公开(公告)号：US20130135614A1

公开(公告)日：2013-05-30

申请号：US13574484

申请日：2011-01-24

申请人： Adam Wax ,  Robert N. Graf ,  Francisco E. Robles

发明人： Adam Wax ,  Robert N. Graf ,  Francisco E. Robles

IPC分类号： G01B9/02

CPC分类号： G01J3/453 ,  G01B9/02044 ,  G01B9/02084 ,  G01B9/02087 ,  G01B9/02091 ,  G01J3/45 ,  G01J2003/4538 ,  G01N21/49

摘要： Current apparatuses and methods for analysis of spectroscopic optical coherence tomography (SOCT) signals suffer from an inherent tradeoff between time (depth) and frequency (wavelength) resolution. In one non-limiting embodiment, multiple or dual window (DW) apparatuses and methods for reconstructing time-frequency distributions (TFDs) that applies two windows that independently determine the optical and temporal resolution is provided. For example, optical resolution may relate to scattering information about a sample, and temporal resolution may be related to absorption or depth related information. The effectiveness of the apparatuses and methods is demonstrated in simulations and in processing of measured OCT signals that contain fields which vary in time and frequency. The DW technique may yield TFDs that maintain high spectral and temporal resolution and are free from the artifacts and limitations commonly observed with other processing methods.

摘要翻译： 分光光学相干断层扫描（SOCT）信号的分析的现有装置和方法遭受时间（深度）和频率（波长）分辨率之间固有的折中。 在一个非限制性实施例中，提供了用于重建施加独立地确定光学和时间分辨率的两个窗口的时间频率分布（TFD）的多重或双窗口（DW）装置和方法。 例如，光学分辨率可以涉及关于样本的散射信息，并且时间分辨率可以与吸收或深度相关信息相关。 在模拟和处理包含在时间和频率上变化的场的测量的OCT信号中证明了装置和方法的有效性。 DW技术可以产生维持高光谱和时间分辨率的TFD，并且不存在通常用其它处理方法观察到的伪像和限制。

公开(公告)号：US20230408337A1

公开(公告)日：2023-12-21

申请号：US18320172

申请日：2023-05-18

申请人： WUHAN UNIVERSITY

发明人： Ruyi WEI

IPC分类号： G01J3/453 ,  G01J3/02 ,  G01J3/28 ,  G01J3/06

CPC分类号： G01J3/4535 ,  G01J3/0208 ,  G01J3/021 ,  G01J2003/4538 ,  G01J3/06 ,  G01J2003/062 ,  G01J2003/064 ,  G01J3/2823

摘要： The present invention belongs to the field of optical technology, disclosing a quadrilateral common-path time-modulated interferometric spectral imaging device and method. The present invention sets up a moving mirror scanning mechanism in a quadrilateral common path interferometer for generating optical path differences that vary with time, so that the quadrilateral common-path time-modulated interferometric spectral imaging device operates in the staring observation mode. The invention can make the quadrilateral common-path time-modulated interferometric spectral imaging device not only retain the advantages of common optical path spectroscopic technology, but also obtain high spectral resolution.

公开(公告)号：US09989414B2

公开(公告)日：2018-06-05

申请号：US13853896

申请日：2013-03-29

申请人： Agilent Technologies, Inc.

发明人： Adam Kleczewski

IPC分类号： G01B9/02 ,  G01J3/453 ,  H01S5/14 ,  G01J3/02

CPC分类号： G01J3/453 ,  G01J3/027 ,  G01J2003/4538 ,  H01S5/14

摘要： An optical measurement method in which a series of light pulses are generated using a pulsed laser having a set of different mode hop sequences (e.g., an external-cavity quantum cascade laser (EC-QCL)), the light pulses are detected with the detector to generate a respective pulse data set for each of the light pulses, and the pulse data sets are sorted into classes based on correlation coefficients. Sorting the pulse data sets into classes allows the pulse data sets originating from each of the mode hop sequences of the pulsed laser to be treated independently of the pulse data sets originating from others of the mode hop sequences in subsequent processing.

公开(公告)号：US09689745B2

公开(公告)日：2017-06-27

申请号：US15050368

申请日：2016-02-22

申请人： Duke University

发明人： Adam Wax ,  Robert N. Graf ,  Francisco E. Robles

IPC分类号： G01J3/45 ,  G01B9/02 ,  G01J3/453 ,  G01N21/49

CPC分类号： G01J3/453 ,  G01B9/02044 ,  G01B9/02084 ,  G01B9/02087 ,  G01B9/02091 ,  G01J3/45 ,  G01J2003/4538 ,  G01N21/49

摘要： Current apparatuses and methods for analysis of spectroscopic optical coherence tomography (SOCT) signals suffer from an inherent tradeoff between time (depth) and frequency (wavelength) resolution. In one non-limiting embodiment, multiple or dual window (DW) apparatuses and methods for reconstructing time-frequency distributions (TFDs) that applies two windows that independently determine the optical and temporal resolution is provided. For example, optical resolution is provided. For example, optical resolution may relate to scattering information about a sample, and temporal resolution may be related to absorption or depth related information. The effectiveness of the apparatuses and methods is demonstrated in simulations and in processing of measured OCT signals that contain fields which vary in time and frequency. The DW technique may yield TFDs that maintain high spectral and temporal resolution and are free from the artifacts and limitations commonly observed with other processing methods.

公开(公告)号：US20170023410A1

公开(公告)日：2017-01-26

申请号：US15206266

申请日：2016-07-09

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： SEIJI NISHIWAKI

IPC分类号： G01J3/453 ,  G01J3/02

CPC分类号： G01J3/4531 ,  G01J3/0205 ,  G01J3/0208 ,  G01J3/0229 ,  G01J3/10 ,  G01J2003/102 ,  G01J2003/104 ,  G01J2003/4538

摘要： In one aspect, an apparatus includes a first light source that applies first light having a first wavelength as a center wavelength to an object, a second light source that applies second light having a second wavelength as a center wavelength longer than the first wavelength to the object, an optical filter that includes first and second regions and that transmits third light produced by the first and second light each passed through or reflected by the object, first and second optical detectors that determine first and second amounts, respectively, of the third light passed through the first and second regions. The transmission ranges of spectral transmission curves of the first and second regions are located between the first wavelength and the second wavelength. The spectral transmission curve of the first region has a width at half maximum different from that of the spectral transmission curve of the second region.

摘要翻译： 在一个方面中，一种装置包括：第一光源，其将具有第一波长的第一光作为中心波长施加到物体;第二光源，将具有第二波长的第二光作为比第一波长长的中心波长， 物体，包括第一和第二区域并且透射由物体通过或反射的第一和第二光产生的第三光的滤光器，分别确定第三光的第一和第二量的第一和第二光学检测器 通过了第一个和第二个地区。 第一和第二区域的光谱传输曲线的透射范围位于第一波长和第二波长之间。 第一区域的光谱透射曲线具有与第二区域的光谱透射曲线的宽度不同的半值宽度。

公开(公告)号：US09274001B2

公开(公告)日：2016-03-01

申请号：US13574484

申请日：2011-01-24

申请人： Adam Wax ,  Robert N. Graf ,  Francisco E. Robles

发明人： Adam Wax ,  Robert N. Graf ,  Francisco E. Robles

IPC分类号： G01J3/45 ,  G01B9/02 ,  G01N21/49 ,  G01J3/453

CPC分类号： G01J3/453 ,  G01B9/02044 ,  G01B9/02084 ,  G01B9/02087 ,  G01B9/02091 ,  G01J3/45 ,  G01J2003/4538 ,  G01N21/49

摘要： Current apparatuses and methods for analysis of spectroscopic optical coherence tomography (SOCT) signals suffer from an inherent tradeoff between time (depth) and frequency (wavelength) resolution. In one non-limiting embodiment, multiple or dual window (DW) apparatuses and methods for reconstructing time-frequency distributions (TFDs) that applies two windows that independently determine the optical and temporal resolution is provided. For example, optical resolution may relate to scattering information about a sample, and temporal resolution may be related to absorption or depth related information. The effectiveness of the apparatuses and methods is demonstrated in simulations and in processing of measured OCT signals that contain fields which vary in time and frequency. The DW technique may yield TFDs that maintain high spectral and temporal resolution and are free from the artifacts and limitations commonly observed with other processing methods.

摘要翻译： 分光光学相干断层扫描（SOCT）信号的分析的现有装置和方法遭受时间（深度）和频率（波长）分辨率之间固有的折中。 在一个非限制性实施例中，提供了用于重建施加独立地确定光学和时间分辨率的两个窗口的时间频率分布（TFD）的多重或双窗口（DW）装置和方法。 例如，光学分辨率可以涉及关于样本的散射信息，并且时间分辨率可以与吸收或深度相关信息相关。 在模拟和处理包含在时间和频率上变化的场的测量的OCT信号中证明了装置和方法的有效性。 DW技术可以产生维持高光谱和时间分辨率的TFD，并且不存在通常用其它处理方法观察到的伪像和限制。

公开(公告)号：US20150002848A1

公开(公告)日：2015-01-01

申请号：US14372093

申请日：2013-01-15

申请人： FEMTOLASERS PRODUCTIONS GMBH

发明人： Gabriel-Florin Tempea

IPC分类号： G01J3/45 ,  G01N21/25

CPC分类号： G01J3/45 ,  E01H5/045 ,  G01J3/4531 ,  G01J2003/283 ,  G01J2003/451 ,  G01J2003/4538 ,  G01M11/005 ,  G01N21/25 ,  G01N21/45 ,  G01N2021/4126 ,  G01N2201/126 ,  G02B1/115 ,  G02B5/0825

摘要： Method and device for optical inspection of a sample using spectral interferometry, wherein a beam (2″) emitted by a radiation source (1) is directed onto the sample (5) and a reference beam (2′) is directed onto a reference sample (4), and the spectral interference of both beams after being reflected on the samples or after passing the samples is recorded by means of a spectrograph (6); the interferogram I(ω) thus obtained is numerically derived with respect to the angular frequency ω. For the function I′(ω) thus obtained the zeros ωi are calculated numerically as solutions to the equation I′(ω)=0 and the frequency-dependent group delay τ(ω) is then calculated from the zeros ωi according to the equation τ(ωn)=π/(ωi+1−ωi), wherein i=1, 2 . . . and ωn=(ωi+1+ωi)2.

摘要翻译： 用于使用光谱干涉测量法对样品进行光学检查的方法和装置，其中由辐射源（1）发射的光束（2“）被引导到样品（5）上，并且参考光束（2'）被引导到参考样品 （4），并且两个光束在样品上反射之后或在通过样品之后的光谱干涉通过光谱仪（6）记录; 这样获得的干涉图I（ω）相对于角频率ω被数值地导出。 对于由此获得的函数I'（ω），零数值被计算为等式I'（ω）= 0的解，并且然后根据等式从零的ωi计算频率相关组延迟τ（ω） τ（ωn）=＆pgr; /（ωi+ 1-ωi），其中i = 1,2。 。 。 和ωn=（ωi+ 1 +ωi）2。

公开(公告)号：US20240337536A1

公开(公告)日：2024-10-10

申请号：US18413015

申请日：2024-01-15

申请人： Shanghai Jiao Tong University

发明人： Liangjun LU ,  Tianyu CHENG ,  Linjie ZHOU ,  Jianping CHEN ,  Jiao LIU

IPC分类号： G01J3/45 ,  G01J3/453 ,  G02F1/21 ,  G02F1/225

CPC分类号： G01J3/45 ,  G02F1/212 ,  G02F1/2252 ,  G01J2003/4538

摘要： An on-chip Fourier transform spectrometer based on a double-layer spiral waveguide comprises, in order, a waveguide input coupler, a 1×N optical splitter, N double-layer waveguide Y-branch structures, N double-layer spiral waveguides with incremental lengths, N double-layer waveguide Y-branch structures arranged in opposite directions, and N germanium-silicon detectors. The group index difference between the odd mode and the even mode in the double-layer waveguide makes the double-layer spiral waveguide function like an asymmetric Mach-Zehnder interferometer. N double-layer spiral waveguides with incremental lengths are used to achieve a spatial heterodyne based Fourier transform spectrometer. Spectral reconstruction from the measured interference fringes can be achieved by a regression algorithm. The invention meets the application need for miniaturization and portability of Fourier transform spectrometers, and has lower temperature sensitivity compared with the existing on-chip spectrometers on the silicon platform.

公开(公告)号：US20240319010A1

公开(公告)日：2024-09-26

申请号：US18186906

申请日：2023-03-20

申请人： THERMO ELECTRON SCIENTIFIC INSTRUMENTS LLC

发明人： John Iverson ,  Garry Ritter ,  Pete Knudtson ,  Eric Schwartz

IPC分类号： G01J3/453 ,  G01J3/06

CPC分类号： G01J3/4535 ,  G01J3/06 ,  G01J2003/064 ,  G01J2003/4538

摘要： Interfering internal beams can be used to generate an internal reference interferogram. This interferogram can be used to compensate for changes in FTIR instrument performance in response to variable environmental conditions or other instrument variations. Acquisition of such internal interferograms can be done during, after, or prior to acquisition of actual sample data.

公开(公告)号：US20240142307A1

公开(公告)日：2024-05-02

申请号：US18542051

申请日：2023-12-15

申请人： Topcon Corporation

发明人： Xiang WEI ,  Tony KO

IPC分类号： G01J3/453 ,  G01J3/28

CPC分类号： G01J3/453 ,  G01J3/2823 ,  G01J2003/4538

摘要： A full-range imaging method doubles imaging range of conventional techniques by removing mirror images of an imaged object that limit conventional images to a “half-range” and that are caused in part by the loss of phase information in a detected signal. Phase information of the detected signal is reconstructed with an averaging technique based on a modulated phase induced in the detected signal during scanning.