公开(公告)号：US6008928A

公开(公告)日：1999-12-28

申请号：US19473

申请日：1998-02-05

申请人： Glenn W. Sachse ,  Liang-guo Wang ,  Peter J. LeBel ,  Tommy C. Steele ,  Mauro Rana

发明人： Glenn W. Sachse ,  Liang-guo Wang ,  Peter J. LeBel ,  Tommy C. Steele ,  Mauro Rana

IPC分类号： G01N21/35 ,  G02F1/03

CPC分类号： G01N21/3504

摘要： A multi-gas sensor is provided which modulates a polarized light beam over a broadband of wavelengths between two alternating orthogonal polarization components. The two orthogonal polarization components of the polarization modulated beam are directed along two distinct optical paths. At least one optical path contains one or more spectral discrimination element, with each spectral discrimination element having spectral absorption features of one or more gases of interest being measured. The two optical paths then intersect, and one orthogonal component of the intersected components is transmitted and the other orthogonal component is reflected. The combined polarization modulated beam is partitioned into one or more smaller spectral regions of interest where one or more gases of interest has an absorption band. The difference in intensity between the two orthogonal polarization components is then determined in each partitioned spectral region of interest as an indication of the spectral emission/absorption of the light beam by the gases of interest in the measurement path. The spectral emission/absorption is indicative of the concentration of the one or more gases of interest in the measurement path. More specifically, one embodiment of the present invention is a gas filter correlation radiometer which comprises a polarizer, a polarization modulator, a polarization beam splitter, a beam combiner, wavelength partitioning element, and detection element. The gases of interest are measured simultaneously and, further, can be measured independently or non-independently. Furthermore, optical or electronic element are provided to balance optical intensities between the two optical paths.

摘要翻译： 提供了一种多气体传感器，其在两个交替正交偏振分量之间的波长的宽带上调制偏振光束。 偏振调制束的两个正交偏振分量被引导沿着两个不同的光路。 至少一个光路包含一个或多个光谱鉴别元件，每个光谱鉴别元件测量一个或多个感兴趣气体的光谱吸收特征。 两个光路然后相交，并且相交的分量的一个正交分量被发送，并且另一个正交分量被反射。 组合的偏振调制束被划分成一个或多个感兴趣的较小光谱区域，其中一个或多个感兴趣的气体具有吸收带。 然后，在感兴趣的每个分区光谱区域中确定两个正交偏振分量之间的强度差，作为测量路径中感兴趣的气体对光束的光谱发射/吸收的指示。 光谱发射/吸收表示测量路径中感兴趣的一种或多种气体的浓度。 更具体地，本发明的一个实施例是一种气体滤波器相关辐射计，其包括偏振器，偏振调制器，偏振分束器，光束组合器，波长分隔元件和检测元件。 感兴趣的气体同时测量，并且还可以独立地或非独立地测量。 此外，提供光学或电子元件以平衡两个光路之间的光强度。

公开(公告)号：US07253903B2

公开(公告)日：2007-08-07

申请号：US11027930

申请日：2004-12-29

申请人： Glen W. Sachse ,  Mauro Rana

发明人： Glen W. Sachse ,  Mauro Rana

IPC分类号： G01N21/00

CPC分类号： G01N21/314 ,  G01N2021/1793

摘要： Each of two sensors, positioned to simultaneously detect electromagnetic radiation absorption along a path, is calibrated to define a unique response curve associated therewith that relates a change in voltage output for each sensor to a change in optical density. A ratio-of-responses curve is defined by a ratio of the response curve associated with the first sensor to the response curve associated with the second sensor. A ratio of sensor output changes is generated using outputs from the sensors. An operating point on the ratio-of-responses curve is established using the ratio of sensor output changes. The established operating point is indicative of an optical density. When the operating point is in the non-linear response region of at least one of the sensors, the operating point and optical density corresponding thereto can be used to establish an actual response of at least one of the sensors whereby the actual sensor output can be used in determining changes in the optical density.

摘要翻译： 被定位成同时检测沿着路径的电磁辐射吸收的两个传感器中的每一个被校准以定义与之相关联的唯一响应曲线，其将每个传感器的电压输出的变化与光密度的变化相关联。 响应曲线由与第一传感器相关联的响应曲线与与第二传感器相关联的响应曲线的比率定义。 使用传感器的输出产生传感器输出变化的比率。 使用传感器输出变化的比率建立响应曲线的操作点。 所建立的工作点表示光密度。 当工作点处于至少一个传感器的非线性响应区域中时，与其对应的工作点和光密度可用于建立至少一个传感器的实际响应，从而实际的传感器输出可以 用于确定光密度的变化。

公开(公告)号：US20060139648A1

公开(公告)日：2006-06-29

申请号：US11027930

申请日：2004-12-29

申请人： Glen Sachse ,  Mauro Rana

发明人： Glen Sachse ,  Mauro Rana

IPC分类号： G01N21/00

CPC分类号： G01N21/314 ,  G01N2021/1793

摘要： Each of two sensors, positioned to simultaneously detect electromagnetic radiation absorption along a path, is calibrated to define a unique response curve associated therewith that relates a change in voltage output for each sensor to a change in optical density. A ratio-of-responses curve is defined by a ratio of the response curve associated with the first sensor to the response curve associated with the second sensor. A ratio of sensor output changes is generated using outputs from the sensors. An operating point on the ratio-of-responses curve is established using the ratio of sensor output changes. The established operating point is indicative of an optical density. When the operating point is in the non-linear response region of at least one of the sensors, the operating point and optical density corresponding thereto can be used to establish an actual response of at least one of the sensors whereby the actual sensor output can be used in determining changes in the optical density.

摘要翻译： 被定位成同时检测沿着路径的电磁辐射吸收的两个传感器中的每一个被校准以定义与之相关联的唯一响应曲线，其将每个传感器的电压输出的变化与光密度的变化相关联。 响应曲线由与第一传感器相关联的响应曲线与与第二传感器相关联的响应曲线的比率定义。 使用传感器的输出产生传感器输出变化的比率。 使用传感器输出变化的比率建立响应曲线的操作点。 所建立的工作点表示光密度。 当工作点处于至少一个传感器的非线性响应区域中时，与其对应的工作点和光密度可用于建立至少一个传感器的实际响应，从而实际的传感器输出可以 用于确定光密度的变化。