US 12,326,539 B2
Meta-optical device for collimating and deflecting light beam
Po-Sung Kao, Taichung (TW)
Assigned to Wuyun Co., Inc., Taichung (TW)
Filed by Wuyun Co., Inc., Taichung (TW)
Filed on Dec. 29, 2021, as Appl. No. 17/564,982.
Claims priority of application No. 110126860 (TW), filed on Jul. 21, 2021.
Prior Publication US 2023/0021930 A1, Jan. 26, 2023
Int. Cl. G02B 1/00 (2006.01); G02B 27/30 (2006.01)
CPC G02B 1/002 (2013.01) [G02B 27/30 (2013.01); G02B 2207/101 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A meta-optical device for collimating and deflecting a light beam, comprising:
a substrate assembly having a substrate assembly surface that extends in an X-Y plane defined by an X-axis extending in an X-axis direction and a Y-axis extending in a Y-axis direction, wherein the X-direction and the Y-direction are perpendicular to each other; and
N number of meta-optical arrays that are formed on said substrate assembly surface and that are disposed to receive N number of light beams, respectively, wherein N is a positive integer not smaller than two, and each of said meta-optical arrays includes a plurality of nanostructures that are arranged in an array and that extend in a Z-direction in which a Z-axis extends and which is perpendicular to said substrate assembly surface;
wherein for an nth meta-optical array that is an nth one of said meta-optical arrays, that is disposed to receive an nth light beam which is an nth one of the light beams and that manipulates the nth light beam into an nth imaging light beam, an origin of said nth meta-optical array is defined to be an intersection of an optical axis of the nth light beam and said nth meta-optical array, and each of said nanostructures thereof is configured to have a parameter ΔΦn(xn>yn) relating to:

OG Complex Work Unit Math
where n is a variable that takes on a positive integer value ranging from 1 to N, xn represents a distance between said nanostructure and the origin of said nth meta-optical array in the X-direction, yn represents a distance between said nanostructure and the origin of said nth meta-optical array in the Y-direction, Δφn(xn, yn) represents a difference between a phase shift to be induced on the nth light beam by said nanostructure and a phase shift to be induced on the nth light beam by one of said nanostructures that is located at the origin of said nth meta-optical array, λn represents an operating wavelength of the nth light beam, fn represents a focal length of said nth meta-optical array, θn represents an angle between the X-axis and a projection of the nth imaging light beam on the X-Y plane, and γn represents an angle between the Z-axis and the nth imaging light beam;
wherein the focal lengths of said N number of meta-optical arrays are different from each other, and the operating wavelengths of the N number of the light beams are different from each other; and
wherein the light beams are deflected onto a same position of a same plane after passing through a first to Nth meta-optical arrays, respectively.