A BIREFRINGENT-BIASED SENSOR
    1.
    发明申请
    A BIREFRINGENT-BIASED SENSOR 审中-公开
    BIREFRINGENT-BIASED传感器

    公开(公告)号:WO1997014942A1

    公开(公告)日:1997-04-24

    申请号:PCT/US1996016749

    申请日:1996-10-18

    CPC classification number: G01L1/241

    Abstract: A birefringent bias is provided to an optical sensor by the addition of one or more single birefringent elements where the total birefringence-length product remains within the accepted tolerances of current devices. The bias provided by two or more elements is such that where each element has a birefringence, a dB/dT and a coefficient of thermal expansion term, the elements are arranged in tamdem so that the combined birefringence terms equal the required birefringence bias and the dB/dT and coefficient of thermal expansion terms effectively cancel.

    Abstract translation: 通过添加一个或多个单双折射元件向光学传感器提供双折射偏置,其中总双折射长度乘积保持在当前器件的公认误差范围内。 由两个或更多个元件提供的偏压使得当每个元件具有双折射,dB / dT和热膨胀项的系数时,元件被布置在tamdem中,使得组合双折射项等于所需的双折射偏差和dB / dT和热膨胀系数有效地消除。

    BIREFRINGENT OPTICAL TEMPERATURE SENSOR WITH ADJUSTABLE TEMPERATURE SENSITIVITY
    2.
    发明申请
    BIREFRINGENT OPTICAL TEMPERATURE SENSOR WITH ADJUSTABLE TEMPERATURE SENSITIVITY 审中-公开
    具有可调节温度灵敏度的双重光学温度传感器

    公开(公告)号:WO1996031763A1

    公开(公告)日:1996-10-10

    申请号:PCT/US1996004555

    申请日:1996-04-03

    CPC classification number: G01K11/3206 G01K11/18

    Abstract: An optical temperature sensor for use in a temperature detector system having at least two birefringent crystal elements arranged in tandem. A collimated broad band light source is transmitted via a fiber optic cable, a polarizer to a first birefringent crystal element. The first crystal element decomposes the light wave into first and second orthogonally polarized waves and transmits the wave components to a second birefringent crystal element. The linearly polarized waves propagate through the birefringent crystals, and the environmental temperature introduces a temperature dependent phase shift between the two polarized waves. The light waves exit the second crystal to a second polarizer producing a modulated light spectrum. A focusing element collects the light and transmits it down another fiber optic cable. The cable transmits the light to an opto-electronic interface where the fringe pattern is extracted and a computer compatible signal is generated for a CPU. The CPU performs a Fourier transform on the fringe pattern, where the phase term for a selected frequency is the measure of the environmental temperature experienced by the birefringent crystals.

    Abstract translation: 一种用于温度检测器系统的光学温度传感器,其具有串联布置的至少两个双折射晶体元件。 准直的宽带光源通过光纤电缆,偏振器传输到第一双折射晶体元件。 第一晶体元件将光波分解为第一和第二正交极化波,并将波分量透射到第二双折射晶体元件。 线性偏振波通过双折射晶体传播,环境温度引入两个极化波之间的温度相关相移。 光波将第二晶体离开产生调制光谱的第二偏振片。 聚焦元件收集光并将其传输到另一根光纤电缆上。 电缆将光线传输到提取条纹图案的光电接口,并为CPU生成计算机兼容信号。 CPU对条纹图案进行傅立叶变换,其中所选频率的相位项是双折射晶体经历的环境温度的量度。

    OPTICAL WAVEGUIDES OF ALUMINUM GARNET
    3.
    发明公开
    OPTICAL WAVEGUIDES OF ALUMINUM GARNET 失效
    光纤铝石榴石。

    公开(公告)号:EP0586542A1

    公开(公告)日:1994-03-16

    申请号:EP92912534.0

    申请日:1992-05-18

    IPC: G02B6

    CPC classification number: G02B6/131 G02B6/02 G02B6/122

    Abstract: Guides d'ondes optiques utilisables dans des environnements à haute température, formés d'un corps guide d'ondes composé d'un premier grenat d'aluminium cristallin, qui est recouvert d'une couche épitaxiale d'un second grenat d'aluminium cristallin, lequel a un indice de réfraction plus bas que le premier grenat d'aluminium cristallin. Lorsque le manque de correspondance de réseaux cristallins entre le grenat servant de substrat et la couche de revêtement est suffisamment important, un effort est induit qui cause une compression résultant en une biréfringence dans la couche guide d'ondes. De tels guides d'ondes biréfringents maintiennent la polarisation de la lumière qui se propage à travers eux.

    A BIREFRINGENT TEMPERATURE SENSOR
    4.
    发明公开
    A BIREFRINGENT TEMPERATURE SENSOR 失效
    双折射探头。

    公开(公告)号:EP0614520A1

    公开(公告)日:1994-09-14

    申请号:EP92924360.0

    申请日:1992-11-06

    CPC classification number: G01K11/12

    Abstract: Détecteur s'utilisant dans un système de détection optique de température possédant un élément biréfringent constitué par une plaque d'oxyde métallique monocristal. Un spectre lumineux à bande large est transmis à travers un premier élément de polarisation linéaire, de façon à créer une onde à polarisation linéaire. Ladite onde, lorsqu'elle traverse la plaque d'oxyde métallique monocristal, se décompose entre une première et une deuxième onde à polarisation orthogonale. La propagation de l'onde à polarisation linéaire à travers la plaque d'oxyde métallique monocristal biréfringente introduit un décalage de phase dépendant de la température entre les deux ondes. Ensuite, un deuxième polarisateur linéaire combine la première et la deuxième onde à polarisation orthogonale, de façon à créer un spectre lumineux modulé possédant une configuration limite représentant une fonction de la température du courant s'exerçant sur ledit élément biréfringent. Un câble de fibre optique relié au deuxième élément de polarisation linéaire transporte le spectre lumineux modulé vers une interface opto-électronique où s'effectue l'extraction de la configuration limite, ainsi que la création d'un signal compatible avec un ordinateur, ce qui permet à un ordinateur central d'indiquer avec précision les conditions de température de courant environnantes atteignant 1000 °C, auxquelles est soumise la plaque monocristal de l'élément biréfringent.

    BIREFRINGENT OPTICAL TEMPERATURE SENSOR WITH ADJUSTABLE TEMPERATURE SENSITIVITY
    5.
    发明公开
    BIREFRINGENT OPTICAL TEMPERATURE SENSOR WITH ADJUSTABLE TEMPERATURE SENSITIVITY 失效
    具有可调灵敏度的双折射光学温度传感器

    公开(公告)号:EP0819242A1

    公开(公告)日:1998-01-21

    申请号:EP96911553.0

    申请日:1996-04-03

    CPC classification number: G01K11/3206 G01K11/18

    Abstract: An optical temperature sensor for use in a temperature detector system having at least two birefringent crystal elements arranged in tandem. A collimated broad band light source is transmitted via a fiber optic cable, a polarizer to a first birefringent crystal element. The first crystal element decomposes the light wave into first and second orthogonally polarized waves and transmits the wave components to a second birefringent crystal element. The linearly polarized waves propagate through the birefringent crystals, and the environmental temperature introduces a temperature dependent phase shift between the two polarized waves. The light waves exit the second crystal to a second polarizer producing a modulated light spectrum. A focusing element collects the light and transmits it down another fiber optic cable. The cable transmits the light to an opto-electronic interface where the fringe pattern is extracted and a computer compatible signal is generated for a CPU. The CPU performs a Fourier transform on the fringe pattern, where the phase term for a selected frequency is the measure of the environmental temperature experienced by the birefringent crystals.

    A BIREFRINGENT TEMPERATURE SENSOR
    6.
    发明授权
    A BIREFRINGENT TEMPERATURE SENSOR 失效
    双折射PROBE

    公开(公告)号:EP0614520B1

    公开(公告)日:1997-01-29

    申请号:EP92924360.8

    申请日:1992-11-06

    CPC classification number: G01K11/12

    Abstract: A sensor for use in an optical temperature detector system having a birefringent element made of a single crystal metal oxide plate. A broad band light spectrum is transmitted through a first linear polarizing element to create a linearly polarized wave. The linearly polarized wave on passing through the single crystal metal oxide plate decomposes into first and second orthogonally polarized waves. Propagation of the linearly polarized wave through the birefringent single crystal metal oxide plate introduces a temprature dependent phase shift between the two waves. Thereafter, a second linear polarizer combines the first and second orthogonally polarized waves to create a modulated light spectrum having a fringe pattern, the fringe pattern being a function of the current temperature experienced by said birefringent element. A fiber optic cable connected to the second linear polarizing element carries the modulated light spectrum to an opto-electronic interface where the fringe pattern is extracted and a computer compatible signal is generated for a CPU to accurately indicate current environmental temperature conditions up to 1000 °C experienced by the single crystal plate crystal in the birefringent element.

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