CN105510297A - Raman fluorescence spectrum testing system and optical signal collector thereof - Google Patents
Raman fluorescence spectrum testing system and optical signal collector thereof Download PDFInfo
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- CN105510297A CN105510297A CN201511006053.5A CN201511006053A CN105510297A CN 105510297 A CN105510297 A CN 105510297A CN 201511006053 A CN201511006053 A CN 201511006053A CN 105510297 A CN105510297 A CN 105510297A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
Abstract
The invention provides a Raman fluorescence spectrum testing system and an optical signal collector thereof. The Raman fluorescence spectrum testing system comprises a Raman fluorescence spectrophotometer (101) and the optical signal collector (102), wherein the optical signal collector is provided with a first focal point, a second focal point and a reflecting inner wall, a detected sample (103) is arranged at the first focal point of the optical signal collector, the optical receiving end (104) of the Raman fluorescence spectrophotometer is arranged at the second focal point of the optical signal collector, excitation light emergent from the emitting end of the Raman fluorescence spectrophotometer is focused and then is irradiated to the sample located at the first focal point of the optical signal collector, scattering fluorescence or Raman emitted by the sample is reflected by the inner wall of the optical signal collector and then is focused at the second focal point of the optical signal collector. The Raman fluorescence spectrum testing system can effectively improve the fluorescence or Raman optical signal collecting capacity.
Description
Technical field
The present invention relates to analysis and detecting instrument technical field, particularly relate to a kind of Raman fluorescence spectrum test macro and light signal gatherer thereof.
Background technology
Raman spectrum (Ramanspectra) is a kind of inelastic scattering spectrum.Raman spectrum analysis method is the Raman scattering effect found based on India scientist C.V. Raman (Raman), molecular vibration, rotation aspect information are obtained to scattering spectrum analyze different from incident light frequency, and is applied to a kind of analytical approach of molecular structure research.Illumination is mapped on material and elastic scattering and inelastic scattering occurs. and the scattered light of elastic scattering is the composition identical with excitation wavelength, and inelastically scattered scattered light has longer than excitation wavelength with short composition, is referred to as Ramam effect.
The appearance of laser instrument, provides high-quality high strength monochromatic light, has promoted research and the application thereof of Raman scattering effectively.The range of application of Raman spectrum, throughout every field such as chemistry, physics, biology and medical science, has very large value for pure qualitative analysis, height quantitative test and mensuration molecular structure.Raman spectrum can provide fast, simple, can repeat and the more important thing is undamaged qualitative and quantitative analysis, it is without the need to preparation of samples, and sample can directly by fibre-optical probe or by glass, quartz and optical fiber measurement.
It is belong to Detection of Weak Signals field that Raman spectrum detects.At present, when Raman spectrometer is used for Object Classification, the Raman scattering luminous energy of backward general 0.145 solid angle can only be collected, and total scattering luminous energy is 12.56 cube-corners be distributed in whole space, be equivalent to the useful signal energy that only have collected 1.15%, make the stronger difficult detection of natively very weak Raman signal.Therefore, the collection how strengthening effective light signal becomes the technical issues that need to address.
Summary of the invention
The present invention is intended to solve above-described problem.An object of the present invention is to provide any one a kind of Raman fluorescence spectrum test macro in a kind of overcoming the above problems and light signal gatherer thereof.Particularly, the invention provides Raman fluorescence spectrum test macro and light signal gatherer thereof, for strengthening the capacity gauge of fluorescence or Raman light signal.
According to a first aspect of the invention, a kind of Raman fluorescence spectrum test macro is provided, comprises Raman fluorescence spectrophotometer and light signal gatherer, wherein:
Described light signal gatherer has the first focus, the second focus and inner reflective wall, sample is placed in the first focus place of described light signal gatherer, the optical receiving end of Raman fluorescence spectrophotometer is placed in the second focus place of described light signal gatherer, be irradiated to the sample at the first focus place being positioned at described light signal gatherer after the exciting light of the transmitting terminal outgoing of Raman fluorescence spectrophotometer is focused, the scattering fluorescence that sample sends or Raman focus on the second focus place of described light signal gatherer after described light signal inner collector wall reflection.
The fiber port that the optical receiving end of described Raman fluorescence spectrophotometer is optical signal detector or is connected with optical signal detector.
Described light signal gatherer is complete ellipsoid or the part ellipsoidal with the first focus and the second focus and inner reflective wall.
Described Raman fluorescence spectrophotometer is used for the transmitting terminal of outgoing exciting light, described second focus place can be positioned at, also can be positioned at any position on described first focus and the second focus line, also can be positioned at, by optical fiber or optical lens, outgoing exciting light is directed to any position being irradiated to the sample surfaces being positioned at the first focus place.
The transmitting terminal of described Raman fluorescence spectrophotometer and receiving end are all positioned at the second focus place of light signal gatherer.
The receiving end of described Raman fluorescence spectrophotometer is placed in the second focus place described in light signal gatherer, and the transmitting terminal of described Raman fluorescence spectrophotometer to be placed on line that light signal gatherer is placed in described first focus and the second focus and between described first focus and the reflection cavity wall of light signal gatherer.The solid angle that the receiving end of described Raman fluorescence spectrophotometer is collected is 3.14.
Another aspect of the present invention, a kind of light signal gatherer is also provided, be built in the Raman fluorescence spectrum test macro comprising Raman fluorescence spectrophotometer, described light signal gatherer is direct or be connected with described Raman fluorescence spectrophotometer by optical fiber, described light signal gatherer has the first focus, the second focus and inner reflective wall
Described first focus for placing sample,
Described second focus is for the light transmitting terminal of the optical receiving end and described Raman fluorescence spectrophotometer of placing described Raman fluorescence spectrophotometer;
The exciting light of the transmitting terminal outgoing of Raman fluorescence spectrophotometer is by the defocused sample being irradiated to the first focus place being positioned at described light signal gatherer of segregation, and the scattering fluorescence that sample sends focuses on the second focus place of described light signal gatherer after described light signal inner collector wall reflection.
Described light signal gatherer is complete ellipsoid or the part ellipsoidal with the first focus and the second focus and inner reflective wall.Described first focus is the right focus of ellipsoid, and described second focus is the left focus of ellipsoid.
The invention provides Raman fluorescence spectrum test macro and light signal gatherer thereof, adopt a kind of ellipsoid shape light signal gatherer, can effectively expand collection solid angle, effectively can strengthen the capacity gauge of fluorescence or Raman light signal.
Read the following description for exemplary embodiment with reference to accompanying drawing, other property features of the present invention and advantage will become clear.
Accompanying drawing explanation
To be incorporated in instructions and the accompanying drawing forming a part for instructions shows embodiments of the invention, and together with the description for explaining principle of the present invention.In the drawings, similar Reference numeral is used for key element like representation class.Accompanying drawing in the following describes is some embodiments of the present invention, instead of whole embodiment.For those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can be obtained according to these accompanying drawings.
Fig. 1 schematically illustrates direct-coupled Raman fluorescence spectrum test macro;
Fig. 2 schematically illustrates the Raman fluorescence spectrum test macro of coupling fiber;
Fig. 3 schematically illustrates the Raman fluorescence spectrum test macro of another kind of coupling fiber.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
At present, general Raman fluorescence spectrophotometer can only collect the Raman scattering luminous energy of backward general 0.145 solid angle, and total scattering luminous energy is 12.56 cube-corners be distributed in whole space, be equivalent to the useful signal energy that only have collected 1.15%, make the stronger difficult detection of natively very weak Raman signal.Collect the little problem of solid angle to solve in above-mentioned Raman fluorescence spectral measuring, the present invention adopts a kind of ellipsoid shape light signal gatherer, can effectively expand collection solid angle.
Raman fluorescence spectrum test macro of the present invention, comprising: Raman fluorescence spectrophotometer and light signal gatherer, wherein:
Described light signal gatherer has inner reflective wall, sample is placed in the first focus place of described light signal gatherer, the optical receiving end of Raman fluorescence spectrophotometer is placed in the second focus place of described light signal gatherer, the sample at the first focus place being positioned at described light signal gatherer is irradiated to after the exciting light of Raman fluorescence spectrophotometer outgoing is focused, the scattering fluorescence that sample sends or Raman light focus on the second focus place of described light signal gatherer after described light signal inner collector wall reflection, the fiber port that the optical receiving end of described Raman fluorescence spectrophotometer is optical signal detector or is connected with optical signal detector.
Described Raman fluorescence spectrophotometer is used for the transmitting terminal of outgoing exciting light, described second focus place can be positioned at, also can be any position on described first focus and the second focus line, position preferably near the first focus but not between the first focus and the second focus, also can be positioned at and be directed to any position being irradiated to sample surfaces by optical fiber or optical lens.
Described light signal gatherer is complete ellipsoid or the part ellipsoidal with the first focus and the second focus and inner reflective wall.
Embodiment 1, direct-coupled Raman fluorescence spectrum test macro
As shown in Figure 1, Raman fluorescence spectrum test macro, comprise Raman spectrometer 101 and light signal gatherer 102, described light signal gatherer 102 is the ellipsoidal mirrors with the first focus (right focus) 103 and the second focus (left focus) 104, and testing sample is placed in described first focus 103 place.
The transmitting terminal of Raman spectrometer 101 and receiving end are all positioned at left focus 104 place of light signal gatherer 102 (ellipsoidal mirror), the sample place at right focus 103 place focusing on light signal gatherer 102 is divided according to the laser of optical principle outgoing, according to light path principle of reversibility, the Raman scattering fluorescence that sample surfaces ejects simultaneously is converged again burnt to left focus, collected by the receiving end of Raman spectrometer 101. now can collect the solid angle of 3.14, enhance 43.2 times than original capacity gauge.
Described light signal gatherer 102 can be a complete ellipsoidal mirror, Raman spectrometer is placed among this gatherer, or also can be incomplete ellipsoidal mirror, such as only include the ellipsoidal mirror of the first focus (right focus) 103 and the second focus (left focus) 104, the section of this spherical mirror is connected with Raman spectrometer is airtight as shown in Figure 1.
Embodiment 2, the Raman fluorescence spectrum test macro of coupling fiber
As shown in Figure 2, Raman fluorescence spectrum test macro, comprise Raman spectrometer 101 and light signal gatherer 102, described light signal gatherer 102 is the ellipsoidal mirrors with the first focus (right focus) 103 and the second focus (left focus) 104, and testing sample is placed in described first focus 103 place.
The fibre-optical probe be connected with the optical signal detector of Raman spectrometer 101 is placed in left focus 104 place of the ellipsoidal mirror of light signal gatherer 102 as receiving end, the fibre-optical probe be connected with the optical signal transmitter of Raman spectrometer 101 is placed in left focus 104 place of the ellipsoidal mirror of light signal gatherer 102 as transmitting terminal, divide according to the laser of optical principle outgoing on the sample at right focus 103 place focusing on light signal gatherer 102, reversible according to light path, the Raman scattering fluorescence simultaneously excited is converged again burnt to left focus 104, received by the optical fiber as receiving end, by reception optical fiber, light signal is passed to the optical signal detector of Raman spectrometer.Now can collect the solid angle of 3.14, also enhance 21.6 times than original capacity gauge.
Embodiment 3, the Raman fluorescence spectrum test macro of coupling fiber
As shown in Figure 3, Raman fluorescence spectrum test macro, comprise Raman spectrometer 101 and light signal gatherer 102, described light signal gatherer 102 is the ellipsoidal mirrors with the first focus (right focus) 103 and the second focus (left focus) 104, and testing sample is placed in described first focus 103 place.
The fibre-optical probe be connected with the optical signal detector of Raman spectrometer 101 is placed in left focus 104 place of the ellipsoidal mirror of light signal gatherer 102 as receiving end, the fibre-optical probe be connected with the optical signal transmitter of Raman spectrometer 101 is placed on the left focus 104 of the ellipsoidal mirror of light signal gatherer 102 and the line of right focus 103 as transmitting terminal, it is near the side of right focus 103 and the position not between left focus and right focus, according to the Laser Focusing of optical principle outgoing on the sample at right focus 103 place of light signal gatherer 102, according to optical principle, the Raman scattering fluorescence simultaneously excited focuses to left focus 104 after being reflected again, received by the optical fiber as receiving end, by reception optical fiber, light signal is passed to the optical signal detector of Raman spectrometer.Now can collect the solid angle of 3.14, also enhance 21.6 times than original capacity gauge.
Above-described content can combine enforcement individually or in every way, and these variant are all within protection scope of the present invention.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit.Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a Raman fluorescence spectrum test macro, is characterized in that, comprises Raman fluorescence spectrophotometer and light signal gatherer, wherein:
Described light signal gatherer has the first focus, the second focus and inner reflective wall, sample is placed in the first focus place of described light signal gatherer, the optical receiving end of Raman fluorescence spectrophotometer is placed in the second focus place of described light signal gatherer, be irradiated to the sample at the first focus place being positioned at described light signal gatherer after the exciting light of the transmitting terminal outgoing of Raman fluorescence spectrophotometer is focused, the scattering fluorescence that sample sends or Raman focus on the second focus place of described light signal gatherer after described light signal inner collector wall reflection.
2. Raman fluorescence spectrum test macro as claimed in claim 1, is characterized in that,
The fiber port that the optical receiving end of described Raman fluorescence spectrophotometer is optical signal detector or is connected with optical signal detector.
3. Raman fluorescence spectrum test macro as claimed in claim 1, is characterized in that,
Described light signal gatherer is complete ellipsoid or the part ellipsoidal with the first focus and the second focus and inner reflective wall.
4. Raman fluorescence spectrum test macro as claimed in claim 1, is characterized in that,
Described Raman fluorescence spectrophotometer is used for the transmitting terminal of outgoing exciting light, described second focus place can be positioned at, also can be positioned at any position on described first focus and the second focus line, also can be positioned at, by optical fiber or optical lens, outgoing exciting light is directed to any position being irradiated to the sample surfaces being positioned at the first focus place.
5. Raman fluorescence spectrum test macro as claimed in claim 1, is characterized in that,
The transmitting terminal of described Raman fluorescence spectrophotometer and receiving end are all positioned at the second focus place of light signal gatherer.
6. Raman fluorescence spectrum test macro as claimed in claim 1, is characterized in that,
The receiving end of described Raman fluorescence spectrophotometer is placed in the second focus place described in light signal gatherer, and the transmitting terminal of described Raman fluorescence spectrophotometer to be placed on line that light signal gatherer is placed in described first focus and the second focus and between described first focus and the reflection cavity wall of light signal gatherer.
7. Raman fluorescence spectrum test macro as claimed in claim 1, is characterized in that,
The solid angle that the receiving end of described Raman fluorescence spectrophotometer is collected is 3.14.
8. a light signal gatherer, it is characterized in that, be built in the Raman fluorescence spectrum test macro comprising Raman fluorescence spectrophotometer, described light signal gatherer is direct or be connected with described Raman fluorescence spectrophotometer by optical fiber, described light signal gatherer has the first focus, the second focus and inner reflective wall
Described first focus for placing sample,
Described second focus is for the light transmitting terminal of the optical receiving end and described Raman fluorescence spectrophotometer of placing described Raman fluorescence spectrophotometer;
The exciting light of the transmitting terminal outgoing of Raman fluorescence spectrophotometer is by the defocused sample being irradiated to the first focus place being positioned at described light signal gatherer of segregation, and the scattering fluorescence that sample sends focuses on the second focus place of described light signal gatherer after described light signal inner collector wall reflection.
9. light signal gatherer as claimed in claim 8, is characterized in that,
Described light signal gatherer is complete ellipsoid or the part ellipsoidal with the first focus and the second focus and inner reflective wall.
10. light signal gatherer as claimed in claim 9, is characterized in that,
Described first focus is the right focus of ellipsoid, and described second focus is the left focus of ellipsoid.
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| CN108072642A (en) * | 2016-11-11 | 2018-05-25 | 必达泰克知识产权公司 | For measuring the optic probe of Raman scattering and its measuring method |
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| CN114324272A (en) * | 2021-12-27 | 2022-04-12 | 兰州大学 | 4 pi solid angle ion beam fluorescence detection device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108072642A (en) * | 2016-11-11 | 2018-05-25 | 必达泰克知识产权公司 | For measuring the optic probe of Raman scattering and its measuring method |
| CN108072642B (en) * | 2016-11-11 | 2020-10-09 | 必达泰克知识产权公司 | Optical probe for measuring Raman scattering and measuring method thereof |
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| CN113624733A (en) * | 2021-06-25 | 2021-11-09 | 港湾之星健康生物(深圳)有限公司 | High-efficiency scattered light condensing assembly |
| CN114324272A (en) * | 2021-12-27 | 2022-04-12 | 兰州大学 | 4 pi solid angle ion beam fluorescence detection device and method |
| CN114324272B (en) * | 2021-12-27 | 2023-09-22 | 兰州大学 | Ion beam fluorescence detection device and method for 4 pi solid angle |
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Inventor after: Mou Taotao Inventor after: Zhong Hui Inventor after: Xiong Shengjun Inventor after: Zhao Xi Inventor after: Yuan Ding Inventor after: Xia Zheng Inventor before: Mou Taotao Inventor before: Xiong Shengjun Inventor before: Zhao Xi Inventor before: Yuan Ding Inventor before: Xia Zheng |
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Application publication date: 20160420 |