CN201697871U - High-concentration visible spectrophotometer - Google Patents
High-concentration visible spectrophotometer Download PDFInfo
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- CN201697871U CN201697871U CN2009202093999U CN200920209399U CN201697871U CN 201697871 U CN201697871 U CN 201697871U CN 2009202093999 U CN2009202093999 U CN 2009202093999U CN 200920209399 U CN200920209399 U CN 200920209399U CN 201697871 U CN201697871 U CN 201697871U
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- monochromator
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- optical filter
- visible spectrophotometer
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Abstract
The utility model belongs to the optical analysis instrument, disclosing a high-concentration visible spectrophotometer. The absorbency of the existing visible spectrophotometer is 3A and greater error of measurement precision near 3A is existed; the existing instrument can not provide precise detection when the detection result is 0.05-0.2 percent T. In the utility model, a filter (5) is arranged between a monochromator (4) and a sample absorption cell (6); the wave length of the filter (5) is 325-1000nm, the bandwidth is 12nm, the SNR is one per thousand and the transmittance is equal to or more than 50 percent T. The utility model has the advantages of convenient operation, high sample detection precision, simple structure and low cost.
Description
Technical field
The utility model belongs to optic analytical instrument, specifically a kind of high concentration visible spectrophotometer.
Background technology
Spectrophotometer is that a branch of complex light is passed through beam splitting system, is divided into the monochromatic light of a series of wavelength, chooses the light of a certain wavelength, the absorption power of light is carried out the determination and analysis of material according to measured matter.Be mainly used in to solid, powder, and chemistry, the physical property of samples such as graininess, coating do qualitative, quantitative test.Spectrophotometer all has a wide range of applications in every field such as agricultural product, food, health, medicine, chemical industry, people's lives.Be modern industry, agricultural, the indispensable analytical instrument of scientific research.Spectrophotometer basic structure is made up of following five parts: light source, monochromator, absorption of sample pond, pick-up unit and signal indicating device.The effect of monochromator is that the mixed light from light source is decomposed into monochromatic light, and the light of required wavelength is provided, and is spectrophotometric key element.
The parasitic light index is spectrophotometric important technology index, is the important evidence of spectrophotometer accuracy of detection.Parasitic light mainly causes owing to spectrophotometric multiple order spectrum.The absorbance of the domestic visible spectrophotometer of prior art is 3A, and the measuring accuracy deviation ratio is bigger near 3A.Existing equipment can't accurately detect when testing result was 0.05-0.2%T.Existing international state-of-the-art spectrophotometric absorbance is 6A, and the index that can detect is 1/1000000 grade, and detected value is 0.0001%T.Its principle is to use 2 grades of beam split of 2 monochromators, and veiling glare is reduced.This spectrophotometric shortcoming is a complex structure, the cost height, and price is expensive.Therefore invent that a kind of parasitic light index is low, accuracy of detection is high, it is simple in structure to possess again simultaneously, cost is low, low-cost spectrophotometer is significant.
The utility model adopts optical filter to add the structure of monochromator, and optical filter is decomposed into monochromatic light with the mixed light of light source, and then detects through monochromator, has reached the effect of double monochromator.Through extensively consulting domestic and international public publication and the domestic and international patent documentation of retrieval, not seeing has optical filter to add the monochromator structure, reduces spectrophotometric report and product that the parasitic light index improves accuracy of detection.The utility model has been invented new product with optical filter and monochromator combination, has improved spectrophotometric accuracy of detection greatly, has produced new unexpected effect, has substantial technical progress.Therefore the utlity model has novelty, creativeness and practicality.
Summary of the invention
The purpose of this utility model provide a kind of simple in structure, cost is low, low price, the parasitic light index is low, detection sensitivity is high spectrophotometer.
The purpose of this utility model is achieved in that
The high concentration visible spectrophotometer is made up of shell, base plate, light source, monochromator, absorption of sample pond, pick-up unit, signal indicating device, is fixed with light source, monochromator, absorption of sample pond, pick-up unit on base plate respectively; Be provided with optical filter between monochromator and absorption of sample pond, light beam is decomposed into monochromatic light through monochromator, again after the optical filter beam split, enters absorption of sample pond, pick-up unit, testing result and shows by signal indicating device.
The optical filter wavelength is: 325-1000nm, bandwidth: 12nm, signal to noise ratio (S/N ratio): 1/1000.
Transmitance 〉=50%T.
High concentration visible spectrophotometer shell is provided with the RS-232C communication port and is connected with computing machine.
Main points of the present utility model are: with monochromator and optical filter combination, monochromator is decomposed into monochromatic light with the mixed light of light source, and then through the optical filter beam split, has reached the ultralow parasitic light accuracy of detection effect of double monochromator.Simultaneously because save a monochromator, possess simple in structure, volume is little, the advantage that cost is low.
Essential implementation of the present utility model is:
The parameter of optical filter: 325-1000nm, bandwidth: 12nm, signal to noise ratio (S/N ratio): 1/1000; Transmitance 〉=50%T.
The parameter of monochromator: CT type light path, adopt the holographic chromatic dispersion grating of high-performance.
Monochromator is 325---and can select arbitrarily in the 1000nm wavelength coverage, optical filter requires wavelength selected per sample, and at 340nm, it is 340nm that optical filter also should be selected centre wavelength as the sample wavelength.
For easy to operate, the utility model product is provided with keyboard and button on spectrophotometric shell.
Other parts of the utility model product are identical with existing spectrophotometer product.
In order to make spectrophotometer and robot calculator cooperating, the utility model product is provided with the RS-232C communication port, is connected with computing machine.The computing machine of various models can be connected supporting use with the utility model.
The utility model can select the reference sample of different absorbances to set demarcation on using method.Traditional spectrophotometric measurement be by the reference sample as 100%T, measure the transmitance or the absorbance of sample again, the variation of analytic sample content.The scope of a lot of enriched sample measured values is between 0.01～1%T, and this instrument can select the different content reference to do instrumental calibration.As select transmitance be 1%T reference sample as instrumental calibration, instrument detecting sensitivity improves 100 times, significantly improves the sample measurement precision simultaneously.The utility model method and the utility model product are used, and have reached more high-precision test effect.The method of sample high Precision Detection may further comprise the steps:
(1) gets reference, insert the absorption of sample pond, detect reference numerical value, by spectrophotometric communication interface input computing machine;
(2) according to the reference testing result, computer installation fixed proportion multiple;
(3) get test sample and insert the absorption of sample pond, test sample numerical value, input computing machine;
(4) computing machine show sample numerical value.
The utility model makes testing result from the 3A level, brings up to the 6A level, and the sample detection precision improves greatly, and spectrophotometric performance and quality improve greatly, and measuring accuracy also can be greatly improved.
The utility model shift in product mix, the variation that has brought practicality makes the utility model high concentration visible spectrophotometer in every field such as agricultural product, food, health, medicine, chemical industry, scientific research, education more extensive, important use be arranged all.Therefore the utlity model has substantial technical progress, have novelty, creativeness and practicality.The utility model is not only the technical progress of optic analytical instrument product, and has promoted the technical progress of each application of the utility model product, so the utility model is a very significant invention.
The utlity model has following advantage:
1. result of use is good, sample detection precision height;
2. simple in structure;
3. easy to operate;
4. cost of products is low.
Description of drawings
Fig. 1 is the utility model high concentration visible spectrophotometer structural map;
Fig. 2 is the utility model high concentration visible spectrophotometer outside drawing;
Fig. 3 is that embodiment 1 uses the utility model optical filter high Precision Detection collection of illustrative plates.
Among the figure: 1 is that spectrophotometer shell, 2 is that base plate, 3 is that light source, 4 is that monochromator, 5 is that optical filter, 6 is that absorption of sample pond, 7 is that pick-up unit, 8 is that signal indicating device, 9 is that spectrophotometer keyboard, 10 is that button, 11 is a communication interface.
Embodiment
Below by embodiment the utility model is described further.
Embodiment 1:
The high concentration visible spectrophotometer, model: 723HC; Physical dimension: 440 * 370 * 200 millimeters, power supply 220V50HZ300W.Form by shell 1, base plate 2, light source 3, monochromator 4, optical filter 5, absorption of sample pond 6, pick-up unit 7, signal indicating device 8.Shell 1 is made by engineering plastics, and base plate 2 is made by 1.5 millimeters sheet metal materials, and light source 3 is a tungsten lamp.On base plate 2, be provided with monochromator 4, optical filter 5, monochromator and optical filter wavelength are 340nm, and the monochromator bandwidth is 6nm, and the optical filter bandwidth is 12nm.Optical filter 5 is located between monochromator 4 and the absorption of sample pond 6, and pick-up unit 7 is arranged on the back of absorption cell 6; Signal indicating device 8 is located at the front of shell 1.Also be provided with keyboard 9 on the front of spectrophotometer shell 1, keyboard 9 is provided with button 10, convenient spectrophotometric operation and use.The bottom, side of spectrophotometer shell 1 is provided with communication interface 11, and desk-top computer is by communication interface 11 connection work.
Embodiment 2:
The high concentration visible spectrophotometer, model: 723HC; Physical dimension: 440 * 370 * 200 millimeters, power supply 220V50HZ300W.Form by shell 1, base plate 2, light source 3, monochromator 4, optical filter 5, absorption of sample pond 6, pick-up unit 7, signal indicating device 8.Shell 1 is made by engineering plastics, and base plate 2 is made by 1.5 millimeters sheet metal materials, and light source 3 is a tungsten lamp.On base plate 2, be provided with monochromator 4, optical filter 5, monochromator and optical filter wavelength are 405nm, and the monochromator bandwidth is 6nm, and the optical filter bandwidth is 12nm.Optical filter 5 is located between monochromator 4 and the absorption of sample pond 6, and pick-up unit 7 is arranged on the back of absorption cell 6; Signal indicating device 8 is located at the front of shell 1.Also be provided with keyboard 9 on the front of spectrophotometer shell 1, keyboard 9 is provided with button 10, convenient spectrophotometric operation and use.The bottom, side of spectrophotometer shell 1 is provided with communication interface 11, and notebook is by communication interface 11 connection work.
Embodiment 3:
Present embodiment uses the utility model high concentration visible spectrophotometer that optical filter is carried out high Precision Detection.Operation steps is:
1. start the visible visible spectrophotometer of 723HC high concentration, preheating after 20 minutes automatically self check finish.
2. open upper layer software (applications), on-line working.
3. the instrument slit location is adjusted to 4#, puts into the optical filter sample and carries out self check.
4. set up baseline input wavelength scope as required: initial 325nm～termination 600nm.
5. put into the optical filter sample, click scan promptly gets measurement result.
6. preserve and print measurement result.
The present embodiment testing result is seen accompanying drawing 3 and table 1.
Fig. 3 is the inspection by optical filter, examination scope 325～600nm, and common spectrophotometer cut-off region can only detect 3A, and this light photometer can detect the above data of 3A, and data stabilization, detailed data sees Table 1.
Table 1: interference filter test data
TestDate: 2009-08-22
Wavelength absorbance transmitance wavelength absorbance transmitance wavelength absorbance transmitance
325 2.742 0.181 355 2.338 0.459 385 6 0
326 2.578 0.264 356 2.457 0.349 386 6 0
327 2.387 0.41 357 2.581 0.262 387 6 0
328 2.176 0.667 358 2.683 0.208 388 6 0
329 1.931 1.172 359 2.803 0.157 389 6 0
330 1.654 2.217 360 2.895 0.127 390 6 0
331 1.354 4.424 361 2.994 0.101 391 6 0
332 1.04 9.118 362 3.085 0.082 392 6 0
333 0.735 18.419 363 3.157 0.07 393 6 0
334 0.488 32.496 364 3.244 0.057 394 6 0
335 0.321 47.713 365 3.321 0.048 395 6 0
336 0.229 59.072 366 3.379 0.042 396 6 0
337 0.19 64.603 367 3.489 0.032 397 6 0
338 0.179 66.152 368 3.579 0.026 398 6 0
339 0.177 66.465 369 3.629 0.024 399 6 0
340 0.176 66.657 370 3.802 0.016 400 6 0
341 0.178 66.388 371 3.908 0.012 401 6 0
342 0.189 64.762 372 4.218 0.006 402 6 0
343 0.2216 0.107 373 4.528 0.003 403 6 0
344 0.291 51.184 374 4.537 0.003 404 6 0
345 0.405 39.37 375 6 0 405 6 0
346 0.568 27.037 376 6 0 406 6 0
347 0.774 16.809 377 6 0 407 6 0
348 1.005 9.89 378 6 0 408 6 0
349 1.25 5.619 379 6 0 409 6 0
350 1.483 3.288 380 6 0 410 6 0
351 1.691 2.039 381 6 0 411 6 0
352 1.879 1.32 382 6 0 412 6 0
353 2.048 0.895 383 6 0 413 6 0
354 2.2 0.631 384 6 0
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for those skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. high concentration visible spectrophotometer, form by shell (1), base plate (2), light source (3), monochromator (4), absorption of sample pond (6), pick-up unit (7), signal indicating device (8), it is characterized in that: on base plate (2), be fixed with light source (3), monochromator (4), absorption of sample pond (6), pick-up unit (7) respectively; Between monochromator (4) and absorption of sample pond (6), be provided with optical filter (5), light beam is decomposed into monochromatic light through monochromator (4), after optical filter (5) beam split, enter absorption of sample pond (6), pick-up unit (7), testing result again by signal indicating device (8) demonstration.
2. high concentration visible spectrophotometer according to claim 1 is characterized in that: optical filter (5) wavelength is: 325-1000nm, bandwidth: 12nm, signal to noise ratio (S/N ratio): 1/1000; Transmitance 〉=50%T.
3. high concentration visible spectrophotometer according to claim 1 is characterized in that: high concentration visible spectrophotometer shell (1) is provided with RS-232C communication port (11) and is connected with computing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202093999U CN201697871U (en) | 2009-09-08 | 2009-09-08 | High-concentration visible spectrophotometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202093999U CN201697871U (en) | 2009-09-08 | 2009-09-08 | High-concentration visible spectrophotometer |
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| Publication Number | Publication Date |
|---|---|
| CN201697871U true CN201697871U (en) | 2011-01-05 |
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| CN2009202093999U Expired - Fee Related CN201697871U (en) | 2009-09-08 | 2009-09-08 | High-concentration visible spectrophotometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104508457A (en) * | 2012-08-24 | 2015-04-08 | 株式会社日立高新技术 | Spectrophotometer |
-
2009
- 2009-09-08 CN CN2009202093999U patent/CN201697871U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104508457A (en) * | 2012-08-24 | 2015-04-08 | 株式会社日立高新技术 | Spectrophotometer |
| CN104508457B (en) * | 2012-08-24 | 2017-05-24 | 株式会社日立高新技术 | Spectrophotometer |
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| 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 |
Granted publication date: 20110105 Termination date: 20170908 |
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| CF01 | Termination of patent right due to non-payment of annual fee |