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    • 7. 发明授权
    • Illumination of diffusely scattering media
    • 散射介质的照明
    • US08692990B2
    • 2014-04-08
    • US12531265
    • 2008-03-14
    • Pavel Matousek
    • Pavel Matousek
    • G01N21/47G01N21/65G01J3/44
    • G01N21/47G01J3/10G01J3/44G01N21/49G01N21/65G01N21/658G01N2021/4735
    • The invention provides a technique for increasing the illumination intensity of probe light in a diffusely scattering sample without increasing the power of the probe beam. Generally, an optical filter is used which permits a collimated probe beam of light to pass through to the sample, but which reflects back towards the sample much of the backscattered scattered probe light emerging at a wider range of angles. In particular embodiments a collimated laser beam is delivered to the sample through a multi-layer dielectric filter covering a portion of the sample. The filter is transmissive to the laser light at normal incidence, but reflective at shallower angles of incidence characteristic of the backscattered light.
    • 本发明提供了一种用于在不增加探测光束的功率的情况下增加漫散射样品中的探测光的照明强度的技术。 通常,使用光学滤光器,其允许准直的探测光束通过样品,但是反射回样品大部分在更宽范围的角度上出现的背散射的散射探测光。 在特定实施例中,准直激光束通过覆盖样品的一部分的多层介质滤波器传送到样品。 滤光器在正常入射时对激光透射,但反射在较浅的背散射光入射角。