公开(公告)号：US20240210622A1

公开(公告)日：2024-06-27

申请号：US18598819

申请日：2024-03-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuki NAKAMURA ,  Yasuhisa INADA

IPC: G02B6/124 ,  G01S7/481 ,  G01S17/89 ,  G02B6/12 ,  G02F1/295

CPC classification number: G02B6/124 ,  G01S7/4817 ,  G01S17/89 ,  G02B6/12033 ,  G02F1/295 ,  G02B2006/12104 ,  G02F2201/302

Abstract: An optical device includes a first waveguide extending in a first direction and a second waveguide connected to the first waveguide. The second waveguide includes a first mirror, a second mirror, and an optical waveguide layer. At least either the first waveguide or the second waveguide has one or more gratings in a part of a connection region in which the first mirror, the second mirror, and the first waveguide overlap one another when seen from an angle parallel with a direction perpendicular to a first reflecting surface of the first mirror. The one or more gratings is at a distance that is longer than at least either a thickness of the first mirror or a thickness of the second mirror in the first direction from an end of the first mirror or the second mirror that is in the connection region.

公开(公告)号：US20240295638A1

公开(公告)日：2024-09-05

申请号：US18657328

申请日：2024-05-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuki NAKAMURA ,  Yasuhisa INADA ,  Taku HIRASAWA

IPC: G01S7/481 ,  G02B5/04 ,  G02B5/18 ,  G02F1/295

CPC classification number: G01S7/4817 ,  G02B5/04 ,  G02B5/1861 ,  G02F1/2955

Abstract: An optical device includes: a first mirror having a first reflecting surface extending in a first direction and a second direction perpendicular to the first direction; a second mirror having a second reflecting surface; an optical waveguide layer that is located between the first and second mirrors and propagates light in the first direction; and an optical element that is disposed on the first mirror and emits incident light in a direction different from an incident direction. The optical element emits (1) incident light entering from the optical waveguide layer through the first mirror in a direction whose first direction component is smaller than that of an incident direction of the incident light by refraction and/or diffraction or (2) incident light entering from the outside in a direction whose first direction component is larger than that of an incident direction by refraction and/or diffraction.