CN202649106U - Double-light-path spectroscopic detection system - Google Patents
Double-light-path spectroscopic detection system Download PDFInfo
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- CN202649106U CN202649106U CN 201220296899 CN201220296899U CN202649106U CN 202649106 U CN202649106 U CN 202649106U CN 201220296899 CN201220296899 CN 201220296899 CN 201220296899 U CN201220296899 U CN 201220296899U CN 202649106 U CN202649106 U CN 202649106U
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- light
- light source
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Abstract
The utility model discloses a double-light-path spectroscopic detection system. The system comprises an LED (light emitting diode) light source, a cuvette and a first receiver arranged behind the cuvette, wherein a dichroic mirror is arranged between the LED light source and the cuvette; and a second receiver is arranged on the reflective light path of the dichroic mirror. According to the double-light-path spectroscopic detection system disclosed by the utility model, in light emitted from the same light source, one beam reaches the first receiver via the half reflective semi-transparent mirror through the cuvette, while the other beam is reflected by the half reflective semi-transparent mirror to reach the second receiver, so that double photoelectric detection is formed, a data signal is synchronously collected and processed, and system errors, such as temperature drift, mains fluctuation and the like, can be well inhibited.
Description
Technical field
The utility model relates to field of spectral analysis technology, especially relates to a kind of spectrophotometer, particularly a kind of double light path spectral detection system.
Background technology
Spectrophotometric method is by measuring measured matter Optical Absorption degree in certain wave strong point or certain wavelength coverage, this material being carried out the method for qualitative and quantitative analysis.
In spectrophotometer, when different wave length is shone certain density sample solution continuously, just can obtain the corresponding absorption intensity of unusual wavelength.As take wavelength (λ) as horizontal ordinate, absorption intensity (A) is ordinate, just can draw the absorption spectrum curve of this material.Utilize this curve to carry out qualitative, the quantitative analytical approach of material, be called spectrophotometric method, be also referred to as absorption spectroscopy.Method with ultraviolet source mensuration colourless substance is called ultraviolet spectrophotometry; Method with visible light source mensuration coloring matter is called the visible light photometry.They are the same with colourimetry, all take the Beer-Lambert law as the basis.Above-mentioned ultraviolet region and visible region are commonly used.But the district that should use up of spectrophotometric method comprises ultraviolet region, visible region, infrared light district.
According to lambert (Lambert)-Bill (Beer) law: A=abc, when a beam intensity be the solution of monochromatic light vertical irradiation something of I0 after because a part of light absorbed by system, so the transmission light intensity is down to I, then the transmittance T of solution is:
A is absorbance in the formula, and b is solution layer thickness (cm), and c is the concentration (g/dm^3) of solution, and a is absorptivity.Wherein absorptivity is relevant with the factors such as person's character, temperature and wavelength of solution.Other components in the solution (such as solvent etc.) can be deducted with blank solution Optical Absorption.
By following formula as can be known, when fixed solution layer thickness l and absorptivity, the concentration of absorbance A and solution is linear.When quantitative test, at first need to measure solution to the absorbing state (absorption spectrum) of different wavelengths of light, therefrom determine maximum absorption wavelength, then take the light of this wavelength as light source, measure the absorbance A of a series of concentration known c solution, make A ~ c working curve.When analyzing unknown solution, according to the absorbance A of measuring, look into working curve and can determine corresponding concentration.This is the ultimate principle of metric measurement concentration.
The detecting instrument of existing employing spectrophotometric method, mostly adopt single light source list receiving light path, the advantage of this kind equipment is: principle is clear, light path is succinct, is classical pipeline analytic system, but this system to the inhibition of temperature drift, power-supply fluctuation equal error control ability a little less than.
Summary of the invention
Technical problem to be solved in the utility model is to overcome existing spectrophotometric instrument and has temperature drift, power-supply fluctuation equal error defective, and a kind of double light path spectral detection system that can overcome temperature drift, power-supply fluctuation equal error is provided.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of double light path spectral detection system, comprise led light source, colorimetric pool and place the first receiver after the described colorimetric pool, it is characterized in that, between described led light source and colorimetric pool, be provided with half anti-semi-permeable mirror, and be provided with the second receiver at the reflected light path of described half-reflecting half mirror.
Preferably, described half-reflecting half mirror and lED light source optical path are 45 degree angles.
Double light path spectral detection system of the present utility model: the light that same light source is launched, a branch of by half-reflecting half mirror, arrive the first receiver through colorimetric pool, another bundle is arrived the second receiver by the half-reflecting half mirror reflection, form two photodetections, the data-signal synchronous acquisition is processed.Half-reflecting half mirror becomes a branch of light source into the two-beam that luminous flux equates, along with the intensity variation of light source, this two-beam Strength Changes is consistent.It sees through light beam I
1
By reaction reagent as measurement light source I
1-1
, its folded light beam I
2
Do not pass through as a setting light value I of reagent
2-2
And reaction finishes, calculate solution reaction absorbance be A=LOG (I
1-1
/ I
2-2
).Because I
1
=I
2
So,, when temperature drift or power supply shakiness cause light source fluctuation, I
1-1
With I
2-2
Change in proportion, so absorbance A is constant.Thereby reach the impact that suppresses temperature drift and power-supply fluctuation.
The utility model has the advantages that:
Double light path spectral detection system of the present utility model: form two photodetections, the data-signal synchronous acquisition is processed, and can well suppress the systematic errors such as temperature drift, power-supply fluctuation.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the utility model double light path spectral detection system one structural representation.
Wherein, 1 is led light source, and 2 is colorimetric pool, and 3 is the first receiver, and 4 is the second receiver, and 5 is half-reflecting half mirror.
Embodiment
Embodiment:
Double light path spectral detection system structural representation of the present utility model comprises led light source as shown in Figure 1, colorimetric pool and place the first receiver after the described colorimetric pool, between described led light source and colorimetric pool, be provided with half anti-semi-permeable mirror, and the reflected light path at described half-reflecting half mirror is provided with the second receiver, and described half-reflecting half mirror and lED light source optical path are 45 degree angles.
The half-reflecting half mirror that uses in the utility model is common commercially available prod.
With the electro-optical system rectification of company's existing CODcr on-line monitoring instrument, by end, with the optical axis miter angle half anti-semi-permeable mirror is installed in original LED light source light path.Transmitted light arrives the first receiver through cuvette, and reflected light directly arrives the second receiver, mode and the computing method of change software reading out data, thus realize the more stable analysis to measure of instrument.
Certainly, above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow people can understand content of the present invention and implements according to this, can not limit protection scope of the present invention with this.The all Spirit Essence of main technical schemes is done according to the present invention equivalent transformation or modification all should be encompassed within protection scope of the present invention.
Claims (2)
1. double light path spectral detection system, comprise led light source, colorimetric pool and place the first receiver after the described colorimetric pool is characterized in that, between described led light source and colorimetric pool, be provided with half anti-semi-permeable mirror, and be provided with the second receiver at the reflected light path of described half-reflecting half mirror.
2. double light path spectral detection system according to claim 1 is characterized in that, described half-reflecting half mirror and lED light source optical path are 45 degree angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296899 CN202649106U (en) | 2012-06-25 | 2012-06-25 | Double-light-path spectroscopic detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296899 CN202649106U (en) | 2012-06-25 | 2012-06-25 | Double-light-path spectroscopic detection system |
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| Publication Number | Publication Date |
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| CN202649106U true CN202649106U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220296899 Expired - Lifetime CN202649106U (en) | 2012-06-25 | 2012-06-25 | Double-light-path spectroscopic detection system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914449A (en) * | 2012-09-17 | 2013-02-06 | 广州市怡文环境科技股份有限公司 | Double-light path colorimetric real-time sampling device |
| CN103528988A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Portable near-infrared analyzer |
| 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 |
| CN105806812A (en) * | 2016-03-16 | 2016-07-27 | 上海交通大学 | Rapid photoelectric type biological magnetic bead concentration detection method and system |
| CN106153549A (en) * | 2016-06-14 | 2016-11-23 | 暨南大学 | Capillary tube electrophoresis detector based on molecule absorption and detection method |
| CN107543800A (en) * | 2017-10-10 | 2018-01-05 | 安徽英凯环境技术有限公司 | A kind of Light Source Compensation update the system |
-
2012
- 2012-06-25 CN CN 201220296899 patent/CN202649106U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914449A (en) * | 2012-09-17 | 2013-02-06 | 广州市怡文环境科技股份有限公司 | Double-light path colorimetric real-time sampling device |
| CN103528988A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Portable near-infrared analyzer |
| 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 |
| CN105806812A (en) * | 2016-03-16 | 2016-07-27 | 上海交通大学 | Rapid photoelectric type biological magnetic bead concentration detection method and system |
| CN105806812B (en) * | 2016-03-16 | 2020-02-21 | 上海交通大学 | Photoelectric type rapid detection system and method for biomagnetic bead concentration |
| CN106153549A (en) * | 2016-06-14 | 2016-11-23 | 暨南大学 | Capillary tube electrophoresis detector based on molecule absorption and detection method |
| CN107543800A (en) * | 2017-10-10 | 2018-01-05 | 安徽英凯环境技术有限公司 | A kind of Light Source Compensation update the system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SUZHOU KETE ENVIRONMENTAL PROTECTION CO., LTD. Free format text: FORMER NAME: SUZHOU KETE ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 215156 Jiangsu city of Suzhou province Wuzhong District Xu Kou Zhen Mao Peng Lu, No. 517 Patentee after: SUZHOU KETE ENVIRONMENTAL PROTECTION Co.,Ltd. Address before: 215156 Jiangsu city of Suzhou province Wuzhong District Xu Kou Zhen Mao Peng Lu, No. 517 Patentee before: Suzhou Kete Environmental Protection Equipment Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
|
| CX01 | Expiry of patent term |