Method for the model-based determination of the biometry of eyes

    公开(公告)号:US09649024B2

    公开(公告)日:2017-05-16

    申请号:US13884827

    申请日:2011-11-09

    IPC分类号: A61B3/00 A61B3/10 G01B9/02

    摘要: For the model-based determination of the biometry of eyes, the eye is illuminated by a light source via a scanning unit, the focus of the measuring light beam in the eye is moved or shifted laterally and/or axially via an adjusting device and the light fractions back-scattered by the boundary surfaces and from the tissue of the eye via an interferometer are detected by a sensor and relayed to a control and evaluation unit by which a parametric eye model which describes at least two boundary surfaces present in the eye is adapted to the scan or scans. The invention relates to the field of ophthalmology and serves in particular for the optical determination of the biometry of eyes by application of two-dimensional optical coherence tomography images. However, the method is not limited to the use of coherence tomography nor to the utilization of optical measurements.

    Optimized device for swept source optical coherence domain reflectometry and tomography
    4.
    发明授权
    Optimized device for swept source optical coherence domain reflectometry and tomography 有权
    扫频源光学相干域反射和层析成像的优化设备

    公开(公告)号:US09492077B2

    公开(公告)日:2016-11-15

    申请号:US13981688

    申请日:2012-01-30

    IPC分类号: A61B3/14 A61B3/10 G01B9/02

    摘要: Optimized device for swept source optical coherence domain reflectometry and tomography. In the coherence-optical device, light, with the aid of an interferometer, is used for distance-measuring and imaging purposes on reflecting and scattering areas of the human eye. The optimized device according to the invention consists of includes a tunable light source, matched to the sought-after measurement region ZOCT, with a resonator length LR, an interferometric measurement arrangement, a data capturing unit for capturing the light portions scattered back from the sample and a data processing unit. Here the resonator length LR of the tunable light source is matched not only to the sought-after measurement region ZOCT, but also to the entire interferometric measurement arrangement such that disturbance points present in the interferometric measurement arrangement cannot create disturbance signals in the sought-after measurement region ZOCT.

    摘要翻译: 扫频源光学相干域反射和层析成像的优化设备。 在相干光学装置中,借助于干涉仪的光被用于在人眼的反射和散射区域上的距离测量和成像目的。 根据本发明的优化装置包括与所寻找的测量区域ZOCT匹配的可调谐光源,具有谐振器长度LR,干涉测量装置,用于捕获从样品散射回来的光部分的数据捕获单元 和数据处理单元。 这里,可调谐光源的谐振器长度LR不仅与所寻求的测量区域ZOCT匹配,而且与整个干涉测量装置相匹配,使得存在于干涉测量装置中的干扰点不能产生所寻求的干扰信号 测量区域ZOCT。

    System for determining the topography of the cornea of an eye
    5.
    发明授权
    System for determining the topography of the cornea of an eye 有权
    用于确定眼睛角膜的形态的系统

    公开(公告)号:US09084564B2

    公开(公告)日:2015-07-21

    申请号:US14119367

    申请日:2012-05-22

    IPC分类号: A61B3/107 G01B11/25

    CPC分类号: A61B3/107 G01B11/2513

    摘要: A system for determining the surface shape of the cornea of an eye by analyzing the reflection of a spatially distributed ring pattern. The system includes an element for generating a ring pattern, an illuminating unit, an image capturing unit, and a control and analyzing unit. The element for generating rings is a fresneled axicon with annular structures of different radii. Furthermore, an optical element for illuminating the entire surface of the fresneled axicon with plane waves and an optical element for separating the illuminating and detecting beam path are arranged between the illuminating unit and the fresneled axicon. Furthermore, the image capturing unit consisting of an imaging system and an image sensor is designed for a telecentric distance-independent image detection.

    摘要翻译: 通过分析空间分布的环形图案的反射来确定眼睛的角膜的表面形状的系统。 该系统包括用于产生环形图案的元件,照明单元,图像捕获单元和控制和分析单元。 用于产生环的元件是具有不同半径的环形结构的菲涅耳轴。 此外,用于照射具有平面波的菲涅尔三角镜的整个表面的光学元件和用于分离照明和检测光束路径的光学元件被布置在照明单元和菲涅耳透镜之间。 此外,由成像系统和图像传感器组成的图像捕获单元被设计用于远心距离独立图像检测。

    SS OCT interferometry for measuring a sample
    6.
    发明授权
    SS OCT interferometry for measuring a sample 有权
    SS OCT干涉仪用于测量样品

    公开(公告)号:US08632181B2

    公开(公告)日:2014-01-21

    申请号:US12997804

    申请日:2009-06-12

    IPC分类号: A61B3/14 A61B3/00 A61B3/113

    摘要: An SS OCT interferometry device for measuring a sample, in particular from an eye. The device interferometrically generates a measuring signal and from the signal a depth-resolved contrast signal of the sample by spectral tuning of the central wavelength of the measurement radiation of a measuring signal, and has a control unit for this purpose. The device includes a sample motion detector, which provides a motion signal indicating movement of or in the sample, the control unit uses the motion signal to correct the measuring signal with respect to measuring errors that are caused by a movement of or in the sample before or during the generation of the depth-resolved contrast signal.

    摘要翻译: 一种用于测量样品,特别是从眼睛的SS OCT干涉测量装置。 该装置通过对测量信号的测量辐射的中心波长的频谱调谐,干涉地产生测量信号,并从信号中产生样品的深度分辨对比度信号,并且具有用于该目的的控制单元。 该装置包括样品运动检测器,其提供指示样品的运动或运动信号,控制单元使用运动信号来校正测量信号,该测量信号是由样品的移动或样品所引起的测量误差 或在深度分辨的对比度信号的产生期间。

    Systems and methods for treating glaucoma and systems and methods for imaging a portion of an eye
    7.
    发明授权
    Systems and methods for treating glaucoma and systems and methods for imaging a portion of an eye 有权
    用于治疗青光眼的系统和方法以及用于对眼睛的一部分进行成像的系统和方法

    公开(公告)号:US08230866B2

    公开(公告)日:2012-07-31

    申请号:US12000477

    申请日:2007-12-13

    IPC分类号: A61B19/00

    摘要: Systems and methods are described for imaging an eye portion or for treating glaucoma in an eye of a patient. In a first step an optical microscopic image of a portion of the eye is acquired. In the optical microscopic image a distinguishable anatomical structure is identified to predict a location of a volume portion to be imaged three-dimensionally. Three-dimensional imaging of the located volume portion is performed by acquiring an optical coherence tomography image of the located volume portion. The volume portion is treated by either directing a laser beam to the volume portion or inserting an implant based on the OCT-image.

    摘要翻译: 描述了用于对眼部进行成像或用于治疗患者眼睛中的青光眼的系统和方法。 在第一步骤中,获取眼睛的一部分的光学显微镜图像。 在光学显微镜图像中,识别出可区分的解剖结构以预测待三维成像的体积部分的位置。 通过获取定位体积部分的光学相干断层摄影图像来执行定位体积部分的三维成像。 通过将激光束引导到体积部分或基于OCT图像插入植入物来处理体积部分。

    OPHTHALMOLOGICAL MEASURING SYSTEM AND METHOD FOR CALIBRATING AND/OR ADJUSTING THE SAME
    8.
    发明申请
    OPHTHALMOLOGICAL MEASURING SYSTEM AND METHOD FOR CALIBRATING AND/OR ADJUSTING THE SAME 有权
    用于校准和/或调整其的眼科测量系统和方法

    公开(公告)号:US20110299038A1

    公开(公告)日:2011-12-08

    申请号:US13127692

    申请日:2009-11-04

    IPC分类号: A61B3/10

    摘要: An ophthalmological measuring system, for obtaining biometric data of an eye, provided with the necessary calibration and check devices for monitoring the functionality and the calibration status. The ophthalmological measuring system includes an illumination source for illuminating an eye with light and with a sensor for recording and analyzing back-scattered or reflected light components and a controller. At least one calibration and check system integrated in the ophthalmological measuring system for monitoring the functional and calibration status is provided. A device is also provided which houses the calibration and test structures and which reads off the individual physical data therefrom by an interface. The ophthalmological measuring system is in particular provided for determining biometrical data but can also be used for ophthalmological, dermatological or other devices which require calibration and/or functional checking at regular intervals.

    摘要翻译: 一种用于获得眼睛生物特征数据的眼科测量系统,其具有必要的校准和检查装置,用于监视功能和校准状态。 眼科测量系统包括用于用光照射眼睛的照明源和用于记录和分析反向散射或反射光分量的传感器以及控制器。 提供集成在眼科测量系统中的至少一个校准和检查系统,用于监视功能和校准状态。 还提供一种装置,其容纳校准和测试结构,并且通过界面从其读出各个物理数据。 眼科测量系统特别用于确定生物数据,但也可用于需要定期进行校准和/或功能检查的眼科,皮肤病学或其他装置。

    OPHTHALMOLOGIC BIOMETRIC OR IMAGE GENERATING SYSTEM AND METHOD FOR DETECTION AND EVALUATION OF MEASURED DATA
    9.
    发明申请
    OPHTHALMOLOGIC BIOMETRIC OR IMAGE GENERATING SYSTEM AND METHOD FOR DETECTION AND EVALUATION OF MEASURED DATA 有权
    用于检测和评估测量数据的眼科生物学或图像生成系统和方法

    公开(公告)号:US20110069279A1

    公开(公告)日:2011-03-24

    申请号:US12886155

    申请日:2010-09-20

    IPC分类号: A61B3/10

    CPC分类号: A61B3/102

    摘要: An ophthalmological biometric or image-producing system and method for detection and analysis of measurement data including a measurement arrangement with an illumination unit for illuminating the eye with at least one measurement beam, a signal detection unit for the detection of the light portions scattered or reflected back from the eye, a central control unit with an output unit, and a pattern generating unit which includes an optical scan unit, a control unit as well as a position sensor for measuring the realized deflections of the optical scan unit, whereby control unit, optical scan unit and position sensor can form a control circuit. Thereby, the position sensor, except for the connection within the possible control circuit, includes a connection to a unit of the measurement arrangement for optimizing measurement value logging or to the central control unit for correcting the biometric measurements or tomograms.

    摘要翻译: 一种用于检测和分析测量数据的眼科生物测定或图像产生系统和方法,所述测量数据包括具有用于利用至少一个测量光束照射眼睛的照明单元的测量装置,用于检测散射或反射的光部分的信号检测单元 从眼睛回来的具有输出单元的中央控制单元,以及包括光学扫描单元,控制单元以及用于测量所实现的光学扫描单元的偏转的位置传感器的图案生成单元,由此控制单元, 光学扫描单元和位置传感器可以形成一个控制电路。 由此,除了可能的控制电路内的连接之外,位置传感器包括与用于优化测量值记录的测量装置的单元的连接或者用于校正生物测量或断层图像的中央控制单元的连接。

    High efficiency balanced detection interferometer
    10.
    发明申请
    High efficiency balanced detection interferometer 有权
    高效平衡检测干涉仪

    公开(公告)号:US20060109477A1

    公开(公告)日:2006-05-25

    申请号:US11264871

    申请日:2005-11-02

    IPC分类号: G01B9/02

    CPC分类号: G01B9/02091 G01B2290/40

    摘要: An interferometer configured for use in optical coherence domain (OCT) reflectometry systems is disclosed. In the preferred embodiments, efficient routing of light and a balanced detection arrangement provide a high signal to noise ratio. In a first set of embodiments, a 3×3 coupler is used to split light along separate sample and reference paths and also for combining light returning from those paths and supplying the interfered collected light to the detection system. In an alternate set of embodiments, a pair of cascaded 2×2 couplers provides a similar function. The interferometer can be used with various OCT modalities including time-domain and frequency domain approaches.

    摘要翻译: 公开了一种配置用于光学相干域(OCT)反射系统的干涉仪。 在优选实施例中,光的有效路由和平衡检测装置提供高的信噪比。 在第一组实施例中,使用3x3耦合器沿独立的采样和参考路径分离光,并且还用于组合从那些路径返回的光并将受干扰的收集的光提供给检测系统。 在另一组实施例中,一对级联的2x2耦合器提供类似的功能。 干涉仪可以与各种OCT模式一起使用,包括时域和频域方法。