公开(公告)号：US20110317170A1

公开(公告)日：2011-12-29

申请号：US13150404

申请日：2011-06-01

Applicant: Yung-Chieh Hsieh ,  Chiayu Ai

Inventor： Yung-Chieh Hsieh ,  Chiayu Ai

IPC: G01B9/02 ,  G02B26/06

CPC classification number: H04B10/677 ,  G01B2290/35

Abstract: The invention provides a wedge pair suitable for use in interferometers. The wedge pair produces a phase shift between beams of light propagating in the interferometer. The invention includes a wedge pair and a mechanism for translating a first wedge of the pair with respect to a second wedge of the pair, where the first wedge has the same wedge angle and material of the second wedge and where the vertex of the first wedge and the vertex of the second wedge are pointed in opposite directions.

Abstract translation: 本发明提供一种适用于干涉仪的楔形对。 楔形对产生在干涉仪中传播的光束之间的相移。 本发明包括楔形对和用于相对于该对的第二楔形物平移第一楔形物的机构，其中第一楔形物具有与第二楔形物相同的楔角和材料，并且其中第一楔形物的顶点 并且第二楔的顶点指向相反的方向。

公开(公告)号：US5452088A

公开(公告)日：1995-09-19

申请号：US210671

申请日：1994-03-18

Applicant: Chiayu Ai

Inventor： Chiayu Ai

IPC: G01B9/02

CPC classification number: G01B9/02007 ,  G01B9/02057

Abstract: Fizeau interferometer that utilizes a multimode laser as a light source for testing transparent thin-plate samples. As a result of multimode linear laser operation, interference fringes are obtained only when the optical path difference between the reference surface and test surface is equal to twice a multiple of the laser's effective cavity length. By judicially selecting the multimode spectrum of operation and the effective cavity length of the laser, the interferometer may be calibrated to produce interference fringes at a workable separation between the reference and test surfaces without ghost interference fringes from the far surface of the thin-plate sample. Another embodiment of the invention alternatively utilizes two linear lasers with different effective cavity lengths to eliminate ghost interference fringes when the optical thickness of the thin-plate is equal to a multiple of one laser's effective cavity length.

Abstract translation: Fizeau干涉仪利用多模激光器作为测试透明薄板样品的光源。 作为多模线性激光器操作的结果，只有当参考表面和测试表面之间的光程差等于激光器的有效腔体长度的两倍时才能获得干涉条纹。 通过司法选择操作的多模光谱和激光器的有效腔长度，可以校准干涉仪以在参考和测试表面之间的可工作的间隔处产生干涉条纹，而不会从薄板样品的远表面产生重影干涉条纹 。 本发明的另一实施例可替代地使用具有不同有效腔长度的两个线性激光器，以在薄板的光学厚度等于一个激光器的有效腔长度的倍数时消除重影干涉条纹。

公开(公告)号：US5321497A

公开(公告)日：1994-06-14

申请号：US848309

申请日：1992-03-09

Applicant: Chiayu Ai ,  Yiping Xu

Inventor： Chiayu Ai ,  Yiping Xu

IPC: G01B9/02 ,  G01B11/24 ,  G01B11/00

CPC classification number: G01B11/2441 ,  G01B9/02078 ,  G01B9/02083

Abstract: A method and system are described for performing phase unwrapping integrations in a phase-shifting interferometric profiling operation. The disclosed technique uses one characteristic of modulation or slope distributions to segment the modulation or slope histogram into a plurality of sections. The principal phase values are divided into a plurality of groups in accordance with corresponding modulation or slope histogram sections. The phase unwrapping integrations are performed in such an order that the areas with a high probability of containing a 2.pi. discontinuity are contained in the last group integrated. Thus, inaccuracies due to 2.pi. discontinuities do not "propagate" to earlier-computed phase values computed by the phase unwrapping algorithm.

Abstract translation: 描述了用于在相移干涉分析操作中执行相位展开积分的方法和系统。 所公开的技术使用调制或斜率分布的一个特征将调制或斜率直方图分割成多个部分。 根据相应的调制或斜率直方图部分，将主相位值分成多个组。 按照这样的顺序执行相位展开积分，使得在最后一个组合中包含具有高2概率不连续性概率的区域。 因此，由于2 pi不连续性引起的不准确性不会“传播”到由相位解包算法计算的较早计算的相位值。

公开(公告)号：US20110211194A1

公开(公告)日：2011-09-01

申请号：US13103291

申请日：2011-05-09

Applicant: YUNG-CHIEH HSIEH ,  Chiayu Ai

Inventor： YUNG-CHIEH HSIEH ,  Chiayu Ai

IPC: G01J3/28

CPC classification number: G01J3/06 ,  G01J3/02 ,  G01J3/021 ,  G01J3/0289 ,  G01J3/2889 ,  G01J3/32 ,  G01J2003/1243

Abstract: An optical spectrum analyzer is implemented with a detector combined with a tunable filter mounted on a stage capable of 360-degree rotation at a constant velocity. Because of the constant rate of angular change, different portions of the input spectrum are detected at each increment of time as a function of filter position, which can be easily measured with an encoder for synchronization purposes. The unidirectional motion of the mirror permits operation at very high speeds with great mechanical reliability. The same improvements may be obtained using a diffraction grating or a prism, in which case the detector or an intervening mirror may be rotated instead of the grating or prism.

Abstract translation: 光谱分析仪采用与安装在能够以恒定速度360度旋转的平台上的可调滤波器组合的检测器。 由于角度变化的恒定速率，输入频谱的不同部分在每个增量时间上被检测为滤波器位置的函数，这可以通过编码器容易地用于同步目的来测量。 镜子的单向运动允许以非常高的速度运行，具有很大的机械可靠性。 可以使用衍射光栅或棱镜获得相同的改进，在这种情况下，可以旋转检测器或中间镜来代替光栅或棱镜。

公开(公告)号：US07961316B2

公开(公告)日：2011-06-14

申请号：US11810873

申请日：2007-06-07

Applicant: Yung-Chieh Hsieh ,  Chiayu Ai

Inventor： Yung-Chieh Hsieh ,  Chiayu Ai

IPC: G01J3/28

CPC classification number: G01J3/06 ,  G01J3/02 ,  G01J3/021 ,  G01J3/0289 ,  G01J3/2889 ,  G01J3/32 ,  G01J2003/1243

Abstract: An optical spectrum analyzer is implemented with a detector combined with a tunable filter mounted on a stage capable of 360-degree rotation at a constant velocity. Because of the constant rate of angular change, different portions of the input spectrum are detected at each increment of time as a function of filter position, which can be easily measured with an encoder for synchronization purposes. The unidirectional motion of the mirror permits operation at very high speeds with great mechanical reliability. The same improvements may be obtained using a diffraction grating or a prism, in which case the detector or an intervening mirror may be rotated instead of the grating or prism.

Abstract translation: 光谱分析仪采用与安装在能够以恒定速度360度旋转的平台上的可调滤波器组合的检测器。 由于角度变化的恒定速率，输入频谱的不同部分在每个增量时间上被检测为滤波器位置的函数，这可以通过编码器容易地用于同步目的来测量。 镜子的单向运动允许以非常高的速度运行，具有很大的机械可靠性。 可以使用衍射光栅或棱镜获得相同的改进，在这种情况下，可以旋转检测器或中间镜来代替光栅或棱镜。

公开(公告)号：US06816315B1

公开(公告)日：2004-11-09

申请号：US10287340

申请日：2002-11-04

Applicant: Chiayu Ai ,  Yung-Chieh Hsieh ,  Dar-Yuan Song

Inventor： Chiayu Ai ,  Yung-Chieh Hsieh ,  Dar-Yuan Song

IPC: G02B2714

CPC classification number: G02B26/0875

Abstract: A parallel glass plate mounted on a rotating fixture is used to precisely control the optical path length of a light beam. The glass plate refracts the incident optical signal to increase the length of its optical path as a function of the angle of incidence. The device can easily achieve a precision in the order of nanometers and is particularly suitable to fine tune the cavity length of a resonator and the optical path difference of an interferometer. Accordingly, the preferred application of the invention is in an interferometric interleaver. The glass plate can also be coated with a partially reflective coating to attenuate the optical signal passing therethrough. By judiciously selecting the refractive index, the thermal coefficient of refraction, and the coefficient of thermal expansion of the glass, thermal effects may be virtually eliminated.

Abstract translation: 安装在旋转夹具上的平行玻璃板用于精确地控制光束的光路长度。 玻璃板折射入射光信号以增加其光路的长度作为入射角的函数。 该器件可以容易地达到纳米级的精度，并且特别适用于微调谐振器的腔长度和干涉仪的光程差。 因此，本发明的优选应用在干涉式交织器中。 玻璃板也可以涂覆有部分反射涂层，以衰减通过其中的光信号。 通过明智地选择折射率，热折射系数和玻璃的热膨胀系数，可以实际上消除热效应。

公开(公告)号：US5064286A

公开(公告)日：1991-11-12

申请号：US531025

申请日：1990-05-31

Applicant: Chiayu Ai ,  John B. Hayes

Inventor： Chiayu Ai ,  John B. Hayes

IPC: G01B9/02 ,  G01B11/26

CPC classification number: G01B11/26 ,  G01B9/02068 ,  G01B9/02072

Abstract: A method and apparatus is disclosed for aligning a reflective surface with an alignment axis in a representative environment of an interferometer. An image of the reflective surface is focused onto a diffuse screen to form a spot image thereon. Rays of the spot image emanating from the diffuse screen are collimated. Some of the collimated rays are focused onto a detector to form a non-inverted image spot. A portion of the collimated rays are intercepted and inverted by means of an image inverter aligned with the alignment axis. The inverted rays are focused onto the detector to form an inverted image spot. The reflecting surface is moved so as to cause the inverted image spot and the non-inverted image spot to coincide, at which point the reflecting surface is aligned with the alignment axis.

Abstract translation: 公开了一种在干涉仪的代表性环境中将反射表面与对准轴对准的方法和装置。 将反射表面的图像聚焦到漫射屏幕上以在其上形成斑点图像。 从漫射屏幕发出的斑点图像的光线被准直。 一些准直光线聚焦在检测器上以形成非反转图像点。 准直光线的一部分通过与对准轴对齐的图像逆变器被截取和反转。 反射的光线被聚焦到检测器上以形成反转的图像斑点。 移动反射表面以使反转的图像点和非反转的图像点重合，此时反射表面与对准轴线对准。

公开(公告)号：US20070285659A1

公开(公告)日：2007-12-13

申请号：US11810873

申请日：2007-06-07

Applicant: Yung-Chieh Hsieh ,  Chiayu Ai

Inventor： Yung-Chieh Hsieh ,  Chiayu Ai

IPC: G01J3/06 ,  G01J3/28

CPC classification number: G01J3/06 ,  G01J3/02 ,  G01J3/021 ,  G01J3/0289 ,  G01J3/2889 ,  G01J3/32 ,  G01J2003/1243

Abstract: An optical spectrum analyzer is implemented with a detector combined with a tunable filter mounted on a stage capable of 360-degree rotation at a constant velocity. Because of the constant rate of angular change, different portions of the input spectrum are detected at each increment of time as a function of filter position, which can be easily measured with an encoder for synchronization purposes. The unidirectional motion of the mirror permits operation at very high speeds with great mechanical reliability. The same improvements may be obtained using a diffraction grating or a prism, in which case the detector or an intervening mirror may be rotated instead of the grating or prism.

Abstract translation: 光谱分析仪采用与安装在能够以恒定速度360度旋转的平台上的可调滤波器组合的检测器。 由于角度变化的恒定速率，输入频谱的不同部分在每个增量时间上被检测为滤波器位置的函数，这可以通过编码器容易地用于同步目的来测量。 镜子的单向运动允许以非常高的速度运行，具有很大的机械可靠性。 可以使用衍射光栅或棱镜获得相同的改进，在这种情况下，可以旋转检测器或中间镜来代替光栅或棱镜。

公开(公告)号：US07286757B1

公开(公告)日：2007-10-23

申请号：US10758408

申请日：2004-01-14

Applicant: Yung-Chieh Hsieh ,  Chiayu Ai

Inventor： Yung-Chieh Hsieh ,  Chiayu Ai

IPC: H04B10/08 ,  H04B10/06

CPC classification number: H04B10/07953

Abstract: A wavelength beam splitter (WBS) is combined with a conventional tunable filter to sequentially select different channels in a multi-channel communication system. The WBS is characterized by a periodic spectral response with period equal to the channel spacing of the ITU grid. Preferably, the WBS consists of an optical cavity with an optical path length that produces a free-spectral range substantially equal to the channel spacing of the ITU grid. The WBS is used to separate the signal in each channel passband from the noise in the corresponding channel stopband. This provides a signal and a noise output for each channel. A tunable filter is used to scan the channels of the ITU grid sequentially and provide output signals for a single channel at a time. Therefore, a much smaller frequency bandwidth needs to be measured at a time and a less expensive detector may be used.

Abstract translation: 波长分束器（WBS）与传统的可调滤波器组合，以在多声道通信系统中顺序地选择不同的声道​​。 WBS的特征在于具有周期等于ITU网格的信道间隔的周期性频谱响应。 优选地，WBS由具有光路长度的光腔组成，该光腔长度产生基本上等于国际电联网格的信道间隔的自由光谱范围。 WBS用于将每个信道通带中的信号与相应信道阻带中的噪声分离。 这为每个通道提供信号和噪声输出。 可调谐滤波器用于顺序地扫描ITU网络的信道，并一次为单个信道提供输出信号。 因此，需要一次测量更小的频率带宽，并且可以使用较便宜的检测器。

公开(公告)号：US20050270544A1

公开(公告)日：2005-12-08

申请号：US11146614

申请日：2005-06-06

Applicant: Yung-Chieh Hsieh ,  Chiayu Ai ,  Chih-Hung Chien

Inventor： Yung-Chieh Hsieh ,  Chiayu Ai ,  Chih-Hung Chien

IPC: G01B9/02 ,  G02B6/34 ,  H04B10/18

CPC classification number: G02B6/29358 ,  G02B6/29386 ,  H04B10/25133

Abstract: Optical interferometers with variable dispersion are shown. These interferometers are useful as optical interleavers and through the control of their design, are made to have negative and near-zero dispersion. The N-type interleaver has a negative dispersion slope near the center of the pass band. The Z-type interleaver has a dispersion that is close to zero within the pass band. These interleavers can be arranged in various systems to produce low dispersion optical networks. The non-linear phase etalons in the N- and Z-type interleavers taught herein contribute to the device dispersion. The N-Type interleaver includes a linear cavity length that is 1.5 times that of a non-linear cavity. The Z-type interleaver includes two non-linear cavities that are out of phase with each other such that the net dispersion is close to zero.

Abstract translation: 示出了具有可变色散的光学干涉仪。 这些干涉仪可用作光学交织器并且通过其设计的控制被制成具有负的和接近零的色散。 N型交错器在通带中心附近具有负色散斜率。 Z型交织器在通带内具有接近于零的色散。 这些交织器可以布置在各种系统中以产生低色散光网络。 这里教导的N型和Z型交织器中的非线性相位标准具有助于器件分散。 N型交错器包括与非线性腔的1.5倍的线性腔长度。 Z型交错器包括彼此不同相的两个非线性空腔，使得净色散接近于零。