Patent ID: 8836931
Filing Date: 2014-09-16
Classification: G01N

Abstract:
1. A detection system for acquiring the SPR angle, comprising: a modulatable SPR sensor to be detected; an incident light source for generating a light with a single wavelength and the polarization state being a transverse magnetic wave that is incident on said modulatable SPR sensor; a photoelectric detector for receiving the reflected light and converting the light intensity into electrical signals; a narrowband filter system for filtering the output of said photoelectric detector to obtain the light intensity value; a modulated signal source for generating an alternating current signal that is used to modulate said modulatable SPR sensor and thus change the shape of the SPR peak generated by the light incident on said modulatable SPR sensor; and a data processing system for recording the corresponding relationship between the incident angle and the intensity of the filtered reflected light and further obtaining the resonance angle of said modulatable SPR sensor.