公开(公告)号：US5477326A

公开(公告)日：1995-12-19

申请号：US269363

申请日：1994-06-30

Applicant: Andrew J. Dosmann

Inventor： Andrew J. Dosmann

IPC: G01J3/28 ,  G01J1/42 ,  G01J3/50 ,  G01N21/25 ,  G01N21/27

CPC classification number: G01J1/4228 ,  G01N21/255

Abstract: A photometer readhead is used to measure concentrations within a test sample of preselected color-developed analytes having different characteristic absorption bands. The photometer readhead comprises an artificial light source for illuminating the test sample, a plurality of light-emitting diodes for detecting light transmitted through or reflected from the test sample, and a housing assembly for enclosing and supporting the plurality of light-emitting diodes. The plurality of light-emitting diodes have spectral responses encompassing respective ones of the different characteristic absorption bands of the preselected color-developed analytes. The plurality of light-emitting diodes preferably include a first light-emitting diode having a spectral response in red portion of the visible light spectrum; a second light-emitting diode having a spectral response in the blue portion of the visible light spectrum, a third light-emitting diode having a spectral response in the green portion of the visible light spectrum, and a fourth light-emitting diode having a spectral response in the infrared light spectrum.

Abstract translation: 光度计读数头用于测量具有不同特征吸收带的预先选定的显色分析物的测试样品中的浓度。 光度计读取头包括用于照亮测试样品的人造光源，用于检测透射通过测试样品或从测试样品反射的光的多个发光二极管，以及用于封闭和支撑多个发光二极管的壳体组件。 多个发光二极管具有包含预先选择的显色分析物的不同特征吸收带中各自的光谱响应。 多个发光二极管优选包括在可见光谱的红色部分具有光谱响应的第一发光二极管; 在可见光谱的蓝色部分具有光谱响应的第二发光二极管，在可见光光谱的绿色部分具有光谱响应的第三发光二极管和具有光谱的第四发光二极管 红外光谱响应。

公开(公告)号：US5155628A

公开(公告)日：1992-10-13

申请号：US382296

申请日：1989-07-20

Applicant: Andrew J. Dosmann

Inventor： Andrew J. Dosmann

IPC: G01N21/25 ,  G02B27/12

CPC classification number: G02B27/108 ,  G01N21/255 ,  G02B27/1006 ,  G02B27/143 ,  G02B27/144 ,  G01N2021/1742 ,  G01N2201/0813

Abstract: An optical transmission spectrometer for transmission measurements of absorbing and scattering samples includes light sources mounted parallel to each other in a holder. The beams of light emanating from the light sources are directed through a beam-combiner. The beam-combiner includes a first refractive surface at an angle of incidence of 45.degree.. The first refractive surface refracts light toward a common axis. The beam-combiner includes a second refractive surface parallel to the first refractive surface for refracting the beam of light along a common axis parallel to the original direction of the beam of light. The beam-combiner can include additional refractive surfaces for other beams of light to combine the beams of light into a primary beam. The spectrometer includes a collimating tube extending along the common axis for baffling stray light and directing the primary beam through a sample. A second collimating tube is provided on the side of the sample opposite the first collimating tube for baffling stray light passing through the sample. The second collimating tube directs the primary beam to a detector package mounted in a holder, where the detector viewing area of the sample is limited to that of the primary beam. As an alternative, an optic which is capable of directing multiple light beams onto a common intersection point may be used in place of the previously mentioned beam-combiner. Unlike the beam-combiner which closely aligns multiple parallel light beams and transmits them as substantially a single beam along the common axis, the alternate optical directs multiple light beams at an angle onto a common intersection point. The optic is fabricated from translucent material with first and second refractive surfaces for receiving light beams from a source and refracting the light beams toward the common intersection point.

Abstract translation: 用于吸收和散射样品的透射测量的光学透射光谱仪包括在保持器中彼此平行地安装的光源。 从光源发出的光束被引导通过光束组合器。 光束组合器包括45°入射角的第一折射表面。 第一折射表面朝向公共轴线折射光。 光束组合器包括平行于第一折射表面的第二折射表面，用于沿着平行于光束的原始方向的公共轴折射光束。 光束组合器可以包括用于其他光束的附加折射表面，以将光束组合成主光束。 光谱仪包括沿公共轴延伸的准直管，用于挡板杂散光并将主光束引导通过样品。 第二准直管设置在与第一准直管相对的样品的侧面上，用于挡住通过样品的杂散光。 第二准直管将主光束引导到安装在保持器中的检测器封装，其中样品的检测器观察面积被限制为主光束的检测器观看面积。 作为替代，可以使用能够将多个光束引导到公共交叉点上的光学器件来代替先前提到的光束组合器。 与将多个平行光束紧密对准并将其作为基本上沿着公共轴线的单个光束传输的光束组合器不同，备选光学器件将多个光束以一定角度引导到公共交叉点上。 光学元件由具有第一和第二折射表面的半透明材料制成，用于接收来自源的光束并将光束折射到公共交叉点。