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A multifunctional metalens array and optical system

An optical system and metalens technology, applied in the field of optics, can solve problems such as high price, high energy loss, and difficult integration

Active Publication Date: 2021-05-14
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, in the interference imaging system, in order to make the light meet the interference conditions, it is usually necessary to use multiple lenses and separate optical elements for light focusing and color separation. It will lead to difficult back-end integration, high energy consumption and high price

Method used

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  • A multifunctional metalens array and optical system
  • A multifunctional metalens array and optical system
  • A multifunctional metalens array and optical system

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Embodiment 1

[0037] see figure 1 and figure 2 ,in, figure 1 It is a schematic diagram of the multifunctional metalens unit 1 of the present invention to realize light focusing and light splitting. After the incident light passes through the multifunctional metalens with dispersion light splitting and focusing spectrum, color separation and focusing can be realized, so that the light meets the interference conditions without adding fiber waveguides And the rear end separates optical components.

[0038] Multifunctional metalens array 11, comprising n closely arranged metalens units 1 formed on the same substrate, n is a positive integer greater than 1, each metalens unit 1 has an off-axis Fresnel lens structure and a planar metalens structure, the planar metalens structure is used to focus the incident light waves, and the off-axis Fresnel lens structure is used to realize the splitting of light waves with different wavelengths. The planar metalens and off-axis Fresnel lenses are integra...

Embodiment 2

[0063] read on figure 1 and figure 2 , figure 2 It is a schematic diagram of the application of a multifunctional metalens array in an optical system, and the optical system includes a multifunctional metalens array 11, a photonic integrated circuit 2 and a detector array 3, and the multifunctional metalens array is the multifunctional metalens array proposed in Embodiment 1 11. The multifunctional metalens array 11 is used to collect light information to obtain target optical information. The incident light is divided into multiple narrow-band beams after passing through each metalens unit 1. The photonic integrated circuit 2 is used to focus and couple the narrow-band beams and process them. The phase adjustment makes the two beams of light of the same wavelength from different metalens units 1 become coherent light satisfying interference conditions, and the detector array 3 acquires coherent light information and performs image restoration to obtain a high-resolution im...

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Abstract

The invention relates to the field of optics, in particular to a metalens, in particular to a multifunctional metalens array and an optical system thereof. The multifunctional metalens array includes n closely arranged metalens units formed on the same substrate, n is a positive integer greater than 1, each of the metalens units has an off-axis Fresnel lens structure and a plane metalens structure, the planar metalens structure is used to focus incident light waves, and the off-axis Fresnel lens structure is used to realize light splitting of light waves with different wavelengths; the optical system includes a multifunctional metalens array, a photonic integrated circuit and a detector array . The present invention combines the off-axis Fresnel lens and the plane metalens together, and integrates the functions of the two, so that the light-splitting phase is introduced into the plane metalens, so that it can not only realize light wave focusing, but also realize light waves with different wavelengths. The light splitting constitutes a multifunctional metalens with dispersion light splitting and focusing spectrum.

Description

technical field [0001] The invention relates to the field of optics, in particular to a multifunctional metalens array and an optical system. Background technique [0002] A metalens is a diffractive optical element that enables far-field superdiffraction-limited focusing and imaging in pure optics. Compared with traditional optical lenses, planar metalens has the advantages of strong focusing ability, compact structure, flexible design, and convenient integration. The functions realized by metalens can surpass traditional lenses, and a piece of metalens can be used to replace the lens in traditional cameras. As an emerging technology that is expected to subvert traditional optics, metalens has huge potential applications in the miniaturization and weight reduction of optical systems. [0003] In recent years, the detection technology based on the principle of interference imaging has become a frontier research field in the world, and the metalens can play an important role...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/42G02B27/10
CPCG02B27/1006G02B27/4244
Inventor 王灵杰赵尚男刘涛张新闫磊
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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