CN104111112A - All-optical fiber input-output-interface monochromator - Google Patents
All-optical fiber input-output-interface monochromator Download PDFInfo
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- CN104111112A CN104111112A CN201310138671.XA CN201310138671A CN104111112A CN 104111112 A CN104111112 A CN 104111112A CN 201310138671 A CN201310138671 A CN 201310138671A CN 104111112 A CN104111112 A CN 104111112A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 58
- 230000003287 optical effect Effects 0.000 claims abstract description 98
- 238000001914 filtration Methods 0.000 abstract description 4
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- 230000005540 biological transmission Effects 0.000 description 5
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- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The invention provides an all-optical fiber input-output-interface monochromator. The all-optical fiber input-output-interface monochromator includes the following components of: an input optical fiber used for inputting incident light, a high-pass linear variable filter which is used for reflecting short-wave light beams in the incident light, the wavelength of the short-wave light beams being shorter than selected wavelength; a low-pass linear variable filter which is used for reflecting long-wave light beams in the incident light, the wavelength of the long-wave light beams is longer than the selected wavelength; a first optical focusing element which is located in a light path and focuses the incident light; a second optical focusing element which is located in the light path and focuses light beams which pass through the low-pass linear variable filter or high-pass linear variable filter; an optical reflecting and focusing element assembly which is used for reflecting and focusing light beams which pass through the high-pass variable filter and the low-pass linear variable filter; a linear variable filter control system which is used for controlling the movement of the high-pass variable filter and the low-pass linear variable filter so as to make the linear variable filters located at specified positions and realize monochromatic filtering; and an output optical fiber which is used for outputting long-wave, short-wave and narrowband monochromatic light.
Description
Technical field
The present invention relates to spectral analysis field and fiber optic component field, relate in particular to a kind of monochromator of full optical fiber IO interface.
Background technology
At present, in spectral measurement, the dispersion element of monochromator used is mainly the dispersion element of grating and prism and so on, and after dispersion, the light of a certain wavelength generally forms bar shaped laser spot, is difficult to be focused into very little hot spot and exports from optical fiber.In addition, conventional monochromator emergent light is a wave band, and the light of other wavelength is all processed as parasitic light, cannot utilize.
Therefore, need badly and a kind of be easy to focus on and can optical fiber output, high-contrast and export the monochromator of wave band more.
Summary of the invention
The object of the invention is to for spectral measurement and analyzing provides a kind of optical fiber interface, high-contrast, three kinds of monochromators of exporting the full optical fiber IO interface of wave bands, can be widely used in optical detection system beam splitting system, in fluorescent spectroscopy.
The monochromator of full optical fiber IO interface of the present invention, comprising: input optical fibre, for inputting incident light; High pass linear variable optical filter, is less than the shortwave light beam of selecting wavelength for the wavelength reflecting the incident light; Low pass linear variable optical filter, is greater than the long wave light beam of selecting wavelength for the wavelength reflecting the incident light; The first optical focus element, it is arranged in light path incident light is focused on; The second optical focus element, it is arranged in light path the light beam by described high pass or low pass linear variable optical filter is focused on; Optical reflection concentrating element group, carries out reflect focalization for the light beam to by described high pass and low pass linear variable optical filter; Linear variable optical filter control system, for controlling the movement of described high pass and low pass linear variable optical filter, filter to realize monochrome in the position that makes described linear variable optical filter be positioned at regulation; Arrowband monochromatic light output optical fibre, for exporting arrowband monochromatic light.
Preferably, this monochromator also comprises shortwave output optical fibre, for receiving and export the shortwave light beam of described high pass linear variable optical filter reflection.
Preferably, this monochromator also comprises long wave output optical fibre, for receiving and export the long wave light beam of described low pass linear variable optical filter reflection.
Preferably, this monochromator also comprises the 3rd focusing optic, for described arrowband monochromatic light being focused on and is coupled to described arrowband monochromatic light output optical fibre.
Preferably, this monochromator also comprises the 4th focusing optic, for described shortwave light beam is focused on and be coupled to described shortwave output optical fibre.
Preferably, this monochromator also comprises the 5th focusing optic, for described long wave light beam is focused on and be coupled to described long wave output optical fibre.
Preferably, this focusing optic can be achromatic convex lens or off axis paraboloidal mirror to or concave mirror etc. there is the optical element of focussing force.
Preferably, described linear variable optical filter control system comprises: first guide rail that can move horizontally perpendicular to light path and the second guide rail, on described the first guide rail, fix described high pass linear variable optical filter, on described the second guide rail, fix described low pass linear variable optical filter; Step motor, it is connected with described the first and second guide rails respectively; And control part, it is controlled described step motor and moves described the first guide rail and the second guide rail, so that described high pass and low pass linear variable optical filter move to the position of regulation.
Preferably, described linear variable optical filter control system also comprises: storage part, and for storing the positional information of described high pass and low pass linear variable optical filter.
By said structure, the present invention has the following advantages.First, optical fiber monochromator of the present invention adopts full optical fiber interface, be convenient to directly the light beam in fiber medium to be carried out to monochrome and process, and emergent light is circle spot, is easy to focusing.Secondly, in optical filtering place of linear variable filter, hot spot is converged, this just makes hot spot less, and contrast is higher, has avoided large spot to produce aberration by linear variable optical filter.In addition, the present invention repeatedly carries out monochrome through the method for a pair of high low pass linear variable optical filter to incident light after light beam is focused on and processes, and exports the light beam of the three kinds of wave bands in He Liangge broadband, an arrowband.Therefore, the monochromatic light obtaining by monochromator of the present invention has and is easy to focus on, and the high and beneficial effect that can export three wave bands of contrast, has very large advantage and potentiality in this field.
Accompanying drawing explanation
Fig. 1 is the structural representation of monochromator of the present invention.
Fig. 2 is the linear variable optical filter control system structural representation in monochromator of the present invention.
Fig. 3 is according to the structural drawing of the monochromator of a specific embodiment of the present invention.
Embodiment
Below, in connection with drawings and Examples, the present invention is described in detail.Following examples are not limitation of the present invention.Do not deviating under the spirit and scope of inventive concept, variation and advantage that those skilled in the art can expect are all included in the present invention.
Fig. 1 is the structural representation of monochromator of the present invention.This monochromator comprises input optical fibre 1, arrowband monochromatic light output optical fibre 2, long wave output optical fibre 3, shortwave output optical fibre 4, optical focus element 5,7, high pass linear variable optical filter 6, low pass linear variable optical filter 8, optical reflection concentrating element group 9 and linear variable optical filter control system 10.Linear variable optical filter control system 10 is controlled two linear variable optical filters 6,8 and is moved horizontally in the direction perpendicular to light beam, can control by adjusting two optical filter positions the wavelength of monochromatic gating like this.Beam focus is positioned at linear variable optical filter 6,8 places.
Fig. 2 is the structural representation of above-mentioned linear variable optical filter control system.As shown in Figure 2, linear variable optical filter control system 10 comprises fixing on the first guide rail 13 and the second guide rail 14, the first guide rails and on described high pass linear variable optical filter 6, the second guide rails, fixes described low pass linear variable optical filter 8; Step motor 15,16, it connects with the first and second guide rails 13,14 respectively; And control part 17, its control step motor 15,16 makes the first guide rail 13 and the second guide rail 14 move horizontally perpendicular to light path, thereby makes high pass and low pass linear variable optical filter 6,8 move to the position of regulation.Control part 17 has storage part 18 and motor driving control circuit 19.And, control part 17 can be connected with computer controlled machine terminal 20, control part 17 transmission instructions by from computing machine to linear variable optical filter control system, thus the accurate movement that motor completes high pass linear variable optical filter 11 and low pass linear variable optical filter 12 controlled.
The following describes by this monochromator and obtain monochromatic process.First, in input optical fibre 1, send incident light, incident light is focused on high pass linear variable optical filter 6 through the first concentrating element 5, the light of the wavelength shorter than selected wavelength outputs in shortwave output optical fibre 4 through reflection direct-coupling, than focusing on low pass linear variable optical filter 8 through the second concentrating element 7 after the long light beam transmission of selected ripple, this long wavelength's light outputs in long wave output optical fibre 3 through reflection direct-coupling, after selected wavelength transmission, after optical reflection concentrating element group 9 reflect focalizations, again focus on the same linear optical filtering position of low pass linear variable optical filter 8, through the second concentrating element 7, focus on high pass linear variable optical filter 6 again, monochromatic light line focus after transmission is coupled on output optical fibre 2.
Fig. 3 is according to the structural drawing of the monochromator of a specific embodiment of the present invention.Monochromator in Fig. 3 comprises input optical fibre 21, arrowband monochromatic light output optical fibre 22, long wave output optical fibre 23, shortwave output optical fibre 24, optics achromatic convex lens 25,26,27,29,30,31 as concentrating element, high pass linear variable optical filter 32, low pass linear variable optical filter 33, optics corner cube mirror 28 and linear variable optical filter control system 34.Wherein optics corner cube mirror 28 and achromatic convex lens 27 are as optical reflection concentrating element group.
Below in conjunction with Fig. 3, illustrate and obtain the monochromatic light path traveling process in arrowband.First, high pass linear variable optical filter 32 and low pass linear variable optical filter 33 have been adjusted to the monochromatic position corresponding to required wavelength.Then, as shown in Figure 2, the incident light of input optical fibre 21 has an angle of divergence, make incident light through achromatic convex lens 25, and focus on the linear variable optical filter 32 of a high pass, in light beam, the composition of the wavelength shorter than selected wavelength is focused on and is coupled in shortwave output optical fibre 24 by achromatic convex lens 31 after 32 reflections of high pass linear variable optical filter.Then, light beam is through dispersing again after high pass linear variable optical filter 32, the light beam of dispersing is again through an achromatic convex lens 26, again light beam is focused on a low pass linear variable optical filter 33, after being reflected by low pass linear variable optical filter 33 than the composition of the long wavelength of selected ripple in light beam, then focus on and be coupled in long wave output optical fibre 23 by achromatic convex lens 30.Light beam by 33 transmissions of low pass linear variable optical filter is arrowband divergent beams with selected wavelength, this light beam is converged to directional light through an achromatic convex lens 27 and is reflected by corner cube mirror 28, light beam after reflection is parallel to achromatic convex lens 27 incidents, and focuses on low pass linear variable optical filter 33 former focal positions.This beams of narrow-band light again focuses on high pass linear variable optical filter 32 former focal positions by achromatic convex lens 26 again after low pass linear variable optical filter 33.Then, beams of narrow-band light is focused on and is coupled in shortwave output optical fibre 22 by an achromatic convex lens 29 after high pass linear variable optical filter 32.By several focused beam, to high and low logical linear variable optical filter 32,33, can greatly improve monochromatic contrast and resolution.
In the present embodiment, achromatic convex lens 25,26,27,29,30,31 not only, as focusing on original paper, can also be eliminated the aberration that light beam produces in during focusing.
Here it should be noted that, after the first installation of monochromator of the present invention, need to carry out monochromatic calibration operation, need required wavelength (gating wavelength) to debug one by one.
For example, as obtained the monochromatic light of 532nm by monochromator, need 532nm to calibrate, concrete trimming process is as follows.By linear variable optical filter control system 34, adjust high pass linear variable optical filter 32 positions and be roughly positioned at 532nm high pass, adjust low pass linear variable optical filter 33 positions and be roughly positioned at 532nm low pass, finely tune again two electric stepper motor and finely tune the position of linear variable filter, the pulsewidth of emergent light and power are met the requirements.After high and low logical linear variable optical filter 32,33 is adjusted to satisfactory position (assigned position), record the now positional information of motor, deposit storage part in, this positional information is corresponding 532nm monochromatic light.The incident light of other wavelength is carried out to same operation, and record the position of electro-motor, by the monochromatic light of the gating wavelength in the incident light of these wavelength of computer Linear Control.
After finishing, calibration can use monochromator of the present invention to obtain the monochromatic light that needs wavelength (gating wavelength).For example, incident light is that 400nm is to the continuous spectrum between 600nm, to therefrom select the green glow of 532nm, by software, select 532nm on computers, computing machine sends instruction to linear variable optical filter control system 34, and the control part in linear variable optical filter control system 34 is controlled the movement of motor by motor driving control circuit.Motor is connected with the second guide rail with the first guide rail, thereby correspondingly moves the first guide rail and the second guide rail.By mobile the first guide rail and the second guide rail, 532nm high pass is transferred to in high pass linear variable optical filter 32 positions, 532nm low pass is transferred in low pass linear variable optical filter 33 positions, thereby arrowband output optical fibre 22 is by the beams of narrow-band light of output 532nm, short wavelength's output optical fibre 23 is by the short wavelength's composition below output 532nm, and long wavelength's output optical fibre 24 is by long wavelength's composition more than output 532nm.
In the present embodiment, concentrating element has adopted achromatic convex lens, and those skilled in the art know, and off axis paraboloidal mirror and concave reflection etc. also can be realized the focusing to light beam, and also can not produce aberration, thereby the concentrating element in the present invention is not limited to above-mentioned embodiment.
In addition, in the present embodiment, incident beam first passes through low pass linear variable optical filter 33 again through high pass linear variable optical filter 32, those skilled in the art will recognize that and can certainly first through low pass linear variable optical filter 33, pass through high pass linear variable optical filter 32 again.
Advantage of the present invention is: directly adopt optical fiber interface, be convenient to light beam and enter, do not need to adjust; Filtering hot spot is little, and contrast is high, and resolution is high; Owing to adopting optical fiber output, the hot spot of output is circular, is convenient to again focus on; And the present invention has three output wave bands, can export respectively the selected monochromatic light of wavelength and the light at these monochromatic light two ends.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, all should belong to technology category of the present invention.
Claims (9)
1. a monochromator for full optical fiber IO interface, is characterized in that, comprising:
Input optical fibre, it inputs incident light;
High pass linear variable optical filter, its wavelength in reflecting the incident light is less than the shortwave light beam of selected wavelength;
Low pass linear variable optical filter, its wavelength in reflecting the incident light is greater than the long wave light beam of selected wavelength;
The first optical focus element, it is arranged in light path incident light is focused on;
The second optical focus element, it is arranged in light path the light beam by described high pass or low pass linear variable optical filter is focused on;
Optical reflection concentrating element group, it carries out reflect focalization to the light beam by described high pass and low pass linear variable optical filter;
Linear variable optical filter control system, the movement that it controls described high pass and low pass linear variable optical filter, filter to realize monochrome in the position that makes described linear variable optical filter be positioned at regulation; And
Arrowband monochromatic light output optical fibre, for exporting arrowband monochromatic light.
2. the monochromator of full optical fiber IO interface according to claim 1, is characterized in that, also comprises shortwave output optical fibre, and its reception is also exported the shortwave light beam of described high pass linear variable optical filter reflection.
3. the monochromator of full optical fiber IO interface according to claim 2, is characterized in that, also comprises long wave output optical fibre, and its reception is also exported the long wave light beam of described low pass linear variable optical filter reflection.
4. the monochromator of full optical fiber IO interface according to claim 3, is characterized in that, also comprises the 3rd focusing optic, and it focuses on and be coupled to described arrowband monochromatic light output optical fibre to described arrowband monochromatic light.
5. the monochromator of full optical fiber IO interface according to claim 3, is characterized in that, also comprises the 4th focusing optic, and it focuses on and be coupled to described shortwave output optical fibre to described shortwave light beam.
6. the monochromator of full optical fiber IO interface according to claim 3, is characterized in that, also comprises the 5th focusing optic, and it focuses on and be coupled to described long wave output optical fibre to described long wave light beam.
7. according to the monochromator of the full optical fiber IO interface described in any one in claim 4-6, it is characterized in that, described focusing optic comprises achromatic convex lens, off axis paraboloidal mirror and concave mirror.
8. the monochromator of full optical fiber IO interface according to claim 1, is characterized in that, described linear variable optical filter control system comprises:
The first guide rail moving horizontally perpendicular to optical path direction and the second guide rail, fix described high pass linear variable optical filter on described the first guide rail, fix described low pass linear variable optical filter on described the second guide rail,
Step motor, it is connected with described the first and second guide rails respectively;
Control part, it is controlled described step motor and moves described the first guide rail and the second guide rail, so that described high pass and low pass linear variable optical filter move to the position of regulation.
9. the monochromator of full optical fiber IO interface according to claim 8, is characterized in that, described linear variable optical filter control system also comprises: storage part, it stores the positional information of described high pass and low pass linear variable optical filter.
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| CN201310138671.XA CN104111112B (en) | 2013-04-19 | 2013-04-19 | A kind of monochromator of full optical fiber input/output interface |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08128899A (en) * | 1994-10-31 | 1996-05-21 | Satoshi Kawada | Spectro-image collecting device |
| JPH11304591A (en) * | 1998-04-22 | 1999-11-05 | Mitsubishi Electric Corp | Device for acquiring spectral image |
| CN203191076U (en) * | 2013-04-19 | 2013-09-11 | 华东师范大学 | Monochromator with all-fiber input/output interface |
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2013
- 2013-04-19 CN CN201310138671.XA patent/CN104111112B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08128899A (en) * | 1994-10-31 | 1996-05-21 | Satoshi Kawada | Spectro-image collecting device |
| JPH11304591A (en) * | 1998-04-22 | 1999-11-05 | Mitsubishi Electric Corp | Device for acquiring spectral image |
| CN203191076U (en) * | 2013-04-19 | 2013-09-11 | 华东师范大学 | Monochromator with all-fiber input/output interface |
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Effective date of registration: 20240429 Address after: 2209, 22nd Floor, Building B, Gonghe Feng Building, No. 1040 Meilong Avenue, Songhe Community, Longhua Street, Longhua District, Shenzhen City, Guangdong Province, 518110 Patentee after: Shenzhen Xuhong Technology Co.,Ltd. Country or region after: China Address before: No. 12, Denggao Road, Motou Town, Rugao City, Nantong City, Jiangsu Province 226500 Patentee before: Jiangsu Kunpeng Future Optical Co.,Ltd. Country or region before: China |