公开(公告)号：US07557930B2

公开(公告)日：2009-07-07

申请号：US10996930

申请日：2004-11-23

申请人： Walter V. Werner ,  Park E. Hays

发明人： Walter V. Werner ,  Park E. Hays

IPC分类号： G01B11/02 ,  G01B9/02

CPC分类号： G01B9/02035 ,  G01B9/02058

摘要： A measurement method and apparatus rely upon the coherent optical interference between a reference beam and a diffractionless sensing beam having an optical path length that has been disturbed. The interference pattern can be analyzed to determine a measurement parameter of the disturbance. The diffractionless beam is particularly a Bessel beam. Exemplary optical interferometer types including Mach-Zehnder, Michelson, Sagnac and Fabry-Perot include a Bessel beam generator to generate a diffractionless beam as the sensing optical beam and in some aspects the reference optical beam of the interferometer. The sensing optical beam propagates along a sensing optical beam path in free-space. The reference optical beam path may be a free-space medium or a material medium such as an optical fiber. The sensing optical beam path is subject to a disturbance manifested by the optical interference pattern between the sensing optical beam and the reference optical beam. Parameters of the disturbance, such as motion, acoustics, environmental conditions and others can be determined by analysis of the interference pattern.

摘要翻译： 测量方法和装置依赖于参考光束和具有已被干扰的光程长度的无衍射感测光束之间的相干光学干涉。 可以分析干扰图案以确定扰动的测量参数。 无衍射光束特别是贝塞尔光束。 包括Mach-Zehnder，Michelson，Sagnac和Fabry-Perot的示例性光学干涉仪包括贝塞尔光束发生器，以产生无衍射光束作为感测光束，并且在某些方面产生干涉仪的参考光束。 感测光束沿自由空间中的感测光束路径传播。 参考光束路径可以是自由空间介质或诸如光纤的材料介质。 感测光束路径受到由感测光束和参考光束之间的光学干涉图案表现的干扰。 可以通过分析干扰图来确定干扰参数，如运动，声学，环境条件等。

公开(公告)号：US07310150B2

公开(公告)日：2007-12-18

申请号：US10501268

申请日：2003-01-10

申请人： Tearney J. Guillermo ,  Brett E. Bouma

发明人： Tearney J. Guillermo ,  Brett E. Bouma

IPC分类号： G01B9/02

CPC分类号： G01B9/02035 ,  G01B9/02028 ,  G01B9/02036 ,  G01B9/02091 ,  G01N21/4795

摘要： A system, apparatus and method for performing low coherence ranging of a sample with high transverse resolution and large depth of focus can be provided. For example, an optical ranging system including a light source can be used. Certain exemplary arrangement can be provided, e.g., a first arrangement for directing light from the light source to the sample, a second arrangement for directing reflected light from the sample to a detector, at least one detector, and a third arrangement for processing light data received by the detector and which generates an image can be utilized. Further, for example, an optical element can be provided which can have a transverse resolution defined as .Δris less than or equal to about μ5 m, and a depth of focus Δz of at least about 50 μm.

摘要翻译： 可以提供用于执行具有高横向分辨率和大的焦深的样品的低相干范围的系统，装置和方法。 例如，可以使用包括光源的光学测距系统。 可以提供某些示例性布置，例如用于将来自光源的光引导到样品的第一布置，用于将来自样品的反射光引导到检测器的第二布置，至少一个检测器和用于处理光数据的第三布置 可以利用检测器接收并产生图像的图像。 此外，例如，可以提供可以具有定义为小于或等于约5μm的横向分辨率和至少约50μm的聚焦深度Deltaz的光学元件。

公开(公告)号：US07072045B2

公开(公告)日：2006-07-04

申请号：US10345671

申请日：2003-01-16

申请人： Zhongping Chen ,  Zhihua Ding ,  J. Stuart Nelson

发明人： Zhongping Chen ,  Zhihua Ding ,  J. Stuart Nelson

IPC分类号： G01B9/02

CPC分类号： G01B9/02027 ,  G01B9/0201 ,  G01B9/02035 ,  G01B9/02045 ,  G01B9/0205 ,  G01B9/02091 ,  G01B2290/70

摘要： In optical coherence tomography (OCT), Axial and lateral resolutions are determined by the source coherence length and numerical aperture of the sampling lens, respectively. While axial resolution can be improved using a broadband light source, there is a trade-off between lateral resolution and focusing depth when conventional optical elements are used. The incorporation of an axicon lens into the sample arm of the interferometer overcomes this limitation. Using an axicon lens with a top angle of 160 degrees, 10 μm or better-lateral resolution is maintained over a focusing depth of at least 6 mm. In addition to high lateral resolution, the focusing spot intensity is approximately constant over a greater depth range.

公开(公告)号：US20060109476A1

公开(公告)日：2006-05-25

申请号：US10996930

申请日：2004-11-23

申请人： Walter Werner ,  Park Hays

发明人： Walter Werner ,  Park Hays

IPC分类号： G01B9/02

CPC分类号： G01B9/02035 ,  G01B9/02058

摘要： A measurement method and apparatus rely upon the coherent optical interference between a reference beam and a diffractionless sensing beam having an optical path length that has been disturbed. The interference pattern can be analyzed to determine a measurement parameter of the disturbance. The diffractionless beam is particularly a Bessel beam. Exemplary optical interferometer types including Mach-Zehnder, Michelson, Sagnac and Fabry-Perot include a Bessel beam generator to generate a diffractionless beam as the sensing optical beam and in some aspects the reference optical beam of the interferometer. The sensing optical beam propagates along a sensing optical beam path in free-space. The reference optical beam path may be a free-space medium or a material medium such as an optical fiber. The sensing optical beam path is subject to a disturbance manifested by the optical interference pattern between the sensing optical beam and the reference optical beam. Parameters of the disturbance, such as motion, acoustics, environmental conditions and others can be determined by analysis of the interference pattern.

公开(公告)号：US20030218756A1

公开(公告)日：2003-11-27

申请号：US10345671

申请日：2003-01-16

发明人： Zhongping Chen ,  Zhihua Ding ,  J. Stuart Nelson

IPC分类号： G01B011/02

CPC分类号： G01B9/02027 ,  G01B9/0201 ,  G01B9/02035 ,  G01B9/02045 ,  G01B9/0205 ,  G01B9/02091 ,  G01B2290/70

摘要： In optical coherence tomography (OCT), Axial and lateral resolutions are determined by the source coherence length and numerical aperture of the sampling lens, respectively. While axial resolution can be improved using a broadband light source, there is a trade-off between lateral resolution and focusing depth when conventional optical elements are used. The incorporation of an axicon lens into the sample arm of the interferometer overcomes this limitation. Using an axicon lens with a top angle of 160 degrees, 10 nullm or better-lateral resolution is maintained over a focusing depth of at least 6 mm. In addition to high lateral resolution, the focusing spot intensity is approximately constant over a greater depth range.

摘要翻译： 在光学相干断层扫描（OCT）中，轴向和横向分辨率分别由采样透镜的源相干长度和数值孔径决定。 虽然可以使用宽带光源来改善轴向分辨率，但是当使用常规光学元件时，横向分辨率和聚焦深度之间存在折衷。 将透镜透镜并入干涉仪的样品臂中克服了这一限制。 使用顶角为160度的旋转透镜，在至少6毫米的聚焦深度上保持10毫米或更好的横向分辨率。 除了高横向分辨率之外，聚焦光斑强度在较大深度范围内近似恒定。