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Achromatized metasurface lens

A super-surface and achromatic technology, applied to TV system components, instruments, TVs, etc., can solve problems such as not allowing head-mounted displays

Active Publication Date: 2019-11-26
MICROSOFT TECH LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using conventional lenses does not allow the size of the HMD to drop below a certain threshold
Other optics such as cameras and projection units suffer from similar limitations when using traditional optics

Method used

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  • Achromatized metasurface lens
  • Achromatized metasurface lens
  • Achromatized metasurface lens

Examples

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Embodiment Construction

[0020] The present technique provides an achromatic metasurface lens capable of precisely modifying multiple wavelengths of light to dramatically reduce chromatic aberration. Optical metalenses are two-dimensional arrays of nanostructures, or nanoscatterers, that modify optical wavefronts with subwavelength spatial resolution. Optical metasurface lenses are beneficial in that they can be made almost perfectly flat and very thin. It also generally does not cause any spherical aberration when modifying light. However, existing metasurface lenses exhibit poor performance across multiple wavelengths of light, such as across the visible band from about 450 nm to 680 nm. Existing metasurfaces perform well for a single wavelength or a narrow band of wavelengths, but rapidly degrade for different wavelengths, resulting in chromatic aberration. Chromatic aberration is the effect produced by electromagnetic radiation of different wavelengths being refracted or modified through slightl...

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Abstract

An achromatized metasurface lens that includes a color filter array and a metasurface lens located proximate to the color filter array. The color filter array includes a plurality of color filter elements for different colors of light. The metasurface lens includes a corresponding plurality of subsets of nanostructures based on the color filter array. Each respective subset of nanostructures is optically aligned with a corresponding color filter element. For example, a subset of nanostructures configured to modify a particular color of light may be optically aligned with a color filter elementthat filters light of the same particular color. The achromatized metasurface lens may be incorporated into a display system, such as a head-mounted-display. The display system may also include a narrowband display source tuned to the color filter elements in the color filter array.

Description

Background technique [0001] Traditionally, focusing optics generally rely on glass lenses, which are based on the principle of refraction according to Snell's law. While the use of glass lenses has been optimized for many different uses, glass lenses may be too thick or bulky for some applications. One such application is the use in head mounted displays such as virtual reality or augmented reality headsets. Because the head-mounted display is attached to the user's head, it is generally desirable to have a compact and lightweight head-mounted display. However, using conventional lenses does not allow the size of the head-mounted display to drop below a certain threshold. Other optical components such as cameras and projection units suffer from similar limitations when using traditional optics. Contents of the invention [0002] The present technology relates to achromatic metalenses, display systems including achromatic metalenses, and methods for fabricating achromatic ...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02B27/01
CPCG02B1/002G02B27/017H04N23/57G02B1/00G02B5/201G02B27/0025G02B2207/101
Inventor B·冈特
Owner MICROSOFT TECH LICENSING LLC
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