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    Birefringent optical temperature sensor and method
    1.
    发明申请
    Birefringent optical temperature sensor and method 有权
    双折射光学温度传感器及方法

    公开(公告)号：US20070133004A1

    公开(公告)日：2007-06-14

    申请号：US11333203

    申请日：2006-01-18

    Applicant: Gaetan Duplain ,  Richard Van Neste

    Inventor： Gaetan Duplain ,  Richard Van Neste

    IPC: G01B9/02

    CPC classification number: G01J5/58 ,  G01J2005/583 ,  G01J2005/586 ,  G01K11/32 ,  G01K11/3213

    Abstract: The invention concerns a tandem interferometer for temperature sensing. The low coherence interferometry (LCI) system comprises a polarization-based sensing interferometer comprising a birefringent crystal having a sensor temperature sensitivity and a birefringence dispersion, and a readout interferometer being either a Fizeau interferometer using an optical wedge or a polarization interferometer using a birefringent wedge. In one embodiment of the invention, the birefringent crystal has dispersion properties similar to that of the birefringent wedge or that of the optical wedge of the readout interferometer. The present invention also provides a signal processing method for correcting the dispersion effect and for noise filtering in LCI-based optical sensors of the tandem interferometer arrangement.

    Abstract translation: 本发明涉及用于温度感测的串联干涉仪。 低相干干涉测量（LCI）系统包括基于偏振的感测干涉仪，其包括具有传感器温度灵敏度和双折射色散的双折射晶体，以及使用光楔的Fizeau干涉仪或使用双折射楔的偏振干涉仪的读出干涉仪 。 在本发明的一个实施例中，双折射晶体具有与双折射楔形或者读出干涉仪的光楔的分散特性相似的分散特性。 本发明还提供一种用于校正串联干涉仪装置的基于LCI的光学传感器中的色散效应和噪声滤波的信号处理方法。

    Method and apparatus for the estimation of the temperature of a blackbody radiator
    2.
    发明申请
    Method and apparatus for the estimation of the temperature of a blackbody radiator 失效
    用于估计黑体散热器的温度的方法和装置

    公开(公告)号：US20040240517A1

    公开(公告)日：2004-12-02

    申请号：US10492889

    申请日：2004-04-16

    Inventor： John Howard

    IPC: G01J005/00

    CPC classification number: G01J5/58 ,  G01J3/45 ,  G01J5/00 ,  G01J5/0834 ,  G01J2005/583 ,  G01J2005/586

    Abstract: Remote sensing of the temperature of a greybody or blackbody radiator is effected by passing its radiation (24) through a modulated infrared filter spectrometer. The infrared filter comprises, in sequence, a band pass filter (20), a first polariser (21) which polarises the radiation, an electro-optical element (22) which splits the polarised radiation into two orthogonally polarised components, and a second polariser (23). A lens (28) images the radiation leaving the second polariser onto a detector (27). The electrical signal from the detector (27) is input to a numerical analyser. The electro-optical element (22), typically comprising a birefringent crystal assembly (25) and a birefringent trim plate (26), is configured so that the net optical delay of the orthogonally polarised components passed through it is such that the recombined components are at or near a peak or trough in their interferogram. A sinusoidally varying voltage is applied to the electro-optical element to modulate the net delay of the components passed through the electro-optical element. The numerical analyser is programmed to compute the harmonic amplitude ratio (the ratio of signal amplitudes at the fundamental and second harmonic of the frequency of the modulating voltage) of the signal that it receives from the detector (27). The harmonic amplitude ratio is a function of the temperature of the radiator, which can be estimated by reference to a calibration look-up table.

    Abstract translation: 通过使其辐射（24）通过调制的红外滤光器光谱仪来实现对灰体或黑体辐射体的温度的遥感。 红外滤光器依次包括带通滤波器（20），偏振辐射的第一偏振器（21），将偏振辐射分成两个正交极化分量的电光元件（22）和第二偏振器 （23）。 透镜（28）将离开第二偏振器的辐射图像到检测器（27）上。 来自检测器（27）的电信号被输入到数字分析器。 通常包括双折射晶体组件（25）和双折射装饰板（26）的电光元件（22）被配置为使得通过它的正交极化分量的净光学延迟使得重组组分为 在它们的干涉图中的峰或谷附近。 将正弦变化的电压施加到电光元件以调节通过电光元件的部件的净延迟。 数字分析仪被编程为计算其从检测器（27）接收的信号的谐波振幅比（在调制电压的频率的基波和二次谐波处的信号幅度的比率）。 谐波振幅比是散热器的温度的函数，可以通过参考校准查找表来估计。

    Method and apparatus for the estimation of the temperature of a blackbody radiator
    3.
    发明授权
    Method and apparatus for the estimation of the temperature of a blackbody radiator 失效
    用于估计黑体散热器的温度的方法和装置

    公开(公告)号：US07001068B2

    公开(公告)日：2006-02-21

    申请号：US10492889

    申请日：2002-10-18

    Applicant: John Howard

    Inventor： John Howard

    IPC: G01K11/00 ,  G01J5/00

    CPC classification number: G01J5/58 ,  G01J3/45 ,  G01J5/00 ,  G01J5/0834 ,  G01J2005/583 ,  G01J2005/586

    Abstract: Remote sensing of the temperature of a greybody or blackbody radiator is effected by passing its radiation (24) through a modulated infrared filter spectrometer. The infrared filter comprises, in sequence, a band pass filter (20), a first polariser (21) which polarises the radiation, an electro-optical element (22) which splits the polarised radiation into two orthogonally polarised components, and a second polariser (23). A lens (28) images the radiation leaving the second polariser onto a detector (27). The electrical signal from the detector (27) is input to a numerical analyser. The electro-optical element (22), typically comprising a birefringent crystal assembly (25) and a birefringent trim plate (26), is configured so that the net optical delay of the orthogonally polarised components passed through it is such that the recombined components are at or near a peak or trough in their interferogram. A sinusoidally varying voltage is applied to the electro-optical element to modulate the net delay of the components passed through the electro-optical element. The numerical analyser is programmed to compute the harmonic amplitude ratio (the ratio of signal amplitudes at the fundamental and second harmonic of the frequency of the modulating voltage) of the signal that it receives from the detector (27). The harmonic amplitude ratio is a function of the temperature of the radiator, which can be estimated by reference to a calibration look-up table.

    Abstract translation: 通过使其辐射（24）通过调制的红外滤光器光谱仪来实现对灰体或黑体辐射体的温度的遥感。 红外滤光器依次包括带通滤波器（20），偏振辐射的第一偏振器（21），将偏振辐射分成两个正交极化分量的电光元件（22）和第二偏振器 （23）。 透镜（28）将离开第二偏振器的辐射图像到检测器（27）上。 来自检测器（27）的电信号被输入到数字分析器。 通常包括双折射晶体组件（25）和双折射装饰板（26）的电光元件（22）被配置为使得通过它的正交极化分量的净光学延迟使得重组组分为 在它们的干涉图中的峰或谷附近。 将正弦变化的电压施加到电光元件以调节通过电光元件的部件的净延迟。 数字分析仪被编程为计算其从检测器（27）接收的信号的谐波振幅比（在调制电压的频率的基波和二次谐波处的信号幅度的比率）。 谐波振幅比是散热器的温度的函数，可以通过参考校准查找表来估计。

    Pyroelectric and other infrared detection devices with thin films
    4.
    发明授权
    Pyroelectric and other infrared detection devices with thin films 失效
    具有薄膜的PYROELECTRIC和其他红外检测装置

    公开(公告)号：US5122666A

    公开(公告)日：1992-06-16

    申请号：US581829

    申请日：1990-09-12

    Applicant: Andrew A. Turnbull

    Inventor： Andrew A. Turnbull

    IPC: G01J5/10 ,  G01J5/34 ,  G01J5/58 ,  H01L37/02

    CPC classification number: H01L37/02 ,  G01J5/10 ,  G01J5/34 ,  G01J5/58 ,  G01J2005/586

    Abstract: An infrared detection device, e.g. for the 8 to 14 micrometer waveband, comprises a Langmuir-Blodgett or other very thin film (10) having pyroelectric or other temperature-dependent characteristics. At least one detector element having opposite electrical conductors (21 and 22) is formed in the film (10). The film (10) which may have a support layer (15) is mostly free of contact with a mount arrangement (25) which supports the film (10) in a very low thermally-conductive manner. In accordance with the present invention, the film (10) is very thin, but very efficient absorption of the radiation (31) is obtained in the following manner: the facing surface (26) of the mount arrangement (25) is reflective for the radiation (31); the sum of the optical thicknesses of the film (10), of any support layer (15) and (d) of a gap (28) forming the multiple layer detector-element structure along the radiation path to the reflector (26) is approximately one quarter of a selected wavelength (e.g. 9.6 micrometers) in the range to be detected; and the conductors (21 and 22) each comprise a resistive layer providing a sufficient resistance per square (Z1 and Z2, e.g. of twice the characteristic impedance of free space) as to absorb a substantial proportion of the incident radiation (31) and reflected radiation (32) in the wavelength range. Spaced supporting elements (252) below the film (10) can support the film (10) over the reflector (26) with a well-defined small gap (28) and carry an electrical connection to the second conductor(s) (22) below the film.

    Birefringent optical temperature sensor and method
    10.
    发明授权
    Birefringent optical temperature sensor and method 有权

    公开(公告)号：US07265847B2

    公开(公告)日：2007-09-04

    申请号：US11333203

    申请日：2006-01-18

    Applicant: Gaetan Duplain ,  Richard Van Neste

    Inventor： Gaetan Duplain ,  Richard Van Neste

    IPC: G01B9/02

    CPC classification number: G01J5/58 ,  G01J2005/583 ,  G01J2005/586 ,  G01K11/32 ,  G01K11/3213

    Abstract: The invention concerns a tandem interferometer for temperature sensing. The low coherence interferometry (LCI) system comprises a polarization-based sensing interferometer comprising a birefringent crystal having a sensor temperature sensitivity and a birefringence dispersion, and a readout interferometer being either a Fizeau interferometer using an optical wedge or a polarization interferometer using a birefringent wedge. In one embodiment of the invention, the birefringent crystal has dispersion properties similar to that of the birefringent wedge or that of the optical wedge of the readout interferometer. The present invention also provides a signal processing method for correcting the dispersion effect and for noise filtering in LCI-based optical sensors of the tandem interferometer arrangement.

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