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    Ultrasensitive spectrophotometer
    71.
    发明申请
    Ultrasensitive spectrophotometer 有权
    超声分光光度计

    公开(公告)号：US20060152726A1

    公开(公告)日：2006-07-13

    申请号：US11035034

    申请日：2005-01-13

    Applicant: David Larsen ,  Zhi Xu

    Inventor： David Larsen ,  Zhi Xu

    IPC: G01J3/51

    CPC classification number: G01N21/31 ,  G01J3/02 ,  G01J3/0224 ,  G01J3/0262 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/42 ,  G01J2003/425 ,  G01N21/274 ,  G01N2021/3137 ,  G01N2201/0227 ,  G01N2201/0642 ,  G01N2201/127

    Abstract: The invention concerns measurements in which light interacts with matter giving rise to changes in light intensity, and preferred embodiment spectrophotometer devices of the invention provide for ultrasensitive measurements through a reflection interaction with matter. The level of light source noise in these measurements can be reduced in accordance with the invention. Preferred embodiments of the invention use sealed housings lacking an internal light source, and reflection based sample and reference cells. In some embodiments a substantially solid thermally conductive housing is used. Other features of preferred embodiments include particular reflection based sample and reference cells. A total internal reflection embodiment includes, for example, a prism including an interaction surface, a detector, a lens that focuses a beam output from the prism onto the detector, and a closed interaction volume having an inlet and an outlet for delivering gas or liquid to the interaction surface. In a specular reflection embodiment, a reflective surface is used instead of a prism. In a diffuse reflection embodiment a matte surface is used instead of a prism and the matte surface produces scattering. Aspects of the invention include identification of noise-contributing components in spectrophotometry and the select set of preferred features in a given embodiment, and noise levels very near the shot noise limit may be realized with application of preferred embodiment devices.

    Abstract translation: 本发明涉及测量光，其中光与引起光强变化的物质相互作用，并且本发明的优选实施方式的分光光度计装置通过与物质的反射相互作用来提供超灵敏测量。 根据本发明，可以减少这些测量中的光源噪声的水平。 本发明的优选实施例使用缺少内部光源的密封壳体，以及基于反射的样品和参考单元。 在一些实施例中，使用基本上固体的导热壳体。 优选实施方案的其它特征包括特定的基于反射的样品和参考细胞。 全内反射实施例包括例如包括相互作用表面的棱镜，检测器，将从棱镜输出的光束聚焦到检测器上的透镜以及具有用于输送气体或液体的入口和出口的封闭相互作用体积 到相互作用的表面。 在镜面反射实施例中，使用反射表面代替棱镜。 在漫反射实施例中，使用无光泽表面代替棱镜，并且无光泽表面产生散射。 本发明的方面包括在给定实施例中识别分光光度法中的噪声贡献成分以及在一特定实施例中选择的一组优选特征，并且通过应用优选实施例装置可以实现非常接近散粒噪声极限的噪声水平。

    Portable spectrophotometer
    73.
    发明授权
    Portable spectrophotometer 失效
    便携式分光光度计

    公开(公告)号：US4968143A

    公开(公告)日：1990-11-06

    申请号：US331133

    申请日：1989-03-31

    Applicant: Allen Weston

    Inventor： Allen Weston

    IPC: G01J3/02 ,  G01J3/42 ,  G01J3/50 ,  G01N21/47

    CPC classification number: G01N21/474 ,  G01J3/02 ,  G01J3/0251 ,  G01J3/0272 ,  G01J3/0283 ,  G01J3/0291 ,  G01J3/50 ,  G01J3/502 ,  G01J2003/425 ,  G01N2201/0655

    Abstract: A portable spectrophotometer is disclosed which is provided with a holding case accommodating opto-mechanical color-reading devices and an electronic control device provided with a microprocessor having data and program memories. The spectrophotometer further includes a power source which enables its self-sustained field use.

    Abstract translation: 公开了一种便携式分光光度计，其具有容纳光机械彩色读取装置的保持盒和设置有具有数据和程序存储器的微处理器的电子控制装置。 分光光度计还包括使其能够自我维持现场使用的电源。

    Spectroscopic evaluation of edible oil using profiles
    78.
    发明授权
    Spectroscopic evaluation of edible oil using profiles 有权

    公开(公告)号：US12123860B2

    公开(公告)日：2024-10-22

    申请号：US18153665

    申请日：2023-01-12

    Applicant: CARGILL, INCORPORATED

    Inventor： Jinping Dong ,  Steven Hansen ,  Jacob Schaller ,  Sean Smith

    IPC: G01N33/03 ,  G01J3/42 ,  G01N21/3577 ,  G01N21/359

    CPC classification number: G01N33/03 ,  G01J3/42 ,  G01N21/3577 ,  G01N21/359 ,  G01J2003/425

    Abstract: A characteristic of edible oil may be evaluated using a spectrometer. For example, optical reflectance data may be obtained from edible oil in situ in a frying apparatus housing the edible oil, the reflectance data corresponding to a specified range of infra-red wavelengths. A model profile corresponding to the characteristic being assessed may be obtained, such as from a repository housing a secured library of such profiles. The model profile may define a regression vector for use in transforming the reflectance data to generate a value corresponding to the characteristic being assessed. A criterion may be applied to the value to establish a simplified representation of the characteristic for presentation to a user for assessment of oil quality.

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