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    IMPROVED APPARATUS AND METHOD FOR DETECTION OF ASBESTOS FIBRES TECHNOLOGY
    23.
    发明公开
    IMPROVED APPARATUS AND METHOD FOR DETECTION OF ASBESTOS FIBRES TECHNOLOGY 审中-公开
    VERBESSERTE VORRICHTUNG UND VERFAHREN ZUR ERKENNUNG EINER ASBESTFASERTECHNOLOGIE

    公开(公告)号：EP2956757A1

    公开(公告)日：2015-12-23

    申请号：EP14705390.4

    申请日：2014-02-10

    申请人： University of Hertfordshire Higher Education Corporation

    发明人： KAYE, Paul ,  HIRST, Edwin ,  STOPFORD, Christopher ,  GREENAWAY, Richard ,  STANLEY, Warren

    IPC分类号： G01N15/02 ,  G01N15/14 ,  G01N33/36

    CPC分类号： G01N15/1404 ,  G01N15/1434

    摘要： A fibre detector 210 comprises a scattering chamber, means 222 for drawing particles 220 through said chamber in a particle stream, said means 222 being adapted such that particles travel in single file with a longitudinal axis substantially aligned with the flow direction, means 212 for illuminating the particle stream within the chamber, an optical detector 236 adapted to collect a portion of light scattered by particles, data processing means adapted to process the signals from the detector, wherein the apparatus further comprises a means 224, 226 for perpendicularly applying a magnetic field across the particle stream. The detector may a radial detector array or linear arrays. A further detector 234 collects scattered light for particle sizing and to trigger the detector 236. A second light source may also be implemented with the first, and a means for providing a sheath of clean air with the particle flow may be included.

    摘要翻译： 纤维检测器210包括散射室，用于以颗粒物流将颗粒220抽吸通过所述室的装置222，所述装置222适于使得颗粒以单一文件行进，其纵轴基本上与流动方向对齐，用于照明的装置212 室内的颗粒流，适于收集由颗粒散射的光的一部分的光学检测器236，适于处理来自检测器的信号的数据处理装置，其中该装置还包括用于垂直施加磁场的装置224,226 跨过粒子流。 检测器可以是径向检测器阵列或线性阵列。 另外的检测器234收集用于颗粒尺寸的散射光并触发检测器236.第二光源也可以用第一光源实现，并且可以包括用于提供具有颗粒流的清洁空气的护套的装置。

    DETECTION OF HAZARDOUS AIRBORNE FIBRES
    29.
    发明公开
    DETECTION OF HAZARDOUS AIRBORNE FIBRES 失效
    检测危险浮动纤维的

    公开(公告)号：EP0925493A1

    公开(公告)日：1999-06-30

    申请号：EP97939015.0

    申请日：1997-09-03

    申请人： UNIVERSITY OF HERTFORDSHIRE

    发明人： KAYE, Paul, Henry ,  HIRST, Edwin

    IPC分类号： G01N15 ,  H01L31

    CPC分类号： G01N15/1459 ,  G01N2015/0049 ,  G01N2015/1488 ,  G01N2021/4716 ,  H01L31/02024 ,  H01L31/03529 ,  Y02E10/50

    摘要： A fibre detector assembly comprising: (i) a scattering chamber body; (ii) means for drawing airborne particles through said body chamber, said means being adapted such the particles tend to travel in single file with the longitudinal axis of particles with elongate shape substantially aligned with the direction of the air flow; (iii) means for illuminating the particle stream within the chamber body; (iv) an optical detector adapted to intercept and collect a portion of the light scattered by particles passing through the illuminating beam; (v) data processing means adapted to capture and process the signals from the optical detector; characterised in that the optical detector comprises a photodiode array consisting of a central opaque area surrounded by two or more annular rings of detector elements.

    Optical microscopes
    30.
    发明公开
    Optical microscopes 失效
    Optische Mikroskope。

    公开(公告)号：EP0486732A1

    公开(公告)日：1992-05-27

    申请号：EP90312592.0

    申请日：1990-11-20

    申请人： UNIVERSITY OF HERTFORDSHIRE

    发明人： Ulanowski, Zbigniew Jozef

    IPC分类号： G02B21/06 ,  G02B21/00

    CPC分类号： G02B21/002 ,  G02B21/082

    摘要： A microscope is provided with a supplementary means for producing a light spot in the object plane of the microscope objective lens. The supplementary means comprises a light source from which a collimated light beam is derived, a focusing lens receiving the collimated beam and a coupling lens disposed between said first lens and the objective lens. The supplementary means has the following features:
    (i) the focal point of the focusing lens is in the plane of the image of a specimen in said object plane as obtained through the objective lens and the coupling lens,
       (ii) the light beam fills the clear aperture of the objective lens without substantial light loss and (iii) the focusing lens is movable in a plane perpendicular to its axis to the light spot in the object plane of the objective lens, the parameters of the system are such that the axial ray of light from the light source always passes through the second principal point (i.e. that on the object side) of the objective lens. In one embodiment the focusing lens and the light source are movable together perpendicularly to said axis. In a second embodiment the focusing lens is movable perpendicularly to said axis relatively to the collimated light beam.

    摘要翻译： 在显微镜上设置有用于在显微镜物镜的物平面中产生光斑的辅助装置。 补充装置包括衍生准直光束的光源，接收准直光束的聚焦透镜和设置在所述第一透镜和物镜之间的耦合透镜。 辅助装置具有以下特征：（i）聚焦透镜的焦点在通过物镜和耦合透镜获得的所述物平面中的样本的平面中，（ii）光束填充 物镜的清晰光圈没有实质的光损失，和（iii）聚焦透镜可以在垂直于其轴线的平面中在物镜的物平面中的光点移动，系统的参数使得轴向 来自光源的光线始终通过物镜的第二主要点（即物体侧）。 在一个实施例中，聚焦透镜和光源可垂直于所述轴线一起移动。 在第二实施例中，聚焦透镜可相对于准直光束垂直于所述轴移动。