CN105181602A - Spectral measurement device based on optics intergrating sphere - Google Patents
Spectral measurement device based on optics intergrating sphere Download PDFInfo
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- CN105181602A CN105181602A CN201510577864.4A CN201510577864A CN105181602A CN 105181602 A CN105181602 A CN 105181602A CN 201510577864 A CN201510577864 A CN 201510577864A CN 105181602 A CN105181602 A CN 105181602A
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Abstract
The invention provides a spectral measurement device based on an optics intergrating sphere. The spectral measurement device comprises a light source, an intergrating sphere sample chamber and a photoelectric sensing module, wherein the intergrating sphere sample chamber mainly comprises a lighting emitting transmitting substrate, a diffuse reflection layer, an incident diaphragm and an emergent diaphragm; the diffuse reflection layer is coated on the outer side of a spherical cavity comprising the lighting emitting transmitting substrate; an incident light path and an emergent light path are intersected on the same plane. Light entering the intergrating sphere is reflected for multiple times by the diffuse reflection layer, takes effect with a sample, and produces characteristic spectrums inside the intergrating sphere; after being reflected for multiple times by the diffuse reflection layer, the characteristic spectrums are overlapped in the position of the incident diaphragm and are received effectively; meanwhile, measurement error caused by the variation of light shape and divergence angle can be effectively restrained through the intergrating sphere. Experiment results show that the device can improve the sensitivity and stability of a traditional square or cylindrical sample chamber by 3 to 10 times in the condition of equal ray diameter.
Description
Technical field
The present invention relates to a kind of spectral measurement device based on optical integrating-sphere, be specially adapted to require very harsh spectrum test technical field to " sensitivity " and " detection limit ".
Background technology
The sample chamber of transmission spectra analytical instrument mostly adopts the structure of " square " or " cylindrical ", and defect is: the restriction 1. in structural design, and cause in sample chamber and only have the sample of logical light part and incident light to there occurs effect, characteristic spectrum generation efficiency is not high; 2. by the restriction of detector acceptance angle degree, only have few part can be detected device in the whole characteristic spectrums produced and receive, finally cause detection limit and sensitvity constraint.
In order to improve sensitivity, conventional way is by " increasing sample chamber wire diameter " or " arranging multiple reflections " to increase the light path of advancing of incident light, thus reaches the object expanding light action scope, improve sensitivity, reduce detection limit.Although these ways can increase the light path of advancing of incident light, but because the distance between " light incident side " to " optical receiving end " has also been extended, cause the subtle change of the subtle change of any end position in " light incident side " or " optical receiving end ", light shape and dispersion angle, the subtle change of light path of advancing all can cause larger measuring error, thus the stability that impact is measured (or repeatability), cause the improvement limitation of its sensitivity and detection limit.
In addition, because aforesaid way cannot allow all samples all participate in reaction, and only have few part can be detected device in the whole characteristic spectrums produced effectively to detect, therefore it is very limited to the improvement degree of sensitivity and detection limit.
Summary of the invention
The object of the invention is technical thought and the scheme for providing a kind of novelty based on the surveying instrument of spectral analysis, " square " or " cylindrical " sample chamber by transmission spectra analytical instrument is transformed into " integrating sphere " sample chamber:
1. diffuse reflector is coated in the outside of integrating sphere, and the inside of integrating sphere adopts quartz glass or chemical property other light transmissive materials extremely inactive, and the light propagation medium in integrating sphere chamber is sample to be tested.(be different from the formation of traditional quadrature ball, diffuse reflector is coated in the inside surface of integrating sphere, and the light propagation medium in integrating sphere chamber is air or vacuum.)
2. sample to be tested is full of whole integrating sphere chamber in integrating sphere, and characteristic spectrum to be observed produces in integrating sphere inside.(be different from the using method of traditional quadrature ball, its characteristic spectrum to be observed produces in integrating sphere outside, and the outside characteristic spectrum produced is directed in integrating sphere to be measured.)
Technical scheme of the present invention:
Based on a spectral measurement device for optical integrating-sphere, form primarily of light source 1, integrating sphere sample chamber 2 and photoelectric sensing module 3:
Wherein, integrating sphere sample chamber 2 is made up of light-transparent substrate 21, diffuse reflector 22, incident diaphragm 23, outgoing diaphragm 24 and injection port 25; Light-transparent substrate 21 forms the spherical chamber of integrating sphere sample chamber 2, is positioned at the inner side of integrating sphere sample chamber 2; Diffuse reflector 22 is coated in the outside of light-transparent substrate 21, is positioned at the outside of integrating sphere sample chamber 2; Light source 1 and incident diaphragm 23 form input path, and outgoing diaphragm 24 and photoelectric sensing module 3 form emitting light path, described input path and described emitting light path coplanar intersect;
The light that light source 1 is launched is incident in integrating sphere sample chamber 2 through incident diaphragm 23;
The light be incident in integrating sphere sample chamber 2 is diffusely reflected layer 22 multiple reflections and has an effect with sample, in integrating sphere sample chamber 2, produce characteristic spectrum; The characteristic spectrum produced, after the multiple reflections of diffuse reflector 22, superposes at outgoing diaphragm 24 place;
Characteristic spectrum after superposition is incident to photoelectric sensing module 3 through outgoing diaphragm 24; System is measured according to photoelectric sensing module 3 characteristic spectrum obtained and is analyzed sample.
Further, the characteristic spectrum that above-mentioned integrating sphere sample chamber 2 can be measured comprises absorption spectrum, fluorescence spectrum, Raman spectrum, Laser-induced Breakdown Spectroscopy, chemiluminescence, bioluminescence:
A monochromator is set up between light source 1 and incident diaphragm 23 or between outgoing diaphragm 24 and photoelectric sensing module 3, can absorbance spectrum;
Between light source 1 and incident diaphragm 23, between outgoing diaphragm 24 and photoelectric sensing module 3, set up a monochromator respectively, can fluorescence spectrum be measured;
When light source 1 is set as laser, between outgoing diaphragm 24 and photoelectric sensing module 3, set up a monochromator, Raman spectrum or Laser-induced Breakdown Spectroscopy can be measured;
When luminescent behavior is by the chemical reaction of sample or biological self behavior initiation, removes light source 1 and incident diaphragm 23, chemiluminescence or bioluminescence can be measured.
Further, the sample form that above-mentioned integrating sphere sample chamber 2 can be measured comprises liquid phase, gas phase and solid phase.
Further, the operation wavelength of above-mentioned light source 1 comprises ultraviolet, visible ray and infrared.
Further, the formation of above-mentioned integrating sphere sample chamber 2 comprises with under type:
Light-transparent substrate 21 adopts glass (comprising quartz glass) or chemical property other light transmissive materials extremely inactive, and diffuse reflector 22 is coated in the spherical containment portion that light-transparent substrate 21 is formed; Or light-transparent substrate 21 and diffuse reflector 22 unite two into one, material adopts teflon or stainless steel; Or in the gold-plated formation reflection horizon of the chamber inner wall of integrating sphere sample chamber 2.Wherein, light-transparent substrate 21 and diffuse reflector 22 unite two into one, and are namely interpreted as that integrating sphere sample chamber 2 only arranges the structural sheet (diffuse reflector 22) that one deck has a diffuse reflection function and forms its spherical cavity.
Further, above-mentioned input path and the angle of crossing formation coplanar between emitting light path are right angle or acute angle or obtuse angle.
Further, multiple incident diaphragm 23 or outgoing diaphragm 24 can be arranged in above-mentioned integrating sphere sample chamber 2, and ensure that light path that any two diaphragms are corresponding is not point-blank.
Further, on above-mentioned structure foundation, sampling, pre-service, auto injection and metering can be set up, automatically clean and automatically control, to form self-operated measuring unit.
Effect of the present invention:
1) light incided in integrating sphere sample chamber be diffusely reflected layer multiple reflections and and sample have an effect, improve the generation efficiency of characteristic spectrum.
2) characteristic spectrum produced superposes at outgoing diaphragm place and is detected device and effectively receives after the multiple reflections of diffuse reflector, improves the detection efficiency of characteristic spectrum.
3) measuring error that the feature of integrating sphere can also effectively suppress because the response difference of diverse location on light shape, dispersion angle and detector causes is utilized.
Under equal wire diameter condition, tradition can be improved 3-10 doubly based on the detection sensitivity of " square " or " cylindrical " sample chamber and Measurement sensibility by the present invention.
Accompanying drawing explanation
Fig. 1 is the basic comprising block diagram based on the spectral measurement device of optical integrating-sphere in the first preferred embodiment of the present invention;
Fig. 2 is the basic comprising schematic diagram of integrating sphere sample chamber in the first preferred embodiment of the present invention;
Fig. 3 is the integrating sphere sample chamber essential structure schematic diagram setting up a breather port;
Fig. 4 is the integrating sphere sample chamber essential structure schematic diagram having set up multiple outgoing diaphragm;
Fig. 5 is the basic comprising schematic diagram of the water quality on-line monitoring device based on optical integrating-sphere.
Drawing reference numeral illustrates:
1-light source; 2-integrating sphere sample chamber; 21-light-transparent substrate; 22-diffuse reflector; 23-incident diaphragm; 24-outgoing diaphragm; 25-injection port; 3-photoelectric sensing module.
Embodiment
Clearly understand that in order to make object of the present invention, technical scheme and advantage following examples are further elaborated to the present invention.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one
As shown in Figure 1 and Figure 2, a kind of spectral measurement device based on optical integrating-sphere, is formed primarily of light source 1, integrating sphere sample chamber 2 and photoelectric sensing module 3:
Wherein, integrating sphere sample chamber 2 is made up of light-transparent substrate 21, diffuse reflector 22, incident diaphragm 23, outgoing diaphragm 24 and injection port 25; Light-transparent substrate 21 forms the spherical chamber of integrating sphere sample chamber 2, is positioned at the inner side of integrating sphere sample chamber 2, and material adopts quartz glass; Diffuse reflector 22 is coated in the outside of spherical light-transparent substrate 21, is positioned at the outside of integrating sphere sample chamber 2; Light-transparent substrate 21 diffuse reflector 22 substrates and sample receiver double action; Light source 1 and incident diaphragm 23 form input path, and outgoing diaphragm 24 and photoelectric sensing module 3 form emitting light path, input path and emitting light path coplanar intersect;
The light that light source 1 is launched is incident in integrating sphere sample chamber 2 through incident diaphragm 23;
The light be incident in integrating sphere sample chamber 2 is diffusely reflected layer 22 multiple reflections and has an effect with sample, in integrating sphere sample chamber 2, produce characteristic spectrum; The characteristic spectrum produced, after the multiple reflections of diffuse reflector 22, superposes at outgoing diaphragm 24 place;
Characteristic spectrum after superposition is incident to photoelectric sensing module 3 through outgoing diaphragm 24; System is measured according to photoelectric sensing module 3 characteristic spectrum obtained and is analyzed sample.
Embodiment two
The present embodiment is substantially identical with embodiment one, and difference is:
When the mechanism of sample and incident light effect luminescence is absorption spectrum mechanism of production, between light source 1 and incident diaphragm 23 or between outgoing diaphragm 24 and photoelectric sensing module 3, set up a monochromator, now integrating sphere sample chamber 2 can absorbance spectrum;
When the mechanism of sample and incident light effect luminescence is fluorescence spectrum mechanism of production, between light source 1 and incident diaphragm 23, between outgoing diaphragm 24 and photoelectric sensing module 3, set up a monochromator respectively, now fluorescence spectrum can be measured in integrating sphere sample chamber 2;
When the mechanism of sample and incident light effect luminescence be Raman spectrum or Laser-induced Breakdown Spectroscopy mechanism of production time, light source 1 is set to laser, set up a monochromator between outgoing diaphragm 24 and photoelectric sensing module 3, now Raman spectrum or Laser-induced Breakdown Spectroscopy can be measured in integrating sphere sample chamber 2;
When luminescent behavior is by the chemical reaction of sample or biological self behavior initiation, light source 1 and incident diaphragm 33 are removed, and now chemiluminescence or bioluminescence can be measured in integrating sphere sample chamber 2.
Embodiment three
The present embodiment is substantially identical with embodiment one, and difference is: the structure of establishing a placement solid phase sample in integrating sphere sample chamber 2, can measure the characteristic spectrum that light and the effect of solid phase sample produce.
Embodiment four
The present embodiment is substantially identical with embodiment one, and difference is: light-transparent substrate 21 and diffuse reflector 22 unite two into one, and material adopts teflon or stainless steel; Teflon now or stainless steel play diffuse reflector 22 and sample receiver double action.
Embodiment five
The present embodiment is substantially identical with embodiment one, and difference is: a breather port has been set up in integrating sphere sample chamber 2, improves the convenience of cleaning integrating sphere internal chamber, can also be applied on self-operated measuring unit, as shown in Fig. 3, Fig. 5 simultaneously.
Embodiment six
The present embodiment is substantially identical with embodiment one, and difference is: the in an acute angle or obtuse angle of coplanar shape between input path and emitting light path.
Embodiment seven
The present embodiment is substantially identical with embodiment one, difference is: as shown in Figure 4, integrating sphere sample chamber 2 arranges an incident diaphragm 23 and four outgoing diaphragms 24, corresponding light source 1 selects continuous light source, it is four that photoelectric sensing module 3 is set up, set up the narrow band pass filter of a specific wavelength between each outgoing diaphragm 24 and photoelectric sensing module 3, then can measure the absorption spectrum of four groups of specific wavelengths simultaneously.
Embodiment eight
The present embodiment is substantially identical with embodiment one, difference is: on the basis of embodiment one, set up corresponding auto injection and metering, High-temperature Digestion, automatically cleaned, automatically controlled and after computing function, this device can carry out monitoring water quality on line, as shown in Figure 5.
More than show and describe essential structure of the present invention and ultimate principle, the technician of the industry should understand, and the present invention is not restricted to the described embodiments.Just essential structure of the present invention and the ultimate principle that describe in above-described embodiment and instructions; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the scope of protection of present invention.
Claims (8)
1. based on a spectral measurement device for optical integrating-sphere, it is characterized in that: described device is made up of light source (1), integrating sphere sample chamber (2) and photoelectric sensing module (3);
Wherein, integrating sphere sample chamber (2) are made up of light-transparent substrate (21), diffuse reflector (22), incident diaphragm (23), outgoing diaphragm (24) and injection port (25); Light-transparent substrate (21) forms the spherical chamber of integrating sphere sample chamber (2), is positioned at the inner side of integrating sphere sample chamber (2); Diffuse reflector (22) is coated in the outside of light-transparent substrate (21), is positioned at the outside of integrating sphere sample chamber (2); Light source (1) and incident diaphragm (23) form input path, and outgoing diaphragm (24) and photoelectric sensing module (3) form emitting light path, described input path and described emitting light path coplanar crossing;
The light that light source (1) is launched is incident in integrating sphere sample chamber (2) through incident diaphragm (23);
The light be incident in integrating sphere sample chamber (2) is diffusely reflected layer (22) multiple reflections and has an effect with sample, in integrating sphere sample chamber (2), produce characteristic spectrum; The characteristic spectrum produced, after the multiple reflections of diffuse reflector (22), superposes at outgoing diaphragm (24) place;
Characteristic spectrum after superposition is incident to photoelectric sensing module (3) through outgoing diaphragm (24); System is measured according to photoelectric sensing module (3) characteristic spectrum obtained and is analyzed sample.
2. the spectral measurement device based on optical integrating-sphere according to claim 1, is characterized in that: the characteristic spectrum that described integrating sphere sample chamber (2) can be measured comprises absorption spectrum, fluorescence spectrum, Raman spectrum, Laser-induced Breakdown Spectroscopy, chemiluminescence, bioluminescence.
3. the spectral measurement device based on optical integrating-sphere according to claim 1, is characterized in that: the sample form that described integrating sphere sample chamber (2) can be measured comprises liquid phase, gas phase and solid phase.
4. the spectral measurement device based on optical integrating-sphere according to claim 1, is characterized in that: the operation wavelength of described light source (1) comprises ultraviolet, visible ray and infrared.
5. the spectral measurement device based on optical integrating-sphere according to claim 1, it is characterized in that: the formation of described integrating sphere sample chamber (2) comprises with under type, light-transparent substrate (21) adopts glass, and diffuse reflector (22) is coated in the spherical containment portion that light-transparent substrate (21) is formed; Or light-transparent substrate (21) and diffuse reflector (22) unite two into one, material adopts or teflon or stainless steel; Or in the gold-plated formation reflection horizon of the chamber inner wall of integrating sphere sample chamber (2).
6. the spectral measurement device based on optical integrating-sphere according to claim 1, is characterized in that: between described input path with described emitting light path, the angle of coplanar crossing formation is right angle or acute angle or obtuse angle.
7. the spectral measurement device based on optical integrating-sphere according to claim 1, it is characterized in that: described integrating sphere sample chamber (2) can arrange multiple incident diaphragm (23) or outgoing diaphragm (24), and ensure that light path that any two diaphragms are corresponding is not point-blank.
8. the spectral measurement device based on optical integrating-sphere according to claim 1, is characterized in that: on described structure foundation, can set up sampling, pre-service, auto injection and metering, automatically cleans and automatically control, to form self-operated measuring unit.
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Cited By (8)
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| CN106872372A (en) * | 2017-03-17 | 2017-06-20 | 广西电网有限责任公司电力科学研究院 | A kind of constant-temperature integrating sphere device for gas analysis |
| CN108181674A (en) * | 2016-12-08 | 2018-06-19 | 高利通科技（深圳）有限公司 | A kind of general strong optical attenuator and its strong light spectral measurement system |
| CN109916814A (en) * | 2019-03-18 | 2019-06-21 | 上海交通大学 | For solid particle ermal physics/chemistry visualization and spectral measurement device and method |
| CN109946282A (en) * | 2019-04-18 | 2019-06-28 | 上海理工大学 | It is a kind of for measuring the measurement method of fluorescence membrane transmissivity or reflectance spectrum |
| CN110108648A (en) * | 2019-04-30 | 2019-08-09 | 深圳市太赫兹科技创新研究院有限公司 | A kind of discrimination method and identification system of dried orange peel |
| WO2021013774A1 (en) * | 2019-07-19 | 2021-01-28 | Sensirion Ag | Total organic carbon sensor |
| CN114076755A (en) * | 2020-08-21 | 2022-02-22 | 湖南省医疗器械检验检测所 | Controllable reference light source for chemiluminescence immunity analyzer |
| CN114509396A (en) * | 2022-04-20 | 2022-05-17 | 中国海洋大学 | Marine plankton luminescence measurement and recognition device |
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Cited By (14)
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|---|---|---|---|---|
| CN108181674A (en) * | 2016-12-08 | 2018-06-19 | 高利通科技（深圳）有限公司 | A kind of general strong optical attenuator and its strong light spectral measurement system |
| CN106872372A (en) * | 2017-03-17 | 2017-06-20 | 广西电网有限责任公司电力科学研究院 | A kind of constant-temperature integrating sphere device for gas analysis |
| CN106872372B (en) * | 2017-03-17 | 2023-11-17 | 广西电网有限责任公司电力科学研究院 | Constant temperature integrating sphere device for gas analysis |
| CN109916814A (en) * | 2019-03-18 | 2019-06-21 | 上海交通大学 | For solid particle ermal physics/chemistry visualization and spectral measurement device and method |
| CN109946282B (en) * | 2019-04-18 | 2021-09-07 | 上海理工大学 | Measuring method for measuring transmittance or reflectance spectrum of fluorescent film |
| CN109946282A (en) * | 2019-04-18 | 2019-06-28 | 上海理工大学 | It is a kind of for measuring the measurement method of fluorescence membrane transmissivity or reflectance spectrum |
| CN110108648A (en) * | 2019-04-30 | 2019-08-09 | 深圳市太赫兹科技创新研究院有限公司 | A kind of discrimination method and identification system of dried orange peel |
| CN110108648B (en) * | 2019-04-30 | 2022-01-14 | 深圳市太赫兹科技创新研究院有限公司 | Method and system for identifying dried orange peel |
| WO2021013774A1 (en) * | 2019-07-19 | 2021-01-28 | Sensirion Ag | Total organic carbon sensor |
| US11953486B2 (en) | 2019-07-19 | 2024-04-09 | Sensirion Ag | Total organic carbon sensor utilizing down conversion |
| CN114076755A (en) * | 2020-08-21 | 2022-02-22 | 湖南省医疗器械检验检测所 | Controllable reference light source for chemiluminescence immunity analyzer |
| CN114076755B (en) * | 2020-08-21 | 2024-03-12 | 湖南省医疗器械检验检测所 | Adjustable reference light source for chemiluminescent immunoassay analyzer |
| CN114509396A (en) * | 2022-04-20 | 2022-05-17 | 中国海洋大学 | Marine plankton luminescence measurement and recognition device |
| CN114509396B (en) * | 2022-04-20 | 2022-07-29 | 中国海洋大学 | Marine plankton luminescence measurement and recognition device |
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