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公开(公告)号：US3837744A
公开(公告)日：1974-09-24
申请号：US85880269
申请日：1969-09-17
Applicant: ENVIRONMENTAL DATA CORP
Inventor： EGAN D , HOLSTROM G , LORD H
CPC classification number: G01J3/42 , G01J3/0229 , G01J3/08 , G01J3/457 , G01J2003/2866
Abstract: A spectrometer according to this disclosure includes optical means for receiving radiation from a region which may or may not contain particular materials to be monitored. Spectrum display means is provided for displaying the spectrum of received radiation. A first output means having first apertures is disposed to pass an image of absorption lines associated with the particular material being monitored, and second output means having second apertures is disposed to pass an image of continuum associated with the particular material.
Abstract translation: 根据本公开的光谱仪包括用于接收来自可以包含或可以不包含要监视的特定材料的区域的辐射的光学装置。 提供频谱显示装置用于显示所接收的辐射的频谱。 具有第一孔的第一输出装置设置成通过与被监测的特定材料相关联的吸收线的图像，并且设置具有第二孔的第二输出装置以通过与特定材料相关联的连续体的图像。
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公开(公告)号：US3836237A
公开(公告)日：1974-09-17
申请号：US35416073
申请日：1973-04-25
Applicant: ENVIRONMENTAL DATA CORP
CPC classification number: G01N21/85
Abstract: The present disclosure relates to spectrometry. A method is disclosed for detecting nitric oxide (NO) without first converting it to nitrogen dioxide (NO2) by determining the intensity of a spectral signature in the range between about 2259 and 2269 Angstroms. Apparatus is provided which, in one form, utilizes an output shutter arrangement having a plurality of reciprocating vanes operated at mutually exclusive frequencies for passing regions of absorption radiation and continuum radiation. Circuit means is provided for distinguishing the signals derived at the various frequencies to determine the relative amount of particular material in a sample. In another form of the invention, an output chopper is provided having at least three slit apertures, the center aperture being adapted to pass only radiation at an absorption wavelength and the two outer apertures being adapted to pass radiation in the continuum. A vane is adapted to reciprocate between a first position wherein the chopper passes only radiation through the center aperture and a second position wherein the chopper passes only radiation through the two outer apertures. The area of each of the two outer apertures is preferably one-half the area of the center aperture. A detector viewing radiation passed by the chopper will average the radiation received from the two outer apertures. In yet another aspect of the invention, a window assembly is provided so that the spectrometer may be used as a stack monitor, the window assembly having a slidable window which may be removed for cleaning purposes.
Abstract translation: 本公开涉及光谱测定。 公开了一种用于检测一氧化氮（NO）的方法，而不首先通过在约2259和2269埃之间的范围内确定光谱特征的强度来将其转化为二氧化氮（NO 2）。 提供了一种装置，其在一种形式中利用具有以相互排斥的频率操作的多个往复式叶片的输出闸门装置，用于通过吸收辐射区域和连续辐射。 提供电路装置用于区分以各种频率导出的信号，以确定样品中特定材料的相对量。 在本发明的另一种形式中，提供输出斩波器具有至少三个狭缝孔，该中心孔适于仅以吸收波长传播辐射，并且两个外部孔适于通过连续体中的辐射。 叶片适于在第一位置和第二位置之间往复运动，在第一位置，斩波器仅通过中心孔径穿过辐射，而第二位置，其中斩光器仅通过两个外部孔径穿过辐射。 两个外孔中的每一个的面积优选为中心孔的面积的一半。 观察由斩光器通过的辐射的检测器将使从两个外部孔径接收的辐射平均。 在本发明的另一方面，提供一种窗组件，使得该光谱仪可用作堆叠监视器，该窗组件具有可滑动的窗口，该窗可以被清除以用于清洁目的。
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公开(公告)号：US3819945A
公开(公告)日：1974-06-25
申请号：US37299373
申请日：1973-06-25
Applicant: ENVIRONMENTAL DATA CORP
CPC classification number: G01N21/33 , G01J3/457 , G01J2003/2866
Abstract: The present disclosure relates to spectrometry. A method is disclosed for detecting nitric oxide (NO) without first converting it to nitrogen dioxide (NO2) by determining the intensity of a spectral signature in the range between 2,259 and 2,269 Angstroms. Apparatus is provided which, in one form, utilizes an output shutter arrangement having a plurality of reciprocating vanes operated at mutually exclusive frequencies for passing regions of absorption radiation and continuum radiation. Circuit means is provided for distinguishing the signals derived at the various frequencies to determine the relative amount of particular material in a sample. In another form of the invention, an output chopper is provided having at least three slit apertures, the center aperture being adapted to pass only radiation at an absorptive wavelength and the two outer apertures being adapted to pass radiation in the continuum. A vane is adapted to reciprocate between a first position wherein the chopper passes only radiation through the center aperture and a second position wherein the chopper passes only radiation through the two outer apertures. The area of each of the two outer apertures is preferably one-half the area of the center aperture. A detector viewing radiation passed by the chopper will average the radiation received from the two outer apertures. In yet another aspect of the invention, a window assembly is provided so that the spectrometer may be used as a a stack monitor, the window assembly having a slidable window which may be removed for cleaning purposes.
