×

Surface plasmon resonance sensor and sensor unit

  • US 20050112028A1
  • Filed: 09/23/2004
  • Published: 05/26/2005
  • Est. Priority Date: 09/24/2003
  • Status: Abandoned Application
First Claim
Patent Images

1. A surface plasmon resonance sensor comprising a light source emitting a light beam, a sensor unit formed by a dielectric block transparent to the light beam, a metal film provided on one surface of the dielectric block, and a sample holding portion which holds a sample on the metal film, a light beam projecting means which causes the light beam to enter the dielectric block to impinge upon the interface between said one surface of the dielectric block and the metal film so that total internal reflection conditions are satisfied at the interface, and a photodetector means which detects the intensity of the light beam reflected in total internal reflection at the interface and detects a state of attenuation in total internal reflection, wherein the improvement comprises that the relation −



  • 10

    5


    (n3·

    Δ

    n1−

    n1·

    Δ

    n3)≦



    10

    5
    is satisfied wherein n1 and n3 represent refractive indexes of the solvent of the sample liquid and the dielectric block, and Δ

    n1 and Δ

    n3 represent the rates of temperature-change dn1/dt and dn3/dt of the refractive indexes of the solvent of the sample liquid and the dielectric block.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×