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Unconventional metasurface sparse aperture lens

A sparse aperture and metasurface technology, applied in lenses, instruments, optics, etc., can solve the problems of processing difficulty, increased processing time and material cost, and the inability of metasurface lenses to make large-aperture equipment, achieving small errors and phase differences. Accurate modulation, wide-ranging effects

Active Publication Date: 2021-06-29
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the increase of the area, the processing difficulty, processing time and material cost increase sharply, and the metasurface lens cannot realize the production of large-aperture devices.

Method used

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  • Unconventional metasurface sparse aperture lens
  • Unconventional metasurface sparse aperture lens
  • Unconventional metasurface sparse aperture lens

Examples

Experimental program
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Embodiment 1

[0025] See figure 1 As shown, the metasurface circular sparse aperture of the present invention is composed of a light-transmitting substrate and a metasurface microstructure unit. The light-transmitting base material is silicon dioxide, and the structural unit material of the metasurface is silicon. The metasurface microstructure units constitute sub-apertures of sparse apertures in four concentric sector ring regions. The four fan rings are located in the same circle, and the radians and generatrices are equal, and the polar coordinate azimuth intervals are equal. They are respectively located in the directions of 0°, 90°, 180° and 270° of the center. The inner radius r1 of the fan ring is 50um, the outer radius r2 is 250um, and the opening angle is θ=30°.

[0026] The metasurface microstructure unit is a hollow rectangular array, the side length of the rectangular array is L=0.3 μm, the period P=0.4 μm, and the height of the rectangle is H=0.7 μm. The hollow figure in t...

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Abstract

An unconventional metasurface sparse aperture lens is composed of a light-transmitting substrate and a metasurface microstructure layer. Metasurface microstructure units are distributed in the four sector ring areas to form sub-apertures of the sparse aperture. Incident light with specific wavelength can be focused by controlling parameters of the metasurface microstructure units. The metasurface structure of the metasurface sparse aperture lens is accurate in phase modulation, phase modulation from -pi to pi can be achieved, and the modulation interval is smaller than 0.3. And through a sparse aperture technology, the resolution imaging exceeding the size of a sub-aperture can be realized, the lens processing area is obviously reduced, the processing difficulty is reduced, and the process cost is reduced. The lens has a great application value in a microscopic imaging system.

Description

technical field [0001] The invention relates to an optical device, in particular to a metasurface sparse aperture lens. Background technique [0002] A metasurface is a special optical device that uses periodically arranged microstructures to modulate the parameters such as phase, amplitude, and polarization of incident light on a sub-wavelength scale, and can achieve functions such as focusing, shaping, splitting, and detection of beams. It has small size, light weight, high efficiency, etc., and is easy to integrate. However, with the increase of the area, the processing difficulty, processing time and material cost increase sharply, and the metasurface lens cannot realize the production of large-aperture devices. [0003] Sparse aperture technology is to increase the effective aperture of the optical element through the arrangement of multiple sub-apertures, which can effectively reduce the processing area of ​​the optical element, thereby realizing the large-aperture of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00G02B1/00
CPCG02B3/0037G02B1/002
Inventor 胡敬佩董延更张冲曾爱军黄惠杰
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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