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    • 3. 发明申请
    • WIRE-GRID SENSOR WITH CONTINUOUSLY CONTROLLABLE HEIGHT OF DETECTION VOLUME
    • 具有连续可控高度检测体积的电缆传感器
    • WO2010032157A1
    • 2010-03-25
    • PCT/IB2009/053915
    • 2009-09-08
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.KLUNDER, Derk, J. W.
    • KLUNDER, Derk, J. W.
    • G01N21/64
    • G01N21/648
    • The invention relates to a wire-grid biosensor assembly for detecting e.g. particles, beads, or molecules,where the height of the detection volume in the wire-grid can be adjusted by illuminating the wire-grid at angles above the critical angle and controlling the mixture of TE and TM polarized light. The wire-grid is formed on a substrate and has slits with a short axis being smaller than the diffraction limit of the applied radiation and a long axis being larger than the diffraction limit. The wire-grid is irradiated with excitation radiation through the substrate at an angle of incidence larger than the critical angle of the interface between the substrate and a medium that fills the slits. By adjusting a linear polarization state, θ, of the excitation radiation with a polarizer, the height of the detection volume in the slits, or similarly the penetration depth of the evanescent field, can be controlled.
    • 本发明涉及一种线栅生物传感器组件,用于检测 粒子,珠子或分子,其中可以通过以高于临界角度的角度照射线栅并且控制TE和TM偏振光的混合来调节线栅中的检测体积的高度。 线栅形成在基板上,并且具有短轴的狭缝小于所施加的辐射的衍射极限,并且长轴大于衍射极限。 以大于衬底和填充狭缝的介质之间的界面的临界角的入射角以穿过衬底的激发辐射照射线栅。 通过用偏振器调节激发辐射的线性偏振态α,可以控制狭缝中的检测体积的高度,或类似地,渐逝场的穿透深度。