公开(公告)号：US10393963B2

公开(公告)日：2019-08-27

申请号：US16273925

申请日：2019-02-12

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Naoyuki Kondou ,  Shinji Hashimoto ,  Toru Nakashiba ,  Shingo Maeda ,  Seiji Takagi

IPC: G02B6/132 ,  C08L63/08 ,  G02B1/10 ,  C08L63/00 ,  G02B6/122 ,  G02B6/12

Abstract: A composition for an optical waveguide is cured into a sheet to give a cured product. A difference in light transmittance with respect to light having a wavelength of 450 nm is 15% or less between this cured product and this cured product after retention in atmosphere at 175° C. for 40 hours, the light transmittance being calculated in terms of the cured product at a thickness of 50 μm.

公开(公告)号：US11680163B2

公开(公告)日：2023-06-20

申请号：US16755284

申请日：2018-10-11

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Junko Kurizoe ,  Naoyuki Kondou ,  Toru Nakashiba ,  Shingo Maeda

IPC: C08L63/00 ,  G02B1/04 ,  G02B6/122

CPC classification number: C08L63/00 ,  G02B1/046 ,  G02B6/1221 ,  C08L2203/20 ,  C08L2205/025

Abstract: Provided is a resin composition for optical waveguide cores, the resin composition including liquid epoxy resin, and solid epoxy resin, in which a coefficient of variation calculated from a weighted average value of a refractive index of the liquid epoxy resin and a refractive index of the solid epoxy resin is 2.10% or less.

公开(公告)号：US11378740B2

公开(公告)日：2022-07-05

申请号：US16759637

申请日：2018-11-09

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shingo Maeda ,  Naoyuki Kondou ,  Toru Nakashiba ,  Junko Kurizoe

IPC: G02B6/12 ,  G02B6/122 ,  G02B6/138 ,  G02B6/43 ,  H04B10/50

Abstract: An optical waveguide is provided and includes: a core forming layer with a high refractive index; and a first clad layer with a low refractive index, bonded to a first main surface of the core forming layer. The core forming layer is provided in its plane direction with a core portion, lateral clad portions each having one side adjacent to a corresponding side of the core portion, and high refractive index portions each adjacent to the other side of a corresponding one of the lateral clad portions. The core portion is provided in its plane direction with a central region, and GI regions in each of which a refractive index continuously decreases from the central region toward an interface with the corresponding one of the lateral clad portions. The lateral clad portions each include a region having a constant refractive index.

公开(公告)号：US10247883B2

公开(公告)日：2019-04-02

申请号：US15749525

申请日：2016-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Naoyuki Kondou ,  Shinji Hashimoto ,  Toru Nakashiba ,  Shingo Maeda ,  Seiji Takagi

IPC: G02B6/132 ,  C08L63/00 ,  G02B6/12 ,  C08L63/08 ,  G02B1/10 ,  G02B6/122

Abstract: A composition for an optical waveguide is cured into a sheet to give a cured product. A difference in light transmittance with respect to light having a wavelength of 450 nm is 15% or less between this cured product and this cured product after retention in atmosphere at 175° C. for 40 hours, the light transmittance being calculated in terms of the cured product at a thickness of 50 μm.