CN103926000B - A kind of image spectrum sniffer - Google Patents
A kind of image spectrum sniffer Download PDFInfo
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- CN103926000B CN103926000B CN201410187794.7A CN201410187794A CN103926000B CN 103926000 B CN103926000 B CN 103926000B CN 201410187794 A CN201410187794 A CN 201410187794A CN 103926000 B CN103926000 B CN 103926000B
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- 230000003595 spectral effect Effects 0.000 abstract description 36
- 238000005259 measurement Methods 0.000 abstract description 21
- 238000010191 image analysis Methods 0.000 abstract description 2
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Abstract
The present invention discloses a kind of image spectrum sniffer, comprises imaging lens group, catoptron, imaging len, CCD camera, optical fiber, fiber spectrometer and video-stream processor; Catoptron and optical axis are sharp angle; Image signal incident forms incident optical signal by imaging lens group, reflexes to imaging len through catoptron, focuses in CCD camera, forms image information and shows at video-stream processor; The center of catoptron has the aperture suitable with bare fibre, and the bare fiber ends of optical fiber receives incident optical signal by aperture, and another termination fiber spectrometer, detecting light spectrum information, is presented at video-stream processor by spectrogram.Incident optical signal of the present invention is directly coupled to optical fiber, is transferred to fiber spectrometer and carries out spectral measurement, middle without the need to any reflecting medium, can detect the most real spectral signal.According to the technical parameter of current Commercial fibers spectrometer, spectral resolution can be brought up to Δ λ/λ=0.0001 order of magnitude by this image analysis system.
Description
Technical field
The present invention relates to spectrum of use, spectral imaging technology, microspectrum and image detection field, more specifically, relate to a kind of image spectrum sniffer.
Background technology
Spectrographic detection and analytical technology have contactless, undamaged advantage, and the indexs such as the physical arrangement of testee, chemical composition can be detected, be a kind of increasingly important research means in natural science.
Spectral assessment is based on a measurement, and image measurement is based on spatial character change, and both respectively have its relative merits.Therefore both are combined, produce light spectrum image-forming subject.Light spectrum image-forming data are mass data sources of collection of illustrative plates unification, and it contains image information and spectral information simultaneously, can provide the spectrum intensity data of each pixel on each wave band, and spectral resolution is higher.Spectral imaging technology can be divided three classes: multispectral imaging, high light spectrum image-forming and Hyper spectral Imaging technology, their spectral resolution exponentially increases.
As far back as the sixties in 20th century, scholar just proposes multi-optical spectrum imaging technology, but this technology can only simple detection visible ray and the several wave band of near infrared region, and spectral resolution only has Δ λ/λ=0.1 order of magnitude.The nineteen eighty-three U.S. develops jet propulsion laboratory First height imaging spectrometer (AIS-1), and its spectral resolution reaches Δ λ/λ=0.01 order of magnitude, and the domestic and international research to EO-1 hyperion afterwards reaches its maturity.TRW Ltd.'s development code name that the most outstanding hyperspectral imager first elects famous American is the hyperspectral imager of trwis-3, and its wavelength band is very wide, from 0.4um to 2.5um, has 384 continuous spectrum passages.But want to realize resolution and also need researchist further to make great efforts up to the hyperspectral imager of Δ λ/λ=0.001 magnitude.
Spectral imaging technology not only has spectrally resolved ability, also has image resolution ability, utilizes spectral imaging technology not only can carry out qualitative and quantitative analysis to examined object, and can also enter and position analysis to it.So spectral imaging technology is mainly used in remote sensing observations field, as carried out geology mineral identification charting research, vegetation ecological and military target identification etc.
But imaging spectral needs preservation, and data are very huge, and in a lot of practical application, we only need one-point measurement spectrum, do not need to carry out spectral measurement to each pixel in image, only need to carry out spectral measurement to one or several pixel regions interested of image, this is mainly reflected in the spectrum of use fields such as nanometer material science, cell biology, clinical medicine, slin emissivity.
Summary of the invention
In order to overcome the technical matters that existing light spectrum image-forming exists, the present invention proposes a kind of image spectrum sniffer, for carrying out spectral measurement analysis detection to one or several interested pixel region of image center location, adopt this measuring method can make up transmission spectra imaging technique all to need to carry out spectral measurement to whole pixel, cause the deficiency needing larger storage space and large data processing to bring.
In order to solve above-mentioned deficiency, technical scheme of the present invention is:
A kind of image spectrum sniffer, comprises imaging lens group, catoptron, imaging len, area array CCD camera, optical fiber, fiber spectrometer and video-stream processor;
Image signal incident forms incident optical signal by imaging lens group, and incident optical signal passes through the reflective surface of catoptron to imaging len, focuses in area array CCD camera, forms image information, and shows in video-stream processor;
Described catoptron and optical axis are a angle, 0 ° of < a < 90 °; And the center of catoptron has the aperture suitable with bare fibre, the bare fiber ends of optical fiber is connected with catoptron by aperture, another termination fiber spectrometer; Fiber spectrometer is connected with video-stream processor.
Optical axis refers to the center line of incident optical signal.Catoptron and optical axis have certain angle, thus incident optical signal passes through the reflective surface of catoptron to imaging len, focuses on area array CCD surface, forms image information.
Image signal incident forms incident optical signal by imaging lens group 1, and reflexes to imaging lens group by catoptron 2, focuses in area array CCD camera 4, forms image information, and shows in video-stream processor 8.
In addition in catoptron 2 center, its incident optical signal directly enters into optical fiber 6, and is transferred to fiber spectrometer 7, forms spectral information.
Cause fibercuts or translation to prevent from loosening, the bare fiber ends of optical fiber is fixed in the aperture of catoptron by naked fine adapter, and adopts fixture that naked fine adapter is pasted and fixed on the shady face of catoptron.The fibre core of bare fiber ends and covering insert in aperture through after bare fiber adaptor, and fiber end face and catoptron keep level and smooth.
The position of these six assemblies of imaging lens group, catoptron, imaging len, area array CCD camera, bare fiber adaptor and fixture thereof is relatively-stationary, and wires up with magazine.Shown in frame as empty in Fig. 1.To observe the spectral information of other positions, magazine can be moved point-of-interest is positioned in the middle of image.
Wherein video-stream processor is computing machine, and optical fiber is multimode optical fiber.
Compared with prior art, the beneficial effect of technical solution of the present invention is: incident optical signal of the present invention is coupled directly into into optical fiber, be transferred to fiber spectrometer and carry out spectral measurement, middle without the need to through any reflecting medium, can the most real spectral signal be detected.This device is when carrying out spectral measurement without the need to carrying out the scanning of spectrum dimension, and therefore structure is also more simple, and operation is more flexible, and cost also will significantly reduce.
Present invention achieves the object of image spectrum measuring and analysis, any one or multiple pixel in image can be carried out spectral measurement.Comparing with traditional spectral imaging technology, without the need to carrying out spectral measurement and storage to all pixels of image, thus improving measuring speed, simplied system structure.
The present invention can be equipped with any fiber spectrometer, thus realize wide spectral measurement, according to the technical parameter of current Commercial fibers spectrometer, spectral resolution can be brought up to Δ λ/λ=0.0001 order of magnitude by this image analysis system, compared with Hyper spectral Imaging technology, at least can improve an order of magnitude.The simultaneously wave band such as the optional covering ultraviolet light of spectral measurement ranges, visible ray, near infrared light, far red light.This system is without the need to carrying out the scanning of spectrum dimension, and therefore structure is also more simple, and operation is more flexible, and cost also will significantly reduce.
Accompanying drawing explanation
Fig. 1 is a kind of image spectrum sniffer schematic diagram provided by the invention.
Fig. 2 is the schematic diagram of mirror center hole, naked fine adapter and fixture.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
1-imaging lens group; 2-catoptron; 3-imaging len; 4-area array CCD camera; 5-optical fiber; 6-fiber spectrometer; 7-video-stream processor; The naked fine adapter of 8-; 9-fixture.
The present invention proposes image spectrum concept first, wants to merge by spectrographic detection and image detection, carries out spectral measurement to one or several pixel region of image center location.Compared with transmission spectra imaging, without the need to carrying out spectral measurement to all pixels of image, thus improve measuring speed, system architecture also will be more simple, and operation is more flexible, and cost also will significantly reduce.Fill up the blank in this field.
Incoming signal light of the present invention is coupled directly into into optical fiber, is transferred to fiber spectrometer and carries out spectral measurement, middle without the need to through any reflecting medium, can detect the most real spectral signal.
Provide the present invention's good embodiment according to Fig. 1 below, in order to system structure characteristic of the present invention to be described, realize the method for spectral measurement, instead of be used for limiting scope of the present invention.
As Fig. 1, a kind of image spectrum sniffer, comprises imaging lens group 1, catoptron 2, imaging len 3, area array CCD camera 4, optical fiber 5, fiber spectrometer 6, computing machine, naked fine adapter 8; Fixture 9;
Image signal incident forms incident optical signal by imaging lens group 1, and incident optical signal passes through the reflective surface of catoptron 2 to imaging len 3, focuses in area array CCD camera 4, forms image information, and shows on computers;
Described catoptron 2 and optical axis are a angle, 0 ° of < a < 90 °; And the center of catoptron 2 offers the aperture suitable with bare fibre, the bare fiber ends of optical fiber 5 is connected with catoptron 2 by aperture, another termination fiber spectrometer 6; Fiber spectrometer 6 is connected with computing machine.Fixture 9 can fix bare fiber adaptor 8, and is pasted catoptron 2 center shady face, prevents bare fiber adaptor 8 from loosening and causes fibercuts or displacement.The fibre core of optical fiber 5 and covering are through the aperture inserting catoptron 2 center after bare fiber adaptor 8, and fiber end face and catoptron 2 keep level and smooth.
In the present embodiment, employing resolution is the area array CCD camera of 1024 × 768,1/2 inch, and catoptron 2 is 70 ° with the angle of optical axis, and the diameter of the aperture that center is offered is 125um; Optical fiber 5 adopts multimode optical fiber, and internal diameter (fibre core) is 62.5 μm, and external diameter (covering) is 125 μm.Bare fiber adaptor 8 adopts SC type, and bore dia is 125um.Fixture 9 can fix bare fiber adaptor 8, and is pasted catoptron 2 center shady face, prevents bare fiber adaptor 8 from loosening and causes fibercuts or displacement.The fibre core of optical fiber 5 and covering insert in aperture through after bare fiber adaptor 8, and fiber end face and catoptron 2 keep level and smooth.
Meanwhile, the spectral measurement ranges of fiber spectrometer 6 is 200nm-1100nm, and optical resolution is 0.3nm, and integral time, 1ms was to being greater than 60s.
The image of Computer display area array CCD camera 4, and mark out point midway; Also carry out spectral measurement and spectrogram display for controlling fiber spectrometer 6 simultaneously.
The workflow of whole system is:
Image signal incident forms incident optical signal by imaging lens group 1, and reflexes to imaging lens group by catoptron 2, focuses in area array CCD camera 4, forms image information, and shows in a computer.
In addition in catoptron 2 center, its incident optical signal directly enters into optical fiber 5, and is transferred to fiber spectrometer 6, forms spectral information.
The position of imaging lens group 1, catoptron 2, imaging len 3, area array CCD camera 4, bare fiber adaptor 8 and these six assemblies of fixture 9 thereof is relatively-stationary, and wires up with magazine.To observe the spectral information of other positions, magazine can be moved point-of-interest is positioned in the middle of image.
Image spectrum of the present invention is without the need to carrying out the scanning of spectrum dimension, and make it faster than imaging spectral speed of detection, data volume is little, and spectral resolution is higher, if arrange in pairs or groups high-resolution spectrometer, so its spectral resolution can reach Δ λ/λ=0.0001 order of magnitude.And combine with the technological means such as pattern-recognition, image procossing, can automatically identify the position needing measure spectrum, realize the measurement of robotization, for on-line monitoring provides strong technical support.
The corresponding same or analogous parts of same or analogous label;
Describe in accompanying drawing position relationship for only for exemplary illustration, the restriction to this patent can not be interpreted as;
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (5)
1. an image spectrum sniffer, is characterized in that, comprises imaging lens group (1), catoptron (2), imaging len (3), area array CCD camera (4), optical fiber (5), fiber spectrometer (6) and video-stream processor (7);
Image signal incident forms incident optical signal by imaging lens group (1), reflexes to imaging len (3), focus in area array CCD camera (4) through catoptron (2), forms image information, and at video-stream processor display (7);
Described catoptron (2) and optical axis are a angle, 0 ° of < a < 90 °, and optical axis refers to the center line of incident optical signal; And the center of catoptron (2) has the aperture suitable with bare fibre, the bare fiber ends of optical fiber (5) is connected with catoptron (2) by aperture, and the bare fiber ends of optical fiber and catoptron keep smoothly, another termination fiber spectrometer (6); Fiber spectrometer (6) is connected with video-stream processor (7).
2. image spectrum sniffer according to claim 1, is characterized in that, the bare fiber ends of optical fiber (5) is fixed in the aperture of catoptron by naked fine adapter (8).
3. image spectrum sniffer according to claim 2, is characterized in that, described image spectrum sniffer also comprises the fixture (9) for naked fine adapter (8) being fixed on catoptron (2).
4. image spectrum sniffer according to claim 1, is characterized in that, described video-stream processor (7) is computing machine.
5. the image spectrum sniffer according to claim 3 or 4, is characterized in that, described optical fiber (5) is multimode optical fiber.
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| CN104121989B (en) * | 2014-07-18 | 2017-02-15 | 清华大学 | Multi-grating vacuum ultraviolet spectrometer |
| CN104597011B (en) * | 2014-12-31 | 2017-12-26 | 北京博晖创新光电技术股份有限公司 | Excitation light source drift correction device and XRF |
| CN105092030A (en) * | 2015-05-25 | 2015-11-25 | 中山大学 | Simple image spectrum detection apparatus |
| CN104990626A (en) * | 2015-07-01 | 2015-10-21 | 天津大学 | Snapshot type high-spectrum imaging system realizing image segmentation by use of optical fiber bundle |
| CN106198325A (en) * | 2016-06-27 | 2016-12-07 | 南开大学 | In a kind of on-line checking suspension molecule size distribution the measuring and analysis system of elastic scattering spectra dorsad and analyze method |
| CN106873577B (en) * | 2017-03-21 | 2019-04-05 | 中国科学院国家天文台南京天文光学技术研究所 | Method for diagnosing faults applied to South Pole large aperture telescope control system |
| CN108267445A (en) * | 2018-01-08 | 2018-07-10 | 上海理工大学 | Three-dimensional two-photon mating plate is micro- and spectrum multi-modal imaging device and method |
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| CN1697974A (en) * | 2001-12-11 | 2005-11-16 | 金伯利-克拉克环球有限公司 | Methods to view and analyze the results from diffraction-based diagnostics |
| CN1737515A (en) * | 2004-08-18 | 2006-02-22 | 深圳大学 | Method for realizing two dimensions space light spectrum distinguishing simultaneously and apparatus thereof |
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| JPS5717824A (en) * | 1980-07-07 | 1982-01-29 | Hitachi Ltd | Temperature measuring instrument for welded portion |
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| CN1697974A (en) * | 2001-12-11 | 2005-11-16 | 金伯利-克拉克环球有限公司 | Methods to view and analyze the results from diffraction-based diagnostics |
| CN1737515A (en) * | 2004-08-18 | 2006-02-22 | 深圳大学 | Method for realizing two dimensions space light spectrum distinguishing simultaneously and apparatus thereof |
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