公开(公告)号：US20220171101A1

公开(公告)日：2022-06-02

申请号：US17290220

申请日：2019-10-17

Applicant: National University Corporation YOKOHAMA National University

Inventor： Toshihiko BABA ,  Hiroshi ABE ,  Daichi AKIYAMA

IPC: G02B3/00 ,  G02B3/06 ,  G01S7/481 ,  G02B6/124

Abstract: A prism lens includes a prism lens body and at least one cylindrical lens. The prism lens body has a set of facing planes a mutual distance of which decreases or increases from one end to another end. The cylindrical lens is integral to at least one plane of the set of planes. The cylindrical lens is formed such that a cross section shape thereof at a plane perpendicular to a direction of a slope of a plane of the prism lens body having the cylindrical lens thereon with respect to the other plane of the set of planes has a certain curved shape to be convex against the plane having the cylindrical lens thereon.

公开(公告)号：US20200158833A1

公开(公告)日：2020-05-21

申请号：US16618073

申请日：2018-05-22

Applicant: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY

Inventor： Toshihiko BABA ,  Keisuke KONDO ,  Hiroshi ABE

IPC: G01S7/4863 ,  G01S17/06 ,  G01S17/89

Abstract: A light receiver array according to the present invention is constituted by array-aligning plural receivers having slow light waveguides of photonic crystals, and a LiDAR device according to the present invention is constituted by linearly arranging a light receiver array and a transmitter. An arranging relationship of plural receivers of the light receiver array is an array-like element formed by array-aligning plural receivers having the slow light waveguides of photonic crystals, and the array alignment is defined by alignment for defining a position relationship between the plural receivers constituting the light receiver array, and orientation for defining a direction of each receiver. A relationship p=λ/sin Δθr is satisfied between the alignment pitch p, wavelength λ of the reception light, and an arrival angle Δθr when a phase difference between reception lights received by waveguide ends of adjacent receivers is one wavelength. Such a constitution that the arrival angle Δθr is equal to a widening angle Δθt of radiation light suitable.