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    Illuminating device for the optical, particularly image-analytical evaluation of microbiological objects
    3.
    发明授权
    Illuminating device for the optical, particularly image-analytical evaluation of microbiological objects 失效
    用于光学的照明装置，特别是微生物对象的图像分析评估

    公开(公告)号：US4665036A

    公开(公告)日：1987-05-12

    申请号：US734921

    申请日：1985-05-16

    申请人： Hubert Dedden ,  Dietrich Forster ,  Horst Rost ,  Alfred Zembrod

    发明人： Hubert Dedden ,  Dietrich Forster ,  Horst Rost ,  Alfred Zembrod

    IPC分类号： C12M1/34 ,  G01N21/47 ,  G02B27/00 ,  C12M1/20

    CPC分类号： G01N21/47 ,  C12M41/36 ,  G01N2201/06126 ,  Y10S435/808

    摘要： An illuminating device with a diffused, radiating, surface light source (3) and an aperture system positioned between the light source and the object is provided. The aperture system is formed by two optically complementary aperture screens (4, 5) which are disposed in series, and are spaced apart. The first aperture screen (4) thereby consists of a large number of transparent circular discs (8), positioned at intervals on an opaque base, and a second aperture screen (5) consists of a large number of opaque circular discs (9), positioned at intervals on a transparent base. The diameter of the opaque circular discs (9) is larger than that of the transparent circular discs (8), so that the circular discs of the two aperture screens (4, 5) overlap in the projection. The microbiological structures used generally have a large number of almost circular areas which are positioned in a regular surface pattern on a transparent base or round one or some relatively large circular transparent areas on a light-dispersing base. With the illuminating device according to the principle of the complementary aperture screens, the contrast of such microbiological structures in relation to the base could be substantially improved.

    摘要翻译： 提供具有漫射，辐射面光源（3）和位于光源和物体之间的光圈系统的照明装置。 孔径系统由两个光学互补的孔眼筛网（4,5）形成，它们被串联布置并且间隔开。 因此，第一孔径筛（4）由大量透明圆盘（8）组成，其间隔地设置在不透明基底上，第二孔径筛（5）由大量不透明圆盘（9）组成， 定位在透明基座上。 不透明圆盘（9）的直径大于透明圆盘（8）的直径，使得两个孔径筛（4,5）的圆盘在突起中重叠。 所使用的微生物结构通常具有大量几乎圆形的区域，它们以透明基底或圆形的一个或一些相对大的圆形透明区域位于光分散基底上。 利用根据互补孔径筛网原理的照明装置，这种微生物结构相对于基底的对比可以显着改善。

    Reflectance photometer
    4.
    发明授权
    Reflectance photometer 失效
    反射光度计

    公开(公告)号：US4890926A

    公开(公告)日：1990-01-02

    申请号：US135252

    申请日：1987-12-21

    申请人： Andrew Dosmann ,  Willis Howard ,  Alfred Zembrod

    发明人： Andrew Dosmann ,  Willis Howard ,  Alfred Zembrod

    IPC分类号： G01N33/49 ,  G01N21/21 ,  G01N21/47

    CPC分类号： G01N21/474 ,  G01N2021/478 ,  G01N21/21

    摘要： A reflectance photometer for quantitatively measuring diffuse light includes a light source located above a sample. The reflectance photometer also includes a first detector mounted at a preselected scattering angle relative to an axis extending perpendicularly from the sample through the light source. A first linear polarizer is mounted between the sample and the light source. The direction of polarization of the first linear polarizer is vertical to a scattering plane defined by the direction of incoming light from the light source and the direction of reflected light detected by the first detector. A second linear polarizer is mounted between the sample and the first detector. The direction of the second polarizer is parallel to the scattering plane. The reflectance photometer can include a second detector mounted at a second, scattering angle. A third linear polarizer is mounted between the sample and the second detector. The direction of polarization of the third linear polarizer can be perpendicular or parallel to the scattering plane. Generally, the three polarizers are close such that the contributors of scattered light as related to surface noise will be minimized for the first detector and maximized for the second detector, respectively. The optimum settings of the polarizer will depend on the settings of the polarizers, the scattering geometry, the sample orientation and the bulk and surface scattering properties of the sample material.