Multi-light path optical fiber fluorescent sensor

A fluorescence sensor, multi-optical path technology, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of long measurement period, increased cost, impracticality, etc., and achieve the effect of suppressing background interference, improving receiving efficiency, and simple structure

Inactive Publication Date: 2011-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The first method requires multiple probes to work at the same time, or manual intervention; the second method has a long measurement cycle and is not suitable for occasions where the concentration of the target component changes rapidly; the third method is open to the field for sensors in the visible light band In the environment, the external backgrou

Method used

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  • Multi-light path optical fiber fluorescent sensor
  • Multi-light path optical fiber fluorescent sensor

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Such as figure 1 As shown, a dual-optical fiber optic fluorescence sensor for directly detecting fluorescent substances, its structure includes two excitation light sources 101 (light emitting diodes), two excitation fibers 102, and two receiving fibers 103;

[0029] The incident end of each excitation fiber 102 is respectively coupled with a light source 101 in a one-to-one correspondence;

[0030] Each receiving fiber 103 is paired with an excitation fiber 102, the incident end face of the receiving fiber 103 and the emission end face of the corresponding excitation fiber 102 are in the same plane, and the distance between their end faces is 0-5mm;

[0031] The output ends of the two receiving optical fibers 103 are coupled to the optical window of the photoelectric conversion device 105 through the filter 104.

[0032] The excitation light source 101, excitation fiber 102, receiving fiber 103, filter 104, and photoelectric conversion device 105 of the optica...

Example Embodiment

[0041] Example 2

[0042] Such as figure 2 As shown, a 3-optical fiber optic fluorescence sensor for indirect detection of non-fluorescent substances,

[0043] The difference from Embodiment 1 is that the light path is in 3 groups, and there are 3 excitation light sources 101 and 3 excitation fibers 102 coupling the incident ends, and the 3 receiving fibers 103 are combined with the filter 104 and the photoelectric conversion device 105. coupling.

[0044] A fluorescent sensing film substrate 301 and a fluorescent sensing film 302 are sequentially arranged on the plane surface where the exit end of the excitation fiber 102 and the entrance end of the receiving fiber 103 are located. The sensing film substrate 301 is attached to the end surface of the sensor probe. Tight and secure.

[0045] The excitation light source 101, excitation fiber 102, receiving fiber 103, filter 104, and photoelectric conversion device 105 of the optical fiber sensor are coupled and fixed by a sleeve assem...

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Abstract

The invention relates to a multi-light path optical fiber fluorescent sensor. In the sensor, two or three excitation light sources are adopted; each light source is correspondingly coupled with one transmitting optical fiber respectively; the receiving end of a receiving optical fiber is combined with the output end of an excitation optical fiber in a pair and an angle of between 15 and 45 degrees is formed; and fluorescent light is combined together and enters a photovoltaic conversion device to be detected through the same filter after being received and transmitted by two or three receiving optical fibers. Multi-light path design is adopted in the sensor, and measuring ends are a given distance away from each other, so that the accuracy and the repeatability for measuring the concentration of a fluorescent substance in a non-uniform fluorescent medium can be improved, and the irradiation region of exciting light is also improved by 1 to 1.5 times to further improve the intensity of the fluorescent light and the flexibility of the detection. The sensor has a simple structure and is convenient to use and low in cost, non-solid fluorescent substances such as gas, liquid and the like can be directly detected, and the sensor can be combined with a fluorescent sensing film to detect non-fluorescent substances.

Description

technical field [0001] The invention relates to a multi-optical optical fiber fluorescence sensor. Specifically, it relates to an in-situ multi-detection zone sensor, which can directly detect non-solid fluorescent substances such as gas and liquid, and can also be combined with a fluorescent sensing film to indirectly detect non-fluorescent substances. Background technique [0002] Optical fiber chemical sensor is a sensor made of chemiluminescence, bioluminescence, photosensitive device and optical fiber technology. It has the characteristics of fast response, high sensitivity, strong anti-electromagnetic interference ability, small size, low power consumption, high temperature and corrosion resistance, etc. Applied to the characteristics of harsh environments where other sensors cannot work, and in many aspects such as environmental monitoring, reaction remote monitoring, biomedicine and clinical medicine, analysis and control of hazardous sites, it can make precise analy...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 关亚风
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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