CN102226817A - All-optical difference current monitoring device based on optical glass structure - Google Patents
All-optical difference current monitoring device based on optical glass structure Download PDFInfo
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- CN102226817A CN102226817A CN2011100755351A CN201110075535A CN102226817A CN 102226817 A CN102226817 A CN 102226817A CN 2011100755351 A CN2011100755351 A CN 2011100755351A CN 201110075535 A CN201110075535 A CN 201110075535A CN 102226817 A CN102226817 A CN 102226817A
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Abstract
The invention discloses an all-optical difference current monitoring device based on an optical glass structure, which relates to the field of optical control and solves the problems of serious disturbance on light beams in a detection process and low accuracy in judging a deflection angle of light by digital signals in the present detection device. In the All-optical difference current monitoring device based on the optical glass structure, a first incident light beam is optically rotated by a No.1 optical rotation system to get a first polarized light beam; the first polarized light beam is projected to a No.1 total reflector, and is further projected to a No.1 semi-passing semi-reflecting mirror after being reflected by the No.1 total reflector; the first polarized light beam is split into a reflected light beam and a transmitted light beam through the No.1 semi-passing semi-reflecting mirror, and the reflected light beam irradiates out along a direction perpendicular to an optic axis of the first polarized light beam; a second incident light beam is transmitted by a half-wave plate, and then, is projected to a No.2 optical rotation system; the No.2 optical rotation system optically rotates the second incident light beam to get a second polarized light beam; and the second polarized light beam is projected to the No.1 semi-passing semi-reflecting mirror, and is converged with the transmitted light beam transmitted by the No.1 semi-passing semi-reflecting mirror to an optical input end of a photoelectric detector. The all-optical difference current monitoring device based on the optical glass structure can be widely used in the field of control of light.
Description
Technical field
The present invention relates to optics control field.
Background technology
Existing detection instrument all is that light beam is through the light intensity sniffer behind the optical voltage transformer; the optical information that photoelectric commutator received in the light intensity sniffer is the optical information through changing behind the mutual induction of voltage; two photoelectric commutators use digital signal to compare the two-beam that receives; if two digital signals have difference; explanation has taken place unusually owing to voltage in the transmission of light; therefore make light beam that variation has also taken place, thereby start protective device through photoelectric commutator.The shortcoming that prior art exists is: use the cost height of two photodetectors, and in use be subjected to electromagnetic interference (EMI) strong, the error effect that occurs after light signal changes electric signal into is very big, thereby the accuracy rate of the polarization angle of two light beams that obtain is low.
Summary of the invention
The present invention is subjected to electromagnetic interference (EMI) serious in order to solve existing sniffer light beam in detection process, and adopts digital signal to judge the low problem of accuracy rate of the deflection angle of light, proposes the full equation of light stream monitoring device based on the optical glass structure.
Full equation of light stream monitoring device based on the optical glass structure, it comprises photodetector, it also comprises the optically-active system No. one, a total reflective mirror, a semi-transparent semi-reflecting lens, half-wave plate, No. two optically-active systems, the structure of a described optically-active system and No. two optically-active systems is identical, a described optically-active system is made up of optical glass framework and three catoptrons, described optical glass framework comprises four dignity, described four dignity are corresponding in twos, adjacent dignity is vertical mutually, three junctions in four junctions that adjacent two dignity form are fixed with a catoptron respectively, incident beam obtains outgoing beam respectively after three mirror reflects, the direction of described outgoing beam and the direction of incident beam differ 270 °;
First incident beam obtains first light beam after the optically-active of an optically-active system, described first light beam is incident to total reflective mirror No. one, and after a total reflective mirror reflection, be incident to semi-transparent semi-reflecting lens No. one, be divided into folded light beam and transmitted light beam through a semi-transparent semi-reflecting lens, described folded light beam is along the direction outgoing vertical with the optical axis of first light beam;
Second incident beam is incident to the optically-active system No. two after the half-wave plate transmission, after the optically-active of No. two optically-active systems, obtain second light beam, described second light beam is incident to semi-transparent semi-reflecting lens No. one, and after this semi-transparent semi-reflecting mirror reflection, converge to the light input end of photodetector with transmitted light beam through this semi-transparent semi-reflecting lens transmission.
Whether judgement produces interference fringe on photodetector, if do not have, and electric current normal transmission then; If have, then electric current occurs unusually, thereby realizes the monitoring of full equation of light stream.
Beneficial effect: the present invention adopts a photodetector that the deflection angle of two bundle incident beams is surveyed, and light beam is subjected to electromagnetic interference (EMI) little in detection process, judges the accuracy rate height of the deflection angle of light.
Description of drawings
Fig. 1 is a structural representation of the present invention; Fig. 2 is the structural representation of an optically-active system among the present invention; Fig. 3 is the structural representation of the specific embodiment of the invention two; Fig. 4 is the structural representation of the specific embodiment of the invention four.
Embodiment
Embodiment one, in conjunction with Fig. 1 and Fig. 2 this embodiment is described, full equation of light stream monitoring device based on the optical glass structure, it comprises photodetector 6, it also comprises optically-active system 1 No. one, a total reflective mirror 2, a semi-transparent semi-reflecting lens 3, half-wave plate 4, No. two optically-active systems 5, the structure of a described optically-active system 1 and No. two optically-active systems 5 is identical, a described optically-active system 1 is made up of optical glass framework 1-1 and three catoptron 1-2, described optical glass framework 1-1 comprises four dignity, described four dignity are corresponding in twos, adjacent dignity is vertical mutually, three junctions in four junctions that adjacent two dignity form are fixed with a catoptron 1-2 respectively, incident beam obtains outgoing beam respectively after three catoptron 1-2 reflections, the direction of described outgoing beam and the direction of incident beam differ 270 °;
First incident beam obtains first light beam after optically-active system 1 optically-active, described first light beam is incident to total reflective mirror 2 No. one, and after total reflective mirror 3 reflections, be incident to semi-transparent semi-reflecting lens 3 No. one, be divided into folded light beam and transmitted light beam through a semi-transparent semi-reflecting lens 3, described folded light beam is along the direction outgoing vertical with the optical axis of first light beam;
Second incident beam is incident to No. two optically-active system 5 after half-wave plate 4 transmissions, after No. two optically-active system 5 optically-actives, obtain second light beam, described second light beam is incident to semi-transparent semi-reflecting lens 3 No. one, and after 3 reflections of this semi-transparent semi-reflecting lens, converge to the light input end of photodetector 6 with transmitted light beam through these semi-transparent semi-reflecting lens 3 transmission.
Present embodiment adopts a photodetector to survey, and with respect to two methods that photodetector is surveyed of existing employing, cost is reduced significantly.
The difference that embodiment two, this embodiment and the embodiment one described full equation of light based on the optical glass structure flow monitoring device is, also comprise a light source 11 and No. two light sources 12, first incident beam is sent by a light source 11, and second incident beam is sent by No. two light sources 12.
The difference that embodiment three, this embodiment and the embodiment two described full equation of light based on the optical glass structure flow monitoring device is that a light source 11 and No. two light sources 12 are the semiconductor laser that wave band is 850nm.
The difference that embodiment four, this embodiment and the embodiment one described full equation of light based on the optical glass structure flow monitoring device is, it also comprises light source 21, No. two semi-transparent semi-reflecting lens 22 and No. two total reflective mirrors 23, the light beam that light source 21 sends is incident to semi-transparent semi-reflecting lens 22 No. two, be divided into folded light beam and transmitted light beam through No. two semi-transparent semi-reflecting lens 22, described folded light beam is incident to total reflective mirror 23 No. two, forms first incident beam after No. two total reflective mirror 23 reflections; Transmitted light beam through No. two semi-transparent semi-reflecting lens 22 transmissions forms second incident beam.
The difference that embodiment five, this embodiment and the embodiment one described full equation of light based on the optical glass structure flow monitoring device is that light source 21 is the semiconductor laser of 850nm for wave band.
The difference that embodiment six, this embodiment and the embodiment one described full equation of light based on the optical glass structure flow monitoring device is that first incident beam and second incident beam are identical light beams.
The difference of the described full equation of light stream monitoring device based on the optical glass structure of embodiment seven, this embodiment and embodiment one, two, three, four, five or six is, optical glass framework 1-1 is made by the ZF-7 magneto-optic memory technique in optically-active system 1 and No. five optically-active systems 4.
The difference that embodiment eight, this embodiment and the embodiment seven described full equation of light based on the optical glass structure flow monitoring device is that all beam Propagation processes are all carried out in polarization maintaining optical fibre.
Principle of work: the polarization effect that the two-beam that is based on Faraday magnetooptical effect that the present invention adopts is interfered; be used for through the difference of the two-beam behind the optical current mutual inductor by their polarization directions of image intensity differentiation after interfering, thus the starting current protective device.
Light transmission of the present invention is partly transmitted in polarization maintaining optical fibre, the polarization state of second incident beam that the polarization state of first incident beam of described system input and system import is respectively perpendicular to the direction of propagation of light, described two optical glass inside are respectively arranged with electrified wire, this lead produces magnetic field, two blocks of optical glass place magnetic field, described first incident beam changes through the polarization angle after optically-active system 1, described second incident beam is through behind the half-wave plate 4, described half-wave plate 4 makes the polarization state of second incident beam change 90 °, and the polarization state of described second incident beam is parallel with the direction of propagation of light; Second incident beam parallel with the direction of propagation of light produces rotation effect through No. two optically-active system 5 backs, and promptly variation has taken place the deflection angle of second incident beam;
Whether judgement is identical through the deflection angle that first incident beam of an optically-active system 1 and second incident beam through No. two optically-active systems 5 take place, if first incident beam is identical with the deflection angle of second incident beam, first incident beam that deflection angle then taken place passes through semi-transparent semi-reflecting lens 3 (just getting its transmission function) and second incident beam that deflection angle has taken place after through first total reflective mirror 2 again through semi-transparent semi-reflecting lens 3 (getting its reflection function), the common directive photodetector of the light beam that converges after the reflection; Because the polarization state of first incident beam and second incident beam is completely orthogonal, therefore on photodetector 6, there is not the generation of interference fringe, judge this electric current normal transmission;
If first incident beam is different with the deflection angle of second incident beam, illustrate that then wire short-circuiting or generation are unusual, the electric current of optically-active system 1 top of the second incident beam process will be oppositely; Magnetic field in the described No. two optically-active systems 5 also will change; according to Faraday effect; after first incident beam and second incident beam converge to photodetector 6; because the polarization state of two-beam is not a quadrature; so two-beam will interfere; produce interference fringe, the interference situation of the striped of surveying by photodetector 6 as can be known in the electric wire electric current occur unusual, and then starting current protective device.
Claims (8)
1. the full equation of light based on the optical glass structure flows monitoring device, it comprises photodetector (6), it is characterized in that: further comprising an optically-active system (1), a total reflective mirror (2), a semi-transparent semi-reflecting lens (3), half-wave plate (4), No. two optically-active systems (5), the structure of a described optically-active system (1) and No. two optically-active systems (5) is identical, a described optically-active system (1) is made up of optical glass framework (1-1) and three catoptrons (1-2), described optical glass framework (1-1) comprises four dignity, described four dignity are corresponding in twos, adjacent dignity is vertical mutually, three junctions in four junctions that adjacent two dignity form are fixed with a catoptron (1-2) respectively, incident beam obtains outgoing beam respectively after three catoptrons (1-2) reflection, the direction of described outgoing beam and the direction of incident beam differ 270 °;
First incident beam obtains first light beam after an optically-active system (1) optically-active, described first light beam is incident to a total reflective mirror (2), and after a total reflective mirror (3) reflection, be incident to a semi-transparent semi-reflecting lens (3), be divided into folded light beam and transmitted light beam through a semi-transparent semi-reflecting lens (3), described folded light beam is along the direction outgoing vertical with the optical axis of first light beam;
Second incident beam is incident to No. two optically-active systems (5) after half-wave plate (4) transmission, after No. two optically-active systems (5) optically-active, obtain second light beam, described second light beam is incident to a semi-transparent semi-reflecting lens (3), and after the reflection of this semi-transparent semi-reflecting lens (3), converge to the light input end of photodetector (6) with transmitted light beam through this semi-transparent semi-reflecting lens (3) transmission.
2. the full equation of light stream monitoring device based on the optical glass structure according to claim 1, it is characterized in that it also comprises a light source (11) and No. two light sources (12), first incident beam is sent by a light source (11), and second incident beam is sent by No. two light sources (12).
3. the full equation of light stream monitoring device based on the optical glass structure according to claim 2 is characterized in that a light source (11) and No. two light sources (12) are the semiconductor laser that wave band is 850nm.
4. the full equation of light stream monitoring device based on the optical glass structure according to claim 1, it is characterized in that it also comprises light source (21), No. two semi-transparent semi-reflecting lens (22) and No. two total reflective mirrors (23), the light beam that light source (21) sends is incident to No. two semi-transparent semi-reflecting lens (22), be divided into folded light beam and transmitted light beam through No. two semi-transparent semi-reflecting lens (22), described folded light beam is incident to No. two total reflective mirrors (23), forms first incident beam after No. two total reflective mirrors (23) reflection; Transmitted light beam through No. two semi-transparent semi-reflecting lens (22) transmission forms second incident beam.
5. the full equation of light stream monitoring device based on the optical glass structure according to claim 4 is characterized in that light source (21) is the semiconductor laser of 850nm for wave band.
6. the full equation of light stream monitoring device based on the optical glass structure according to claim 1 is characterized in that first incident beam and second incident beam are identical light beams.
7. according to claim 1,2,3,4,5 or 6 described full equation of light stream monitoring devices, it is characterized in that optical glass framework (1-1) is made by the ZF-7 magneto-optic memory technique in an optically-active system (1) and No. five optically-active systems (4) based on the optical glass structure.
8. the full equation of light stream monitoring device based on the optical glass structure according to claim 1 is characterized in that all beam Propagation processes all carry out in polarization maintaining optical fibre.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100755351A CN102226817A (en) | 2011-03-28 | 2011-03-28 | All-optical difference current monitoring device based on optical glass structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100755351A CN102226817A (en) | 2011-03-28 | 2011-03-28 | All-optical difference current monitoring device based on optical glass structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156210A (en) * | 2011-03-28 | 2011-08-17 | 哈尔滨工业大学 | All-fiber difference stream monitoring device based on ferromagnetic concentrator ring structure |
| CN103698585A (en) * | 2014-01-10 | 2014-04-02 | 哈尔滨工业大学 | Multi-range optical current sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2722258Y (en) * | 2004-05-28 | 2005-08-31 | 哈尔滨工程大学 | Electric current probe of optical glass without reciprocal effect |
| CN101769950A (en) * | 2009-12-30 | 2010-07-07 | 哈尔滨工业大学 | Full-optical fiber difference stream measuring device based on faraday effect |
| CN101975882A (en) * | 2010-09-16 | 2011-02-16 | 哈尔滨工业大学 | Difference-stream detecting method based on BSO (Bi12SiO20) crystal and device for realizing same |
-
2011
- 2011-03-28 CN CN2011100755351A patent/CN102226817A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2722258Y (en) * | 2004-05-28 | 2005-08-31 | 哈尔滨工程大学 | Electric current probe of optical glass without reciprocal effect |
| CN101769950A (en) * | 2009-12-30 | 2010-07-07 | 哈尔滨工业大学 | Full-optical fiber difference stream measuring device based on faraday effect |
| CN101975882A (en) * | 2010-09-16 | 2011-02-16 | 哈尔滨工业大学 | Difference-stream detecting method based on BSO (Bi12SiO20) crystal and device for realizing same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156210A (en) * | 2011-03-28 | 2011-08-17 | 哈尔滨工业大学 | All-fiber difference stream monitoring device based on ferromagnetic concentrator ring structure |
| CN103698585A (en) * | 2014-01-10 | 2014-04-02 | 哈尔滨工业大学 | Multi-range optical current sensor |
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Inventor after: Shen Yan Inventor after: Guo Zhizhong Inventor after: Zhang Guoqing Inventor after: Yu Wenbin Inventor after: Lu Zhongfeng Inventor after: Wu Lei Inventor after: Huang Hao Inventor before: Shen Yan Inventor before: Guo Zhizhong Inventor before: Zhang Guoqing Inventor before: Yu Wenbin Inventor before: Lu Zhongfeng Inventor before: Wu Lei |
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Free format text: CORRECT: INVENTOR; FROM: SHEN YAN GUO ZHIZHONG ZHANG GUOQING YU WENBIN LU ZHONGFENG WU LEI TO: SHENYAN GUO ZHIZHONG ZHANG GUOQING YU WENBIN LU ZHONGFENG WU LEI HUANG HAO |
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Application publication date: 20111026 |