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A sensor based on nested waveguides

A waveguide and sensor technology, applied in the field of sensors, can solve the problems that the sensor cannot monitor the change of sample concentration and reaction process, the test system is complicated, and the demand for samples is large, so as to reduce the demand for samples, simplify the test system, and enhance the absorbance Effect

Active Publication Date: 2018-10-23
黄辉 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the refractive index of quartz is greater than that of organic plastics and water, light waves tend to travel in the side wall of the quartz tube rather than in the liquid, thus reducing the detection accuracy
[0006] In summary, the existing sensors cannot realize real-time monitoring of sample concentration changes and reaction progress, and the test system is complex, the detection accuracy is low, and the demand for samples is large

Method used

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  • A sensor based on nested waveguides
  • A sensor based on nested waveguides
  • A sensor based on nested waveguides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The overall structure of a sensor based on nested waveguides provided by this embodiment is as follows Figure 5 As shown, the two ends of the nested waveguide 15 are provided with a sealing cover 10, the sealing cover 10 is provided with a light-transmitting cover plate 14, the sealing cover 10 at one end of the light source 8 is provided with a sample inlet 11, and the optical detector 13 is at one end. The sealing cover 10 is provided with a sample outlet 12, and the opening direction of the sample inlet 11 and the sample outlet 12 is upward.

[0038] its nested waveguide 15 as figure 1 As shown, an outer capillary 1 and an inner optical waveguide 2 are included. Wherein, the outer capillary 1 is made of stainless steel, and the inner surface of the stainless steel capillary can reflect the detection beam 9; the inner optical waveguide 2 is a quartz rod, and the outer surface of the quartz rod is plated with a 50 nm thick gold film.

[0039] The detection beam 9 em...

Embodiment 2

[0041] The overall structure of a sensor based on nested waveguides provided by this embodiment is as follows Figure 5 As shown, the two ends of the nested waveguide 15 are provided with a sealing cover 10, the sealing cover 10 is provided with a light-transmitting cover plate 14, the sealing cover 10 at one end of the light source 8 is provided with a sample inlet 11, and the optical detector 13 is at one end. The sealing cover 10 is provided with a sample outlet 12, and the opening direction of the sample inlet 11 and the sample outlet 12 is upward.

[0042] its nested waveguide 15 as figure 2 As shown, an outer capillary 1 and an inner optical waveguide 2 are included. Wherein, the outer capillary 1 is made of quartz material, the inner surface of the quartz capillary is plated with a gold film for reflecting the detection beam 9, and gold particles 5 with a diameter of 40 nanometers are attached; the inner optical waveguide 2 is a plastic optical fiber.

[0043] The de...

Embodiment 3

[0046] The overall structure of a sensor based on nested waveguides provided by this embodiment is as follows Figure 5 As shown, the two ends of the nested waveguide 15 are provided with a sealing cover 10, the sealing cover 10 is provided with a light-transmitting cover plate 14, the sealing cover 10 at one end of the light source 8 is provided with a sample inlet 11, and the optical detector 13 is at one end. The sealing cover 10 is provided with a sample outlet 12, and the opening direction of the sample inlet 11 and the sample outlet 12 is upward.

[0047] its nested waveguide 15 as image 3 As shown, an outer capillary 1 and an inner optical waveguide 2 are included. Wherein, the outer capillary 1 is made of stainless steel, and the inner surface of the stainless steel capillary can reflect the detection beam 9; the inner optical waveguide 2 is a quartz rod, and silver particles 5 with a diameter of 30 nanometers are adhered to the outer surface of the quartz rod.

[0...

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Abstract

The invention relates to the field of sensors and especially relates to a sensor based on a sleeved waveguide tube. The sensor based on the sleeved waveguide tube includes a light source, a light detector and the sleeved waveguide tube. The light source for emitting a detection beam is disposed on one end of the sleeved waveguide tube and the light detector for receiving the detection beam is disposed on the other end of the sleeved waveguide tube. The sleeved waveguide tube includes an internal optical waveguide and an external capillary of which the side wall can reflect the detection beam. The internal optical waveguide is sleeved by the external capillary with a gap formed therebetween. The sensor is advantaged in that the side wall of the external capillary can reflect and constraint the detection beam, so that the detection beam emitted from the light source can be reflected and transmitted back-and-forth between the side wall of the external capillary and the internal optical waveguide. The sensor can be used for monitoring concentration change and reaction progress of a sample in real time. The sensor simplifies a test system, increases optical distance, improves detection precision and reduces demand quantity of the sample.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a sensor based on a nested waveguide, which can be used for the detection of refractive index and absorbance of liquid and gas samples in the field of biochemistry. Background technique [0002] Refractive index and absorbance are important material characteristic parameters. Relevant information such as the composition and concentration of the sample can be obtained by testing the refractive index or absorbance of the sample, and optical detection has the characteristics of anti-electromagnetic interference and fast response. Therefore, spectrophotometers (or colorimeters) based on absorbance detection and surface plasmon resonance (SPR) sensors based on refractive index detection are widely used in the field of biochemical analysis. [0003] For a spectrophotometer, the sample to be tested needs to be placed in a cuvette for testing (Sensors and Actuators B, 191, 561-566 (2014)). In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/05G01N21/31G01N21/552
CPCG01N21/05G01N21/31G01N21/554G01N2021/052
Inventor 黄辉渠波白敏张骥
Owner 黄辉
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