79.
    发明专利
    未知

    公开(公告)号:AT494545T

    公开(公告)日:2011-01-15

    申请号:AT08718759

    申请日:2008-03-14

    Inventor: MATOUSEK PAVEL

    Abstract: 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.

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