公开(公告)号：US20230400607A1

公开(公告)日：2023-12-14

申请号：US18252495

申请日：2021-11-16

Applicant: KURARAY CO., LTD.

Inventor： Keisuke IKEDA ,  Atsushi UCHIDA ,  Masaru KARAI

IPC: G02B3/00 ,  G02B5/10

CPC classification number: G02B3/0056 ,  G02B5/10

Abstract: Lenses are arrayed in a lattice on an array surface of a microlens array. A lens has a convex surface that is cylindrical throughout sections that are parallel to a lattice direction of the lens and are orthogonal to the array surface. In each of meridians of the sections parallel to the lattice direction of the lens, a sag amount is corrected so as to increase an inclination of a skirt. In another aspect, a lens has a concave surface that is cylindrical throughout sections that are parallel to a lattice direction of the lens and are orthogonal to an array surface. In each of meridians of the sections parallel to the lattice direction of the lens, a sag amount is corrected so as to increase an inclination of a rim.

公开(公告)号：US20250096452A1

公开(公告)日：2025-03-20

申请号：US18729637

申请日：2023-01-17

Applicant: KURARAY CO., LTD.

Inventor： Keisuke IKEDA ,  Tatsuya SUNAMOTO ,  Minoru ONODERA

IPC: H01Q1/12

Abstract: An antenna system includes: a laminate including a plurality of high-frequency permeable layers; and an antenna circuit board including a high-frequency insulating layer. n-th layer of the plurality of high-frequency permeable layers has a thickness Ln within a range of Lnmin ±λ(10√εn). The n-th layer is at least one high-frequency permeable layer of the laminate. εn denotes a relative dielectric constant of the n-th layer; λ denotes a wavelength of the high-frequency wave that is incident on the laminate; and Lnmin denotes a thickness of the n-th layer where an intensity of a reflected wave from the laminate is minimized, the intensity being determined as an intensity of a composite wave of reflected waves from a front surface, a back surface, and joint interfaces of the laminate.

公开(公告)号：US20220128742A1

公开(公告)日：2022-04-28

申请号：US17424251

申请日：2020-01-21

Applicant: KURARAY CO., LTD.

Inventor： Keisuke IKEDA ,  Atsushi UCHIDA ,  Masaru KARAI

IPC: G02B5/02

Abstract: A transmission-type or reflection-type diffuser plate including a planar base material on which an optical element having an effective diameter of “a” in an X-axis direction and an effective diameter of “b” in a Y-axis direction is provided to constitute an a×b two-dimensional basic periodic structure, each of the basic periodic structure having an Na×Mb two-dimensional periodic phase structure in which a basic block has N rows and M columns including N optical elements in the X-axis direction and M optical elements in the Y-axis direction, the diffuser plate being configured such that if a phase structure Pnm in the n-th row and the m-th column is expressed by Pn1+P1m, and directivity is represented by square of the absolute value of Fourier transform of complex transmittance or complex reflectance of an optical element in the n-th row and the m-th column in the basic block; a ratio of standard deviation to average of the directivity is 0.3 or less.