公开(公告)号：US5750901A

公开(公告)日：1998-05-12

申请号：US483006

申请日：1995-06-07

申请人： Victor Vali ,  I-Fu Shih ,  Kenn S. Bates

发明人： Victor Vali ,  I-Fu Shih ,  Kenn S. Bates

IPC分类号： G01B11/16 ,  G01L1/24 ,  G01M11/08

CPC分类号： G01M11/086 ,  G01B11/18 ,  G01L1/242

摘要： A measurement optical fiber is placed into contact with a geological structure, and a reference optical fiber of about the same length is not contacted to the geological structure. An input beam of light is transmitted down the lengths of the measurement and reference optical fibers, and the interference fringes formed between the reflected beams in the two optical fibers are counted to determine the geological displacement, and thence the geologic strain, experienced by the measurement optical fiber. Preferably, multiple pairs of the measurement and reference optical fibers are used, the optical fibers of the various pairs being of different lengths. The difference in displacement measured by any two pairs is a measure of the geological strain in the region between the ends of the two pairs. The multiple pairs are conveniently provided in two optical fiber cables, a measurement cable which contacts the geological structure and a reference cable which extends parallel and adjacent to the measurement cable.

摘要翻译： 测量光纤被放置成与地质结构接触，并且大约相同长度的参考光纤不与地质结构接触。 输入光束沿测量和参考光纤的长度传输，并且计数在两根光纤中的反射光束之间形成的干涉条纹以确定地质位移，并且由此测量经历的地质应变 光纤。 优选地，使用多对测量和参考光纤，各对的光纤具有不同的长度。 通过任何两对测量的位移差异是两对端部之间区域的地质应变的量度。 多对方便地设置在两条光纤电缆中，一条接触地质结构的测量电缆和一条与测量电缆并联延伸的参考电缆。

公开(公告)号：US5041735A

公开(公告)日：1991-08-20

申请号：US475574

申请日：1990-02-06

申请人： David B. Chang ,  Slava A. Pollack ,  Kenn S. Bates ,  I-Fu Shih

发明人： David B. Chang ,  Slava A. Pollack ,  Kenn S. Bates ,  I-Fu Shih

IPC分类号： G01S3/78

CPC分类号： G01S3/7803

摘要： A miniature infrared test target that comprises a heated four-bar test target operated at a high temperature and a physically separated ambient field operated at ambient temperature. A beamsplitter is disposed relative to the test target and the field in a position to combine and transmit images thereof along a common axis. A lens is disposed along the common axis and forms a combined image of the test target and the field at its image plane. Separation of the test and field targets permits miniaturization of the test target while maintaining a temperature difference between the field and the bars that is proportional to the true temperature difference. The target overcomes the difficulty of maintaining an extremely high temperature gradient in the target. It provides a greater contrast range than that provided by conventional miniature targets. The miniature infrared test target is made with surfaces approximating a blackbody, thereby providing immunity from the Narcissus problem and the effects of complicated environmental changes.

公开(公告)号：US5469519A

公开(公告)日：1995-11-21

申请号：US13288

申请日：1993-02-04

申请人： David B. Chang ,  Victor Vali ,  I-Fu Shih

发明人： David B. Chang ,  Victor Vali ,  I-Fu Shih

IPC分类号： G02B6/06 ,  G02B27/46 ,  G02B6/32

CPC分类号： G02B27/46 ,  G02B6/06

摘要： An improved image transmission system which includes an elongate optical waveguide 15 having an input aperture 17 and an output aperture 19. Optical apparatus 11, 13 is provided for injecting a transform of an image into the waveguide. In a specific implementation, the Fourier transform of the image is injected at the input aperture 17. The output image is transformed as well to provide the desired image. When the Fourier components of the image are transmitted, each component propagates at a different velocity. However, the magnitude of the components are preserved and used to reconstruct the image at the output of the waveguide. This allows for the transmission of optical images without digitization with a single, inexpensive waveguide.

摘要翻译： 一种改进的图像传输系统，其包括具有输入孔17和输出孔19的细长光波导15.光学装置11,13被设置用于将图像的变换注入到波导中。 在具体实现中，图像的傅里叶变换在输入孔17处被注入。输出图像也被变换以提供期望的图像。 当传输图像的傅立叶分量时，每个分量以不同的速度传播。 然而，分量的大小被保留并用于在波导的输出处重建图像。 这允许用单个廉价的波导传输光学图像而不进行数字化。

公开(公告)号：US5289266A

公开(公告)日：1994-02-22

申请号：US885066

申请日：1992-05-14

申请人： I-Fu Shih ,  David B. Chang ,  Victor Vali

发明人： I-Fu Shih ,  David B. Chang ,  Victor Vali

IPC分类号： G01B11/06 ,  G01N21/31 ,  G01N21/55 ,  G01N21/84 ,  G01B11/02

CPC分类号： G01N21/8422 ,  G01B11/0616 ,  G01N2021/8427 ,  G01N21/314 ,  G01N21/55

摘要： A nondestructive method and apparatus is disclosed for determining the thickness and composition of a zinc phosphate layer applied to a metal surface, such as sheet metal on an automotive assembly line. The phosphate layer is irradiated with infrared light which is at least partially transmitted through the phosphate layer. Reflections from the upper and lower surfaces of the phosphate layer return a total reflected intensity which is a function of the optical parameters of the phosphate components and the ratio of the components corresponding to the optical parameters. In the event, for example, that a phosphate layer includes two zinc phosphate components, the measure of reflected intensity at two separate wavelengths will be different inasmuch as the optical properties of the zinc phosphate components is also a function of frequency. The measured reflected intensity and its functional dependence upon the ratio of the components within the phosphate layer can be taken together with the known values of the optical parameters of each component to compute the fraction of each component within the phosphate layer.

摘要翻译： 公开了用于确定施加到金属表面的磷酸锌层（例如汽车装配线上的金属板）的厚度和组成的非破坏性方法和装置。 用至少部分透过磷酸盐层的红外光照射磷酸盐层。 从磷酸盐层的上表面和下表面的反射返回总反射强度，其是磷酸盐组分的光学参数和对应于光学参数的组分的比率的函数。 在例如磷酸盐层包含两种磷酸锌成分的情况下，由于磷酸锌成分的光学特性也是频率的函数，所以在两个分开的波长处的反射强度的测量将是不同的。 测量的反射强度及其对磷酸盐层中组分比例的功能依赖性可以与每个组分的光学参数的已知值一起计算，以计算磷酸盐层内每个组分的分数。

公开(公告)号：US5345522A

公开(公告)日：1994-09-06

申请号：US939237

申请日：1992-09-02

申请人： Victor Vali ,  David B. Chang ,  I-Fu Shih

发明人： Victor Vali ,  David B. Chang ,  I-Fu Shih

IPC分类号： G01D5/353 ,  G01H9/00 ,  G01V1/20 ,  G02B6/28 ,  G01B9/02 ,  G01V1/38 ,  H01J5/16

CPC分类号： G01H9/004 ,  G01D5/35383 ,  G01V1/201

摘要： A sensitive towed optical fiber sensor array 50, wherein the fiber sensors (60A-60N) are connected in parallel, and the optical fiber cable (34) is paid out from the towing ship at a velocity about equal to but opposite to the velocity of the towing ship. The fiber sensors (60A-60N) are immune to electromagnetic interference, and the output of the sensors can be isolated readily to the parallel hookup of the sensors. Turbulence and acceleration noise is greatly reduced due to the manner in which the fiber cable (34) is paid out, and crosstalk between sensors is eliminated.

摘要翻译： 一种敏感的牵引光纤传感器阵列50，其中光纤传感器（60A-60N）并联连接，光缆（34）以大约等于但与 牵引船。 光纤传感器（60A-60N）不受电磁干扰的影响，传感器的输出可以很容易地与传感器的并联连接。 由于支付光缆（34）的方式，湍流和加速噪声大大降低，并且消除了传感器之间的串扰。

公开(公告)号：US06166815A

公开(公告)日：2000-12-26

申请号：US634549

申请日：1996-04-18

申请人： Victor Vali ,  I-Fu Shih ,  David B. Chang

发明人： Victor Vali ,  I-Fu Shih ,  David B. Chang

IPC分类号： G01B9/02 ,  G01D5/353

CPC分类号： G01D5/35303 ,  G01B9/02007

摘要： A fiber optic interferometric sensor (150) having constantly high sensitivity by use of two lasers (152, 154) that simultaneously output at first and second wavelengths. By judicious choice of the wavelengths, the optical path length difference between the two interferometer paths (164, 166) can be kept near the maximum slope of the interference fringes for one or the other of the wavelengths. The output from the interferometer (160) is divided between first and second detector arms (170, 130). A filter (172) in the first detector arm passes the first wavelength and rejects the second. A filter (182) in the second detector arm passes the second wavelength and rejects the first. A first detector (174) at the output of the first detector arm reads the interference pattern at the first wavelength. A second detector arm reads the interference pattern at the second wavelength.

摘要翻译： 一种通过使用在第一和第二波长同时输出的两个激光器（152,154）具有不断高灵敏度的光纤干涉测量传感器（150）。 通过明智地选择波长，可以将两个干涉仪路径（164,166）之间的光程长度差保持在干涉条纹的最大斜率附近一个或另一个波长。 来自干涉仪（160）的输出在第一和第二检测器臂（170,130）之间分配。 第一检测器臂中的过滤器（172）通过第一波长并拒绝第二波长。 第二检测器臂中的过滤器（182）通过第二波长并拒绝第一波长。 在第一检测器臂的输出处的第一检测器（174）读取第一波长处的干涉图案。 第二检测器臂读取第二波长处的干涉图案。

公开(公告)号：US5291032A

公开(公告)日：1994-03-01

申请号：US59714

申请日：1993-05-11

申请人： Victor Vali ,  David B. Chang ,  I-Fu Shih ,  Albert F. Lawrence

发明人： Victor Vali ,  David B. Chang ,  I-Fu Shih ,  Albert F. Lawrence

IPC分类号： G01F23/292 ,  G01N15/06

CPC分类号： G01F23/292 ,  Y10S250/907

摘要： An optical fiber evanescent wave fuel sensor, employing a light source with a wavelength selected to be at the strong infrared absorption lines of the fuel, typically hydrocarbons. The amount of light leaking from the optical fiber is an exponential function of the length of the fiber in the liquid, and is independent of the relative indices of refraction of the fuel and fiber cladding material.

摘要翻译： 一种光纤ev逝波燃料传感器，其采用波长选定在燃料的强红外吸收线上的光源，通常为烃类。 从光纤泄漏的光量是液体中纤维长度的指数函数，并且与燃料和纤维包层材料的相对折射率无关。

公开(公告)号：US5212583A

公开(公告)日：1993-05-18

申请号：US818315

申请日：1992-01-08

申请人： Victor Vali ,  David B. Chang ,  I-Fu Shih ,  Bruce R. Youmans

发明人： Victor Vali ,  David B. Chang ,  I-Fu Shih ,  Bruce R. Youmans

IPC分类号： G02F1/03 ,  G02F1/29

CPC分类号： G02F1/29 ,  G02F1/292 ,  G02F1/03 ,  G02F1/0305 ,  G02F2201/12 ,  G02F2202/20 ,  G02F2203/18 ,  G02F2203/24 ,  G02F2203/28

摘要： An adaptive electroopical lens system for use in optical data storage systems, optical phased arrays, laser or other optical projectors, and raster scanning devices, and the like. The invention provides an electrooptical means for scanning an optical beam or moving an optical storage or retrieval point. Beam movement is achieved electrooptically, by changing the index of refraction of an electrooptical material by controlling electric fields applied thereto. A plurality of electrodes are disposed on one surface of the electrooptic material and a ground electrode is disposed on the other. The electrodes are adapted to apply electric fields derived from a voltage source to the electroopic material that selectively change its index of refraction and provides for a predetermined index of refraction profile along at least one dimension thereof, thus forming a lens. By appropriately forming the electrode pattern and properly controlling the voltages applied thereto, differing lens shapes may be formed. Since the response times of the electrooptic materials employed in the present invention are on the order of nanoseconds (10.sup.-9 sec) or less, the intrinsic response frequency of the lens system is 10.sup.9 Hz or more. The present invention thus increases the data storage and retrieval capacity of optical systems in which it is employed.

摘要翻译： 用于光学数据存储系统，光学相控阵列，激光或其它投影仪的光学扫描装置等的适应性电透镜系统。 本发明提供了一种用于扫描光束或移动光学存储或检索点的电光学装置。 通过电光学实现光束运动，通过控制施加于其上的电场来改变电光材料的折射率。 多个电极设置在电光材料的一个表面上，而接地电极设置在另一个表面上。 电极适于将从电压源导出的电场施加到选择性地改变其折射率的电学材料，并且沿其至少一个维度提供预定的折射率分布，从而形成透镜。 通过适当地形成电极图案并适当地控制施加到其上的电压，可以形成不同的透镜形状。 由于本发明中使用的电光材料的响应时间为纳秒（10-9秒）以下，透镜系统的固有响应频率为109Hz以上。 因此，本发明增加了使用它的光学系统的数据存储和检索能力。

公开(公告)号：US5454047A

公开(公告)日：1995-09-26

申请号：US180394

申请日：1994-01-12

申请人： David B. Chang ,  I-Fu Shih

发明人： David B. Chang ,  I-Fu Shih

IPC分类号： G06T9/00 ,  G06K9/76

CPC分类号： G06T9/007

摘要： A system for optically generating expansion coefficients for an image processing function. The invention (10) includes a first optical element (18) for providing a transform of an image provided at a first image plane (16). A second optical arrangement (20) provides a product of the transform of the image and a transform of a convolving function. This product is transformed by a lens (22) to provide an image intensity distribution representative of expansion coefficients resulting from a convolution of the image by the convolving function. In a specific implementation, the convolving function is a wavelet and the intensity distribution is detected to provide the expansion coefficients.

摘要翻译： 一种用于光学地生成用于图像处理功能的扩展系数的系统。 本发明（10）包括用于提供在第一图像平面（16）处提供的图像的变换的第一光学元件（18）。 第二光学布置（20）提供图像的变换和卷积函数的变换的乘积。 该产品由透镜（22）变换以提供表示由卷积函数卷积的图像产生的膨胀系数的图像强度分布。 在具体实现中，卷积函数是小波，并且检测强度分布以提供扩展系数。

公开(公告)号：US5033203A

公开(公告)日：1991-07-23

申请号：US483619

申请日：1990-02-23

申请人： David B. Chang ,  James E. Drummond ,  Slava A. Pollack ,  I-Fu Shih

发明人： David B. Chang ,  James E. Drummond ,  Slava A. Pollack ,  I-Fu Shih

IPC分类号： B05C9/12 ,  B05C9/14 ,  B05D3/02 ,  B05D3/06 ,  F26B3/28 ,  F26B3/30

CPC分类号： F26B3/28 ,  F26B3/305

摘要： An improved curing oven using Wellsbach conversion is disclosed. The present invention 10 provides an improved curing oven which cures materials with electromagnetic radiation in the ultraviolet region. The invention consists of a surface 12 lined with a layer of material 14 effective to radiate ultraviolet radiation in response to the application of infrared radiation. In a specific illustrative implementation, the invention 10 includes a second surface 18 overlying the first surface 12 providing a passageway therebetween. The oven temperature is set and maintained by a conventional temperature controller 20. The temperature controller 20 measures the oven temperature and controls a valve 22 which adjusts the gas pressure from a gas supply 24 to a set of oven burners 26. Air is supplied through inlet ports 28 included in the second surface 18.