公开(公告)号：US07864340B2

公开(公告)日：2011-01-04

申请号：US12221883

申请日：2008-08-07

Applicant: Jerome Primot ,  Sabrina Velghe ,  Nicolas Guerineau ,  Riad Haidar ,  Michel Tauvy

Inventor： Jerome Primot ,  Sabrina Velghe ,  Nicolas Guerineau ,  Riad Haidar ,  Michel Tauvy

IPC: G01B9/02

CPC classification number: G01J9/02 ,  G01J2009/0226

Abstract: The method comprises positioning a diffraction grating with a two-dimensional meshing on the path of the beam to be analyzed and processing at least two interferograms of at least two different colors, each interferogram being obtained in a plane from two sub-beams with different diffraction orders. The invention can be used to analyze and correct divided wavefronts.

Abstract translation: 该方法包括在待分析光束的路径上定位具有二维啮合的衍射光栅并处理至少两种不同颜色的至少两个干涉图，每个干涉图在具有不同衍射的两个子光束的平面中获得 命令。 本发明可用于分析和校正划分的波前。

公开(公告)号：US07405830B2

公开(公告)日：2008-07-29

申请号：US11207327

申请日：2005-08-19

Applicant: Seung Woo Kim ,  Hagyong Kihm ,  Jung Jae Park

Inventor： Seung Woo Kim ,  Hagyong Kihm ,  Jung Jae Park

IPC: G01B9/02 ,  G01B11/02

CPC classification number: G01B9/02039 ,  G01B9/02076 ,  G01B9/02081 ,  G01B2290/70 ,  G01J2009/0203 ,  G01J2009/0223 ,  G01J2009/0226

Abstract: The present invention relates to vibration-insensitive point-diffraction interferometry. For the purpose of obtaining high immunity to vibration, a single-mode optical fiber is used to generate the reference wave, by means of point diffraction, directly from a measurement wave reflected from test objects. The capability of vibration desensitization is further strengthened by adding a spatial phase-shift device that enables four interferograms of different amounts of phase shift to be obtained simultaneously with no time delay between interferograms. The present invention may be effectively used in the design of measuring systems for in-line applications where measurements need to be performed in the presence of significant levels of vibration.

Abstract translation: 本发明涉及振动不敏感点衍射干涉测量。 为了获得高的抗振动性，使用单模光纤通过点衍射直接从测试对象反射的测量波产生参考波。 通过添加空间相移装置进一步加强了振动脱敏的能力，该空间相移装置能够在干涉图之间没有时间延迟的同时获得不同量的相移的四个干涉图。 本发明可以有效地用于设计用于需要在显着水平的振动的情况下进行测量的在线应用的测量系统。

公开(公告)号：US5231468A

公开(公告)日：1993-07-27

申请号：US788395

申请日：1991-11-06

Applicant: Vance A. Deason ,  Gordon D. Lassahn

Inventor： Vance A. Deason ,  Gordon D. Lassahn

IPC: G01B9/02 ,  G01J9/02

CPC classification number: G01J9/02 ,  G01B9/0207 ,  G01J2009/0226 ,  G01J2009/0249

Abstract: A method and apparatus resulting in the simplification of phase shifting interferometry by eliminating the requirement to know the phase shift between interferograms or to keep the phase shift between interferograms constant. The present invention provides a simple, inexpensive means to shutter each independent beam of the interferometer in order to facilitate the data acquisition requirements for optical interferometry and phase shifting interferometry. By eliminating the requirement to know the phase shift between interferograms or to keep the phase shift constant, a simple, economical means and apparatus for performing the technique of phase shifting interferometry is provide which, by thermally expanding a fiber optical cable changes the optical path distance of one incident beam relative to another.

Abstract translation: 一种方法和装置，通过消除干涉图之间的相移的要求或者使干涉图之间的相移保持不变，从而简化了相移干涉测量。 本发明提供了一种简单，便宜的方式来对每个干涉仪的独立光束进行快门，以便于光学干涉测量和相移干涉测量的数据采集需求。 通过消除干涉图之间的相位偏移或保持相位偏移的要求，提供了一种用于执行相移干涉测量技术的简单，经济的手段和装置，其通过光纤光缆的热膨胀改变光路距离 相对于另一个入射光束。

公开(公告)号：US4979825A

公开(公告)日：1990-12-25

申请号：US337741

申请日：1989-04-13

Applicant: Katsushi Iwashita

Inventor： Katsushi Iwashita

IPC: G01J9/02 ,  G02F2/00 ,  H04B10/67 ,  H04B10/69

CPC classification number: H04B10/69 ,  G01J9/02 ,  G02F2/00 ,  H04B10/676 ,  G01J2009/0226

Abstract: A system for a Mach-Zender interferometer which eliminates amplitude modulation of the input light and determines the frequency modulation. Two photodetectors in series are used to receive two outputs of two arms of a Mach-Zender interferometer. The outputs of the photodetectors are summed. The path length difference is controlled by a heater which itself is controlled by a controller. The controller selectively controls the heater based on how much non-zero components are present in the output of the photodetectors.

公开(公告)号：US4871254A

公开(公告)日：1989-10-03

申请号：US173548

申请日：1988-03-25

Applicant: Herve Lefevre ,  Didier Rolly

Inventor： Herve Lefevre ,  Didier Rolly

IPC: G01C19/64 ,  G01C19/72 ,  G01J9/02 ,  G01P9/00 ,  G02B6/00 ,  G02F2/02

CPC classification number: G01J9/0246 ,  G01C19/72 ,  G01J2009/0226 ,  G01J2009/0273

Abstract: A method and corresponding device, are provided for detecting the propagation time variations in the ring of an interferometer and includes phase modulation of the contrarotating waves travelling through the ring by means of assymetric square waves at a period twice the initial propagation time, which create level zero phase shift stretches in the modulation of the difference between the two waves emerging from the ring. These level stretches result in pulses in the detected output signal whose width is variable with the propagation time. The invention applies particularly to the control of the wave length of the source of the interferometer, particularly with respect to temperature variations of the source.

Abstract translation: 提供了一种用于检测干涉仪的环中的传播时间变化的方法和相应的装置，并且包括在初始传播时间的两倍的时间期间通过不对称方波在环上行进的反转波的相位调制，其产生水平 零相移在从环中出现的两个波之间的差异的调制中延伸。 这些电平延长导致检测到的输出信号中的脉冲，其宽度随传播时间而变化。 本发明特别适用于对干涉仪源的波长的控制，特别是关于源的温度变化。

公开(公告)号：US11988562B2

公开(公告)日：2024-05-21

申请号：US17701847

申请日：2022-03-23

Applicant: Systems & Technology Research, LLC

Inventor： Scott Bloom

IPC: G01J9/02 ,  G02B5/30

CPC classification number: G01J9/0246 ,  G02B5/3083 ,  G01J2009/0226 ,  G01J2009/0253 ,  G01J2009/0284

Abstract: An interferometer for use in remote sensing systems includes a beam splitter that separates an input wave into a reflected wave, which travels along a first optical path within an upper interferometer arm, and a transmitted wave, which travels along a second optical path within a lower interferometer arm. The reflected and transmitted waves are subsequently recombined by the beam splitter for imaging onto a sensor. A highly dispersive element is incorporated into at least one of the pair of interferometer arms. Due to anomalous dispersion, a frequency shift in a wave transmitted through a dispersive element changes the optical path length within its corresponding arm. As a result, the recombined wave produces an interference pattern with a measurable phase change that can be utilized to calculate the original frequency shift in the input wave with great precision and potential sub-Hertz sensitivity.

公开(公告)号：US09976912B2

公开(公告)日：2018-05-22

申请号：US14686616

申请日：2015-04-14

Applicant: California Institute of Technology

Inventor： James Kent Wallace

IPC: G01J9/00 ,  G01J9/02

CPC classification number: G01J9/0215 ,  G01J9/00 ,  G01J9/02 ,  G01J2009/0226

Abstract: Hybrid sensors comprising Shack-Hartmann Wavefront Sensor (S-HWFS) and Zernike Wavefront Sensor (Z-WFS) capabilities are presented. The hybrid sensor includes a Z-WFS optically arranged in-line with a S-HWFS such that the combined wavefront sensor operates across a wide dynamic range and noise conditions. The Z-WFS may include the ability to introduce a dynamic phase shift in both transmissive and reflective modes.

公开(公告)号：US09863841B2

公开(公告)日：2018-01-09

申请号：US14986560

申请日：2015-12-31

Applicant: Shanghai Institute of Optics And Fine Mechanics, Chinese Academy of Sciences

Inventor： Xiangzhao Wang ,  Feng Tang ,  Guoxian Zhang ,  Shifu Xu

IPC: G01M11/02 ,  G03F7/20 ,  G01J9/02

CPC classification number: G01M11/0271 ,  G01J9/0215 ,  G01J2009/0223 ,  G01J2009/0226 ,  G01J2009/0265 ,  G03F7/706

Abstract: A point diffraction interferometric wavefront aberration measuring device comprising an optical source, an optical splitter, a first light intensity and polarization regulator, a phase shifter, a second light intensity and polarization regulator, an ideal wavefront generator, an object precision adjusting stage, a measured optical system, an image wavefront detection unit, an image precision adjusting stage, and a data processing unit. The center distance between the first output port and the second output port of the ideal wavefront generator is smaller than the diameter of the isoplanatic region of the measured optical system and is greater than the ratio of the diameter of the image point dispersion speckle of the measured optical system over the amplification factor thereof. A method for detecting wavefront aberration of the optical system is also provided by using the device.

公开(公告)号：US20120095711A1

公开(公告)日：2012-04-19

申请号：US13124305

申请日：2009-10-14

Applicant: Mark Foster ,  Alexander Gaeta ,  David Geraghty ,  Michal Lipson ,  Reza Salem ,  Amy Foster

Inventor： Mark Foster ,  Alexander Gaeta ,  David Geraghty ,  Michal Lipson ,  Reza Salem ,  Amy Foster

IPC: G02F1/365 ,  G01J3/00 ,  G02B6/12 ,  G02F1/39 ,  G06F19/00

CPC classification number: G06E3/003 ,  G01J9/00 ,  G01J11/00 ,  G01J2009/0226 ,  G02B27/46

Abstract: There is set forth in one embodiment an apparatus and method for imparting a phase shift to an input waveform for output of a converted waveform. In one embodiment, a phase shift can be provided by four wave mixing of an input waveform and a pump pulse. In one embodiment, there is set forth an apparatus and method for generating a high resolution time domain representation of an input waveform comprising: dispersing the input waveform to generate a dispersed input waveform; subjecting the dispersed input waveform to four wave mixing by combining the dispersed input waveform with a dispersed pump pulse to generate a converted waveform; and presenting the converted waveform to a detector unit. In one embodiment a detector unit can include a spectrometer (spectrum analyzer) for recording of the converted waveform and output of a record representing the input waveform.

Abstract translation: 在一个实施例中提出了一种用于向输入波形施加相移以输出转换波形的装置和方法。 在一个实施例中，可以通过输入波形和泵浦脉冲的四次波混合来提供相移。 在一个实施例中，提出了一种用于产生输入波形的高分辨率时域表示的装置和方法，包括：分散输入波形以产生分散的输入波形; 通过将分散的输入波形与分散的泵浦脉冲组合来对分散的输入波形进行四波混频以产生转换的波形; 并将转换的波形呈现给检测器单元。 在一个实施例中，检测器单元可以包括用于记录转换的波形的光谱仪（频谱分析仪）和表示输入波形的记录的输出。

公开(公告)号：US20110128532A1

公开(公告)日：2011-06-02

申请号：US12958578

申请日：2010-12-02

Applicant: Kenji TAIRA

Inventor： Kenji TAIRA

IPC: G01J1/42

CPC classification number: G01J9/04 ,  G01J2009/0226 ,  G02B6/02042 ,  G02B21/0032 ,  G02B21/0048 ,  G02B21/0076 ,  G02B26/103

Abstract: Provided are a photodetector device and a photodetection method as well as a microscope and an endoscope allowing the heterodyne detection of a desired light to be detected with high sensitivity and at a high SN ratio. A photodetector device comprises a local light emitting unit for generating a local light in temporally unstable interference condition with a light to be detected and a photoelectric conversion unit for generating beat signals between the local light and the light to be detected by photoelectric conversion. The light is detected in heterodyne detection based on an output of the photoelectric conversion unit.

Abstract translation: 提供了一种光电检测器件和光电检测方法以及允许以高灵敏度和高SN比检测期望光的外差检测的显微镜和内窥镜。 光电检测器装置包括：本地发光单元，用于在时间上不稳定的干涉条件下产生局部光，并检测光;以及光电转换单元，用于通过光电转换在本地光和待检测光之间产生拍频信号。 基于光电转换单元的输出，以外差检测方式检测光。