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公开(公告)号：US12151433B2
公开(公告)日：2024-11-26
申请号：US17422632
申请日：2020-01-14
Inventor： Rongguang Liang
IPC: B29C64/277 , B29C64/135 , B29C64/182 , B29C64/273 , B33Y10/00 , B33Y30/00 , G02B19/00 , G02B26/08 , G02B27/14 , H01S3/11 , H01S3/16 , B29K83/00 , B29L11/00
Abstract: Methods, devices and systems that allow three-dimensional printing of material with high resolution are described. One example system includes a two-photon polymerization (TPP) subsystem including a first light source coupled to an optical fiber positioned to deliver a first laser light to a scanning optical device, and an optical projection subsystem comprising a second light source configured to provide a second light to a digital projection device. A dichroic mirror is positioned to receive light corresponding to the first and the second light source, and an objective lens positioned to provide illumination to a target material for 3D printing. The dichroic mirror is configured to allow light from one of the light sources to pass therethrough to the objective lens, and to allow light corresponding to the other light source to be reflected towards the objective lens to enable simultaneous illumination of the target material.
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公开(公告)号：US20240210158A1
公开(公告)日：2024-06-27
申请号：US18555423
申请日：2022-04-15
Inventor： Rongguang Liang
IPC: G01B9/02 , G01B9/02001 , G01B9/04 , G01B11/24 , G01B11/30
CPC classification number: G01B9/02087 , G01B9/02007 , G01B9/04 , G01B11/2441 , G01B11/30 , G01B2290/70
Abstract: Methods, devices and systems for measuring surface roughness and surface shape of an object are described. An example interferometric system includes a collimator and a first and a second light sources with different spectral ranges and different coherence lengths. The system selectively allows light from one of the light sources to reach the collimator, and also includes a beamsplitter, and a Mirau type microscope having an objective lens, a plate with a central reflective spot and a beamsplitter plate to produce a reference beam and a test beam. An imaging lens receives the test and reference beams that form a plurality of interferograms. A neural network receives two of the interferograms for measuring the surface shape and another two interferograms for measuring the surface roughness of the object. The interferometric systems have a compact form, making them suitable for on-machine measurements and other applications.
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公开(公告)号：US20230371885A1
公开(公告)日：2023-11-23
申请号：US18248479
申请日：2021-10-08
Inventor： Ross Uthoff , Rongguang Liang
IPC: A61B5/00
CPC classification number: A61B5/444 , A61B5/6898 , A61B5/0077 , A61B5/0075
Abstract: Methods, apparatus and systems that relate to a portable multispectral dermascope are described. An example dermascope includes light sources having different spectral contents and configured to illuminate an area of the skin and at least one imaging sensor configured to collect light that it receives from the area of the skin. The dermascope also includes a processor to control illumination provided by the light sources to the area of the skin and process information associated with received light from the area of the skin to produce images of the area of the skin. In the dermascope, illumination from the light sources is controlled to provide illumination in a plurality of distinct wavelengths or range of wavelengths that produce differing optical responses of the area of the skin. The described methods and devices can be used to identify skin conditions using a compact and convenient device, such as a mobile phone.
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4.发明公开公开(公告)号：US20230342959A1
公开(公告)日：2023-10-26
申请号：US18183005
申请日：2023-03-13
Inventor： Stanley Pau , Rongguang Liang
Abstract: Methods and systems are described that enable three-dimensional (3D) imaging of objects. One example system includes a light source that produces multiple light beams having specific spectral content and polarization states. The system also includes phase masks that modify the intensity or phase of the light, and projection optics that allow simultaneously projection of at least three fringe patterns onto an object having particular phase, polarization and spectral characteristics. The detection system includes a camera that simultaneously receives light associated with the at the fringe patterns upon reflection from the object, and a processing unit coupled to the camera unit that determines one or both of a phase or a depth information associated with the object. The system and associated methods can efficiency produce 2D images of the object and allow determination of characteristics such as surface profile. The disclosed systems and methods can be effectively implemented with moving objects.
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公开(公告)号：US20230068033A1
公开(公告)日：2023-03-02
申请号：US17904421
申请日：2021-02-18
Inventor： Rongguang Liang
Abstract: Single viewpoint panoramic imaging attachments for a colonoscope are disclosed that are compact in size and provide 360-degree side and rear-views in a single image. One panoramic attachment assembly includes a plurality of micro-imaging subsystems that are positioned around a central opening. Each micro-imaging subsystem includes a reflector to receive light that is reflected from a surrounding tissue, an imaging lens, and a detector to generate signals corresponding to one section of a panoramic image of the surrounding tissue. The micro-imaging subsystems are arranged to all have a common view point, and are configured to collectively form a full 360-degree image of the surrounding tissue.
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Patent Agency Ranking
公开(公告)号：US20230168075A1
公开(公告)日：2023-06-01
申请号：US17997473
申请日：2021-04-28
Inventor： Rongguang Liang
IPC: G01B9/02015 , G01B11/30 , G01B9/02 , G02B5/30 , G02B27/28
CPC classification number: G01B9/02027 , G01B9/0203 , G01B9/02041 , G01B11/30 , G02B5/3025 , G02B27/283 , G01B2290/70 , G02B5/08
Abstract: Systems, devices and methods for measuring surface roughness and surface shape of an optical element using a dual-mode interferometer are disclosed. The devices implement optical filters, with a compact form, that allows measurement of both surface characteristics without rearranging the system components. One example interferometric system includes a laser light source and a low coherence light source that alternatively provide light to a collimator, followed by a polarizer, and a polarizing beam splitter. The system further includes two optical filters, a quarter waveplate, two objectives and a reference optical component. Each light source produces a set of interferograms, where one set of interferograms is used to measure the surface shape and another set of interferograms is used to measure the surface roughness of the optical component.
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公开(公告)号：US11473975B2
公开(公告)日：2022-10-18
申请号：US17054735
申请日：2019-05-09
Inventor： Rongguang Liang
Abstract: Devices, systems and methods for use in confocal imaging systems are described that enable lateral and axial scans at high speeds and without a moving scanner while producing high quality images. One chromatic confocal optical head includes an illumination source, such as an addressable point source array, to provide a wide spectrum illumination including multiple wavelengths. The optical head also includes a beamsplitter to allow the light to be directed toward an object, to receive the reflected light from the object and to direct the reflected light toward a detector. The optical head further includes a pinhole mask that is positioned to receive the light that is reflected from the object after passing through the beamsplitter, and a dispersion element that is positioned to receive the light after passing through the pinhole mask, and to separate the light into multiple spectral components for reception by the detector.
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公开(公告)号：US20220088872A1
公开(公告)日：2022-03-24
申请号：US17422632
申请日：2020-01-14
Inventor： Rongguang Liang
IPC: B29C64/277 , G02B27/14 , G02B26/08 , H01S3/16 , H01S3/11 , G02B19/00 , B33Y10/00 , B33Y30/00 , B29C64/135 , B29C64/273 , B29C64/182
Abstract: Methods, devices and systems that allow three-dimensional printing of material with high resolution are described. One example system includes a two-photon polymerization (TPP) subsystem including a first light source coupled to an optical fiber positioned to deliver a first laser light to a scanning optical device, and an optical projection subsystem comprising a second light source configured to provide a second light to a digital projection device. A dichroic mirror is positioned to receive light corresponding to the first and the second light source, and an objective lens positioned to provide illumination to a target material for 3D printing. The dichroic mirror is configured to allow light from one of the light sources to pass therethrough to the objective lens, and to allow light corresponding to the other light source to be reflected towards the objective lens to enable simultaneous illumination of the target material.
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公开(公告)号：US20220011097A1
公开(公告)日：2022-01-13
申请号：US17294635
申请日：2019-11-18
Inventor： Rongguang Liang , Junchao Zhang , Xiaobo Tian , Jianbo Shao
Abstract: Methods, apparatus and systems for processing interferograms in metrology applications are described. In one example aspect, a method includes obtaining an input phase image based on the interferograms, segmenting the input phase image by classifying the input phase image into multiple regions based on the phase value and a location of each pixel, assigning an integer value to each of the multiple regions, and constructing an output phase image based on the input phase image and the phase offset of each of the multiple regions.
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10.发明申请公开(公告)号：US20210318550A1
公开(公告)日：2021-10-14
申请号：US17290163
申请日：2019-10-30
Inventor： Dae Wook Kim , Rongguang Liang , Oliver Spires
Abstract: A kinematically engaged yoke system (KEYS) for multiple-order-diffraction engineered material may comprise a harness comprising a frame and a plurality of semi-kinematic keys disposed on the frame, wherein the semi-kinematic keys are configured based on a MOD-side mechanical profile of a plurality of segments of a multiple-order-diffraction engineered material, and wherein the MOD-side mechanical profile, when engaged with the semi-kinematic keys, functions as a fiducial that provides alignment between neighboring segments; and one or more shims disposed between one or more pairs of neighboring segments of the plurality of segments of the multiple-order-diffraction engineered material, wherein the one or more shims facilitate alignment of the one or more pairs of neighboring segments of the plurality of segments based on a translation across one or more surfaces of the one or more shims.
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