CN103528970A - Light path system in portable near-infrared analyzer - Google Patents
Light path system in portable near-infrared analyzer Download PDFInfo
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- CN103528970A CN103528970A CN201310498540.2A CN201310498540A CN103528970A CN 103528970 A CN103528970 A CN 103528970A CN 201310498540 A CN201310498540 A CN 201310498540A CN 103528970 A CN103528970 A CN 103528970A
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Abstract
The invention relates to a light path system in a near-infrared analyzer, relating to the field of light path system designs. The problems that the structure is fragile, long-time preheating is needed, real-time measurement cannot be achieved in the prior art are solved. The light path system comprises a light emitting diode (LED) light source group, a spectroscope for resolving the narrow band light of the LED light source group into reflected light and incident light, a sample room for receiving transmission light from the spectroscope, a transmission light detector for receiving spectrum weak signals carrying sample information from the sample room and a reflected light detector for receiving the reflected light from the spectroscope. According to the light path system, the LED light source group is adopted, heat dissipation is little, long-time preheating is not needed, better monochromaticity is realized, and the requirement on a subsequent monochrome system is simplified. More accurate real-time spectrum detecting data is extracted through comparison and elimination, the interference for the detection result caused by objective factors such as measurement conditions and environment temperature is excluded, and measurement of a background spectrum and correction of a baseline spectrum are omitted. The light path system is light in structure and low in power consumption.
Description
Technical field
The present invention relates to light path system design field, be specifically related to the light path system in a kind of Portable near infrared analyser.
Background technology
At present, the light-source system of near infrared spectrometer analyzer generally adopts Halogen lamp LED list light path system, the intensity of light source is large, energy stabilization, but its structure is more fragile, before use, need long-time preheating just can reach stability requirement, be not suitable for frequently carrying and jolting, before each measurement, all to carry out in addition base measurement and background spectrum correction, give in real time and measure and caused obstacle.
Summary of the invention
In order to solve the light-source system of existing near infrared spectrometer analyzer, adopt the fragile structure of Halogen lamp LED list light path system existence, the problem that needs long-time preheating, cannot measure in real time, the invention provides the light path system in a kind of Portable near infrared analyser.
The present invention is that the technical scheme that adopts of technical solution problem is as follows:
Light path system in Portable near infrared analyser, by LED light source group, for the narrow band of light of LED light source group being resolved into the spectroscope of reflected light and incident light, for receiving sample chamber from spectroscopical transmitted light, for receiving from the transmitted light detector of the spectrum weak signal of carrying sample message of sample chamber and forming from spectroscopical catoptrical reflection light detector for receiving;
Open in turn a plurality of LED lamps in LED light source group, the narrow band of light that spectroscope reception LED lamp sends is also broken down into reflected light and transmitted light, and reflection light detector receives reflected light and the light signal receiving is converted to weak electric signal and passes to other devices in analyser; Transmitted light is incident on sample chamber, and transmitted light detector receives near infrared light comprehensively and sample carried out to the spectrum weak signal of carrying sample message after transmission, and the spectrum weak signal receiving is converted to electrical signal transfer to other devices in analyser.
Described LED light source group adopts four centre wavelengths to be respectively the LED lamp parallel connection of 930nm, 950nm, 970nm, 990nm.
Described transmitted light detector and reflection light detector all adopt silicon detector.
The invention has the beneficial effects as follows:
The present invention adopts the illumination of LED light source group, dispels the heat less and does not need long-time preheating, compared to Halogen lamp LED, has better monochromaticity, has greatly simplified the requirement to follow-up monochromatic system; The same light beam of LED light source group outgoing resolves into transmitted light and reflected light by spectroscope, a part is carried a large amount of sample informations after irradiating sample, the light beam that does not contain sample message with another part imports the signal processing system of analyser into simultaneously, by contrast, eliminate and extract the data of real time spectrum detection more accurately, got rid of measuring condition, the interference of the objective factors such as environment temperature to testing result, has save the calibration step to the measurement of background spectrum and baseline spectrum in traditional structure.
The present invention has the little feature of the light power consumption of structure simultaneously, and LED light spectrum wavelength band is narrower, and the requirement of subsequent optical path monochromatic system is reduced greatly, has greatly simplified structure and the volume of analyser.
Accompanying drawing explanation
Fig. 1 is the structural representation of the light path system in Portable near infrared analyser of the present invention.
In figure: 1, LED light source group, 2, spectroscope, 3, sample chamber, 4, transmitted light detector, 5, reflection light detector.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, light path system in Portable near infrared analyser of the present invention, by LED light source group 1, spectroscope 2, sample chamber 3, transmitted light detector 4 and reflection light detector 5 form, spectroscope 2 is placed on the position between LED light source group 1 and sample chamber 3, spectroscope 2 is for resolving into reflected light and incident light by the narrow band of light of LED light source group 1, reflection light detector 5 is for receiving the reflected light from spectroscope 2, sample chamber 3 is for receiving the transmitted light from spectroscope 2, transmitted light detector 4 arranges near sample chamber 3, transmitted light detector 4 is for receiving the spectrum weak signal of carrying sample message from sample chamber 3.
In present embodiment, LED light source group 1 adopts four LED lamps in parallel, the center wave band scope of LED light source group 1 is 930nm～990nm, the model of four LED lamps is different, their centre wavelength is respectively 930nm, 950nm, 970nm, 990nm, the light that these four LED lamps send is narrow band of light.
The present invention draws spectroscopic data after adopting LED light source group 1 to filter by follow-up monochromatic light path system, and LED light source group 1 has the features such as simple in structure, low in energy consumption, is applicable to portable design.
In present embodiment, transmitted light detector 4 and reflection light detector 5 all adopt silicon detector, have low price, a feature such as volume is little, signal to noise ratio (S/N ratio) is high and heat affecting is little.
Light path system of the present invention is in being specifically applied to Portable near infrared analyser time, open in turn four LED lamps in LED light source group 1, these four LED lamps all send narrow band of light, narrow band of light is incident on spectroscope 2, monochromatic light is resolved into reflected light and transmitted light by spectroscope 2, reflected light receives by reflection light detector 5, and reflection light detector 5 is converted to by the light signal receiving amplifier or other devices that weak electric signal passes in Portable near infrared analyser and is for further processing; Transmitted light is incident on sample chamber 3, transmitted light detector 4 arranges near sample chamber 3, transmitted light detector 4 receives near infrared light comprehensively and sample is carried out to the spectrum weak signal of carrying sample message after transmission, transmitted light detector 4 changes the spectrum weak signal receiving into electrical signal transfer and is for further processing to the amplifier in Portable near infrared analyser or other devices, by other devices in Portable near infrared analyser, realizes the qualitative analysis of sample composition and measurement.
Claims (3)
1. the light path system in Portable near infrared analyser, it is characterized in that, by LED light source group (1), for the narrow band of light of LED light source group (1) being resolved into the spectroscope (2) of reflected light and incident light, for receiving sample chamber (3) from the transmitted light of spectroscope (2), for receiving from the transmitted light detector (4) of the spectrum weak signal of carrying sample message of sample chamber (3) and forming for the catoptrical reflection light detector (5) receiving from spectroscope (2);
Open in turn a plurality of LED lamps in LED light source group (1), the narrow band of light that spectroscope (2) reception LED lamp sends is also broken down into reflected light and transmitted light, and reflection light detector (5) receives reflected light and the light signal receiving is converted to weak electric signal and passes to other devices in analyser; Transmitted light is incident on sample chamber (3), transmitted light detector (4) receives near infrared light comprehensively and sample is carried out to the spectrum weak signal of carrying sample message after transmission, and the spectrum weak signal receiving is converted to electrical signal transfer to other devices in analyser.
2. the light path system in Portable near infrared analyser according to claim 1, is characterized in that, described LED light source group (1) adopts four centre wavelengths to be respectively the LED lamp parallel connection of 930nm, 950nm, 970nm, 990nm.
3. the light path system in Portable near infrared analyser according to claim 1, is characterized in that, described transmitted light detector (4) and reflection light detector (5) all adopt silicon detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310498540.2A CN103528970A (en) | 2013-10-22 | 2013-10-22 | Light path system in portable near-infrared analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310498540.2A CN103528970A (en) | 2013-10-22 | 2013-10-22 | Light path system in portable near-infrared analyzer |
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| CN103528970A true CN103528970A (en) | 2014-01-22 |
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| CN201310498540.2A Pending CN103528970A (en) | 2013-10-22 | 2013-10-22 | Light path system in portable near-infrared analyzer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850544A (en) * | 2015-08-03 | 2018-03-27 | 菲尔德水检测有限责任公司 | Equipment, system and method for water pollutant test |
| CN108828770A (en) * | 2018-06-05 | 2018-11-16 | 广东欧谱曼迪科技有限公司 | A kind of bias light removing method and system suitable near infrared imaging |
| CN110997147A (en) * | 2017-07-14 | 2020-04-10 | 迈恩医疗解决方案有限公司 | Automated analyzer and method for performing chemical, biochemical and/or immunochemical analyses |
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| CN110997147A (en) * | 2017-07-14 | 2020-04-10 | 迈恩医疗解决方案有限公司 | Automated analyzer and method for performing chemical, biochemical and/or immunochemical analyses |
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Application publication date: 20140122 |