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    BIREFRINGENT SPECTRAL DEMULTIPLEXER FOR HYPERSPECTRAL IMAGING
    23.
    发明申请
    BIREFRINGENT SPECTRAL DEMULTIPLEXER FOR HYPERSPECTRAL IMAGING 审中-公开

    公开(公告)号：US20190384069A1

    公开(公告)日：2019-12-19

    申请号：US16443519

    申请日：2019-06-17

    Applicant: THE TRUSTEES OF DARTMOUTH COLLEGE

    Inventor： Jonathan D. Olson ,  Keith D. Paulsen ,  David W. Roberts

    IPC: G02B27/28 ,  G02B5/20 ,  H04N5/33 ,  H04N5/225

    Abstract: A birefringent spectral demultiplexer for hyperspectral imaging includes N birefringent beamsplitting stages arranged along a light propagation path, to produce 2N mutually divergent output light beams. Each of the output light beams differs from every other one of the output light beams in polarization and/or spectral bandwidth. Each birefringent beamsplitting stage includes a retarder for modifying polarization of each light beam received by the birefringent beamsplitting stage, and a Wollaston prism for splitting each light beam into two orthogonally polarized and divergent light beams. The Wollaston prism has a beamsplitting interface arranged at an oblique angle to the light propagation path. The oblique angle of the beamsplitting interface of each Wollaston prism of the series, except for the first one, is smaller than the oblique angle of the beamsplitting interface of each preceding Wollaston prism. The demultiplexer may be configured to accept input light of any polarization.

    Structured-light imaging systems and methods for determining sub-diffuse scattering parameters
    24.
    发明授权
    Structured-light imaging systems and methods for determining sub-diffuse scattering parameters 有权

    公开(公告)号：US10463256B2

    公开(公告)日：2019-11-05

    申请号：US15013623

    申请日：2016-02-02

    Applicant: The Trustees of Dartmouth College

    Inventor： Stephen Chad Kanick ,  Brian William Pogue ,  Keith D. Paulsen ,  Jonathan T. Elliott ,  David M. McClatchy, III ,  Venkataramanan Krishnaswamy

    IPC: A61B5/00

    Abstract: A method for determining sub-diffuse scattering parameters of a material includes illuminating the material with structured light and imaging remission by the material of the structured light. The method further includes determining, from captured remission images, sub-diffuse scattering parameters of the material. A structured-light imaging system for determining sub-diffuse scattering parameters of a material includes a structured-light illuminator, for illuminating the material with structured light of periodic spatial structure, and a camera for capturing images of the remission of the structured light by the material. The structured-light imaging system further includes an analysis module for processing the images to quantitatively determine the sub-diffuse scattering parameters. A software product includes machine-readable instructions for analyzing images of remission of structured light by a material to determine sub-diffuse scattering parameters of the material.

    3d scanning laser systems and methods for determining surface geometry of an immersed object in a transparent cylindrical glass tank
    25.
    发明授权
    3d scanning laser systems and methods for determining surface geometry of an immersed object in a transparent cylindrical glass tank 有权
    3d扫描激光系统和用于确定透明圆柱形玻璃罐中浸没物体的表面几何形状的方法

    公开(公告)号：US09532029B2

    公开(公告)日：2016-12-27

    申请号：US13726050

    申请日：2012-12-22

    Applicant: The Trustees of Dartmouth College

    Inventor： Matthew Pallone ,  Paul M. Meaney ,  Keith D. Paulsen

    IPC: H04N13/02 ,  A61B5/00 ,  A61B5/05 ,  A61B5/107 ,  G06T15/06 ,  G06T17/00 ,  G06T1/00 ,  G06T5/00 ,  G06T7/00

    CPC classification number: A61B5/0091 ,  A61B5/0507 ,  A61B5/1077 ,  A61B5/4312 ,  G06T1/0007 ,  G06T5/006 ,  G06T7/521 ,  G06T15/06 ,  G06T17/00 ,  G06T2210/41 ,  H04N13/221

    Abstract: Systems and methods generate a 3D model of a surface of an object immersed in a transparent liquid within a stationary cylindrical transparent tank. First and second laser line projectors and a camera are rotated around a central axis of the cylindrical tank. The first and second laser line projectors each generate a laser line perpendicular to a plane or rotation and aligned with the center of rotation. The camera images the object. An image from the camera is captured at each of several angular positions of the camera relative to a reference position of the stationary cylindrical tank. The captured images are processed to determine, for each laser line within each image, a plurality of 3D positions where the laser line is incident upon a surface of the object. In embodiments, images are corrected with ray tracing or image warping and registration functions.

    Abstract translation: 系统和方法产生浸在固定圆柱形透明罐内的透明液体中的物体表面的3D模型。 第一和第二激光线投影机和照相机围绕圆筒形罐的中心轴旋转。 第一和第二激光线投影仪各自产生垂直于平面或旋转并与旋转中心对准的激光线。 相机拍摄对象。 摄像机的图像相对于固定圆筒形罐的参考位置被捕获在摄像机的几个角度位置的每一个处。 对捕获的图像进行处理，以确定每个图像内的每个激光线，其中激光线入射到物体的表面上的多个3D位置。 在实施例中，利用光线跟踪或图像翘曲和注册功能校正图像。

    System and method for forming a cavity in soft tissue and bone
    28.
    发明授权
    System and method for forming a cavity in soft tissue and bone 有权

    公开(公告)号：US12256948B1

    公开(公告)日：2025-03-25

    申请号：US16504185

    申请日：2019-07-05

    Applicant: Mary Hitchcock Memorial Hospital, for itself and on behalf of Dartmouth-Hitchcock Clinic ,  The Trustees of Dartmouth College

    Inventor： Sohail K. Mirza ,  Keith D. Paulsen ,  Ryan J. Halter

    IPC: A61B17/16

    Abstract: A system and method for creating a cavity with a drill assembly provides a powered drill shaft assembly having an articulating tip and a position sensor along the drill shaft; a drill motor assembly with a rotational motor, linear actuator, torque sensor, rotation sensor, electrical resistance sensor and a controller unit having a plurality of programs providing user interface and controlling the operation of the powered drill arrangement; a shroud for the drill shaft with a water port; and a computer software package that combines user specifications with sensor data to control activation and displacement of the drill with a user interface, controls the motor for rotational speed and drilling depth, and gives sensor status, and a display displaying status of a drilling procedure and an image from an imaging device, and that is programmable for a set of parameters for a drilling procedure.

    Method and apparatus for quantitative hyperspectral fluorescence and reflectance imaging for surgical guidance
    30.
    发明授权
    Method and apparatus for quantitative hyperspectral fluorescence and reflectance imaging for surgical guidance 有权

    公开(公告)号：US12061328B2

    公开(公告)日：2024-08-13

    申请号：US18144767

    申请日：2023-05-08

    Applicant: THE TRUSTEES OF DARTMOUTH COLLEGE

    Inventor： Pablo A. Valdes ,  David W. Roberts ,  Keith D. Paulsen ,  Frederic Leblond

    IPC: G02B21/06 ,  A61B1/06 ,  G02B21/36

    CPC classification number: G02B21/06 ,  A61B1/063 ,  G02B21/36

    Abstract: An imaging system includes an illumination device for illuminating a target. A surgical microscope receives light from the target, the surgical microscope comprising at least one optical output port at which at least a portion of the received light is provided as an output from the surgical microscope. A tunable filter receives the portion of the received light provided as the output from the surgical microscope, the tunable filter being tunable to pass a filtered portion of the received light, the filtered portion of the received light having a plurality of wavelengths selected by the tunable filter and provided as output from the tunable filter. A high-resolution, broad-bandwidth electronic camera receives the light of a plurality of wavelengths selected by the tunable filter, the electronic camera converting the light of a plurality of wavelengths selected by the tunable filter to a plurality of electrical signals. A processor processes the plurality of electrical signals to form an image of the target.

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