CN2348371Y - Accessories for solid and liquid absorption spectral measurement - Google Patents
Accessories for solid and liquid absorption spectral measurement Download PDFInfo
- Publication number
- CN2348371Y CN2348371Y CN 98212049 CN98212049U CN2348371Y CN 2348371 Y CN2348371 Y CN 2348371Y CN 98212049 CN98212049 CN 98212049 CN 98212049 U CN98212049 U CN 98212049U CN 2348371 Y CN2348371 Y CN 2348371Y
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- China
- Prior art keywords
- solid
- negative lens
- sample
- absorption
- slit
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- Expired - Fee Related
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Abstract
The utility model relates to an accessory for solid and liquid absorption spectral measurement, belonging to the improvement of a fluorescence spectrophotometer. An entrance optical stop (1) and a negative lens (2) which are used for being passed by emitted monochroic light and changing the exit monochroic light into parallel beam, a full reflecting prism (3) making beam turn 90DEG, an absorption pool (4) and an exit optical stop (5) which are arranged between the negative lens (2) and the entrance slit (S 2) are arranged between an exit slit (s 1) and an entrance slit (S 2). When nontransparent solid samples are measured, the utility model can be replaced by a solid sample frame (6) to carry out the measurement.
Description
The design belongs to the annex that optical measurement is used.
Generally, the absorption spectrum of material is measured by this dedicated optical spectrometer of spectrophotometer.It reflects fluid sample and absorption spectrum transparent, translucent solid sample by transmitted spectrum, but light absorption that can not the measurement for opaque solid sample.Fluorospectrophotometer is to measure the fluorescence spectrum of luminescent substance and the instrumentation of excitation spectrum, generally the excitation peak of luminous sample is with the absorption peak unanimity of this sample, before carrying out fluorescence spectral measuring for a unknown sample, at first to carry out the measurement of absorption spectrum, find out its excitation wavelength.This is that fluorescence spectrophotometer institute is inefficient.Fluorospectrophotometer could be transformed and make its function that can have absorbance spectrum, is a problem to be solved in the utility model.
The purpose of this utility model is the annex by particular design, form a kind of optical system, make fluorospectrophotometer enlarge function, can carry out measurement transparent, the translucent liquid absorption spectrum, also can carry out transparently, the absorption spectrum of opaque solid sample is measured.
Optically, a beam intensity is I
oLight beam when from air, inciding on the dielectric surface, send reflection, absorption, transmission, according to the energy conservation law, following formula is set up:
I
o=I
r+ I
a+ I
t(1) in the formula: I
rIntensity of reflected light, I
aAbsorbing light intensity, I
tTransmitted intensity
Lambert-Beer has provided solution absorbency
A=Lg(I
o/I
t)=Lg(1/T)……(2)
As light beam I
oTo decide the angle when inciding opaque solid surface, its transmitted light intensity I
t=0, (1) formula becomes:
I
o=I
r+I
a……(3)
(3) behind the formula normalizing, and definition reflectivity R=I
r/ I
o, its absorptivity
a=1-R……(4)
According to above principle, the architectural feature of the utility model fluorospectrophotometer annex is designed to go out as shown in Figure 1:
In the exit slit of fluorospectrophotometer excitation monochrometer and the sample cell grasping part between the entrance slit, be provided with confess penetrate monochromatic light by and make it to become negative lens (2) in the incident diaphragm (1) of parallel beam and the light path that coexists, make the total reflection prism (3) at 90 ° of angles of beam steering, absorption cell (4) between negative lens (2) and entrance slit and outgoing diaphragm (5); Total reflection prism (3) can be replaced by solid sample holder (6) when the test solid sample.
Cooperate the structural representation (1) and the index path (2) of the design's annex to describe using and operating of the design below, Fig. 1 also is a Figure of abstract.
Among the figure: 1, incident diaphragm 2, negative lens
3, total reflection prism 4, absorption cell
5, outgoing diaphragm 6, solid sample holder
By fluorospectrophotometer excitation monochrometer exit slit (S
1) monochromatic light of outgoing becomes parallel beam by diaphragm (1), negative lens (2), turn to 90 ° of angle directive fluorescence monochromator entrance slit (S through total reflection prism (3) again
2) on, between negative lens (2) and entrance slit, be provided with absorption cell (4) and diaphragm (5).When carrying out the absorption spectrum measurement of fluid sample, solvent is injected absorption cell (4), by excitation monochrometer, the synchronous scanning of fluorescence monochromator operation.Record light that the Xe lamp source sends transmitted spectrum T by solvent
j(λ), deposit among the File 1; Detected solution is changed in the absorption cell (4), adopt above-mentioned same measuring process, record the transmitted spectrum T of solution
y(λ), deposit with among the File 2, by data division arithmetic File 2/File 1, promptly obtain the transmitted spectrum T of solute, get spectrogram, its absorption spectrum is A=Lg (1/T).
When the measurement for opaque solid sample, from the sample cell fixture, take off absorption cell (4), record the spectrum R of Xe lamp source by the synchronous scanning operation
g(λ), deposit among the File 3, solid sample is packed in the sample chamber of solid sample holder (6), with (6) total reflection prism (3) is changed, by the reflectance spectrum R of synchronous scanning operational measure solid sample
Y(λ), deposit among the File 4, obtain the reflectance spectrum R of calibrated solid sample, its absorption spectrum a=1-R by data division arithmetic File 4/File 3.
Generally, fluorospectrophotometer is the fluorescence spectrum and the excitation spectrum of the luminous sample of energy measurement only, the design's annex has been installed after, enlarged function, had spectrophotometric performance.And 1 monochromator double light path optical system of general spectrophotometer employing, the absorption spectrum of measuring luminous solution exists distortion, and the design is a double monochromator monochromatic light road system, does not have problem of dtmf distortion DTMF.General in addition spectrophotometer can only be measured fluid sample, transparent, translucent solid sheet sample, and the design makes fluorospectrophotometer not only can measure fluid sample, the pressed powder of all right measurement for opaque, sheet sample.The beam steering device adopts right angle total reflection quartz prism, light loss little among the design, can realize measuring from the absorption spectrum of the above fluorescence Spectra scope of 250nm.
The design's a embodiment is as follows:
The bore of incident diaphragm (1) is 6mm, and the bore of outgoing diaphragm (5) is 8mm.
Total reflection prism (3) adopts JGS
2Quartz glass, α angle be 45 ° ± 1 ', solid sample holder sample chamber bore is 8mm.
Claims (1)
1, a kind of annex that is used for solid, liquid bulk absorption spectral measurement relates to the improvement to fluorospectrophotometer, it is characterized in that by fluorospectrophotometer excitation monochrometer exit slit (S
1) and entrance slit (S
2) between the sample cell grasping part in, be provided with to confess and penetrate monochromatic light and pass through, and make it to become the diaphragm (1) and the negative lens (2) of parallel beam, make the total reflection prism (3) at 90 ° of angles of beam steering, at negative lens (2) and entrance slit (S
2) total reflection prism (3) is when the test solid sample with absorption cell (4) and diaphragm (5) are arranged, available solid sample holder (6) is replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98212049 CN2348371Y (en) | 1998-03-31 | 1998-03-31 | Accessories for solid and liquid absorption spectral measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98212049 CN2348371Y (en) | 1998-03-31 | 1998-03-31 | Accessories for solid and liquid absorption spectral measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2348371Y true CN2348371Y (en) | 1999-11-10 |
Family
ID=33966499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98212049 Expired - Fee Related CN2348371Y (en) | 1998-03-31 | 1998-03-31 | Accessories for solid and liquid absorption spectral measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2348371Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706434B (en) * | 2009-09-04 | 2011-08-10 | 中国环境科学研究院 | Fluorophototmeter capable of detecting light absorption or light transmission |
| CN103278450A (en) * | 2013-05-24 | 2013-09-04 | 徐姗 | Sample room for analyzing liquid absorption spectrum |
| CN107576615A (en) * | 2017-09-25 | 2018-01-12 | 国家纳米科学中心 | A kind of measuring method and system of nano wire absorption spectra |
-
1998
- 1998-03-31 CN CN 98212049 patent/CN2348371Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706434B (en) * | 2009-09-04 | 2011-08-10 | 中国环境科学研究院 | Fluorophototmeter capable of detecting light absorption or light transmission |
| CN103278450A (en) * | 2013-05-24 | 2013-09-04 | 徐姗 | Sample room for analyzing liquid absorption spectrum |
| CN103278450B (en) * | 2013-05-24 | 2017-12-12 | 徐姗 | Sample room for liquid absorption spectrum analysis |
| CN107576615A (en) * | 2017-09-25 | 2018-01-12 | 国家纳米科学中心 | A kind of measuring method and system of nano wire absorption spectra |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| MM1K | Cease caused by non payment of annual fee |