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High-fineness cavity surface plasma resonance sensing equipment

A surface plasmon and sensing device technology, applied in the optical field, can solve the problem of low detection sensitivity, and achieve the effects of high detection sensitivity, low mechanical positioning requirements, and simple system

Inactive Publication Date: 2008-10-29
HANGZHOU DIANZI UNIV
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Problems solved by technology

The surface plasmon resonance sensor has considerable advantages, but there are still deficiencies, mainly because the light beam used for measurement has a total reflection in the sensing part, so that the surface plasmon resonance absorption signal detected by the detector is The signal acts on the beam once, so the detection sensitivity is not high, and there is a lot of room for improvement in detection sensitivity

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  • High-fineness cavity surface plasma resonance sensing equipment
  • High-fineness cavity surface plasma resonance sensing equipment
  • High-fineness cavity surface plasma resonance sensing equipment

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with drawings and embodiments.

[0015] A high-precision cavity surface plasmon resonance sensing device in this embodiment, the specific structure is as follows figure 1 shown.

[0016] The high-precision cavity surface plasmon resonance sensing device includes a laser light source 1 , a surface plasmon sensor 4 , and a photodetector 6 . The surface plasmon sensor 4 is a cylindrical prism, and its cross section is an isosceles triangle. The bottom surface of the surface plasmon sensor is coated with a plane metal reflective film 402, and the waist surface is coated with an incident high reflective film 401 and an outgoing high reflective film 403 respectively; The incident high reflection film 401 and the exit high reflection film 403 are spherical structures. The laser light source 1 is arranged on the incident high reflection film 401 side, and its emission light path is directed to the center of ...

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Abstract

The invention relates to a high-finesse cavity surface plasma resonance sensing device. The prior sensing device has low detection sensitivity. The sensing device comprises a laser source, a surface plasma sensor and a photo electrical detector. The surface plasma sensor is an isosceles triple prism, the bottom of the triple prism is plated with a plane metallic reflecting film, the side faces thereof are respectively plated with an incident high reflecting film and an outgoing high reflecting film, the sloping sides are an incident face and an outgoing face of a beam, the bottom surface is a sensing plane, and the incident face and the outgoing face of the beam are the high reflectivity surface of the beam, thus forming a high-finesse cavity. The light intensity of the detecting beam of the detector, which exits the prism, is the beam produced by the effects of repeated surface plasma resonance. The sensing device is characterized in high detection sensitivity, high modularization degree, simple system, etc.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a surface plasmon resonance sensing device, in particular to a surface plasmon resonance sensing system based on a high-precision cavity, which is mainly used in food safety, environmental monitoring, biology, chemistry and medicine Trace substance detection in other fields. technical background [0002] Surface Plasmon Resonance (SPR) is a physical optical phenomenon discovered by Wood at the beginning of last century. In the 1960s, German scientists Otto and Kretchmann independently invented the method of exciting surface plasmons with visible light. In the 1980s, Swedish scientist Liedberg used this technology for the detection of biomacromolecular interactions. Since then, surface plasmon resonance sensing technology has developed rapidly and developed into a very useful detection technology. [0003] Surface plasmon resonance sensing technology can be widely used in food s...

Claims

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Application Information

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IPC IPC(8): G01N21/55G01N21/41G01N21/552
Inventor 高秀敏王健
Owner HANGZHOU DIANZI UNIV
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