GhSPR sensor for detection of refractive index and detection method thereof

A detection method and sensor technology, applied in the field of SPR optical sensing, can solve the problems of low detection sensitivity, complex optical detection system, unfavorable instrument production, etc., and achieve the effect of high-sensitivity detection and improved sensitivity.

Pending Publication Date: 2018-02-16
SUZHOU YOUHAN INFORMATION TECH CO LTD
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Problems solved by technology

The detection sensitivity of traditional SPR sensors based on light intensity is low, and the optical detection...

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  • GhSPR sensor for detection of refractive index and detection method thereof
  • GhSPR sensor for detection of refractive index and detection method thereof
  • GhSPR sensor for detection of refractive index and detection method thereof

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Embodiment 1

[0038] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0039] like figure 1 As shown, the ghSPR sensing system includes a laser 1, a polarization splitter prism 2, a chopper 3, a splitter prism 4, an SPR sensing prism 5, a mirror A6, a mirror B7, and a displacement detector 8; the light emitted by the laser 1 passes through After the polarization beam splitter 2, it is divided into p polarized light and s polarized light;

[0040] The p-polarized light passes through the chopper 3 and the beam-splitting prism 4 in turn and then reaches the SPR sensing prism 5; the s-polarized light passes through the mirror A6 and the mirror B7 in turn and reflects back to the beam-splitting prism 4 and then reaches the SPR sensing prism 5, wherein the multi-stage reflection Pass through the optical chopper 3 in the mirror reflection optical path;

[0041] Optical chopper 3 controls p-polarized light and s-polarized light, and only one ...

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Abstract

The invention discloses a ghSPR sensor and a detection method for detecting the refractive index, comprising a laser, a polarization beam splitting prism, a beam splitting prism, a light chopper, a reflection mirror, an SPR sensing prism, and a displacement detector. The light emitted by the laser is vertically incident on the polarization beam splitter and divided into p-polarized light and s-polarized light. The p light passes through the chopper and the splitter prism in turn and reaches the SPR sensing prism, and the s light passes through the reflector A, the light chopper, the reflector B and the splitter prism in turn and then reaches the SPR sensing prism. The back of the SPR sensing prism is coupled with a microfluidic chip with a refractive index matching liquid, and the laser light reaches the displacement detector after being reflected on the gold film on the back of the prism. The invention has the advantages of simple structure, good stability and high sensitivity.

Description

technical field [0001] The invention belongs to the field of SPR optical sensing, and relates to an SPR sensor based on measuring Gus-Hansen displacement and a detection method. Background technique [0002] Surface plasmon resonance sensor (surface plasmon resonance sensor, hereinafter referred to as SPR sensor) is a high-precision refractive index sensor. There are two types of SPR sensors based on the prism coupling structure: (1) SPR sensors based on light intensity: by detecting the change of p-polarized light intensity as a physical quantity for detecting changes in refractive index; (2) SPR sensors based on phase: by using The phase change before and after reflection of the p-polarized light is used as the phase information of the SPR sensor to achieve high-precision detection of the refractive index. The detection sensitivity of traditional SPR sensors based on light intensity is low, and the optical detection system based on phase SPR sensors is very complicated, w...

Claims

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Application Information

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IPC IPC(8): G01N21/552
CPCG01N21/553
Inventor 何赛灵王怡沁江丽佟金广
Owner SUZHOU YOUHAN INFORMATION TECH CO LTD
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