公开(公告)号：EP0423903B1

公开(公告)日：1995-11-02

申请号：EP90202843.0

申请日：1985-06-25

申请人： PHOTONETICS, INC.

发明人： Saaski, Elric W. ,  Hartl, James C.

IPC分类号： G01D5/26 ,  G01L9/00 ,  G01J3/26 ,  G01N21/45 ,  G01K11/12

CPC分类号： G01L9/0079 ,  G01D5/268 ,  G01J3/26 ,  G01K11/12 ,  G01N21/45 ,  G01N21/75 ,  G01N21/7703 ,  G01N21/7746 ,  G01N21/80 ,  G01N21/81 ,  G01N2021/0385

公开(公告)号：EP0411106B1

公开(公告)日：1997-12-17

申请号：EP90904010.7

申请日：1990-02-21

申请人： PHOTONETICS, INC.(State of Delaware)

发明人： SAASKI, Elric, W. ,  LAWRENCE, Dale, M.

IPC分类号： G01R15/24 ,  G01R19/03

CPC分类号： G01R1/071 ,  G01R19/03

摘要： A thermo-optical current sensor includes a resistive or semiconducting sensing element that has an optical property that varies as a function of temperature. Current to be measured flows through the sensing element thereby causing heating that is detected by a change in the optical property. The sensing element may be either a resistive or semiconducting material having a temperature dependent optical property or a resistive or semiconducting material that is in thermal contact with an optical temperature sensor. The thermo-optical current sensor may be used as a field meter to measure the intensity of an electromagnetic field or as a current meter to measure the current flowing through a power line.

公开(公告)号：EP0423903A3

公开(公告)日：1991-07-17

申请号：EP90202843.0

申请日：1985-06-25

申请人： PHOTONETICS, INC.

发明人： Saaski, Elric W. ,  Hartl, James C.

IPC分类号： G01D5/26 ,  G01L9/00 ,  G01J3/26 ,  G01N21/45 ,  G01K11/12

CPC分类号： G01L9/0079 ,  G01D5/268 ,  G01J3/26 ,  G01K11/12 ,  G01N21/45 ,  G01N21/75 ,  G01N21/7703 ,  G01N21/7746 ,  G01N21/80 ,  G01N21/81 ,  G01N2021/0385

摘要： Physical changes induced in the spectral modulation sensor's optically resonant structure by the physical parameter being measured cause microshifts of its reflectivity and transmission curves, and of the selected operating segment(s) thereof being used, as a function of the physical parameter being measured. The operating segments have a maximum length and a maximum microshift of less than about one resonance cycle in length for unambiguous output from the sensor. The input measuring light wavelength(s) are selected to fall within the operating segment(s) over the range of values of interest for the physical parameter being measured. The output light from the sensor's optically resonant structure is spectrally modulated by the optically resonant structure as a function of the physical parameter being measured. The spectrally modulated output light is then converted into analog electrical measuring output signals by detection means. In one form, a single optical fiber carries both input light to and output light from the optically resonant structure. When more than one input measuring light wavelength is used, means may also be provided to divide the input light wavelengths into two portions and then take the ratio thereof. This provides several advantages simultaneously, such as enabling longer operating segments and microshifts to be used for greater sensitivity or detection range, and also eliminates certain errors caused by fluctuations in input light intensity or by changes in light intensity caused by optical fiber bending and optical fiber connectors.

摘要翻译： 通过测量的物理参数在光谱调制传感器的光学谐振结构中引起的物理变化引起其反射率和透射曲线及其所选择的操作段（一个或多个）的微动作为所测量的物理参数的函数。 对于来自传感器的明确输出，操作段具有最大长度和小于约一个谐振周期长度的最大微移。 输入的测量光波长被选择为落在所测量的物理参数的感兴趣值范围内的操作段内。 来自传感器光学谐振结构的输出光根据被测量的物理参数由光学谐振结构进行光谱调制。 然后通过检测装置将光谱调制的输出光转换成模拟电测量输出信号。 在一种形式中，单个光纤承载输入光并输出来自光学谐振结构的光。 当使用多于一个输入测量光波长时，还可以提供将输入光波长分成两部分然后取其比值的装置。 这同时提供了几个优点，例如使得更长的操作段和微距可以用于更高的灵敏度或检测范围，并且还消除了由输入光强度的波动或由光纤弯曲和光纤引起的光强度变化引起的某些误差 连接器。

公开(公告)号：EP0423903A2

公开(公告)日：1991-04-24

申请号：EP90202843.0

申请日：1985-06-25

申请人： PHOTONETICS, INC.

发明人： Saaski, Elric W. ,  Hartl, James C.

IPC分类号： G01D5/26 ,  G01L9/00 ,  G01J3/26 ,  G01N21/45 ,  G01K11/12

CPC分类号： G01L9/0079 ,  G01D5/268 ,  G01J3/26 ,  G01K11/12 ,  G01N21/45 ,  G01N21/75 ,  G01N21/7703 ,  G01N21/7746 ,  G01N21/80 ,  G01N21/81 ,  G01N2021/0385

摘要： Physical changes induced in the spectral modulation sensor's optically resonant structure by the physical parameter being measured cause microshifts of its reflectivity and transmission curves, and of the selected operating segment(s) thereof being used, as a function of the physical parameter being measured. The operating segments have a maximum length and a maximum microshift of less than about one resonance cycle in length for unambiguous output from the sensor. The input measuring light wavelength(s) are selected to fall within the operating segment(s) over the range of values of interest for the physical parameter being measured. The output light from the sensor's optically resonant structure is spectrally modulated by the optically resonant structure as a function of the physical parameter being measured. The spectrally modulated output light is then converted into analog electrical measuring output signals by detection means. In one form, a single optical fiber carries both input light to and output light from the optically resonant structure. When more than one input measuring light wavelength is used, means may also be provided to divide the input light wavelengths into two portions and then take the ratio thereof. This provides several advantages simultaneously, such as enabling longer operating segments and microshifts to be used for greater sensitivity or detection range, and also eliminates certain errors caused by fluctuations in input light intensity or by changes in light intensity caused by optical fiber bending and optical fiber connectors.

摘要翻译： 由物理参数在频谱调制传感器的光学共振结构诱导的被测量的物理变化导致其反射率和透射率曲线的微移，以及它们的使用，作为物理参数的函数所选择的操作段（多个）的被测量。 操作段具有最大长度和小于约一共振周期的长度为从所述传感器输出不含糊的最大微移。 输入测量光波长（S）被选择为落入操作段（一个或多个）上的用于所述物理参数感兴趣的值的范围内被测量。 来自传感器的光学谐振结构的输出光被光谱由光学谐振结构调制为所述物理参数的函数被测量。 频谱调制的输出光然后由检测装置转换成模拟电测量信号输出。 在一种形式中，单根光纤携带光输入两者，并从光学谐振结构的输出光。 当使用多于一个的输入测量光的波长，装置可以因此被提供给输入光波长分成两个部分，然后采取其比率。 这提供了同时几个优点，：如实现更长的工作段和微转移到用于更大的灵敏度或检测范围，并且因此消除了由在输入光强度的波动，或通过光纤弯曲和光纤引起的光强的变化造成了一定的误差 连接器。

公开(公告)号：EP0665425A3

公开(公告)日：1995-11-02

申请号：EP95200760.7

申请日：1985-06-25

申请人： PHOTONETICS, INC.

发明人： Saaski, Elric W. ,  Hartl, James C.

IPC分类号： G01N21/17 ,  G01N21/45 ,  G01D5/26 ,  G01J3/26

CPC分类号： G01L9/0079 ,  G01D5/268 ,  G01J3/26 ,  G01K11/12 ,  G01N21/45 ,  G01N21/75 ,  G01N21/7703 ,  G01N21/7746 ,  G01N21/80 ,  G01N21/81 ,  G01N2021/0385

摘要： A spectral modulation sensor includes an optically resonant structure comprising a body having a cavity (106) containing a sensitive medium (110) which changes in volume in response to a chemical species. The cavity and the medium include first and second reflective surfaces (107,112) which are relatively displaced with changes in volume of the chemical species. The structure spectrally modulates an input measuring light to produce output light, which is spectrally modulated as a function of the sensed chemical species.

摘要翻译： 一种光谱调制传感器包括光学谐振结构，该光学谐振结构包括具有腔体（106）的主体，该腔体含有响应于化学物质而在体积上变化的敏感介质（110）。 空腔和介质包括第一和第二反射表面（107,112），它们随着化学物质的体积变化而相对移位。 该结构对输入测量光进行光谱调制以产生输出光，该输出光作为所感测化学物种的函数进行光谱调制。

公开(公告)号：EP0665425A2

公开(公告)日：1995-08-02

申请号：EP95200760.7

申请日：1985-06-25

申请人： PHOTONETICS, INC.

发明人： Saaski, Elric W. ,  Hartl, James C.

IPC分类号： G01N21/17 ,  G01N21/45 ,  G01D5/26 ,  G01J3/26

CPC分类号： G01L9/0079 ,  G01D5/268 ,  G01J3/26 ,  G01K11/12 ,  G01N21/45 ,  G01N21/75 ,  G01N21/7703 ,  G01N21/7746 ,  G01N21/80 ,  G01N21/81 ,  G01N2021/0385

摘要： A spectral modulation sensor includes an optically resonant structure comprising a body having a cavity (106) containing a sensitive medium (110) which changes in volume in response to a chemical species. The cavity and the medium include first and second reflective surfaces (107,112) which are relatively displaced with changes in volume of the chemical species. The structure spectrally modulates an input measuring light to produce output light, which is spectrally modulated as a function of the sensed chemical species.

摘要翻译： 光谱调制传感器包括光学谐振结构，其包括具有空腔（106）的主体，该空腔包含响应于化学物质而在体积上变化的敏感介质（110）。 空腔和介质包括第一和第二反射表面（107,112），其与化学物质的体积变化相对地移位。 该结构对输入测量光进行光谱调制以产生输出光，其作为感测化学物质的函数进行光谱调制。