CN203561582U - Optical path system in portable type near-infrared analyzer - Google Patents
Optical path system in portable type near-infrared analyzer Download PDFInfo
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- CN203561582U CN203561582U CN201320652332.9U CN201320652332U CN203561582U CN 203561582 U CN203561582 U CN 203561582U CN 201320652332 U CN201320652332 U CN 201320652332U CN 203561582 U CN203561582 U CN 203561582U
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Abstract
The utility model provides an optical path system in a portable type near-infrared analyzer, relates to the field of designs of optical path systems, and solves the problems in the prior art that the structure is fragile, the time for pre-heating is long and real-time measurement cannot be carried in real time. The optical path system is composed of an LED (Light Emitting Diode) light source set, a spectroscope which is used for decomposing narrow waveband light of the LED light source set into reflection light and incident light, a sample room for receiving transmitting light from the spectroscope, a transmitting light detector which is used for receiving a spectrum weak signal obtained from the sample room and carrying sample information, and a reflection light detector which is used for receiving the reflection light from the spectroscope. According to the optical path system in the portable type near-infrared analyzer, the LED light source set is adopted, heat radiation is less and the time for pre-heating is not long; the optical path system has good monochromaticity and the requirements on a follow-up monochromic system are simplified; more accurate real-time spectrum detection data is extracted by comparison elimination, and interferences on a detection result by objective factors including measurement conditions, environment temperatures and the like are removed; the measurement of a backlight spectrum and the correction of a base line spectrum are saved; the structure is portable and the power consumption is small.
Description
Technical field
The utility model relates to light path system design field, is 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.
Utility model content
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 utility model provides the light path system in a kind of Portable near infrared analyser.
The utility model 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 beneficial effects of the utility model are: the utility model 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 utility model 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 utility model.
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 utility model is described in further detail.
As shown in Figure 1, light path system in Portable near infrared analyser of the present utility model, 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 utility model 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 utility model 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 |
|---|---|---|---|
| CN201320652332.9U CN203561582U (en) | 2013-10-22 | 2013-10-22 | Optical path system in portable type near-infrared analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652332.9U CN203561582U (en) | 2013-10-22 | 2013-10-22 | Optical path system in portable type near-infrared analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561582U true CN203561582U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320652332.9U Expired - Fee Related CN203561582U (en) | 2013-10-22 | 2013-10-22 | Optical path system in portable type near-infrared analyzer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528970A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Light path system in portable near-infrared analyzer |
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2013
- 2013-10-22 CN CN201320652332.9U patent/CN203561582U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528970A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Light path system in portable near-infrared analyzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20161022 |