Takada
Motoo Takada 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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Publication number: 20150116832Abstract: An optical component includes an optical substrate and a first band-pass filter disposed on the optical substrate. The first band-pass filter includes a high refractive index layer having a first refractive index, and a low refractive index layer having a second refractive index lower than the first refractive index. The high refractive index layer and the low refractive index layer are layered. An expression (nL×dL)/(nH×dH)?0.50 (1) is fulfilled, wherein the first refractive index is nH, the second refractive index is nL, the high refractive index layer has a physical film thickness of dH, and the low refractive index layer has a physical film thickness of dL.Type: ApplicationFiled: October 20, 2014Publication date: April 30, 2015Inventors: KEI KAMIUTO, FUTOSHI ISHII, MOTOO TAKADA
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Patent number: 8437097Abstract: An optical filter is provided having an optical plate which has a chamfered section formed on an outer peripheral edge section of one principle surface of the optical plate and has isotropy with respect to wet-etching. The chamfered section is of an arc shape which is cross-sectionally concave in an inward direction of the optical plate.Type: GrantFiled: July 20, 2010Date of Patent: May 7, 2013Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Takuji Yamamoto, Nobuo Hiruma, Motoo Takada, Kozo Ono, Masahiro Yoshimatsu, Takehiro Takahashi
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Patent number: 8424746Abstract: To easily bond substrates even made of materials whose linear expansion coefficients are different from each other when manufacturing an optical component used by transmitting light through an inside thereof. Buffer layers made of an amorphous inorganic substance causing a brittle fracture are formed on bonding surfaces of a plurality of substrates having linear expansion coefficients different from one another, and the substrates to be bonded are stacked so that the buffer layers are faced to each other. Then, a heat treatment is performed for a stack, and thereby direct bonding via an atom is formed between the buffer layers.Type: GrantFiled: November 16, 2009Date of Patent: April 23, 2013Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Kazumasa Adachi, Motoo Takada, Kozo Ono
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Patent number: 8367191Abstract: Optical thin-films are disclosed that are formed from optical thin films formed on a base plate arranged in a vacuum chamber. The base plates are held on a plurality of retaining frames of a base-plate retainer. The thin films are formed by heating the base plate and emitting a deposition material from a deposition source. The retaining frames are configured to make the entire base plate uniformly heated.Type: GrantFiled: November 9, 2011Date of Patent: February 5, 2013Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Shinya Kikegawa, Toshimasa Nishi, Motoo Takada
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Publication number: 20120263872Abstract: Optical multilayer thin-film filters (OMTFFs) are disclosed. An exemplary filter includes a transparent substrate, a multilayer film (MF) on a surface of the substrate, and a top layer. The MF is of alternatingly laminated layers of a high-refractive-index (HRI) material and a low-refractive-index (LRI) material. The top layer is on an uppermost layer of the MF and is of a material having atoms of lower atomic weight than atoms of either the HRI or LRI materials. The OMTFFs are made in a vacuum environment by alternatingly laminating respective thin films of the HRI and LRI materials on the substrate. The top layer is formed on the MF. Between forming the MF and top layer is a suppression step in which the newly formed MF is exposed to moisture by briefly venting the vacuum to atmosphere. The moisture inhibits migration of the low-molecular-weight atoms into the HRI and LRI materials.Type: ApplicationFiled: June 25, 2012Publication date: October 18, 2012Inventors: Motoo TAKADA, Shinya KIKEGAWA, Toshimasa NISHI, Hiroto ISHIKAWA
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Patent number: 8233219Abstract: Optical multilayer thin-film filters (OMTFFs) are disclosed. An exemplary filter includes a transparent substrate, a multilayer film (MF) on a surface of the substrate, and a top layer. The MF is of alternatingly laminated layers of a high-refractive-index (HRI) material and a low-refractive-index (LRI) material. The top layer is on an uppermost layer of the MF and is of a material having atoms of lower atomic weight than atoms of either the HRI or LRI materials. The OMTFFs are made in a vacuum environment by alternatingly laminating respective thin films of the HRI and LRI materials on the substrate. The top layer is formed on the MF. Between forming the MF and top layer is a suppression step in which the newly formed MF is exposed to moisture by briefly venting the vacuum to atmosphere. The moisture inhibits migration of the low-molecular-weight atoms into the HRI and LRI materials.Type: GrantFiled: December 8, 2008Date of Patent: July 31, 2012Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Motoo Takada, Shinya Kikegawa, Toshimasa Nishi, Hiroto Ishikawa
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Publication number: 20120064315Abstract: Optical thin-films are disclosed that are formed from optical thin films formed on a base plate arranged in a vacuum chamber. The base plates are held on a plurality of retaining frames of a base-plate retainer. The thin films are formed by heating the base plate and emitting a deposition material from a deposition source. The retaining frames are configured to make the entire base plate uniformly heated.Type: ApplicationFiled: November 9, 2011Publication date: March 15, 2012Inventors: Shinya Kikegawa, Toshimasa Nishi, Motoo Takada
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Patent number: 8075947Abstract: Optical thin-film-forming methods are disclosed that form optical thin film on a base plate arranged in a vacuum chamber. An exemplary method includes the steps of retaining the base plates on a plurality of retaining frames of a base-plate retainer, heating the base plate, and emitting a deposition material from a deposition source. The retaining frames are configured to make the entire base plate uniformly heated.Type: GrantFiled: June 4, 2008Date of Patent: December 13, 2011Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Shinya Kikegawa, Toshimasa Nishi, Motoo Takada
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Patent number: 7891486Abstract: An objective of the present invention is to provide a shipping tray for optical elements that prevents toppling of optical elements during transportation and optimally maintains the optical characteristics of the optical elements. In a shipping tray for optical elements, single edges of a plurality of optical elements, each having two main surfaces formed as horizontal flat surfaces, are sequentially disposed upright in the lateral and longitudinal directions on an adhesive tape provided on a base surface of a main container; and the plurality of optical elements is covered with a cover in which is formed a plurality of concavities for individually accommodating the plurality of optical elements. Each concavity in the cover has an aperture portion provided in a plateau portion thereof, into which is inserted one of the optical elements upright with the free edge side protruding therefrom, and the shape of the aperture portion is oval.Type: GrantFiled: December 20, 2007Date of Patent: February 22, 2011Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Motoo Takada, Ryoichi Koseki
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Publication number: 20110019296Abstract: An object of the invention is to provide an optical filter that prevents an optical thin film formed on an optical plate from being partially removed, and prevents micro-cracks occurring in an outer peripheral edge section of a principle surface of the optical plate, and that has a high yield rate. An optical filter is provided with an optical plate which has a chamfered section formed on an outer peripheral edge section of one principle surface of the optical plate, and has isotropy with respect to wet-etching, and the chamfered section is of an arc shape which is cross-sectionally concave in an inward direction of the optical plate, and is formed by means of wet-etching. A crossing angle between the one principle surface and a concave surface where the chamfered section is formed, and a crossing angle between the concave surface and a side surface of the optical plate 3 where the chamfered section is formed, namely, crossing angles ?G and ?H are respectively 100° or greater and less than 180° .Type: ApplicationFiled: July 20, 2010Publication date: January 27, 2011Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: Takuji Yamamoto, Nobuo Hiruma, Motoo Takada, Kozo Ono, Masahiro Yoshimatsu, Takehiro Takahashi
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Publication number: 20100136306Abstract: To easily bond substrates even made of materials whose linear expansion coefficients are different from each other when manufacturing an optical component used by transmitting light through an inside thereof. Buffer layers made of an amorphous inorganic substance causing a brittle fracture are formed on bonding surfaces of a plurality of substrates having linear expansion coefficients different from one another, and the substrates to be bonded are stacked so that the buffer layers are faced to each other. Then, a heat treatment is performed for a stack, and thereby direct bonding via an atom is formed between the buffer layers.Type: ApplicationFiled: November 16, 2009Publication date: June 3, 2010Applicant: NIHON DEMPA KOGYO CO., LTD.Inventors: Kazumasa Adachi, Motoo Takada, Kozo Ono
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Patent number: 7572349Abstract: An optical device, such as an optical low-pass filter, and a production method therefor, which prevents damage, and thus maintains optical characteristics are provided. The optical device includes a plurality of optical plates joined together with adhesive. The adhesive is spread to extend to the peripheral edge of the optical plates and to the outer periphery of the principal plane surrounding the plurality of optical plates, thus forming a protective coating.Type: GrantFiled: June 5, 2008Date of Patent: August 11, 2009Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Motoo Takada, Ryoichi Koseki, Kazuya Takahashi, Yoshimitsu Iizuka
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Publication number: 20090153971Abstract: Optical multilayer thin-film filters (OMTFFs) are disclosed. An exemplary filter includes a transparent substrate, a multilayer film (MF) on a surface of the substrate, and a top layer. The MF is of alternatingly laminated layers of a high-refractive-index (HRI) material and a low-refractive-index (LRI) material. The top layer is on an uppermost layer of the MF and is of a material having atoms of lower atomic weight than atoms of either the HRI or LRI materials. The OMTFFs are made in a vacuum environment by alternatingly laminating respective thin films of the HRI and LRI materials on the substrate. The top layer is formed on the MF. Between forming the MF and top layer is a suppression step in which the newly formed MF is exposed to moisture by briefly venting the vacuum to atmosphere. The moisture inhibits migration of the low-molecular-weight atoms into the HRI and LRI materials.Type: ApplicationFiled: December 8, 2008Publication date: June 18, 2009Inventors: Motoo Takada, Shinya Kikegawa, Toshimasa Nishi, Hiroto Ishikawa
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Publication number: 20080305314Abstract: Optical thin-film-forming methods are disclosed that form optical thin film on a base plate arranged in a vacuum chamber. An exemplary method includes the steps of retaining the base plates on a plurality of retaining frames of a base-plate retainer, heating the base plate, and emitting a deposition material from a deposition source. The retaining frames are configured to make the entire base plate uniformly heated.Type: ApplicationFiled: June 4, 2008Publication date: December 11, 2008Inventors: Shinya Kikegawa, Toshimasa Nishi, Motoo Takada
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Publication number: 20080245473Abstract: An optical device, such as an optical low-pass filter, and a production method therefor, which prevents damage, and thus maintains optical characteristics are provided. The optical device includes a plurality of optical plates joined together with adhesive. The adhesive is spread to extend to the peripheral edge of the optical plates and to the outer periphery of the principal plane surrounding the plurality of optical plates, thus forming a protective coating.Type: ApplicationFiled: June 5, 2008Publication date: October 9, 2008Inventors: Motoo Takada, Ryoichi Koseki, Kazuya Takahashi, Yoshimitsu Iizuka
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Patent number: 7399512Abstract: An optical device, such as an optical low-pass filter, and a production method therefor, which prevents damage, and thus maintains optical characteristics are provided. The optical device includes a plurality of optical plates joined together with adhesive. The adhesive is spread to extend to the peripheral edge of the optical plates and to the outer periphery of the principal plane surrounding the plurality of optical plates, thus forming a protective coating.Type: GrantFiled: July 12, 2004Date of Patent: July 15, 2008Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Motoo Takada, Ryoichi Koseki, Kazuya Takahashi, Yoshimitsu Iizuka
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Publication number: 20080149510Abstract: An objective of the present invention is to provide a shipping tray for optical elements that prevents toppling of optical elements during transportation and optimally maintains the optical characteristics of the optical elements. In a shipping tray for optical elements, single edges of a plurality of optical elements, each having two main surfaces formed as horizontal flat surfaces, are sequentially disposed upright in the lateral and longitudinal directions on an adhesive tape provided on a base surface of a main container; and the plurality of optical elements is covered with a cover in which is formed a plurality of concavities for individually accommodating the plurality of optical elements. Each concavity in the cover has an aperture portion provided in a plateau portion thereof, into which is inserted one of the optical elements upright with the free edge side protruding therefrom, and the shape of the aperture portion is oval.Type: ApplicationFiled: December 20, 2007Publication date: June 26, 2008Applicant: Nihon Dempa Kogyo Co., Ltd.Inventors: Motoo Takada, Ryoichi Koseki
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Patent number: 7166487Abstract: A first objective of the present invention is to provide a more productive method of manufacturing optical devices that minimizes processing distortion, maintains optical characteristics satisfactorily, and promotes smallness. A second objective thereof is to provide a method of manufacturing optical devices that prevents the occurrence of fine dust and maintains the optical characteristics satisfactorily. A third objective thereof is to provide a method of manufacturing optical devices of a multi-layer configuration that are obtained by applying a scribing/cutting method.Type: GrantFiled: November 8, 2004Date of Patent: January 23, 2007Assignee: Nihon Dempa Kogyo Co., Ltd.Inventors: Motoo Takada, Kazumasa Adachi
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Publication number: 20050170084Abstract: A first objective of the present invention is to provide a more productive method of manufacturing optical devices that minimizes processing distortion, maintains optical characteristics satisfactorily, and promotes smallness. A second objective thereof is to provide a method of manufacturing optical devices that prevents the occurrence of fine dust and maintains the optical characteristics satisfactorily. A third objective thereof is to provide a method of manufacturing optical devices of a multi-layer configuration that are obtained by applying a scribing/cutting method.Type: ApplicationFiled: November 8, 2004Publication date: August 4, 2005Inventors: Motoo Takada, Kazumasa Adachi
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Publication number: 20050014077Abstract: The invention relates to an optical device such as an optical low-pass filter, and a production method therefor, which prevents damage, and thus maintains optical characteristics. In the optical device of the invention, a plurality of optical plates are stuck together with adhesive. The adhesive is spread to span to the side face or the outer periphery of the principal plane surrounding the plurality of optical plates, to thereby form a protective coat. Moreover the production method for an optical device, for example an optical low-pass filter, of the invention, where a plurality of optical plates are stuck together with adhesive, involves; spreading an adhesive between principal planes of the plurality of optical plates; pressing the plurality of optical plates from both principal planes to overflow the adhesive from between the both principal planes; and effusing and spreading the adhesive to span to the surrounding side face or periphery of the principal plane to thereby form a protective coat.Type: ApplicationFiled: July 12, 2004Publication date: January 20, 2005Inventors: Motoo Takada, Ryoichi Koseki, Kazuya Takahashi, Yoshimitsu Iizuka