CN101251419A - Pulse spectrograph capable of choosing wavelength - Google Patents
Pulse spectrograph capable of choosing wavelength Download PDFInfo
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- CN101251419A CN101251419A CNA2008100147778A CN200810014777A CN101251419A CN 101251419 A CN101251419 A CN 101251419A CN A2008100147778 A CNA2008100147778 A CN A2008100147778A CN 200810014777 A CN200810014777 A CN 200810014777A CN 101251419 A CN101251419 A CN 101251419A
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Abstract
The invention provides a spectrograph with optional specific wavelength specially for pulse type spectral measurement, which comprises a spectrograph and a plurality of optical-electrical converters, analog-digital conversion circuits and interface circuits. The invention is characterized in that: the spectrograph further comprises an optical input end face having a quadrilateral optical fiber bundle on the spectral imaging surface of the spectrograph, the other end of the optical fiber bundle is connected with a foraminate plate, and the optical-electrical converters are arranged on the other side of the plate corresponding to orifices; one end of the quadrilateral optical fiber bundle is closely arranged in the quadrilateral opening of an interface plate, the other end of the optical fiber bundle is in the opening form, and specific optical fibers undergoing wavelength selection are arranged in the orifices of the plate; the position corresponding to the other side of the plate where the orifices are arranged is aligned with the light-sensitive surfaces of the optical-electrical converters. The pulse spectrograph with optional wavelength provided by the invention is applicable to the measurement of the excitation spectrum of a pulsed light source or the measurement of a spectrum in quick change for site apparatuses, particularly to various laser radars, pulsed laser fluorescence measuring equipment and laser ranging equipment.
Description
Technical field
The present invention relates to a kind of pulse spectrograph capable of choosing wavelength, more specifically belong to a kind of spectrograph that can be used for the optional specific wavelength of impulse type spectral measurement.
Background technology
Spectral measurement has application more and more widely at present, particularly uses the spectrograph of pulse laser that user demand is widely arranged.Existing spectral measurement, following several method or the devices of adopting more:
1, adopt the spectrometer of traditional scan-type to measure.This measuring method is owing to used mechanical part to carry out spectral scan, and the therefore full spectral measurement cycle is longer, Measuring Time be several seconds to a few minutes.This measuring method has been used photomultiplier, and sensitivity is higher, and is also very accurate, but is not suitable for measuring the laser spectrum that changes spectrum faster or pulsed in time.
2, adopt the CCD linear array to carry out spectral measurement.The CCD linear array can be measured whole spectrum simultaneously, and spectral resolution is better, can adjust the time shutter flexibly, and equipment volume is little, and is low in energy consumption.Shortcoming is influenced by the speed of CCD device, can't carry out high speed and take the photograph spectrometry.
3, the spectral measurement of employing ICCD device.ICCD is a kind of image intensifying device, spectrum can be amplified, and sends into the video camera at rear portion and measures.Because technology limitation, the noise of ICCD is bigger, and dynamic range is lower, and measuring the pulse laser excitation spectrum has certain restriction.
Above equipment all has limitation, is difficult to adapt to pulse laser or other measurement of variation spectrum fast.
Summary of the invention
The purpose of this invention is to provide a kind of pulse spectrograph capable of choosing wavelength, be used to measure pulse laser excitation spectrum, fast-changing spectrum and need the low noise occasion of high sensitivity, to remedy the deficiency of prior art.
Therefore, the present invention includes spectrometer and a plurality of electrooptical device, analog to digital conversion circuit and interface circuit, it is characterized in that it also is included in spectrometer light spectrum image-forming face quadrilateral fibre bundle light input end face is installed, the other end of fibre bundle is connected with the plate that has aperture, and the position of another side aperture correspondence is equipped with electrooptical device on the plate.Quadrilateral fibre bundle, its fibre bundle one end closely are arranged in the four-sided openings on the interface board, and the fibre bundle other end is open shape, and the particular fiber of selecting through wavelength is installed in the aperture of plate.Stepped tight arrangement in the four-sided openings of optical fiber in interface board.Four-sided openings on the above-mentioned interface board, for parallelogram is arranged, on-right angle is arranged and is made each root optical fiber all different with other optical fiber position in the horizontal direction, makes that fibre bundle light input end face resolution in the horizontal direction is higher.Fibre bundle is the optical fiber end of an end of open shape, and the miniplug that has handle is installed, and can insert in the aperture of plate, and fibre bundle is the end of not using optical fiber in the aperture on the plate of not inserting of open shape one end, the unified inlet that is accommodated in light absorber.It is 0.01mm～1mm that optical fiber can be selected diameter for use, and on the plate diameter of aperture is greater than the used fibre diameter of fibre bundle, and difference is 0.01mm～0.5mm, and aperture has the depression of using for tackifier.The light-sensitive surface of electrooptical device is right against the another side of plate with respect to the optical fiber installed surface.Electrooptical device links to each other with outer computer with interface circuit by analog to digital conversion circuit, finishes the function of spectrograph.
Pulse spectrograph capable of choosing wavelength by the present invention's structure, its beneficial effect is to have solved existing spectrometer can't measure the pulsed light characteristic spectrum that some specific wavelengths are formed simultaneously, this spectrograph can be used for the measurement of the light-pulse generator excitation spectrum in the field instrumentation or changes the measurement of spectrum fast, is particularly useful for various laser radars, pulse laser fluorescence measurement equipment and Laser Distance Measuring Equipment etc.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1, general structure block diagram of the present invention
Fig. 2, optical fiber arrangements of the present invention position schematic perspective view
Fig. 3, optical fiber of the present invention is at imaging surface arrangement mode synoptic diagram
Wherein: 1. spectrometer, 2. interface board, 3. optical fiber, 4. plate, 5. electrooptical device, 6. light absorber is not 7. used optical fiber, 8. analog to digital conversion and interface circuit, 9. aperture, 10. handle, 11. depressions, 12. adhesives, 13. fibre bundles, 14. light input end faces
Embodiment
The purpose of this invention is to provide a kind of spectrograph that can be used for the optional specific wavelength of impulse type spectral measurement special use, to solve the technical matters of association area.Conventional spectrometers adopts the CCD linear array as photo-electric conversion element more, needs integral time, can't measure the pulsed light excitation spectrum.Traditional monochromatic light electricity multiplier tube scan-type spectrometer can't obtain the spectral information of some special spectrum wavelength of needs measurement simultaneously.
Embodiments of the invention as shown in Figure 1 and Figure 2, the present invention includes spectrometer (1) and a plurality of electrooptical device (5), analog to digital conversion circuit and interface circuit (8), it is characterized in that it also is included in spectrometer (1) light spectrum image-forming face quadrilateral fibre bundle (13) light input end face (14) is installed, the other end of fibre bundle (13) is connected with the plate (4) that has aperture (9), and the position of another side aperture correspondence is equipped with electrooptical device (5) on the plate.Electrooptical device (5) can adopt photomultiplier, avalanche photodide, and the array type of above two kinds of devices.
Quadrilateral fibre bundle (13), its fibre bundle (13) one ends closely are arranged in the four-sided openings on the interface board (2), and fibre bundle (13) other end is open shape, and the particular fiber of selecting through wavelength (3) is installed in the aperture (9) of plate (4).Stepped tight arrangement in the four-sided openings of optical fiber in interface board (2).Four-sided openings on the above-mentioned interface board (2), for parallelogram is arranged, on-right angle is arranged and is made each root optical fiber all different with other optical fiber position in the horizontal direction, makes that fibre bundle (13) light input end face (14) resolution in the horizontal direction is higher.Because the output of spectrometer is a banded light belt only, horizontal direction is the direction that optical wavelength changes, best arrangement mode is that the position difference of the horizontal direction between the every optical fiber is changeless, and the interior horizontal direction position difference of the horizontal direction position difference that the top optical fiber of each row is adjacent a row bottommost optical fiber and same row is consistent.Arrangement mode can be as shown in Figure 3.Four-sided openings on the interface board (2) also can constitute by rectangle, and the optical fiber of each row in the fibre bundle under this mode (13) all is in the same wavelength coverage at light input end face (14).
Fibre bundle (13) is optical fiber (3) end of an end of open shape, handle (10) is installed, can insert in the aperture (9) of plate (4), the not insertion plate (4) that fibre bundle (13) is open shape one end is gone up the end of not using optical fiber (7) in the aperture (9), the unified inlet that is accommodated in light absorber (6).The effect of light absorber (6) is a light trapping, and the light signal of usefulness is not absorbed fully, avoids reflection.Handle (10) guarantee optical fiber (3) insert aperture after insertion depth correct, and help using adhesive (12) to cave in bonding between (11) of optical fiber (3) and aperture (9).The characteristics of this structure are: fibre bundle is after light input end face (14) receives the spectrum of spectrometer (1), and the spectral information that each root optical fiber is transmitted in the fibre bundle (13) all is different, can select spectral measurement ranges flexibly according to the measurement demand.
It is 0.01mm～1mm that the optical fiber of forming fibre bundle (13) can be selected diameter for use, and plate (4) is gone up the diameter of aperture (9) greater than the used optical fiber of fibre bundle (13) (3) diameter, and difference is 0.01mm～0.5mm, and aperture (9) has the depression of using for tackifier (11).The light-sensitive surface of electrooptical device (5) is right against the another side of plate (4) with respect to optical fiber (3) installed surface.Electrooptical device (5) links to each other with outer computer with interface circuit (8) by analog to digital conversion circuit, with spectroscopic data storage or demonstration, finishes the function of spectrograph.
Said apparatus can be measured fast-changing spectrum and need the low noise spectrum of high sensitivity, and spectral wavelength can be selected flexibly by the optical fiber in the fibre bundle, is fit to this device universal in the pulse spectrum fields of measurement.
Claims (6)
1. pulse spectrograph capable of choosing wavelength, comprise spectrometer and a plurality of electrooptical device, analog to digital conversion circuit and interface circuit, it is characterized in that it also is included in the light input end face that spectrometer light spectrum image-forming face is equipped with the quadrilateral fibre bundle, the other end of fibre bundle is connected with the plate that has aperture, and the position of another side aperture correspondence is equipped with electrooptical device on the plate.
2. quadrilateral fibre bundle as claimed in claim 1, its fibre bundle one end closely are arranged in the four-sided openings on the interface board, and the fibre bundle other end is open shape, and the particular fiber of selecting through wavelength is installed in the aperture of plate.
3. stepped tight arrangement in the four-sided openings of optical fiber as claimed in claim 1 in interface board.Fibre bundle is the optical fiber end of an end of open shape, and the miniplug that has handle is installed, and can insert in the aperture of plate, and fibre bundle is the end of not using optical fiber in the aperture on the plate of not inserting of open shape one end, the unified inlet that is accommodated in light absorber.
4. it is 0.01mm～1mm that optical fiber as claimed in claim 1 can be selected diameter for use, and on the plate diameter of aperture is greater than the used fibre diameter of fibre bundle, and difference is 0.01mm～0.5mm, and aperture has the depression of using for tackifier.
5. the light-sensitive surface of electrooptical device as claimed in claim 1 is right against the another side of plate with respect to the optical fiber installed surface.Electrooptical device links to each other with outer computer with interface circuit by analog to digital conversion circuit, finishes the function of spectrograph.
6. the four-sided openings on the interface board as claimed in claim 2, for parallelogram is arranged, on-right angle is arranged and is made each root optical fiber all different with other optical fiber position in the horizontal direction, makes that fibre bundle resolution in the horizontal direction is higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100147778A CN101251419A (en) | 2008-03-21 | 2008-03-21 | Pulse spectrograph capable of choosing wavelength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100147778A CN101251419A (en) | 2008-03-21 | 2008-03-21 | Pulse spectrograph capable of choosing wavelength |
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| CN101251419A true CN101251419A (en) | 2008-08-27 |
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| CNA2008100147778A Pending CN101251419A (en) | 2008-03-21 | 2008-03-21 | Pulse spectrograph capable of choosing wavelength |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738618B (en) * | 2009-12-24 | 2012-07-04 | 武汉大学 | Multispectral earth observation laser radar system |
| CN102859338A (en) * | 2010-03-29 | 2013-01-02 | 因特瓦克公司 | Time Resolved Photoluminescence Imaging Systems And Methods For Photovoltaic Cell Inspection |
| CN106442325A (en) * | 2016-10-28 | 2017-02-22 | 中国地质大学（北京） | Two-dimensional fiber array spectrum detection system for plasma detection |
-
2008
- 2008-03-21 CN CNA2008100147778A patent/CN101251419A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738618B (en) * | 2009-12-24 | 2012-07-04 | 武汉大学 | Multispectral earth observation laser radar system |
| CN102859338A (en) * | 2010-03-29 | 2013-01-02 | 因特瓦克公司 | Time Resolved Photoluminescence Imaging Systems And Methods For Photovoltaic Cell Inspection |
| CN106442325A (en) * | 2016-10-28 | 2017-02-22 | 中国地质大学（北京） | Two-dimensional fiber array spectrum detection system for plasma detection |
| CN106442325B (en) * | 2016-10-28 | 2018-12-25 | 中国地质大学（北京） | A kind of 2-D optical fibre array spectral detection system for plasma detection |
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Application publication date: 20080827 |