Abstract: Disclosed herein systems and methods of performing spoof resistant object recognition. In certain embodiments, a system for object recognition includes: an illumination device configured to illuminate an object; a sensor device, wherein the sensor device receives illumination light reflected off the object which includes polarization information; a processor; memory including programming executable by the processor to: calculate the polarization information from the illumination light; use the polarization information to determine whether the object is a real 3D object. It has been discovered that polarization information may be utilized to determine whether an object is a 3D object or a flat (2D) object. Thus, the polarization information may be utilized to differentiate from an image of a 3D object and a photograph of an object.

Abstract: Hybrid imaging systems incorporating conventional optical elements and metasurface elements with light sources and/or detectors, and methods of the manufacture and operation of such optical arrangements are provided. Systems and methods describe the integration of apertures with metasurface elements and refractive optics with metasurface elements in illumination sources and sensors.

Abstract: Disclosed herein are single element dot pattern projectors with a meta-optics. The projectors include a laser light source and a metasurface chip integrated onto the laser light source. The metasurface chip includes metasurface elements spaced apart from the laser light source by a distance equal to the collimating function focal length of the metasurface chip. the laser light source produces light which is diffracted through the metasurface elements to produce a dot pattern. Projectors enabled by meta-optics lead to unique methods of integrating the meta-optic and unique functionality that can be added to the dot pattern.

Abstract: Disclosed herein are single element dot pattern projectors with a meta-optics. The projectors include a laser light source and a metasurface chip integrated onto the laser light source. The metasurface chip includes metasurface elements spaced apart from the laser light source by a distance equal to the collimating function focal length of the metasurface chip. the laser light source produces light which is diffracted through the metasurface elements to produce a dot pattern. Projectors enabled by meta-optics lead to unique methods of integrating the meta-optic and unique functionality that can be added to the dot pattern.

Abstract: Systems and methods for performing multi-frame imaging are illustrated. One embodiment includes a method of performing biometric identification. The method captures an “off” and “on” set of frames. The “off” set of frames depicts an object when illuminated by externally-sourced illumination. The “on” set of frames depicts the object when illuminated by the externally-sourced illumination and an illuminator. The “off” and “on” set of frames are each polarized in a set of near-infrared wavelengths. The method performs an image enhancing technique to produce a denoised image. The image enhancing technique includes a multi-frame noise reduction technique based on a plurality of spatial aspects of image signals in both of: the “off” set of frames; and the “on” set of frames. The image enhancing technique removes the externally-sourced illumination from the “on” set of frames in producing the denoised image. The method performs an authentication based on the denoised image.

Abstract: Hybrid imaging systems incorporating conventional optical elements and metasurface elements with light sources and/or detectors, and methods of the manufacture and operation of such optical arrangements are provided. Systems and methods describe the integration of apertures with metasurface elements and refractive optics with metasurface elements in illumination sources and sensors.

Abstract: Disclosed herein are systems and methods including polarization sorting metasurface microlens array devices. In certain embodiments, a polarization imaging device is provided. The polarization imaging device includes: a source of image light; a metasurface lenslet array comprising a plurality of repeating metasurface lenslets, where the plurality of repeating metasurface lenslets comprise a plurality of first metasurface lenslets configured to diffract the image light into a first polarization light in a first direction and a second polarization light in a second direction; an image sensor positioned in the optical path of the first polarization light and the second polarization light, and where the image sensor includes a plurality of image sensing units including a first image sensing unit positioned to sense the first polarization light and a second image sensing unit positioned to sense the second polarization light.

Abstract: An optical device comprises a metasurface including a plurality of nanostructures. The nanostructures convert an input light of an arbitrary spin state into an output light of an arbitrary total angular momentum state characterized by a superposition of two independent orbital angular momentum (OAM) states.

Abstract: Disclosed herein are systems and methods including polarization sorting metasurface microlens array devices. In certain embodiments, a polarization imaging device is provided. The polarization imaging device includes: a source of image light; a metasurface lenslet array comprising a plurality of repeating metasurface lenslets, where the plurality of repeating metasurface lenslets comprise a plurality of first metasurface lenslets configured to diffract the image light into a first polarization light in a first direction and a second polarization light in a second direction; an image sensor positioned in the optical path of the first polarization light and the second polarization light, and where the image sensor includes a plurality of image sensing units including a first image sensing unit positioned to sense the first polarization light and a second image sensing unit positioned to sense the second polarization light.

Abstract: An optical device comprises a metasurface including a plurality of nanostructures. The nanostructures convert an input light of an arbitrary spin state into an output light of an arbitrary total angular momentum state characterized by a superposition of two independent orbital angular momentum (OAM) states.

Abstract: Hybrid imaging systems incorporating conventional optical elements and metasurface elements with light sources and/or detectors, and methods of the manufacture and operation of such optical arrangements are provided. Systems and methods describe the integration of apertures with metasurface elements and refractive optics with metasurface elements in illumination sources and sensors.

Abstract: Disclosed herein are systems and methods including polarization sorting metasurface microlens array devices. In certain embodiments, a polarization imaging device is provided. The polarization imaging device includes: a source of image light; a metasurface lenslet array comprising a plurality of repeating metasurface lenslets, where the plurality of repeating metasurface lenslets comprise a plurality of first metasurface lenslets configured to diffract the image light into a first polarization light in a first direction and a second polarization light in a second direction; an image sensor positioned in the optical path of the first polarization light and the second polarization light, and where the image sensor includes a plurality of image sensing units including a first image sensing unit positioned to sense the first polarization light and a second image sensing unit positioned to sense the second polarization light.

Abstract: Hybrid imaging systems incorporating conventional optical elements and metasurface elements with light sources and/or detectors, and methods of the manufacture and operation of such optical arrangements are provided. Systems and methods describe the integration of apertures with metasurface elements and refractive optics with metasurface elements in illumination sources and sensors.

Abstract: Disclosed herein are systems and methods including polarization sorting metasurface microlens array devices. In certain embodiments, a polarization imaging device is provided. The polarization imaging device includes: a source of image light; a metasurface lenslet array comprising a plurality of repeating metasurface lenslets, where the plurality of repeating metasurface lenslets comprise a plurality of first metasurface lenslets configured to diffract the image light into a first polarization light in a first direction and a second polarization light in a second direction; an image sensor positioned in the optical path of the first polarization light and the second polarization light, and where the image sensor includes a plurality of image sensing units including a first image sensing unit positioned to sense the first polarization light and a second image sensing unit positioned to sense the second polarization light.

Abstract: A method of fabricating a visible spectrum optical component includes: providing a substrate; forming a resist layer over a surface of the substrate; patterning the resist layer to form a patterned resist layer defining openings exposing portions of the surface of the substrate; performing deposition to form a dielectric film over the patterned resist layer and over the exposed portions of the surface of the substrate, wherein a top surface of the dielectric film is above a top surface of the patterned resist layer; removing a top portion of the dielectric film to expose the top surface of the patterned resist layer and top surfaces of dielectric units within the openings of the patterned resist layer; and removing the patterned resist layer to retain the dielectric units over the substrate.

Abstract: A method of fabricating a visible spectrum optical component includes: providing a substrate; forming a resist layer over a surface of the substrate; patterning the resist layer to form a patterned resist layer defining openings exposing portions of the surface of the substrate; performing deposition to form a dielectric film over the patterned resist layer and over the exposed portions of the surface of the substrate, wherein a top surface of the dielectric film is above a top surface of the patterned resist layer; removing a top portion of the dielectric film to expose the top surface of the patterned resist layer and top surfaces of dielectric units within the openings of the patterned resist layer; and removing the patterned resist layer to retain the dielectric units over the substrate.

Abstract: Disclosed herein are systems and methods including polarization sorting metasurface microlens array devices. In certain embodiments, a polarization imaging device is provided. The polarization imaging device includes: a source of image light; a metasurface lenslet array comprising a plurality of repeating metasurface lenslets, where the plurality of repeating metasurface lenslets comprise a plurality of first metasurface lenslets configured to diffract the image light into a first polarization light in a first direction and a second polarization light in a second direction; an image sensor positioned in the optical path of the first polarization light and the second polarization light, and where the image sensor includes a plurality of image sensing units including a first image sensing unit positioned to sense the first polarization light and a second image sensing unit positioned to sense the second polarization light.

Abstract: Disclosed herein systems and methods of performing spoof resistant object recognition. In certain embodiments, a system for object recognition includes: an illumination device configured to illuminate an object; a sensor device, wherein the sensor device receives illumination light reflected off the object which includes polarization information; a processor; memory including programming executable by the processor to: calculate the polarization information from the illumination light; use the polarization information to determine whether the object is a real 3D object. It has been discovered that polarization information may be utilized to determine whether an object is a 3D object or a flat (2D) object. Thus, the polarization information may be utilized to differentiate from an image of a 3D object and a photograph of an object.

Abstract: Disclosed herein are single element dot pattern projectors with a meta-optics. The projectors include a laser light source and a metasurface chip integrated onto the laser light source. The metasurface chip includes metasurface elements spaced apart from the laser light source by a distance equal to the collimating function focal length of the metasurface chip. the laser light source produces light which is diffracted through the metasurface elements to produce a dot pattern. Projectors enabled by meta-optics lead to unique methods of integrating the meta-optic and unique functionality that can be added to the dot pattern.

Abstract: A method of fabricating a visible spectrum optical component includes: providing a substrate; forming a resist layer over a surface of the substrate; patterning the resist layer to form a patterned resist layer defining openings exposing portions of the surface of the substrate; performing deposition to form a dielectric film over the patterned resist layer and over the exposed portions of the surface of the substrate, wherein a top surface of the dielectric film is above a top surface of the patterned resist layer; removing a top portion of the dielectric film to expose the top surface of the patterned resist layer and top surfaces of dielectric units within the openings of the patterned resist layer; and removing the patterned resist layer to retain the dielectric units over the substrate.