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    Fiber optic imaging endoscope interferometer with at least one faraday rotator
    3.
    发明授权
    Fiber optic imaging endoscope interferometer with at least one faraday rotator 失效
    具有至少一个法拉第旋转器的光纤成像内窥镜干涉仪

    公开(公告)号：US06501551B1

    公开(公告)日：2002-12-31

    申请号：US09414293

    申请日：1999-10-05

    申请人： Guillermo Tearney ,  Stephen A. Boppart ,  Brett E. Bouma ,  Mark Brezinski ,  Eric A. Swanson ,  James G. Fujimoto

    发明人： Guillermo Tearney ,  Stephen A. Boppart ,  Brett E. Bouma ,  Mark Brezinski ,  Eric A. Swanson ,  James G. Fujimoto

    IPC分类号： G01B902

    CPC分类号： G11B7/005 ,  A61B1/00096 ,  A61B1/00172 ,  A61B1/00183 ,  A61B3/1005 ,  A61B3/102 ,  A61B5/0064 ,  A61B5/0066 ,  A61B5/0084 ,  A61B5/445 ,  A61B5/6852 ,  A61B2562/0242 ,  B82Y15/00 ,  G01B9/02002 ,  G01B9/02004 ,  G01B9/02007 ,  G01B9/0201 ,  G01B9/0205 ,  G01B9/02091 ,  G01B11/00 ,  G01B11/026 ,  G01B11/12 ,  G01B11/2441 ,  G01B2290/65 ,  G01B2290/70 ,  G01J1/00 ,  G01N21/4795 ,  G11B7/127 ,  G11B7/24 ,  G11B2007/0013 ,  H01S5/141

    摘要： An imaging system for performing optical coherence tomography includes an optical radiation source; a reference optical reflector; a first optical path leading to the reference optical reflector; and a second optical path coupled to an endoscopic unit. The endoscopic unit preferably includes an elongated housing defining a bore; a rotatable single mode optical fiber having a proximal end and a distal end positioned within and extending the length of the bore of the elongated housing; and an optical system coupled to the distal end of the rotatable single mode optical fiber, positioned to transmit the optical radiation from the single mode optical fiber to the structure and to transmit reflected optical radiation from the structure to the single mode optical fiber. The system further includes a beam divider dividing the optical radiation from the optical radiation source along the first optical path to the reflector and along the second optical path; and a detector positioned to receive reflected optical radiation from the reflector transmitted along the first optical path and reflected optical radiation transmitted from the structure along the second optical path. The detector generates a signal in response to the reflected optical radiation from the reference reflector and the reflected optical radiation from the structure, and a processor generating a image of the structure in response to the signal from the detector. The system provides both rotational and longitudinal scanning of an image.

    摘要翻译： 用于执行光学相干断层摄影的成像系统包括光辐射源; 参考光学反射器; 通向参考光反射器的第一光路; 以及耦合到内窥镜单元的第二光路。 内窥镜单元优选地包括限定孔的细长壳体; 可旋转的单模光纤，其具有定位在所述细长壳体的所述孔的长度内并延伸所述细长壳体的所述孔的长度的近端和远端; 以及耦合到可旋转单模光纤的远端的光学系统，定位成将光辐射从单模光纤传输到结构，并将反射的光辐射从结构传输到单模光纤。 该系统还包括一个光束分配器，将沿着第一光路的光辐射源的光辐射分成沿着第二光路; 以及检测器，其被定位成接收来自沿着第一光路传输的反射器的反射光辐射以及沿着第二光路从结构传输的反射光辐射。 检测器响应于来自参考反射器的反射光辐射和来自结构的反射光辐射产生信号，以及响应于来自检测器的信号产生结构图像的处理器。 该系统提供图像的旋转和纵向扫描。

    Double-chirped mirror systems and methods
    5.
    发明授权
    Double-chirped mirror systems and methods 失效
    双啁啾镜系统和方法

    公开(公告)号：US06590925B1

    公开(公告)日：2003-07-08

    申请号：US09630293

    申请日：2000-08-01

    申请人： Franz X. Kaertner ,  Erich P. Ippen ,  Uwe Morgner ,  James G. Fujimoto

    发明人： Franz X. Kaertner ,  Erich P. Ippen ,  Uwe Morgner ,  James G. Fujimoto

    IPC分类号： H01S308

    CPC分类号： H01S3/0057

    摘要： A mirror system for use in generating a short duration laser pulse is disclosed. The system includes first and second double-chirped mirrors disposed along an optical path within a cavity, where the second double-chirped mirror includes an additional phase-shifting layer as compared to the first double-chirped mirror. The additional phase-shifting layer causes the mirror system during use to produce a laser pulse that is characterized by oscillations in group delay substantially reduced in amplitude in comparison to oscillations in group delay for a pulse produced by the same system without the additional phase-shifting layer.

    摘要翻译： 公开了一种用于产生短时激光脉冲的镜系统。 该系统包括沿着空腔内的光路设置的第一和第二双啁啾反射镜，其中与第一双啁啾反射镜相比，第二双啁啾反射镜包括附加的相移层。 附加的移相层在使用过程中使镜系统产生激光脉冲，其特征在于与同一系统产生的脉冲的组延迟的振荡相比，组延迟中的振荡明显减小，而没有附加的相移 层。

    Dispersion-compensated laser using prismatic end elements
    6.
    发明授权
    Dispersion-compensated laser using prismatic end elements 失效
    使用棱镜端元件的色散补偿激光

    公开(公告)号：US5553093A

    公开(公告)日：1996-09-03

    申请号：US467135

    申请日：1995-06-05

    申请人： Mailini Ramaswamy ,  James G. Fujimoto

    发明人： Mailini Ramaswamy ,  James G. Fujimoto

    IPC分类号： H01S3/08 ,  H01S3/081 ,  H01S3/098 ,  H01S3/16

    CPC分类号： H01S3/1112 ,  H01S3/0943 ,  H01S3/08059 ,  H01S3/0811 ,  H01S3/0815 ,  H01S3/0816 ,  H01S3/1625

    摘要： A laser resonant cavity defined by a set of reflective end elements positioned to together form a closed optical path, again medium positioned along the closed optical path, means for exciting the gain medium to produce a laser beam within the cavity, at least one focusing element positioned within the cavity in optical alignment with the gain medium, and a prism positioned as one of the end elements of the cavity and providing angular dispersion of the laser beam. The prism, end elements, gain medium, and focusing elements are positioned with respect to each other such that the resonant cavity supports a coexistence of several monochromatic laser modes, each mode having a distinct propagation axis. Propagation axes of modes having relatively longer wavelengths traverse more of the prism than propagation axes of modes having relatively shorter wavelengths, resulting in the addition of a negative component to the group velocity dispersion of the laser cavity. The invention provides group velocity dispersion compensation using one or more prismatic end elements without the need for any additional intracavity elements whose sole purpose is dispersion compensation.

    摘要翻译： 由一组反射端元件限定的激光谐振腔，所述一组反射端元件一起形成闭合光路，并且沿闭合光路再次介质定位，用于激发增益介质以在腔内产生激光束的装置，至少一个聚焦元件 定位在腔内与增益介质光学对准，以及棱镜，其定位为空腔的一个端元件并提供激光束的角度色散。 棱镜，端元件，增益介质和聚焦元件相对于彼此定位，使得谐振腔支持若干单色激光模式的共存，每个模式具有不同的传播轴。 具有相对较长波长的模式的传播轴比具有相对更短波长的模式的传播轴越过棱镜，导致向激光腔的群速度色散添加负分量。 本发明使用一个或多个棱柱端元件提供组速度色散补偿，而不需要任何额外的腔内元件，其唯一目的是色散补偿。

    METHOD AND APPARATUS FOR MOTION CORRECTION AND IMAGE ENHANCEMENT FOR OPTICAL COHERENCE TOMOGRAPHY
    8.
    发明申请
    METHOD AND APPARATUS FOR MOTION CORRECTION AND IMAGE ENHANCEMENT FOR OPTICAL COHERENCE TOMOGRAPHY 有权
    运动校正和图像增强的光学相干图像的方法和装置

    公开(公告)号：US20110267340A1

    公开(公告)日：2011-11-03

    申请号：US13097785

    申请日：2011-04-29

    申请人： Martin F.G. Kraus ,  Benjamin M. Potsaid ,  James G. Fujimoto ,  Markus Anton Mayer ,  Ruediger Bock ,  Joachim Hornegger

    发明人： Martin F.G. Kraus ,  Benjamin M. Potsaid ,  James G. Fujimoto ,  Markus Anton Mayer ,  Ruediger Bock ,  Joachim Hornegger

    IPC分类号： G06T15/00

    CPC分类号： G06T11/006 ,  A61B3/0025 ,  A61B3/102 ,  G06T7/248 ,  G06T7/30 ,  G06T2207/10101 ,  G06T2207/30041

    摘要： Images of an object, such as OCT scans of a human eye, can include distortions and data gaps due to relative motion of the object and the image acquisition device. Methods and systems for correction of such distortions and data gaps are described herein. Motion-corrected data is arrived at by applying three-dimensional transforms to input three-dimensional data sets that represent at least partially overlapping regions of the imaged object. The three dimensional transforms are computed based on an objective function that accounts for similarity between the transformed three-dimensional data sets and the estimated motion of the object relative to an imaging instrument. Methods and systems described herein advantageously eliminate the need for postulated assumptions and reliance on landmarks and are capable of filling data gaps, thereby producing high quality, undistorted images of objects subject to movement during imaging. Multiple motion-corrected data sets can be merged or combined to produce a data set with improved image quality.

    摘要翻译： 诸如人眼的OCT扫描的物体的图像可能包括由于物体和图像采集装置的相对运动引起的失真和数据间隙。 本文描述了用于校正这种失真和数据间隙的方法和系统。 通过应用三维变换来输入表示成像对象的至少部分重叠区域的三维数据集来获得运动校正数据。 基于目标函数来计算三维变换，该目标函数考虑了变换的三维数据集之间的相似性以及物体相对于成像仪器的估计的运动。 本文描述的方法和系统有利地消除了对假定假设和对地标的依赖的需要，并且能够填补数据间隙，从而产生在成像期间经受运动的物体的高质量，未失真的图像。 可以将多个运动校正数据集合或组合以产生具有改进的图像质量的数据集。