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    X-ray imaging system incorporating pixelated X-ray source and synchronized detector
    1.
    发明授权
    X-ray imaging system incorporating pixelated X-ray source and synchronized detector 失效
    包含像素化X射线源和同步检测器的X射线成像系统

    公开(公告)号：US06674837B1

    公开(公告)日：2004-01-06

    申请号：US10172704

    申请日：2002-06-14

    Applicant: Nikhil R. Taskar ,  Rameshwar Nath Bhargava ,  Paul J. Patt

    Inventor： Nikhil R. Taskar ,  Rameshwar Nath Bhargava ,  Paul J. Patt

    IPC: H01J3500

    CPC classification number: A61B6/542 ,  A61B6/00 ,  A61B6/4028 ,  A61B6/4216 ,  A61B6/482 ,  G01T1/2928 ,  H01J2235/068 ,  Y10S977/928

    Abstract: An X-ray imaging system utilizing a pixelated X-ray source and a X-ray imaging detector operated synchronously. The imaging system may be used in industrial and medical applications. The X-ray source and X-ray detector are synchronized such that a corresponding area of the X-ray detector is activated when the corresponding area of the X-ray source is emitting X-rays. Synchronized and adaptive emission and detection of the X-rays results in scatter rejection, improved image quality, and optimum exposure and dose reduction.

    Abstract translation: 使用像素化X射线源的X射线成像系统和同步运行的X射线成像检测器。 成像系统可用于工业和医疗应用。 X射线源和X射线检测器被同步，使得当X射线源的相应区域发射X射线时，X射线检测器的相应区域被激活。 X射线的同步和自适应发射和检测导致散射抑制，改善的图像质量以及最佳的曝光和剂量降低。

    Composite nanophosphor screen for detecting radiation having optically reflective coatings
    2.
    发明授权
    Composite nanophosphor screen for detecting radiation having optically reflective coatings 失效
    用于检测具有光学反射涂层的辐射的复合纳米荧光屏

    公开(公告)号：US06300640B1

    公开(公告)日：2001-10-09

    申请号：US09197248

    申请日：1998-11-20

    Applicant: Rameshwar Nath Bhargava ,  Nikhil R. Taskar ,  Vishal Chhabra ,  John Victor D. Veliadis

    Inventor： Rameshwar Nath Bhargava ,  Nikhil R. Taskar ,  Vishal Chhabra ,  John Victor D. Veliadis

    IPC: G01T120

    CPC classification number: G01T1/20 ,  G21K2004/06 ,  G21K2004/12

    Abstract: A composite phosphor screen for converting radiation, such as X-rays, into visible light. The screen includes a planar surface, which can be formed from glass, silicon or metal, which has etched therein a multiplicity of closely spaced microchannels having diameters of the order of 10 microns or less. Deposited within each of the microchannels is a multiplicity of phosphors which emit light when acted upon by radiation. The walls of the microchannels and/or the substrate surfaces include light reflective coatings so as to reflect the light emitted by the phosphors to the light collecting devices, such as film or an electronic detector. The coatings can be either radiation transparent or filtering/attenuating depending on the particular application.

    Abstract translation: 用于将诸如X射线的辐射转换成可见光的复合荧光屏。 屏幕包括可以由玻璃，硅或金属形成的平坦表面，其在其中蚀刻了具有大约10微米或更小的直径的多个紧密间隔的微通道。 沉积在每个微通道内的是在辐射作用时发光的多种荧光体。 微通道和/或衬底表面的壁包括光反射涂层，以将由磷光体发射的光反射到诸如膜或电子检测器的光收集装置。 根据具体应用，涂层可以是辐射透明的或过滤/衰减的。

    Nanocrystalline based phosphors and photonic structures for solid state lighting
    3.
    发明授权
    Nanocrystalline based phosphors and photonic structures for solid state lighting 失效
    用于固态照明的纳米晶体荧光体和光子结构

    公开(公告)号：US06734465B1

    公开(公告)日：2004-05-11

    申请号：US10299410

    申请日：2002-11-19

    Applicant: Nikhil R. Taskar ,  Rameshwar Nath Bhargava

    Inventor： Nikhil R. Taskar ,  Rameshwar Nath Bhargava

    IPC: H01L2715

    CPC classification number: H01L33/502 ,  H01L33/44 ,  H01L33/54

    Abstract: A photonic structure for “white” light generation by phosphors under the excitation of a LED. The photonic structure mounts the LED and an optically transparent matrix having dispersed therein phosphors which will emit light under the excitation of the radiation of the LED. The transparent matrix may include nanoparticles for matching the index of refraction of the material of the matrix to that of the light generating phosphors. The matrix material may be readily formed by molding and formed into a variety of shapes including lenses for focusing the emitted light. A large number of the photonic structures may be arranged on a substrate to provide even illumination or other purposes. The phosphors dispersed in the matrix are preferably nanocrystalline.

    Abstract translation: 在LED的激发下由磷光体产生“白”光的光子结构。 光子结构安装LED和其中分散有荧光体的光学透明矩阵，其将在LED的辐射的激发下发光。 透明矩阵可以包括纳米粒子，用于将矩阵材料的折射率与发光荧光体的折射率进行匹配。 基质材料可以容易地通过模塑形成并形成为包括用于聚焦发射光的透镜的各种形状。 大量的光子结构可以被布置在基板上以提供均匀的照明或其它目的。 分散在基质中的磷光体优选是纳米晶体。

    High resolution high output microchannel based radiation sensor
    4.
    发明授权
    High resolution high output microchannel based radiation sensor 失效
    高分辨率高输出微通道辐射传感器

    公开(公告)号：US06534772B1

    公开(公告)日：2003-03-18

    申请号：US09688662

    申请日：2000-10-16

    Applicant: Vishal Chhabra ,  Rameshwar Nath Bhargava ,  Dennis Gallagher ,  Samuel P. Herko ,  Bharati S. Kulkarni ,  Nikhil R. Taskar ,  Aleksey Yekimov

    Inventor： Vishal Chhabra ,  Rameshwar Nath Bhargava ,  Dennis Gallagher ,  Samuel P. Herko ,  Bharati S. Kulkarni ,  Nikhil R. Taskar ,  Aleksey Yekimov

    IPC: G01T120

    CPC classification number: G21K4/00 ,  G01T1/20 ,  G01T1/2921 ,  G21K2004/06 ,  G21K2004/12 ,  H01J2231/50036 ,  H01J2231/5016 ,  Y10S977/89

    Abstract: A microchannel phosphor screen for converting radiation, such as X-rays, into visible light. The screen includes a planar surface, which can be formed from glass, silicon or metal, which has etched therein a multiplicity of closely spaced microchannels having diameters of the order of 40 microns or less. Deposited within each of the microchannels is a multiplicity of phosphors which emit light when acted upon by radiation. The dimensions of the microchannel and the phosphors and the relationship between the microchannels and the phosphors is optimized so that the light output compares favorably with lower resolution non microchannel based scintillation screens. A photomultiplier can be integrated with the X-ray detector so as to provide an enhanced output for use with low level X-ray of for cine or fluoroscopy applications.

    Abstract translation: 用于将诸如X射线的辐射转换成可见光的微通道荧光屏。 屏幕包括可以由玻璃，硅或金属形成的平坦表面，其在其中蚀刻了许多直径为40微米或更小的直径的紧密间隔的微通道。 沉积在每个微通道内的是在辐射作用时发光的多种荧光体。 微通道和磷光体的尺寸以及微通道和荧光体之间的关系被优化，使得光输出与较低分辨率的非微通道闪烁屏相比较。 光电倍增管可与X射线检测器集成，以提供增强的输出，用于电影或荧光透视应用的低电平X射线。

    Microchannel high resolution x-ray sensor having an integrated photomultiplier
    5.
    发明授权
    Microchannel high resolution x-ray sensor having an integrated photomultiplier 失效
    具有集成光电倍增管的微通道高分辨率x射线传感器

    公开(公告)号：US06452184B1

    公开(公告)日：2002-09-17

    申请号：US09385995

    申请日：1999-08-30

    Applicant: Nikhil R. Taskar ,  John Victor D. Veliadis ,  Vishal Chhabra ,  Bharail Kulkarni ,  Neeta Pandit ,  Rameshwar Nath Bhargava ,  Roger Delano

    Inventor： Nikhil R. Taskar ,  John Victor D. Veliadis ,  Vishal Chhabra ,  Bharail Kulkarni ,  Neeta Pandit ,  Rameshwar Nath Bhargava ,  Roger Delano

    IPC: G01T120

    CPC classification number: G01T1/20 ,  G21K2004/06 ,  G21K2004/12

    Abstract: A composite phosphor screen for converting radiation, such as X-rays, into visible light. The screen includes a planar surface, which can be formed from glass, silicon or metal, which has etched therein a multiplicity of closely spaced microchannels having diameters of the order of 10 microns or less. Deposited within each of the microchannels is a multiplicity of phosphors which emit light when acted upon by radiation. A photomultiplier, which may be microchannel based, is integrated with the X-ray detector so as to provide an enhanced output for use with low level X-ray of for cine or fluoroscopy applications. The walls of the microchannels and/or the substrate surfaces include dielectric stack based light reflective coatings.

    Abstract translation: 用于将诸如X射线的辐射转换成可见光的复合荧光屏。 屏幕包括可以由玻璃，硅或金属形成的平坦表面，其在其中蚀刻了具有大约10微米或更小的直径的多个紧密间隔的微通道。 沉积在每个微通道内的是在辐射作用时发光的多种荧光体。 可以将基于微通道的光电倍增管与X射线检测器集成，以提供用于电影或荧光透视应用的低水平X射线的增强输出。 微通道和/或衬底表面的壁包括基于电介质叠层的光反射涂层。

    Nanocomposite photonic structures for solid state lighting
    7.
    发明授权
    Nanocomposite photonic structures for solid state lighting 失效
    固态照明的纳米复合光子结构

    公开(公告)号：US07259400B1

    公开(公告)日：2007-08-21

    申请号：US10842399

    申请日：2004-05-10

    Applicant: Nikhil R. Taskar

    Inventor： Nikhil R. Taskar

    IPC: H01L33/00

    CPC classification number: H01L33/502 ,  H01L33/44 ,  H01L33/54

    Abstract: A photonic structure for “white” light generation by phosphors under the excitation of a LED. The photonic structure mounts the LED and an optically transparent nanocomposite matrix having dispersed therein phosphors which will emit light under the excitation of the radiation of the LED. The phosphors dispersed in the matrix may be nanocrystalline, or larger sized with the addition of non light emitting, non light scattering nanoparticles dispersed within the matrix material so as to match the index of refraction of the matrix material to that of the phosphors. The nanocomposite matrix material may be readily formed by molding and formed into a variety of shapes including lenses for focusing the emitted light. A large number of the photonic structures may be arranged on a substrate to provide even illumination or other purposes.

    Abstract translation: 在LED的激发下由磷光体产生“白”光的光子结构。 光子结构安装LED和具有分散在其中的荧光体的光学透明纳米复合物基体，其将在LED的辐射的激发下发光。 分散在基质中的磷光体可以是纳米晶体，或者通过添加分散在基质材料内的非发光的非光散射纳米粒子的尺寸，以使基质材料的折射率与荧光体的折射率相匹配。 纳米复合材料基体材料可以容易地通过模塑形成并形成为包括用于聚焦发射光的透镜的各种形状。 大量的光子结构可以被布置在基板上以提供均匀的照明或其它目的。

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