CN103398671B - Optical sensor of portable fast recognition instrument for fiber particles - Google Patents
Optical sensor of portable fast recognition instrument for fiber particles Download PDFInfo
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- CN103398671B CN103398671B CN201310365282.0A CN201310365282A CN103398671B CN 103398671 B CN103398671 B CN 103398671B CN 201310365282 A CN201310365282 A CN 201310365282A CN 103398671 B CN103398671 B CN 103398671B
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- light beam
- light
- optical sensor
- wave plate
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Abstract
The invention discloses an optical sensor of a portable fast recognition instrument for fiber particles. A laser is fixed on an outer frame of a metal cavity; parallel light beam in the direction of a system spindle is formed after light path distribution; circularly polarized light beam is formed after the parallel light beam passes through a polarizing film and a one fourth wave plate; after the light beam and an airflow sample converge in a photosensitive area, an incident light beam in the original direction goes into an optical trap, and the optical trap is made of metals, coated with a light absorption material on the inner wall, and fixed in an outer frame body of the sensor; forward scattered light forms parallel light beam after filtered by a lens group and a diaphragm, and the parallel light beam goes into a polarizing prism after passing through the one fourth wave plate; two photomultipliers are arranged in two mutually perpendicular directions of the polarizing prism and used for detecting light intensity in the two directions; and signals received by the photomultipliers are amplified and processed after output. The optical sensor is reasonable in structure, small in size, easy to process and low in cost, and can fast recognize the fiber particles in real time.
Description
Technical field
The present invention relates to a kind of optical sensor.
Background technology
Fibrous particle appears at many occasions, as contaminate particulate in chemical fibre, textile fabrics, carbon fiber, atmosphere etc.In order to identify size and the shape of these fibrous particles, the method in past is to adopt high-power microscope that sample is observed and measured, but the shape that needs quick real-time judge particulate in some occasion, microscopic examination method is beneficial to timely reaction and the monitoring of processing, so can not adapt to real-time requirement.Although also there are some real-time detection of particulates instruments in the past, these instruments are mostly used for measuring the size of particulate, helpless to the detection of shape.For this reason, the object of the present invention is to provide rational in infrastructure, cost is not high, be convenient for carrying, the optical sensor that can identify fast a kind of portable instrument of fibrous particle of good working effect.
Summary of the invention
The object of the present invention is to provide a kind of rational in infrastructurely, be convenient for carrying, working effect, can identify fast the optical sensor of the quick identifier of portable fiber particle of fibrous particle.
Technical solution of the present invention is:
The optical sensor of the quick identifier of a kind of portable fiber particle, it is characterized in that: comprise cylindrical metal chamber, on the housing of wire chamber, be fixedly mounted with laser instrument, and form the parallel beam along system spindle direction after light path layout, after a polaroid and a quarter wave plate, form circularly polarized light beam, this light beam and sample air-flow are compiled in behind photosensitive area, and former direction incident beam is injected light trapping, and described light trapping is made of metal, and inwall scribbles light absorbent, and be fixed in the outer frame body of this sensor; Forward scattering light forms parallel beam after lens combination and diaphragm filtering, after a quarter wave plate, incide on a polarizing prism, in two orthogonal directions of this polarizing prism, 2 photomultipliers are set, be used for detecting the light intensity on this both direction, the signal that photomultiplier receives amplifies, processes after output.
Cylindrical metal chamber is by rectangle metallic object and draws into cylindrical cavity within it and form metallic cavity, and this columniform rotation axes of symmetry main shaft that is optical system, and all optical systems are all packed in metallic cavity, and this metallic object is long * wide * thick is
.
Laser power is the semiconductor laser of 10 ~ 30mW.
The present invention is rational in infrastructure, fast Real time identification fibrous particle.Although the microscopic examination method in past can be identified shape of particle, can not accomplish real-time or online; And existing real-time detection of particles instrument can only detect particle size, can not identify it and belong to any class shape.The all optical systems of the present invention are all packed in metallic cavity, and volume is little, are very beneficial for being developed to quick and portable instrument.Cylindrical metal cavity handling ease of the present invention, with low cost.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural representation of one embodiment of the invention.
Embodiment
Referring to Fig. 1, because semiconductor laser 1 volume is little, can be fixed on the housing of cylindrical metal cavity 22, the light beam of its ejaculation is mapped on lens 3 along system spindle direction after catoptron 2, after diaphragm 4 filtering and lens 5, form collimated light beam again, after diaphragm 6, form the good parallel beam of a homogeneity, then incide on polaroid 7 and quarter wave plate 8, form circularly polarized light and accurately incide photosensitive area along system spindle direction, sample gas is imported by inlet channel 9, through outlet passageway 10, flow out, enter outlet passageway vertical with system spindle, dilution pure gas passage 11 outer being rolled on inlet channel 9, its outlet also exports more close photosensitive area than inlet channel, reach like this diluted sample gas and reduce the object in microparticle residue cylindrical cavity.In this circularly polarized light beam and sample gas, particle forms scattered light after meeting, and former direction incident beam, injects light trapping 14 by catoptron 13, and it is made of metal and inwall scribbles light absorbent, and is fixed in the outer frame body of ball chamber mirror.Forward scattering light is scioptics 12,15,17 and the rear formation parallel beam of diaphragm 16, after quarter wave plate 18, incide on polarizing prism 19 again, in two mutually perpendicular directions of this polarizing prism, split two photomultipliers 20,21, diaphragm 16 plays filter action, prevents that parasitic light from entering photomultiplier.The signal that photomultiplier detects is exaggerated after output, processing etc., with this, identifies in real time fast fibrous particle.
Claims (2)
1. the optical sensor of the quick identifier of portable fiber particle, it is characterized in that: comprise cylindrical metal chamber, on the housing of wire chamber, be fixedly mounted with laser instrument, and after light path layout, form the parallel beam along system spindle direction, after a polaroid and a quarter wave plate, form circularly polarized light beam, this light beam and sample air-flow are compiled in behind photosensitive area, former direction incident beam is injected light trapping, described light trapping is made of metal, and inwall scribbles light absorbent, and be fixed in the outer frame body of this sensor; Forward scattering light forms parallel beam after lens combination and diaphragm filtering, after a quarter wave plate, incide on a polarizing prism, in two orthogonal directions of this polarizing prism, 2 photomultipliers are set, be used for detecting the light intensity on this both direction, the signal that photomultiplier receives amplifies, processes after output; Cylindrical metal chamber is that also drawing into cylindrical cavity within it forms metallic cavity by rectangle metallic object, and the main shaft that this columniform rotation axes of symmetry is optical system, all optical systems are all packed in metallic cavity, and this metallic object is long * wide * thick is 24 * 9 * 6cm.
2. the optical sensor of the quick identifier of portable fiber particle according to claim 1, is characterized in that: laser instrument is that power is the semiconductor laser of 10～30mW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310365282.0A CN103398671B (en) | 2013-08-21 | 2013-08-21 | Optical sensor of portable fast recognition instrument for fiber particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310365282.0A CN103398671B (en) | 2013-08-21 | 2013-08-21 | Optical sensor of portable fast recognition instrument for fiber particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103398671A CN103398671A (en) | 2013-11-20 |
| CN103398671B true CN103398671B (en) | 2014-11-26 |
Family
ID=49562344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310365282.0A Expired - Fee Related CN103398671B (en) | 2013-08-21 | 2013-08-21 | Optical sensor of portable fast recognition instrument for fiber particles |
Country Status (1)
| Country | Link |
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| CN (1) | CN103398671B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4884886A (en) * | 1985-02-08 | 1989-12-05 | The United States Of America As Represented By The Department Of Energy | Biological particle identification apparatus |
| CN101699265A (en) * | 2009-10-28 | 2010-04-28 | 上海理工大学 | Device and method for measuring scattering particles by using dynamic polarized light |
| CN102323191A (en) * | 2008-09-26 | 2012-01-18 | 株式会社堀场制作所 | Device for measuring physical property of particle |
| CN102519850A (en) * | 2011-11-07 | 2012-06-27 | 南通大学 | Optical sensor capable of detecting granularity and shape feature of particles in real time |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6859276B2 (en) * | 2003-01-24 | 2005-02-22 | Coulter International Corp. | Extracted polarization intensity differential scattering for particle characterization |
-
2013
- 2013-08-21 CN CN201310365282.0A patent/CN103398671B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4884886A (en) * | 1985-02-08 | 1989-12-05 | The United States Of America As Represented By The Department Of Energy | Biological particle identification apparatus |
| CN102323191A (en) * | 2008-09-26 | 2012-01-18 | 株式会社堀场制作所 | Device for measuring physical property of particle |
| CN101699265A (en) * | 2009-10-28 | 2010-04-28 | 上海理工大学 | Device and method for measuring scattering particles by using dynamic polarized light |
| CN102519850A (en) * | 2011-11-07 | 2012-06-27 | 南通大学 | Optical sensor capable of detecting granularity and shape feature of particles in real time |
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| Publication number | Publication date |
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| CN103398671A (en) | 2013-11-20 |
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Granted publication date: 20141126 Termination date: 20160821 |