公开(公告)号：US20120062898A1

公开(公告)日：2012-03-15

申请号：US13178695

申请日：2011-07-08

Applicant: Adrian PODOLEANU

Inventor： Adrian PODOLEANU

IPC: G01B9/02

CPC classification number: A61B3/102 ,  A61B5/0064 ,  A61B5/0066 ,  A61B5/0073 ,  A61B5/441 ,  A61B5/7203 ,  A61B5/7257 ,  G01B9/02044 ,  G01B9/02069 ,  G01B9/02091 ,  G01N21/4795

Abstract: A spectral interferometry apparatus and method is provided to supply unambiguous profiles (A-scans free of mirror terms) of the reflectivity versus optical path difference and make difference between the positive and negative optical path difference or provide output in a selected interval of optical path differences. The apparatus comprises object optics that transfer a beam from an optical source to a target object (55) to produce an object beam and reference optics that produce a reference beam. Displacing means (57) are provided to produce a gap (g) between the object beam (41′) and the reference beam (42′). Optical spectrum dispersing means (7) such as a grating or a prism receive the two relatively displaced beams, and disperse their spectral content onto a reading element such as a CCD. The combination of the displacing means and the optical spectrum dispersing means creates an intrinsic optical delay between the wavetrains of the object beam and the reference beam which can be used with the optical path difference in the interferometer to generate a channelled spectrum for the optical path difference in the interferometer on the reading element.

Abstract translation: 提供了一种光谱干涉测量装置和方法来提供反射率相对于光程差的明确分布（无镜像的A扫描），并使得在正和负光程差之间产生差异，或者在所选择的光程差间隔中提供输出 。 该装置包括将光束从光源传输到目标物体（55）以产生物体光束和产生参考光束的参考光学器件的物体光学器件。 设置位移装置（57）以在物体光束（41'）和参考光束（42'）之间产生间隙（g）。 诸如光栅或棱镜的光谱分散装置（7）接收两个相对移动的光束，并将其光谱含量分散到诸如CCD的读取元件上。 位移装置和光谱分散装置的组合在物体光束的波长与参考光束之间产生固有的光学延迟，该参考光束可与干涉仪中的光程差用于产生用于光程差的通道光谱 在干涉仪上读取元件。

公开(公告)号：US20120013909A1

公开(公告)日：2012-01-19

申请号：US12958791

申请日：2010-12-02

Applicant: Adrian Podoleanu ,  Michael Leitner

Inventor： Adrian Podoleanu ,  Michael Leitner

IPC: G01J3/45 ,  A61B3/10

CPC classification number: A61B3/1225 ,  A61B3/102 ,  A61B3/103 ,  G01B9/02004 ,  G01B9/02027 ,  G01B9/02044 ,  G01B9/02065 ,  G01B9/02089 ,  G01B9/0209

Abstract: A spectral interferometry apparatus and method are disclosed, that can be used to monitor or measure an unknown length by following a characteristic of an indicating signal. The measurement is performed by adjusting an optical path difference (OPD) in an interferometer part of an interferometer configuration until sound or light or both are obtained with the desired strength and pitch. Embodiments are presented where the unknown length is the eye length. Spectral interrogation of the interferometer optical output is achieved by reading the signal of an analogue photodetector array in a spectrometer or by tuning a swept source and processing the signal of a photodetector. Sound of different pitches are produced either directly in this process, or by using a nonlinear amplifier, or a mixer. For enhanced signal, the array may be driven by a nonlinear clock or the swept source may be driven by a distorted driving signal.

Abstract translation: 公开了一种光谱干涉测量装置和方法，其可以用于通过遵循指示信号的特性来监视或测量未知长度。 通过调整干涉仪配置的干涉仪部分中的光程差（OPD）来进行测量，直到以期望的强度和间距获得声音或光或者两者。 呈现其中未知长度是眼睛长度的实施例。 通过读取光谱仪中的模拟光电检测器阵列的信号或通过调谐扫频源并处理光电检测器的信号来实现干涉仪光输出的光谱询问。 在该过程中直接产生不同音调的声音，或者通过使用非线性放大器或混音器产生声音。 对于增强的信号，阵列可以由非线性时钟驱动，或者扫描的源可以由失真的驱动信号驱动。

公开(公告)号：US20110134436A1

公开(公告)日：2011-06-09

申请号：US12764510

申请日：2010-04-21

Applicant: Adrian Podoleanu ,  Simon Tuohy

Inventor： Adrian Podoleanu ,  Simon Tuohy

IPC: G01B11/02

CPC classification number: G01B9/02004 ,  A61B3/1015 ,  A61B3/102 ,  A61B3/156 ,  G01B9/02002 ,  G01B9/0201 ,  G01B9/02027 ,  G01B9/02038 ,  G01B9/02063 ,  G01B9/02068 ,  G01B9/0209 ,  G01B9/02091 ,  G01B2290/45 ,  G01B2290/70

Abstract: Methods and devices are disclosed for acquiring depth resolved aberration information using principles of low coherence interferometry and perform coherence gated wavefront sensing (CG-WFS). The wavefront aberrations is collected using spectral domain low coherence interferometry (SD-LCI) or time domain low coherence interferometry (TD-LCI) principles. When using SD-LCI, chromatic aberrations can also be evaluated. Methods and devices are disclosed in using a wavefront corrector to compensate for the aberration information provided by CG-WFS, in a combined imaging system, that can use one or more channels from the class of (i) optical coherence tomography (OCT), (ii) scanning laser ophthalmoscopy, (iii) microscopy, such as confocal or phase microscopy, (iv) multiphoton microscopy, such as harmonic generation and multiphoton absorption. In particular, a swept source (SS) is used that drives both an OCT channel and a coherence gated wavefront sensor, where: a) both channels operate according to SS-OCT principles; b) OCT channel integrates over at least one tuning scan of the swept source to provide a TD-OCT image of the object; c) CG-WFS integrates over at least one tuning scan of the swept source to provide an en-face TD-OCT mapping of the wavefront. For some implementations, simultaneous and dynamic aberration measurements/correction with the imaging process is achieved. The methods and devices for depth resolved aberrations disclosed, will find applications in wavefront sensing and adaptive optics imaging systems that are more tolerant to stray reflections from optical interfaces, such as reflections from the microscope objectives and cover slip in microscopy and when imaging the eye, the reflection from the cornea.

Abstract translation: 公开了使用低相干干涉测量原理获取深度分辨像差信息并执行相干门控波前检测（CG-WFS）的方法和装置。 使用频域低相干干涉测量（SD-LCI）或时域低相干干涉测量（TD-LCI）原理收集波前像差。 当使用SD-LCI时，也可以评估色差。 在使用波前校正器来补偿在组合成像系统中由CG-WFS提供的像差信息的方法和装置被公开，该组合成像系统可以使用来自（i）光学相干断层扫描（OCT）的一个或多个通道， ii）扫描激光眼底镜检查，（iii）显微镜，如共焦或相位显微镜，（iv）多光子显微镜，如谐波产生和多光子吸收。 特别地，使用驱动OCT通道和相干门控波前传感器的扫频源（SS），其中：a）两个通道根据SS-OCT原理操作; b）OCT信道在扫描源的至少一次调谐扫描上进行积分以提供对象的TD-OCT图像; c）CG-WFS集成了扫描源的至少一个调谐扫描，以提供波前的面向TD-OCT映射。 对于一些实施方案，实现了通过成像过程的同步和动态像差测量/校正。 所公开的用于深度分辨像差的方法和装置将会在波前感测和自适应光学成像系统中应用，这些系统对光学界面的杂散反射更为宽容，例如来自显微镜物镜的反射和显微镜下的盖滑动以及当成像眼睛时， 角膜的反射。

公开(公告)号：US07113818B2

公开(公告)日：2006-09-26

申请号：US10117322

申请日：2002-04-08

Applicant: Adrian Podoleanu ,  John Rogers

Inventor： Adrian Podoleanu ,  John Rogers

IPC: A61B6/00

CPC classification number: A61B3/102 ,  A61B3/1025 ,  G01B9/0203 ,  G01B9/02077 ,  G01B9/02083 ,  G01B9/02091 ,  G01B2290/65

Abstract: Apparatus for high resolution imaging of a moving object comprises a source of low coherence light, an optical coherence tomography imaging instrument or a dual channel, optical coherence tomography/confocal imaging instrument, a transverse scanner, an interferometer, depth adjustment means, and interface optics. First and an optional second sensing blocks sense the axial and respectively the transverse position of the object. A splitting element is shared so that the interface optics and the sensing blocks have a common axis of light transmitted to and from the object. Timing means establishes a timing, and timing intervals and reference times for images as they are taken. The acceptability of each scanned image is determined according to predetermined criteria. A series of en-face OCT images, or of longitudinal OCT images of the object may be taken at different depths or transverse coordinates, and the stack of collected images is used to build 3D profiles of the object.

公开(公告)号：US20050264820A1

公开(公告)日：2005-12-01

申请号：US11177047

申请日：2005-07-08

Applicant: Adrian Podoleanu ,  David Jackson ,  John Rogers ,  George Dobre ,  Radu Cucu

Inventor： Adrian Podoleanu ,  David Jackson ,  John Rogers ,  George Dobre ,  Radu Cucu

IPC: G01B9/02 ,  G01N21/47

CPC classification number: A61B3/102 ,  A61B5/0066 ,  G01B9/0201 ,  G01B9/02027 ,  G01B9/0203 ,  G01B9/02058 ,  G01B9/02063 ,  G01B9/02091 ,  G01B2290/45 ,  G01B2290/70 ,  G01N21/23 ,  G01N21/4795

Abstract: OCT apparatus includes an interferometer, having an input beam splitter and a 50/50 output splitter. The splitting ratio of the input splitter may be optimized depending on the source power of light source and on the mismatch of the balanced receiver. The input splitter is a plate beam-splitter to minimize the stray reflected light in the interferometer and allow sequential operation of the apparatus in the OCT or in the confocal regime. The switching between the two regimes may be at will, or synchronous with the en-face scanning which results in quasi-simultaneous OCT/confocal imaging or in alternatives frames, confocal and OCT. By using polarization sensitive elements, two channels are provided in each regime, OCT and confocal. The two confocal polarization sensitive channels may allow adjustments of compensators prior to OCT measurements or OCT imaging.

Abstract translation: OCT设备包括具有输入分束器和50/50输出分离器的干涉仪。 输入分路器的分频比可以根据光源的功率和平衡接收机的不匹配进行优化。 输入分路器是平板分光器，以最小化干涉仪中的杂散反射光，并允许在OCT或共聚焦状态下对装置的顺序操作。 两种方案之间的切换可以是随意的，或者与进行准同时OCT /共聚焦成像或替代帧，共聚焦和OCT的en-face扫描同步。 通过使用极化敏感元件，在每个方案中提供了两个通道，OCT和共聚焦。 两个共焦极化敏感通道可以允许在OCT测量或OCT成像之前调整补偿器。

公开(公告)号：US20050231727A1

公开(公告)日：2005-10-20

申请号：US11056316

申请日：2005-02-11

Applicant: Adrian Podoleanu ,  John Rogers

Inventor： Adrian Podoleanu ,  John Rogers

IPC: A61B3/10 ,  A61B3/12 ,  A61B5/00 ,  G01B9/02 ,  G01B11/00 ,  G01B11/24 ,  G01J1/00 ,  G02B23/24

CPC classification number: G01B9/0203 ,  A61B3/102 ,  G01B9/02049 ,  G01B9/02063 ,  G01B9/02091 ,  G01B2290/35 ,  G01B2290/65 ,  G01B2290/70

Abstract: An optical coherence tomography (OCT) apparatus includes an optical source, an interferometer generating an object beam and a reference beam, a transverse scanner for scanning an object with said object beam, and a processor for generating an OCT image from an OCT signal returned by said interferometer. At least the optical source, the interferometer, and the scanner are mounted on a common translation stage displaceable towards and away from said object. A dynamic focus solution is provided when the scanner and a folded object path are placed on the translation stage.

Abstract translation: 光学相干断层摄影（OCT）装置包括光源，产生物体光束和参考光束的干涉仪，用于用所述物体光束扫描物体的横向扫描仪，以及用于从OCT信号产生OCT图像的处理器， 所述干涉仪。 至少光源，干涉仪和扫描仪安装在可朝向和远离所述物体移动的公共平移台上。 当扫描仪和折叠对象路径放置在平移台上时，提供动态聚焦解决方案。