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公开(公告)号：US20210306564A1
公开(公告)日：2021-09-30
申请号：US17209496
申请日：2021-03-23
发明人： Juejun Hu , Tian GU , Mikhail Shalaginov
摘要： Wide-angle optical functionality is beneficial for imaging and image projection devices. Conventionally, wide-angle operation is attained by a complicated assembly of optical elements. Recent advances have led to meta-surface lenses or meta-lenses, which are ultra-thin planar lenses with nanoantennas that control the phase, amplitude, and/or polarization of light. Here, we present a meta-lens capable of diffraction-limited focusing and imaging over an unprecedented >170° angular field of view (FOV). The lens is integrated on a one-piece flat substrate and includes an aperture on one side and a single meta-surface on the other side. The meta-surface corrects third-order Seidel aberrations, including coma, astigmatism, and field curvature. The meta-lens has a planar focal plane, which enables considerably simplified system architectures for imaging and projection. The meta-lens design is generic and can be readily adapted to different meta-atom geometries and wavelength ranges to meet diverse application demands.
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公开(公告)号：US20180140172A1
公开(公告)日：2018-05-24
申请号：US15873203
申请日：2018-01-17
CPC分类号： A61B1/042 , A61B1/0669 , A61B1/0684 , A61B1/07 , A61N5/0622 , A61N2005/063 , A61N2005/0652 , G02B6/0038 , G02B6/0048 , G02B6/005 , G02B6/0053 , G02B6/0078 , G02B23/2469 , G02B23/26
摘要： A multi-channel optical imaging and stimulation system includes a light source to deliver light beams into a light guide. Different light beams are coupled into different spatial modes supported by the light guide. The light guide includes multiple segments, each of which defines a window to couple a specified group of spatial modes out of the light guide to illuminate or stimulate a target. Light reflected, scattered, or emitted by the target is also collected by the windows in the light guide. The light collected by different windows is detected by different pixels of a detector, thereby creating a correspondence between the pixel location and the spatial location of site at which the light is collected. An image of the target is then reconstructed based on this correspondence.
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公开(公告)号：US20230393357A1
公开(公告)日：2023-12-07
申请号：US18329059
申请日：2023-06-05
发明人： Luigi Ranno , Tian GU , Juejun Hu
CPC分类号： G02B6/43 , G02B6/4219
摘要： The present technology is related to optics and optical systems, particularly to photonic packaging, optical coupling, optical interconnects, micro-optics, and their fabrication. The present technology includes free-form micro-optical coupler architectures and systems with superb optical performance and a high-throughput method of fabricating large-area coupler arrays for scalable manufacturing. Embodiments include chip-to-fiber-array, chip-to-chip, chip-to-interposer, and chip-to-free-space couplers for applications including photonic packaging, optical communications, LiDAR, optical trapping and manipulation, augmented reality, virtual reality, and sensing.
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公开(公告)号：US20220110522A1
公开(公告)日：2022-04-14
申请号：US17556884
申请日：2021-12-20
发明人： Juejun Hu , Tian GU , Mikhail Shalaginov , Fan YANG
摘要： Meta-lens based ocular imaging, near-eye display, and eye-tracking systems are described. The systems can include a single focusing optic and an integrated circuit that provides illumination light and includes an imaging array. The focusing optic includes meta-atoms formed on a substrate. The systems may have no moving parts and achieve imaging or image-projection fields-of-view approaching or exceeding 180 degrees. Because of their low part count, the systems can be robust and have a very small form factor.
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公开(公告)号：US20200285083A1
公开(公告)日：2020-09-10
申请号：US16826489
申请日：2020-03-23
发明人： Zhuoran FANG , Tian GU , Juejun Hu , Junying LI , Yifei ZHANG
摘要： An alloy of GexSbySezTem includes atoms of Ge, Sb, Se, and Te that form a crystalline structure having a plurality of vacancies randomly distributed in the crystalline structure. The alloy can be used to construct an optical device including a first waveguide to guide a light beam and a modulation layer disposed on the first waveguide. The modulation includes the alloy of GexSbySezTem which has a first refractive index n1 in an amorphous state and a second refractive index n2, greater than the first refractive index by at least 1, in a crystalline state. The first waveguide and the modulation layer are configured to guide about 1% to about 50% of the light beam in the modulation layer when the alloy is in the amorphous state and guide no optical mode when the alloy is in the crystalline state.
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公开(公告)号：US20240122473A1
公开(公告)日：2024-04-18
申请号：US18540256
申请日：2023-12-14
发明人： Juejun Hu , Tian GU , Mikhail Shalaginov , Fan YANG
CPC分类号： A61B3/14 , A61B3/12 , G02B1/002 , G02B27/0093 , G02B27/0172 , G06F3/013 , A61B3/113
摘要： Meta-lens based ocular imaging, near-eye display, and eye-tracking systems are described. The systems can include a single focusing optic and an integrated circuit that provides illumination light and includes an imaging array. The focusing optic includes meta-atoms formed on a substrate. The systems may have no moving parts and achieve imaging or image-projection fields-of-view approaching or exceeding 180 degrees. Because of their low part count, the systems can be robust and have a very small form factor.
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公开(公告)号：US20180284492A1
公开(公告)日：2018-10-04
申请号：US15941879
申请日：2018-03-30
发明人： Zhuoran FANG , Tian GU , Juejun HU , Junying LI , Yifei ZHANG
摘要： An alloy of GexSbySezTem includes atoms of Ge, Sb, Se, and Te that form a crystalline structure having a plurality of vacancies randomly distributed in the crystalline structure. The alloy can be used to construct an optical device including a first waveguide to guide a light beam and a modulation layer disposed on the first waveguide. The modulation includes the alloy of GexSbySezTem which has a first refractive index n1 in an amorphous state and a second refractive index n2, greater than the first refractive index by at least 1, in a crystalline state. The first waveguide and the modulation layer are configured to guide about 1% to about 50% of the light beam in the modulation layer when the alloy is in the amorphous state and guide no optical mode when the alloy is in the crystalline state.
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公开(公告)号：US20210025756A1
公开(公告)日：2021-01-28
申请号：US16928197
申请日：2020-07-14
发明人： Tian GU , Derek Kita , Juejun HU
摘要： State-of-the-art portable Raman spectrometers use discrete free-space optical components that must be aligned well and that don't tolerate vibrations well. Conversely, the inventive spectrometers are made with monolithic photonic integration to fabricate some or all optical components on one or more planar substrates. Photonic integration enables dense integration of components, eliminates manual alignment and individual component assembly, and yields superior mechanical stability and resistance to shock or vibration. These features make inventive spectrometers especially suitable for use in high-performance portable or wearable sensors. They also yield significant performance advantages, including a large (e.g., 10,000-fold) increase in Raman scattering efficiency resulting from on-chip interaction of the tightly localized optical mode and the analyte and a large enhancement in spectral resolution and sensitivity resulting from the integration of an on-chip Fourier-transform spectrometer.
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