Meta optical device and electronic device including the same

Patent metadata

Field	Value
Publication number	US-12596204-B2
Application number	US-202318471825-A
Country	US
Kind code	B2
Filing date	Sep 21, 2023
Priority date	Sep 30, 2022
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A meta optical device for forming structured light by modulating incident light having a preset wavelength includes a plurality of supercells each including a plurality of nanostructures having a shape dimension less than the preset wavelength, and shapes and arrangements of the plurality of nanostructures are designed to form the structured light as a point pattern having a viewing angle greater than 160° in horizontal and vertical directions.

First claim

What is claimed is:

1 . A meta optical device for forming structured light by modulating incident light having a preset wavelength, the meta optical device comprising:
a plurality of supercells each including a plurality of nanostructures each having a shape dimension less than the preset wavelength, wherein shapes and arrangements of the plurality of nanostructures are configured to form the structured light of a point pattern having a viewing angle greater than 160° in horizontal and vertical directions, wherein the shapes and the arrangements of the plurality of nanostructures are designed such that a ratio of an intensity of an m th order diffraction light with respect to an intensity of a first order diffraction light is greater than 50%, and wherein, m denotes a largest number of integers less than (n*P/λ), n denotes a number of the nanostructures in each of the supercells, P denotes an arrangement pitch of the nanostructures in each of the supercells, and λ denotes the preset wavelength.

2 . The meta optical device of claim 1 , wherein
an arrangement pitch of the plurality of nanostructures is less than or equal to λ/2 (λ denotes the preset wavelength).

3 . The meta optical device of claim 1 , wherein
each of the plurality of nanostructures is shaped into a column having a cross-sectional surface defined by a major axis and a minor axis, and a direction of the major axis of each of the plurality of nanostructures is determined by a relative position of the nanostructure in each of the plurality of supercells.

4 . The meta optical device of claim 1 , further comprising
a support layer supporting the plurality of nanostructures.

5 . The meta optical device of claim 4 , wherein
each of the plurality of nanostructures includes a nanocomposite having a resin material and nanoparticles dispersed in the resin material.

6 . The meta optical device of claim 5 , wherein
the meta optical device is manufactured by using a soft mold having a reverse pattern of the shapes of the plurality of nanostructures.

7 . The meta optical device of claim 5 , wherein
the support layer includes a transparent plastic material having a curved shape.

8 . A meta optical device for forming structured light by modulating incident light having a preset wavelength, the meta optical device comprising:
a plurality of supercells each including a plurality of nanostructures each having a shape dimension less than the preset wavelength, wherein shapes and arrangements of the plurality of nanostructures are configured to form the structured light of a point pattern having a viewing angle greater than 160° in horizontal and vertical directions, wherein a phase profile generated by each of the plurality of supercells is represented as a second function that is obtained by an iterative Fourier transform of a first function defined in a spatial frequency domain, wherein the first function is defined to have a value of 1 within a circle with radius 1/λ and a value of 0 in a remaining space in the spatial frequency domain defined by (fx, fy) satisfying conditions 1/(2P)≤fx≤1/(2P), 1/(2P)≤fy≤1/(2P), and wherein P denotes an arrangement pitch of the nanostructures and λ denotes the preset wavelength.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Rho Junsuk
• Kim Gyeongtae
• Kim Yeseul
• Yun Jooyeong
• Kim Inki

Classifications

• G06T2207/10028

  Range image; Depth image; 3D point clouds · CPC title

• G02B27/0172

  characterised by optical features · CPC title

• G06T7/593

  from stereo images · CPC title

• G06T7/521

  from laser ranging, e.g. using interferometry; from the projection of structured light · CPC title

• G01B11/2513

  with several lines being projected in more than one direction, e.g. grids, patterns · CPC title