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13 条记录 (耗时 0.038 秒)

    Method and apparatus for optical coherence tomographic fundus imaging without vignetting
    2.
    发明授权
    Method and apparatus for optical coherence tomographic fundus imaging without vignetting 失效
    光学相干断层扫描眼底成像无晕影的方法和装置

    公开(公告)号：US5537162A

    公开(公告)日：1996-07-16

    申请号：US169705

    申请日：1993-12-17

    申请人： Thomas Hellmuth ,  Jay Wei

    发明人： Thomas Hellmuth ,  Jay Wei

    IPC分类号： A61B3/14 ,  A61B3/12 ,  G01B9/02

    CPC分类号： A61B3/102 ,  G01B9/02002 ,  G01B9/0203 ,  G01B9/02091 ,  G01B2290/15

    摘要： Apparatus for illuminating the fundus of an eye with a scanned sample beam of radiation, the scanned sample beam emerging from a beam scanner which is exposed to a sample beam, which apparatus is for use in optical coherence tomography. An embodiment of the apparatus includes: (a) scanner lens and a beamsplitter for transferring radiation from the scanned sample beam, including chief rays of the sample beam which emerge from a point of final deflection of the beam scanner, and (b) a lens for focusing the transferred radiation so that the scanned sample beam is focused onto the fundus by the eye. In accordance with the invention the scanner lens is fixed with respect to the beam scanner so that the point of final deflection is located substantially in the back focal plane of the scanner lens and the scanner lens is movable.

    摘要翻译： 用于用扫描的样本光束照射眼睛的眼底的装置，所述扫描的样本光束从暴露于样本束的束扫描器中出射，该装置用于光学相干断层扫描。 该装置的一个实施例包括：（a）扫描仪透镜和分束器，用于传送来自扫描的样品束的辐射，包括从光束扫描器的最终偏转点出现的样品束的主射线，以及（b）透镜 用于聚焦转移的辐射，使得扫描的样品束被眼睛聚焦到眼底。 根据本发明，扫描器透镜相对于光束扫描器固定，使得最终偏转点基本位于扫描仪透镜的后焦平面上，并且扫描仪透镜是可移动的。

    Optical coherence tomography assisted ophthalmologic surgical microscope
    3.
    发明授权
    Optical coherence tomography assisted ophthalmologic surgical microscope 失效
    光学相干断层扫描辅助眼科手术显微镜

    公开(公告)号：US5493109A

    公开(公告)日：1996-02-20

    申请号：US292433

    申请日：1994-08-18

    申请人： Jay Wei ,  Thomas Hellmuth

    发明人： Jay Wei ,  Thomas Hellmuth

    IPC分类号： A61B3/107 ,  A61B18/20 ,  A61F9/008 ,  A61F9/01 ,  G01B9/02 ,  G02B21/00 ,  G02B7/09

    CPC分类号： G02B21/0012 ,  A61B3/102 ,  A61B3/13 ,  G01B9/02002 ,  G01B9/0203 ,  G01B9/02034 ,  G01B9/02068 ,  G01B9/02091 ,  A61B18/20 ,  A61B2018/00636 ,  A61F2009/00851 ,  A61F2009/00872 ,  A61F2009/00887 ,  A61F2009/00889

    摘要： Ophthalmologic surgical microscope which is combined internally with an optical coherence tomography ("OCT") apparatus wherein auto-focusing is provided by driving a motorized internal focusing lens of the ophthalmologic surgical microscope with a signal output from the OCT apparatus. An embodiment of the inventive ophthalmologic surgical microscope includes: (a) an optical coherence tomography ("OCT") apparatus; (b) a beamcombiner for internally coupling output from the OCT apparatus into the ophthalmologic surgical microscope; and (c) a motor for moving an internal focusing lens of the ophthalmologic surgical microscope in response to a signal from the OCT apparatus, whereby the ophthalmologic surgical microscope is auto-focused.

    摘要翻译： 在内部与光学相干断层摄影（“OCT”）装置组合的眼科手术显微镜，其中通过从OCT装置输出的信号驱动眼科手术显微镜的机动化内部聚焦透镜来提供自动聚焦。 本发明的眼科手术显微镜的一个实施例包括：（a）光学相干断层摄影（“OCT”）装置; （b）用于将OCT设备的输出内部耦合到眼科手术显微镜中的束联合器; 和（c）用于响应于来自OCT装置的信号移动眼科手术显微镜的内部聚焦透镜的电动机，由此眼科手术显微镜被自动聚焦。

    System for measuring the optical image quality of an eye in a contactless manner
    4.
    发明授权
    System for measuring the optical image quality of an eye in a contactless manner 失效
    用于以非接触方式测量眼睛的光学图像质量的系统

    公开(公告)号：US07084986B2

    公开(公告)日：2006-08-01

    申请号：US10129255

    申请日：2001-08-31

    申请人： Thomas Hellmuth ,  Lieng-Chuong Tan

    发明人： Thomas Hellmuth ,  Lieng-Chuong Tan

    IPC分类号： G01B9/02 ,  A61B3/10

    CPC分类号： G01B9/0209 ,  A61B3/1005 ,  A61B3/12 ,  G01B9/02029 ,  G01B2290/35

    摘要： A system is used for contactless measurement of the optical imaging quality of an eye with an interferometer by which at least one light pulse with a short coherence length is coupled into the eye from a light source. The optical path length of at least one arm of the interferometer is varied for measuring the length of the eye until a typical interference pattern between a reflection of the cornea and a reflection of the retina of the eye occurs in a detector. This interference pattern together with a known path segment of the variation of the optical path length allows conclusions to be made about the length of the eye. The variation of the optical path length is carried out by introducing at least partially optically transparent elements and by at least one element of the interferometer which is movable in a defined manner in at least one of the light paths of the interferometer.

    摘要翻译： 一种系统用于用干涉仪对眼睛的光学成像质量进行非接触式测量，通过该干涉仪将来自光源的至少一个具有短相干长度的光脉冲耦合到眼睛中。 改变干涉仪的至少一个臂的光程长度，用于测量眼睛的长度，直到在检测器中发生角膜的反射和眼睛的视网膜的反射之间的典型干涉图案。 该干涉图案与光路长度的变化的已知路径段一起可以得出关于眼睛长度的结论。 光路长度的变化通过引入至少部分光学透明的元件和通过干涉仪的至少一个元件来进行，干涉仪的至少一个元件可以以限定的方式移动到干涉仪的至少一个光路中。

    Short coherence length, doppler velocimetry system
    6.
    发明授权
    Short coherence length, doppler velocimetry system 失效

    公开(公告)号：US5549114A

    公开(公告)日：1996-08-27

    申请号：US546765

    申请日：1995-10-23

    申请人： Christopher L. Petersen ,  Thomas Hellmuth

    发明人： Christopher L. Petersen ,  Thomas Hellmuth

    IPC分类号： A61B5/0285 ,  A61B3/12 ,  A61B5/02

    CPC分类号： A61B3/1233

    摘要： Apparatus for measuring the speed of blood in blood vessels in biological samples, for example, in retinal blood vessels, which apparatus includes: (a) a source of a beam of radiation having a principal wavelength, which radiation is substantially spatially coherent and has a temporal coherence length which is less than 1 picosecond; (b) a beam splitter for splitting the beam into a sample beam and reference beam; (c) optical apparatus for directing the sample beam to an area within the biological sample; (d) a reflector for reflecting the reference beam; (e) a detector for detecting an interference between the sample beam reflected from the area and the reflected reference beam and for generating an interference signal; (f) apparatus for altering an optical path length of the reference beam from the beam splitter to the detector at an alteration velocity; and (g) an analyzer for analyzing the interference signal to determine the speed of the blood in the area from a shift of a central frequency of a frequency spectrum of the interference signal from a frequency determined from the alteration velocity and the principal wavelength.

    Measurement of lens characteristics
    7.
    发明授权
    Measurement of lens characteristics 失效
    透镜特性测量

    公开(公告)号：US5469261A

    公开(公告)日：1995-11-21

    申请号：US301260

    申请日：1994-09-06

    申请人： Thomas Hellmuth ,  Charles E. Campbell ,  Jay Wei

    发明人： Thomas Hellmuth ,  Charles E. Campbell ,  Jay Wei

    IPC分类号： G01M11/00 ,  G01B9/02 ,  G01M11/02

    CPC分类号： G01M11/0228 ,  G01B9/02002 ,  G01B9/02024 ,  G01B9/0209 ,  G01B2290/15

    摘要： Method and apparatus for measuring the following lens characteristics: (a) curvature of the front and back surfaces of the lens; (b) physical thickness; and (c) index of refraction of the lens to determine the front vertex power, back vertex power; and the lens material. In particular, an embodiment of one aspect of the present invention for measuring the index of refraction of the glass includes: (a) a source of a substantially spatially coherent beam of radiation and having a short temporal coherence length; (b) a beamsplitter to provide a sample beam and a reference beam in response to the beam; (c) a translatable retroreflector which reflects the reference beam; (d) a holder to hold the material in the path of the sample beam, the holder including a retroreflector which reflects the sample beam back through the material and a caliper apparatus to measure the thickness of the material where the sample beam passes through; (e) a detector which detects the reflected reference beam and the reflected sample beam to produce a detector output signal; and (f) an analyzer which determines a position of the translatable retroreflector in response to the detector output signal and which determines the index of refraction of the material in response to the position of the translatable reflector means and the thickness of the material.

    摘要翻译： 用于测量以下透镜特性的方法和装置：（a）透镜的前表面和后表面的曲率; （b）物理厚度; 和（c）透镜折射率以确定前顶点功率，反向顶点功率; 和透镜材料。 特别地，用于测量玻璃折射率的本发明的一个方面的实施例包括：（a）基本上空间相干的辐射束源，具有短的时间相干长度; （b）分束器，以响应于光束提供样本光束和参考光束; （c）反射参考光束的可平移的后向反射器; （d）用于将材料保持在样品梁的路径中的保持器，所述保持器包括将样品束反射回材料的回射器和卡钳装置，以测量样品束通过的材料的厚度; （e）检测器，其检测反射的参考光束和反射的样本光束以产生检测器输出信号; 和（f）分析器，其响应于检测器输出信号确定可平移后向反射器的位置，并且响应于可平移反射器装置的位置和材料的厚度确定材料的折射率。

    Method and apparatus for simultaneously measuring the length and refractive error of an eye
    8.
    发明授权
    Method and apparatus for simultaneously measuring the length and refractive error of an eye 失效
    同时测量眼睛长度和屈光不正的方法和装置

    公开(公告)号：US5975699A

    公开(公告)日：1999-11-02

    申请号：US69644

    申请日：1998-04-29

    申请人： Thomas Hellmuth

    发明人： Thomas Hellmuth

    IPC分类号： A61B3/10 ,  A61B3/103

    CPC分类号： A61B3/103 ,  A61B3/1005

    摘要： Embodiments of the present invention are method and apparatus for simultaneously measuring the length and refractive error of an eye, preferably in a non-contact mode. In particular, an embodiment of the present invention is an apparatus which measures length and refractive error of an eye which includes: (a) a source of short coherence radiation which couples radiation into a Michelson interferometer, the arms of the Michelson interferometer having a predetermined optical pathlength difference; (b) an injector which couples radiation output from the interferometer into the eye; and (c) a relay system which couples radiation output from the eye to a spectrometer; wherein the spectrometer measures displacement of radiation to measure the refractive error and the spectrometer measures density of fringes to measure the length.

    摘要翻译： 本发明的实施例是用于同时测量眼睛的长度和屈光不正的方法和装置，优选非接触模式。 特别地，本发明的一个实施例是测量眼睛的长度和屈光不正的装置，其包括：（a）将辐射耦合到迈克尔逊干涉仪中的短相干辐射源，迈克尔逊干涉仪的臂具有预定的 光程差; （b）将来自干涉仪的辐射输出耦合到眼睛中的注射器; 和（c）将来自眼睛的辐射输出耦合到光谱仪的中继系统; 其中光谱仪测量辐射的位移以测量折射误差，并且光谱仪测量条纹的密度以测量长度。