CN102680422A - Spectrophotometer optical system and special optical filter picking mechanism for same - Google Patents
Spectrophotometer optical system and special optical filter picking mechanism for same Download PDFInfo
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- CN102680422A CN102680422A CN2012101851897A CN201210185189A CN102680422A CN 102680422 A CN102680422 A CN 102680422A CN 2012101851897 A CN2012101851897 A CN 2012101851897A CN 201210185189 A CN201210185189 A CN 201210185189A CN 102680422 A CN102680422 A CN 102680422A
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Abstract
The invention relates to a spectrophotometer optical system and a special optical filter picking mechanism for the same. The spectrophotometer optical system comprises a front light path (A), a sample cell (1), an optical splitting system (B) and a photoelectric receiver (2), and is characterized in that the front light path (A) comprises a light source (3) on the front end of the sample cell (1), wherein the light of the light source (3) is transmitted onto a first convex lens (4), a first reflection mirror (5) is installed at the side of the first convex lens (4) to be symmetric to the light source (3), the first reflection mirror (5) is arranged on a focal point of the first convex lens (4), the light enters the optical splitting system (B) from the sample cell (1) after being reflected by the first reflection mirror (5) to the sample cell (1), and the light is emitted onto the photoelectric receiver (2) after being analyzed by the optical splitting system (B). According to a spectrophotometer manufactured by the optical system provided by the invention, the size of the spectrophotometer can be reduced, the cost is greatly reduced, and the mass popularization is realized.
Description
Technical field
The present invention relates to the spectral instrument technical field that material composition is analyzed, specifically be exactly a kind of through to by analytic sample and standard specimen light intensity to the recently spectrophotometric optical system and the dedicated optical filter plectrum device thereof of amalyzing substances composition.
Background technology
Known, visible spectrophotometer can be at black light---and visible spectrum is made qualitative and quantitative analysis to sample material in the zone, is one of physical and chemical experiment chamber spectrometric instrument commonly used; Adopt advanced blazed grating monochromator, have the wavelength accuracy height, monochromaticity is good; Advantages such as parasitic light is low adopt microcomputer measurement system, and τ-A conversion accuracy is high; And automatic adjustment 0% and adjustment 100% are arranged, concentration factor is set, concentration readout, and can select the serial data printer to carry out the data printing function.Be widely used in medical and health, clinical examination, biological chemistry, petrochemical complex, environmental protection, departments such as quality control.
Spectrophotometric basic functional principle is that the material in the solution excites down in the irradiation of light, has produced the absorption effect to light, and material is to have optionally to the absorption of light.Various material all has its absorption spectrum separately; Therefore when certain monochromatic light passes through solution; Its energy will be absorbed and weaken; The degree that luminous energy weakens and the concentration of material have certain proportionate relationship, spectrophotometer utilize this principle come to by analytic sample and standard specimen light intensity to amalyzing substances composition recently.
As shown in Figure 1 in existing spectrophotometric optical system, the method for light path beam split before commonly adopting, its course of work is achieved in that it at first is the power-on switch; Make spectrophotometric light source a send continuous radiation light; Entering light inlet slot c was shone on the catoptron d after further assembling after continuous radiation light shone convex lens b line focus, and light reflexes to collimating mirror e through catoptron d, and light shines on the grating f from collimating mirror e; Chromatic dispersion takes place behind the light process grating f; Through shining to optical filter g with a branch of directional light ejaculation behind the light reflected back collimating mirror e of chromatic dispersion, some is filtered behind the light process optical filter g, penetrates from optical filter g with monochromatic form and gets into out optical slits h; Light is further assembled after being gone out to shine optically focused convex lens i after optical slits h assembles; Light shines sample cell j after optically focused convex lens i comes out, have part light to be absorbed by sample cell j, and the light that sees through gets into photelectric receiver k and after amplifying, read.The spectrophotometer that the light path light-splitting method is processed before this is owing to just shine into sample cell j behind light process grating h, optical filter g and the optically focused convex lens i; Sample cell j must be on the focus of optically focused convex lens i; So just make the bulky complex structure of spectrophotometer that adopts this preceding light path light-splitting method to process, price is also somewhat expensive.
Though it is less that Chinese patent CN101629905B discloses a kind of volume; Sample cell is placed on the light path system of the front end of whole spectral system; But the spectrophotometer of this patent has adopted the excitation side optical system directly to become monochromatic light after the light process excitation side optical system with light source, utilizes monochromatic light that sample is measured then, and the spectrophotometer price of this employing excitation side optical system is very expensive; Be unfavorable for practicing thrift cost, be not suitable for large-scale popularization.
Summary of the invention
The objective of the invention is to design a kind of spectrophotometric meter optical system; It includes preceding light path, sample cell, beam splitting system and photelectric receiver; It is characterized in that: light path is at the sample cell front end before said; Comprise light source, the light of light source is transmitted on first convex lens, and the along of a side of first convex lens and light source symmetry is equipped with first catoptron; Light comes out get into beam splitting system from sample cell through first mirror reflects behind sample cell; Beam splitting system comprises optical filter, light inlet slot, second catoptron, collimating mirror, grating, goes out optical slits, second convex lens, and light is equipped with second catoptron from the bright dipping light path that optical filter penetrates back entering light inlet slot, light inlet slot, on the second mirror reflects light path position collimating mirror is housed; On the collimating mirror collimated reflected light path corresponding grating is installed with second catoptron; Light impinges upon on the collimating mirror form with directional light and injects out optical slits through penetrating behind the grating beam splitting, goes out on the bright dipping light path of optical slits second convex lens are housed, and photelectric receiver is positioned on second convex lens and the focus that goes out optical slits symmetry one side.
In above-mentioned spectrophotometric meter optical system,, design a kind of optical filter plectrum device, comprise base for the purpose of the light of realizing optical filter transmission different wave length; Rotating shaft is contained on the base, and index plate is fixedly mounted in the rotating shaft, and cam nose bar gear train fixedly is equipped with in the index plate below; On the drive link of cam nose bar gear train the plectrum bar is housed fixedly; Said drive link can drive the plectrum bar and move around in the horizontal direction, and said plectrum bar is connected with optical filter through motion steering mechanism, and said drive link is positioned at and the plectrum pole pair fixedly is housed answers a side to be connected with spring; Spring is contained on the fixed bar, and spring is in compressive state.
Further, cam nose bar gear train comprises cam disc, and cam disc is fixedly mounted in the rotating shaft, cam disc outer circumference surface and drive link one end in contact, and surface of contact is the cam cambered surface.
Further, said motion steering mechanism is installed on the base, and said motion steering mechanism comprises the arc push rod, and arc push rod one end is connected with the plectrum bar, and an end props up optical filter, and the arc push rod drives optical filter and can swing back and forth.
Further, said motion steering mechanism comprises tooth bar, and tooth bar one end is connected with the plectrum bar, the rack and pinion engagement, and gear is installed on the gear shaft, is installed with optical filter on the gear shaft.
The beneficial effect that technical scheme provided by the present invention produces is that sample cell is placed on the beam splitting system front end; Utilize optical filter and common grating just can obtain required material composition and form data; Also need be placed in the analysis of carrying out material composition in the darkroom unlike common spectrophotometer that kind, reduce the restriction of spectrophotometer service condition, the spectrophotometer volume reduces simultaneously; Cost reduces greatly, is suitable for large-scale popularization.
Description of drawings
Accompanying drawing 1 is existing spectrophotometric beam splitting system synoptic diagram.
Accompanying drawing 2 is a beam splitting system synoptic diagram of the present invention.
Accompanying drawing 3 is special-purpose optical filter plectrum device first embodiment front views among the present invention.
Accompanying drawing 4 is special-purpose optical filter plectrum device first embodiment vertical views among the present invention.
Accompanying drawing 5 is A place enlarged drawings among Fig. 4 among the present invention.
Accompanying drawing 6 be among the present invention among Fig. 5 B to cut-open view.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is done further elaboration.
As attach shown in Fig. 1 and 2; A kind of spectrophotometric meter optical system that the present invention designed; It includes preceding light path A, sample cell 1, beam splitting system B and photelectric receiver 2; Wherein, said preceding light path A comprises light source 3 at sample cell 1 front end; The rayed of light source 3 is mapped on first convex lens 4; Light is from first catoptron 5 that shines first convex lens 4 and light source 3 symmetrical side focal positions after first convex lens 4 come out, and light reflexes to sample cell 1 back from first catoptron 5 and comes out to get into beam splitting system B from sample cell 1, and beam splitting system B comprises optical filter 6, light inlet slot 7, second catoptron 8, collimating mirror 9, grating 10, goes out optical slits 11, second convex lens 12; Light gets into beam splitting system B and at first passes optical filter 6; Light penetrates the back from optical filter 6 and gets into light inlet slots 7, shines second catoptron 8 on the light inlet slot 7 bright dipping light paths then, and light reflexes to collimating mirror 9 through second catoptron 8, and light is gone into grating 10 through collimating mirror 9 reflections are laggard; Impinge upon once more on the collimating mirror 9 after 10 beam split of light process grating and inject out optical slits 11 with the form of directional light; Light is mapped to second convex lens 12 from going out after optical slits comes out, through assembling once more on the photelectric receiver 2 that the back gets into second convex lens 12 and the along that goes out optical slits symmetry one side of second convex lens 12, photelectric receiver 2 shows through amplifying the component of just analyzing sample.
Shown in accompanying drawing 3,4,5 and 6; In above-mentioned spectrophotometric meter optical system, for the purpose of the light of realizing optical filter transmission different wave length, design a kind of optical filter plectrum device, first kind of embodiment of this optical filter plectrum device is: it comprises base 11; Rotating shaft 12 is contained on the base 11; Index plate 13 is fixedly mounted in the rotating shaft 12, and fixedly be equipped with index plate 13 belows, on the drive link 1401 of cam nose bar gear train 14 plectrum bar 15 is housed fixedly; Said drive link 1401 can drive plectrum bar 15 and move around in the horizontal direction, and said plectrum bar 15 is connected with optical filter 6 through motion steering mechanism 16; Said drive link 1401 is positioned at and plectrum bar 15 corresponding sides fixedly are housed are connected with spring 17, and spring 17 is contained on the fixed bar 18, and said spring 17 is in compressive state.
Said cam nose bar gear train 14 comprises cam disc 1402, and cam disc 1402 is fixedly mounted in the rotating shaft 12, cam disc 1402 outer circumference surfaces and drive link 1,401 one end in contact, and surface of contact is the cam cambered surface.
Said motion steering mechanism 16 is installed on the base 11.
Said motion steering mechanism 16 comprises arc push rod 1601, and arc push rod 1,601 one ends are connected with plectrum bar 15, and an end props up optical filter 6, and arc push rod 1601 drives optical filters 6 and can swing back and forth.
The second embodiment of the present invention is that said motion steering mechanism 16 can also be that it comprises tooth bar, and tooth bar one end is connected with plectrum bar 15, the rack and pinion engagement, and gear is installed on the gear shaft, is installed with optical filter 6 on the gear shaft.
The course of work of this optical filter plectrum device is to rotate index plate 13; Drive cam nose bar gear trains 14 through rotating shaft 12 and change circular motion into plectrum bar 15 moving around in the horizontal direction; Plectrum bar 15 move around and through the motion steering mechanism 16 conversion become swinging back and forth of optical filter 6; Swinging back and forth of optical filter 6 is owing to there is between different transmission areas the purpose of the light of the realization optical filter transmission different wave length that swings back and forth of optical filter 6 on the optical filter 6.
The beneficial effect that technical scheme provided by the present invention produces is that sample cell is placed on the beam splitting system front end; Utilize optical filter and common grating just can obtain required material composition and form data; Also need be placed in the analysis of carrying out material composition in the darkroom unlike common spectrophotometer that kind, reduce the restriction of spectrophotometer service condition, the spectrophotometer volume reduces simultaneously; Cost reduces greatly, is suitable for large-scale popularization.
Claims (9)
1. spectrophotometric meter optical system; It includes preceding light path (A), sample cell (1), beam splitting system (B) and photelectric receiver (2); It is characterized in that: light path (A) is at sample cell (1) front end before said; Comprise light source (3), the light of light source (3) is transmitted on first convex lens (4), and first convex lens (4) are equipped with first catoptron (5) with the along of a side of light source (3) symmetry; Light comes out to get into beam splitting system (B) from sample cell (1) after first catoptron (5) reflexes to sample cell (1), through shining on the photelectric receiver (2) after beam splitting system (B) beam split.
2. a kind of spectrophotometric meter optical system as claimed in claim 1; It is characterized in that: said beam splitting system (B) comprises optical filter (6), light inlet slot (7), second catoptron (8), collimating mirror (9), grating (10), goes out optical slits (11), second convex lens (12); Light is equipped with second catoptron (8) from the bright dipping light path that optical filter (6) penetrates back entering light inlet slot (7), light inlet slot (7); Second catoptron (8) is equipped with collimating mirror (9) on the reflected light path position; On collimating mirror (9) the collimated reflected light path corresponding grating (10) is installed with second catoptron (8); Light impinges upon collimating mirror (9) and goes up and inject out optical slits (11) with the form of directional light through penetrating after grating (10) beam split, goes out on the bright dipping light path of optical slits (11) second convex lens (12) are housed.
3. a kind of spectrophotometric meter optical system as claimed in claim 1 is characterized in that: photelectric receiver (2) is positioned at second convex lens (12) and goes out on the focus of optical slits symmetry one side.
4. a kind of spectrophotometric meter optical system as claimed in claim 1 is characterized in that: said grating (10) is common grating.
5. the dedicated optical filter plectrum device of a spectrophotometric meter optical system; It is characterized in that: it comprises base (11); Rotating shaft (12) is contained on the base (11); Index plate (13) is fixedly mounted in the rotating shaft (12), and cam nose bar gear train (14) fixedly is equipped with in index plate (13) below, and the drive link (1401) of cam nose bar gear train (14) is gone up plectrum bar (15) fixedly is housed; Said drive link (1401) can drive plectrum bar (15) and move around in the horizontal direction, and said plectrum bar (15) is connected with optical filter (6) through motion steering mechanism (16);
Said drive link (1401) is positioned at and the corresponding side of plectrum bar (15) fixedly is housed is connected with spring (17), and spring (17) is contained on the fixed bar (18), and said spring (17) is in compressive state.
6. the dedicated optical filter plectrum device of a kind of spectrophotometric meter optical system as claimed in claim 5; It is characterized in that: said cam nose bar gear train (14) comprises cam disc (1402); Cam disc (1402) is fixedly mounted on (12) in the rotating shaft; Cam disc (1402) outer circumference surface and drive link (1401) one end in contact, surface of contact is the cam cambered surface.
7. the dedicated optical filter plectrum device of a kind of spectrophotometric meter optical system as claimed in claim 5 is characterized in that: said motion steering mechanism (16) is installed on the base (11).
8. the dedicated optical filter plectrum device of a kind of spectrophotometric meter optical system as claimed in claim 7; It is characterized in that: said motion steering mechanism (16) comprises arc push rod (1601); Arc push rod (1601) one ends are connected with plectrum bar (15); One end props up optical filter (6), and arc push rod (1601) drives optical filter (6) and can swing back and forth.
9. the dedicated optical filter plectrum device of a kind of spectrophotometric meter optical system as claimed in claim 7; It is characterized in that: said motion steering mechanism (16) comprises tooth bar; Tooth bar one end is connected with plectrum bar (15); The rack and pinion engagement, gear is installed on the gear shaft, is installed with optical filter (6) on the gear shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101851897A CN102680422A (en) | 2012-06-06 | 2012-06-06 | Spectrophotometer optical system and special optical filter picking mechanism for same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101851897A CN102680422A (en) | 2012-06-06 | 2012-06-06 | Spectrophotometer optical system and special optical filter picking mechanism for same |
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| CN102680422A true CN102680422A (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438997A (en) * | 2013-08-16 | 2013-12-11 | 上海现科分光仪器有限公司 | Dividing plate gear control mechanism of spectrophotometer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752739A (en) * | 2005-10-21 | 2006-03-29 | 中国科学院上海光学精密机械研究所 | The spectrophotometer of quick measure spectrum |
| CN101408504A (en) * | 2007-10-11 | 2009-04-15 | 上海光谱仪器有限公司 | Method for reducing stray light of atomic absorption spectrum instrument using visible cut-off type optical filter and light path system thereof |
| CN201322814Y (en) * | 2008-12-26 | 2009-10-07 | 上海棱光技术有限公司 | Manually controlled linkage device of wavelength and optical filter |
| CN202837171U (en) * | 2012-06-06 | 2013-03-27 | 上海现科分光仪器有限公司 | Spectrophotometer optical system and specialized optical filter poking mechanism thereof |
-
2012
- 2012-06-06 CN CN2012101851897A patent/CN102680422A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752739A (en) * | 2005-10-21 | 2006-03-29 | 中国科学院上海光学精密机械研究所 | The spectrophotometer of quick measure spectrum |
| CN101408504A (en) * | 2007-10-11 | 2009-04-15 | 上海光谱仪器有限公司 | Method for reducing stray light of atomic absorption spectrum instrument using visible cut-off type optical filter and light path system thereof |
| CN201322814Y (en) * | 2008-12-26 | 2009-10-07 | 上海棱光技术有限公司 | Manually controlled linkage device of wavelength and optical filter |
| CN202837171U (en) * | 2012-06-06 | 2013-03-27 | 上海现科分光仪器有限公司 | Spectrophotometer optical system and specialized optical filter poking mechanism thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438997A (en) * | 2013-08-16 | 2013-12-11 | 上海现科分光仪器有限公司 | Dividing plate gear control mechanism of spectrophotometer |
| CN103438997B (en) * | 2013-08-16 | 2015-11-18 | 上海现科分光仪器有限公司 | A kind of spectrophotometer index plate position control mechanism |
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Application publication date: 20120919 |