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Glass prism SPR sensor detection system based on P polarized light

A detection system and sensor technology, which is applied in the phase influence characteristic measurement and other directions, can solve the problems affecting the detection accuracy of the wavelength modulation prism SPR sensor, affecting the determination of the minimum resonance strength point, affecting the resonance wavelength detection, etc., to improve the distributed detection effect and detection range, ensure overall performance stability, and reduce the effect of adhesion

Inactive Publication Date: 2009-07-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

In this way, if the valley bottom is too flat, it will inevitably affect the determination of the minimum resonance intensity point, thereby affecting the detection of the resonance wavelength, and also seriously affecting the detection accuracy of the wavelength-modulated prism SPR sensor.

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  • Glass prism SPR sensor detection system based on P polarized light
  • Glass prism SPR sensor detection system based on P polarized light
  • Glass prism SPR sensor detection system based on P polarized light

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Embodiment Construction

[0034] Depend on figure 1 It can be seen that the specific composition of the prism SPR sensor detection system based on P polarized light of the present invention is that the light sent by the broadband light source 1 (available HL-2000 halogen tungsten broadband light source) is incident on the prism SPR sensor based on the Kretschmann model through the multimode optical fiber 2 4, the reflected light is coupled into the multimode fiber 6 through the convex lens 5 and is introduced into the spectrometer 7 (usable USB2000 spectrometer). The spectrometer 7 is connected to the computer 9 through the USB data line. It is characterized in that a polarizing beam splitting prism 3 with a spectral bandwidth of 400nm-1000nm is further provided between the light source 1 and the prism SRP sensor 4 .

[0035] The computer uses a filtering algorithm to analyze the collected spectrum, and obtains a relatively smooth relationship curve between the normalized intensity of reflected light ...

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Abstract

The invention discloses a prism SPR sensor detection system based on P-polarized light, which belongs to the technical field of the prism SPR sensor systems. The prism SPR sensor detection system orderly consists of a light source (1), a multimode optical fiber (2), a prism SPR sensor (4), a convex lens (5), a spectrometer (7) which receives rays transmitted by the convex lens (5) through a multimode optical fiber (6), and a computer (9) connected with the spectrometer (7). The prism SPR sensor detection system is characterized in that a polarization splitting prism (3) with a splitting bandwidth of between 40 and 1000nm is also arranged between the light source (1) and the prism SPR sensor (4). The method ensures that the half-wave widths of resonance wave troughs in a spectrum are reduced, more contributes to the analysis and detection of resonant wavelength parameters in a wavelength modulation method, and is also favorable for improving adhesion phenomenon of various resonance wave troughs of a resonance spectrum detected by a prism distributed measurement system. The prism SPR sensor detection system has the characteristics of simple light path, narrow resonance wave troughs, high detection accuracy, and so on.

Description

technical field [0001] The invention relates to a novel prism SPR sensor system that combines the light-splitting characteristics of a polarization beamsplitter prism with the prism SPR sensor detection technology, which effectively improves the detection accuracy of this type of sensor, and can be applied to various parameters such as refractive index and temperature. Measure precisely. Background technique [0002] Polarization Beam Splitter (PBS, Polarization Beam Splitter) was first proposed by S.MaoNeille and first actually prepared by M.Banning. Its design principle is to find such an incident angle, so that it satisfies Brewster's angle for the interface of two different refractive indices. Under such conditions, the reflection of P-polarized light completely disappears. These two materials can be stacked alternately to form a multilayer film stack without any reflection of P polarized light. For practical thin film materials, this condition can only be realized whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/43
Inventor 曾捷梁大开赵志远张晓丽万艳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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