CN105973829A - Double-light-beam infrared spectrophotometer with double infrared detectors - Google Patents
Double-light-beam infrared spectrophotometer with double infrared detectors Download PDFInfo
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- 230000003287 optical effect Effects 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 10
- 238000002835 absorbance Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000013074 reference sample Substances 0.000 claims description 8
- 230000000737 periodic effect Effects 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000004433 infrared transmission spectrum Methods 0.000 claims description 5
- 238000001228 spectrum Methods 0.000 claims description 5
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- 238000002834 transmittance Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
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- 238000004566 IR spectroscopy Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 230000011514 reflex Effects 0.000 description 2
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- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 235000008434 ginseng Nutrition 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
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Abstract
The invention provides a double-light-beam infrared spectrophotometer with double infrared detectors. The double-light-beam infrared spectrophotometer comprises an infrared source unit, an infrared filter monochromic unit, a double-light-beam light path system with a light chopping reflector, a sample chamber, a reference light receiving unit, a sample light receiving unit, an electrosignal processing and collecting system and a controlling and data processing system, the infrared filter monochromic unit is in light path connection with the infrared source unit and comprises an infrared filter and an infrared monochromator which are in light path connection, the double-light-beam light path system is in light path connection with the infrared filter or the infrared monochromator, the sample chamber is in light path connection with the double-light-beam light path system, the reference light receiving unit is in light path connection with the sample chamber, the sample light receiving unit is in light path connection with the sample chamber, the electrosignal processing and collecting system is in light path connection with the reference light receiving unit and the sample light receiving unit, and the controlling and data processing system is connected with the electrosignal processing and collecting system and the infrared monochromator. The double-light-beam infrared spectrophotometer has the advantages of simplicity and convenience in light path adjusting, high measuring speed and high transmittance measuring accuracy.
Description
Technical field
The present invention relates to a kind of light splitting type drug-beam infrared spectrophotometer, particularly to one with double infrared
The drug-beam infrared spectrophotometer of photodetector.
Background technology
Drug-beam infrared spectrophotometer is a kind of based on grating or prismatic decomposition, red for measurement of species
Outer transmission or the instrument of absorption spectrum.Red at the dual-beam with former Tianjin optical instrument factory TJ270-30 as representative
In outer spectrophotometer, the infrared light sent from infrared light supply unit is first divided into two bundles, i.e. reference light and sample
Product light, then after switching over the double-beam system of chopping the light reflecting mirror, two-beam will be along same
Light path enters in monochromator, then is received by an infrared light detector after optical filter.
There is problems with and shortcoming in this infrared luminosity protractor:
1, in order to ensure that dual-beam finally can enter infrared light monochromator along same light path, regulate extremely complex,
It is difficult to ensure that the two-beam energy entering infrared light monochromator is essentially equal.
2, from the signal of telecommunication output waveform of infrared light detecting device along with sample numerical value and referential data strength ratio
Different and different, data processing precision is poor, and the frequency working as the waveform that transmitance is 100% is that transmitance is
The twice of waveform when 0%.
3, the Photoresponse of infrared light detecting device declines along with the rising of frequency.In this case,
We are difficult to, by the method improving chopping frequency, improve spectral measurement speed, so the measurement of TJ27-30
Speed is the slowest.When wavenumber resolution is 1/cm, from sweeping required for 4000/cm scans 400/cm
The time of retouching is about 20 minutes.
Summary of the invention
The present invention proposes a kind of drug-beam infrared spectrophotometer with double infrared light detectors, solves existing
There is problem above-mentioned in technology.
The technical scheme is that and be achieved in that:
A kind of drug-beam infrared spectrophotometer with double infrared light detectors, including:
Infrared light supply unit, is used for producing and converging infrared light；
Infrared filtering monochrome cells, is connected with described infrared light supply unit light path, including analyzed for selecting
The infrared fileter of infrared band and monochromatic for infrared light being carried out the infrared light of light splitting and monochromatization
Device, described infrared fileter is connected with described infrared light monochromator light path；
With the dual-beam light path system of chopping the light reflecting mirror, it is used for will transmit through described infrared fileter or infrared light
The monochromatic light of monochromator is alternately divided into reference light and sample light, with described infrared fileter or described infrared light
Monochromator light path connects；
Sample room, is used for placing reference sample and analyzed sample, with described double light with chopping the light reflecting mirror
Beam optical path system light path connects；
With reference to light receiving unit, it is used for receiving, converging reference light, and described reference light is converted to the signal of telecommunication,
It is connected with described sample room light path；
Sample light receiving unit, is used for receiving, converging sample light, and described sample light is converted to the signal of telecommunication,
It is connected with described sample room light path；
Electric signal processing and acquisition system, be used for processing and gather described reference light receiving unit and described sample
The signal of telecommunication of light receiving unit output, to obtain reference light and the light intensity of sample light and to obtain the absorbance of sample,
It is connected with reference to light receiving unit and described sample light receiving unit light path with described；
Control and data handling system, be used for controlling described infrared fileter and described infrared light monochromator with complete
Become spectral scan, process data and show infrared transmission spectra or the absorption spectrum of sample, with the described signal of telecommunication
Process and connect with acquisition system and described infrared light monochromator.
Further, described infrared light supply unit includes infrared light supply and the reflecting mirror being sequentially connected with according to light path,
Described reflecting mirror is coquille, ellipsoidal mirror or parabolic lens.
Preferably, described infrared fileter is bandpass filter.
Preferably, described infrared light monochromator is C-T type monochromator or Li Teluo type monochromator.
Further, the described dual-beam light path system with chopping the light reflecting mirror include plane mirror and with
The optical chopper of reflecting mirror, through the monochromatic light of described infrared fileter or infrared light monochromator through the cycle
Property rotate optical chopper after be alternately divided into two bundles, wherein the light beam directly through optical chopper is
Direct beam, the light beam reflected by optical chopper upper reflector is reflection light beam, described reflection light beam and institute
State direct beam to be non-parallel beam and respectively enter in described sample room.
Further, the described dual-beam light path system with chopping the light reflecting mirror includes plane mirror, shallow ellipse
Coquille or coquille and the optical chopper with reflecting mirror, through described infrared fileter or infrared light list
The monochromatic light of color device is alternately divided into two bundles after the optical chopper of periodic rotary, the most directly wears
The light beam crossing optical chopper is direct beam, and the light beam reflected by optical chopper upper reflector is reflection light
Bundle, described direct beam reflects through plane mirror, and described reflection light beam is through plane mirror and plane
Reflecting mirror reflects, and respectively enters in sample room after becoming the light beam that two bundles are parallel.
Drug-beam infrared spectrophotometer with double infrared light detectors the most of the present invention, also
Including:
Reference sample support, is positioned in described sample room；
Analyzed sample holder, is positioned in described sample room.
Further, described include reflecting mirror and the first infrared light detector with reference to light receiving unit, described instead
Penetrate mirror for reference light being converged at the window of described first infrared light detector；Described sample light-receiving list
Unit includes reflecting mirror and the second infrared light detector, and described reflecting mirror is for converging at described second by sample light
On the window of infrared light detector；Described reflecting mirror is coquille, ellipsoidal mirror or parabolic lens.
The invention have the benefit that
Drug-beam infrared spectrophotometer with double infrared light detectors of the present invention, connects at reference light
Receive in unit and sample light receiving unit and all contain an infrared detector, by controlling infrared monochromator and cutting
Change infrared fileter and change the wavelength of sample light and reference light continuously, simultaneously measuring samples light and reference light
Light intensity also obtains strength ratio, absorbance, just can obtain the infrared transmission spectra of sample, have optical path adjusting
Simplicity, measuring speed is fast, the advantage that transmissivity measurement precision is high.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the existing dual-beam ir spectrophotometry with former Tianjin optical instrument factory TJ270-30 as representative
The structured flowchart of meter；
Fig. 2 is the structural frames of a kind of drug-beam infrared spectrophotometer with double infrared light detectors of the present invention
Figure；
Fig. 3 is a kind of drug-beam infrared spectrophotometer embodiment one with double infrared light detectors of the present invention
Optical schematic diagram；
Fig. 4 is a kind of drug-beam infrared spectrophotometer embodiment two with double infrared light detectors of the present invention
Optical schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
In order to be more fully understood that the present invention, first double to former Tianjin optical instrument factory TJ270-30 as representative
Light beam infrared spectrophotometer illustrates, as it is shown in figure 1, its from infrared light supply unit 1 send infrared
Light is first divided into two bundles, i.e. reference light and sample light, enters sample room 2, then warp then referring to light and sample light
Crossing after the dual-beam light path system 3 with copped wave reflecting mirror switches over, reference light and sample light are along same
Bar light path enters in infrared light monochromator 4, then by an infrared light detecting unit 6 after infrared fileter 5
Receiving, the signal of telecommunication of infrared light detecting unit 6 output is gathered by Electric signal processing and acquisition system 7 and processes,
Final control controls infrared filtering with data handling system 8 according to the signal of Electric signal processing and acquisition system 7
Sheet 5 and infrared light monochromator 4 are to complete spectral scan, process data and show the infrared transmission spectra of sample
Or absorption spectrum.Above-mentioned drug-beam infrared spectrophotometer is in order to ensure that dual-beam finally can be along same light path
Enter infrared light monochromator 4, regulate extremely complex, it is difficult to ensure to enter the two-beam energy of infrared light monochromator 4
Measure essentially equal；From the signal of telecommunication output waveform of infrared light detecting unit 6 along with sample numerical value and referential data
The difference of strength ratio and different, data processing precision is poor, and when the frequency of the waveform that transmitance is 100% is
The twice of waveform when transmitance is 0%；The Photoresponse of infrared light detecting unit 6 along with frequency rising and
Declining, in this case, we are difficult to the method by improving chopping frequency, improve spectral measurement speed
Degree, so the measuring speed of TJ27-30 is very slow, when wavenumber resolution is 1/cm, sweeps from 4000/cm
Sweep time required for retouching 400/cm is about 20 minutes.
In order to solve above-mentioned problem, a kind of dual-beam with double infrared light detectors of the present invention is red
Outer spectrophotometer, as in figure 2 it is shown, include:
Infrared light supply unit 9, is used for producing and converging infrared light；
Infrared filtering monochrome cells, is connected with infrared light supply unit 9 light path, including analyzed for selecting
The infrared fileter 10 of infrared band and for infrared light being carried out the infrared light monochromator of light splitting and monochromatization
11, infrared fileter 10 is connected with infrared light monochromator 11 light path；
With the dual-beam light path system 12 of chopping the light reflecting mirror, it is used for will transmit through infrared fileter 10 or infrared light
The monochromatic light of monochromator 11 is alternately divided into reference light and sample light, with infrared fileter 10 or infrared light list
Color device 11 light path connects；
Sample room 13, is used for placing reference sample and analyzed sample, with the dual-beam with chopping the light reflecting mirror
Light path system 12 light path connects；
With reference to light receiving unit 14, it is used for receiving, converging reference light, and reference light is converted to the signal of telecommunication,
It is connected with sample room 13 light path；
Sample light receiving unit 15, is used for receiving, converging sample light, and sample light is converted to the signal of telecommunication,
It is connected with sample room 13 light path；
Electric signal processing and acquisition system 16, connect with reference to light receiving unit 14 and sample light for processing and gathering
Receive the signal of telecommunication of unit 15 output, to obtain reference light and the light intensity of sample light and to obtain the absorbance of sample,
It is connected with reference to light receiving unit 14 and sample light receiving unit 15 light path；
Control and data handling system 17, be used for controlling infrared fileter 10 and infrared light monochromator 11 with complete
Become spectral scan, process data and show infrared transmission spectra or the absorption spectrum of sample, with Electric signal processing
Connect with acquisition system 16 and infrared light monochromator 11.
Wherein, before infrared fileter 10 both can be arranged on infrared light monochromator 11, it is also possible to be arranged on
After infrared light monochromator 11.
Wherein it is preferred to, described infrared fileter 10 is bandpass filter.
Wherein it is preferred to, described infrared light monochromator 11 is C-T type monochromator or Li Teluo type monochromator.
The operation principle of the drug-beam infrared spectrophotometer with double infrared light detectors of the present invention
For: the infrared light first launched from infrared light supply unit 9 converges at the entrance slit of infrared light monochromator 11,
Infrared fileter 10 is placed at the exit slit of infrared light monochromator 11 or at entrance slit；Through infrared light list
Infrared monochromatic light after color device 11 and infrared fileter 10 is through the dual-beam light with chopping the light reflecting mirror
Being divided into two light beams after road system 12, switch over chopping the light reflecting mirror, two light beams inject sample room 13 again
In, it is referred to as sample beam by the light beam of sample, additionally light beam is referred to as reference beam, and sample beam is converged
Receiving with sample light receiving unit 15 after Ju, reference beam receives with reference to light receiving unit 14 after being accumulated,
Photoelectric conversion signal after Electric signal processing and acquisition system 16 process and collected, simultaneously by control with
Data handling system 17 controls the size of the slit of infrared light monochromator 11 and the position of grating, completes spectrum
Scanning, data process and the display of spectrum.
In order to be more fully understood that the dual-beam ir spectrophotometry with double infrared light detectors of the present invention
Meter, it is provided that specific embodiment is as follows:
Embodiment one:
As it is shown on figure 3, infrared light supply unit includes infrared light supply 18 and the reflecting mirror 19 being sequentially connected with according to light path,
Reflecting mirror 19 is coquille, ellipsoidal mirror or parabolic lens；Dual-beam light path system 12 with chopping the light reflecting mirror
Including plane mirror 24 with the optical chopper 26 of reflecting mirror, through infrared fileter 25 or infrared
The monochromatic light of light monochromator 11 is alternately divided into two bundles after the optical chopper 26 of periodic rotary,
Wherein the light beam directly through optical chopper 26 is direct beam, anti-by optical chopper 26 upper reflector
The light beam penetrated is non-parallel beam for reflection light beam, reflection light beam and direct beam and respectively enters sample room 13
In；Reference sample support 30 and analyzed sample holder 27 it is placed with in sample room 13；Reference light receives single
Unit 14 includes reflecting mirror 31 and the first infrared light detector 32, and reflecting mirror 31 for converging at the by reference light
On the window of one infrared light detector 32；Sample light receiving unit 15 includes reflecting mirror 28 and the second infrared light
Detector 29, reflecting mirror 28 for converging at the window of the second infrared light detector 29 by sample light；Instead
Penetrating mirror 31,28 is coquille, ellipsoidal mirror or parabolic lens.
In the present embodiment, infrared light monochromator 11 includes slit 20,23, collimation parabolic lens or coquille
21, and grating 22.
During work, the infrared light sent from infrared light supply 18 converges and reflexes to slit 20 through reflecting mirror 19
Place, then through collimation parabolic lens or coquille 21 reflex at grating 22, through grating 22 diffraction light again
Converging at slit 23 through collimation parabolic lens or coquille 21, diffraction light is anti-through plane mirror 24 again
Penetrate and pass through infrared fileter 25 and select the infrared light of particular range of wavelengths, cut through the optics with reflecting mirror
After ripple device 26, along with the periodic rotary of reflecting mirror, light beam is alternately divided into two bundles, is reflected by a reflector
Light beam through being converged on the first infrared light detector 32 by reflecting mirror 31 after reference sample support 30；Directly
Connect the light beam through optical chopper 26 and converged to second through after analyzed sample holder 27 by reflecting mirror 28
Infrared light detector 29.If sample is placed on analyzed sample holder 27, the second infrared light
The light intensity of detector 29 detection is sample beam light intensity Is, and the light intensity of the first infrared light detector 32 detection is ginseng
Examine Shu Guangqiang Ir, then the absorbance of sample is Is/Ir, by controlling the rotation of grating 22 and switching the reddest
Outer optical filter 25, can obtain the collection of illustrative plates that absorbance changes with infrared wavelength or wave number, and i.e. sample is red
External spectrum.
LITTROW monochromator is have employed, if using CZERNY mono-TURNER mono-in this programme
Color device can also realize equally.It addition, reflecting mirror in the optical path can be put in the position of figure intermediate infrared filter 25
Between 19 and slit 20.
Embodiment two:
As shown in Figure 4, infrared light supply unit includes infrared light supply 33 and the reflecting mirror 34 being sequentially connected with according to light path,
Reflecting mirror 34 is coquille, ellipsoidal mirror or parabolic lens；Dual-beam light path system 12 with chopping the light reflecting mirror
Including plane mirror 40,41, shallow ellipsoidal mirror or coquille 42 and the optical chopper with reflecting mirror
43, the monochromatic light through infrared fileter 35 or infrared light monochromator 11 is cut through the optics of periodic rotary
Alternately being divided into two bundles after ripple device 43, wherein the light beam directly through optical chopper 43 is direct beam,
Being reflection light beam by the light beam of optical chopper 43 upper reflector reflection, direct beam is through plane mirror 46
Reflection, reflection light beam reflects through plane mirror 44 and plane mirror 45, becomes the light that two bundles are parallel
Respectively enter after bundle in sample room 13；Reference sample support 47 and analyzed sample it is placed with in sample room 13
Support 48；Reflecting mirror 51 and the first infrared light detector 52, reflecting mirror 51 is included with reference to light receiving unit 14
For reference light being converged at the window of the first infrared light detector 52；Sample light receiving unit 15 includes
Reflecting mirror 49 and the second infrared light detector 50, reflecting mirror 49 is for converging at the second infrared light by sample light
On the window of detector 50；Reflecting mirror 51,49 is coquille, ellipsoidal mirror or parabolic lens.
In the present embodiment, infrared light monochromator 11 includes slit 36,39, collimation parabolic lens or coquille
37, and grating 38.
The present embodiment two, compared with embodiment one, can make reference light and sample parallel light, and light path is more regular,
It is more conducive to selection and the parameter adjustment of sample room.
Drug-beam infrared spectrophotometer with double infrared light detectors of the present invention, uses light beam
Enter infrared light monochromator 11, then the light from infrared light monochromator 11 outgoing is divided into two light paths, then with two
Individual infrared detector, i.e. surveys the intensity of dual-beam with reference to light receiving unit 14 and sample light receiving unit 15,
Owing to using two infrared detectors to detect the intensity of reference beam and sample beam respectively, infrared detector
Output waveform is unrelated with the absorbance of sample, is a simple sine wave, convenient signal treatment, the signal of telecommunication
Amplitude is directly proportional to light intensity, therefore can measure correct transmittance, can solve the transmission in TJ270-30 product
The problem higher than precision, simultaneously because have employed two infrared detectors, only need to improve chopping frequency
Improving the measuring speed of absorbance, and the intensity of dual-beam can be the most measured, this will significantly improve light
The scanning speed of spectrum.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (8)
1. the drug-beam infrared spectrophotometer with double infrared light detectors, it is characterised in that including:
Infrared light supply unit (9), is used for producing and converging infrared light；
Infrared filtering monochrome cells, is connected, including for selecting quilt with described infrared light supply unit (9) light path
The infrared fileter (10) of the infrared band analyzed and for infrared light being carried out the red of light splitting and monochromatization
Outer smooth monochromator (11), described infrared fileter (10) is connected with described infrared light monochromator (11) light path；
With the dual-beam light path system (12) of chopping the light reflecting mirror, it is used for will transmit through described infrared fileter (10)
Or the monochromatic light of infrared light monochromator (11) is alternately divided into reference light and sample light, with described infrared filtering
Sheet (10) or described infrared light monochromator (11) light path connect；
Sample room (13), is used for placing reference sample and analyzed sample, with described with chopping the light reflecting mirror
Dual-beam light path system (12) light path connects；
With reference to light receiving unit (14), it is used for receiving, converging reference light, and described reference light is converted to electricity
Signal, is connected with described sample room (13) light path；
Sample light receiving unit (15), is used for receiving, converging sample light, and described sample light is converted to electricity
Signal, is connected with described sample room (13) light path；
Electric signal processing and acquisition system (16), be used for processing and gather described reference light receiving unit (14)
The signal of telecommunication exported with described sample light receiving unit (15), to obtain the light intensity of reference light and sample light also
Obtain the absorbance of sample, with described with reference to light receiving unit (14) and described sample light receiving unit (15)
Light path connects；
Control and data handling system (17), be used for controlling described infrared fileter (10) and described infrared light
Monochromator (11) is to complete spectral scan, process data and show infrared transmission spectra or the absorbing light of sample
Spectrum, is connected with described Electric signal processing and acquisition system (16) and described infrared light monochromator (11).
Drug-beam infrared spectrophotometer with double infrared light detectors the most according to claim 1,
It is characterized in that, described infrared light supply unit include the infrared light supply (18,33) that is sequentially connected with according to light path and
Reflecting mirror (19,34), described reflecting mirror (19,34) is coquille, ellipsoidal mirror or parabolic lens.
Drug-beam infrared spectrophotometer with double infrared light detectors the most according to claim 1,
It is characterized in that, described infrared fileter (10) is bandpass filter.
Drug-beam infrared spectrophotometer with double infrared light detectors the most according to claim 1,
It is characterized in that, described infrared light monochromator (11) is C-T type monochromator or Li Teluo type monochromator.
Drug-beam infrared spectrophotometer with double infrared light detectors the most according to claim 1,
It is characterized in that, the described dual-beam light path system (12) with chopping the light reflecting mirror includes plane mirror (24)
With the optical chopper (26) with reflecting mirror, through described infrared fileter (10) or infrared light monochromator
(11) monochromatic light is alternately divided into two bundles after the optical chopper (26) of periodic rotary, its
In be direct beam directly through the light beam of optical chopper (26), by the upper reflection of optical chopper (26)
The light beam of mirror reflection is reflection light beam, and described reflection light beam and described direct beam are non-parallel beam and difference
Enter in described sample room (13).
Drug-beam infrared spectrophotometer with double infrared light detectors the most according to claim 1,
It is characterized in that, the described dual-beam light path system (12) with chopping the light reflecting mirror include plane mirror (40,
41), shallow ellipsoidal mirror or coquille (42) and the optical chopper (43) with reflecting mirror, through described
The monochromatic light of infrared fileter (10) or infrared light monochromator (11) is through the optics copped wave of periodic rotary
Alternately being divided into two bundles after device (43), wherein the light beam directly through optical chopper (43) is direct
Light beam, is reflection light beam, described direct beam warp by the light beam of optical chopper (43) upper reflector reflection
Crossing plane mirror (46) reflection, described reflection light beam is through plane mirror (44) and plane mirror
(45) reflection, respectively enters after becoming the light beam that two bundles are parallel in sample room (13).
Drug-beam infrared spectrophotometer with double infrared light detectors the most according to claim 1,
It is characterized in that, also include:
Reference sample support (30,47), is positioned in described sample room (13)；
Analyzed sample holder (27,48), is positioned in described sample room (13).
Drug-beam infrared spectrophotometer with double infrared light detectors the most according to claim 1,
It is characterized in that, described reference light receiving unit (14) includes reflecting mirror (31,51) and the first infrared light
Detector (32,52), described reflecting mirror (31,51) for converging at described first infrared light by reference light
On the window of detector (32,52)；Described sample light receiving unit (15) includes reflecting mirror (28,49)
With the second infrared light detector (29,50), described reflecting mirror (28,49) is for converging at institute by sample light
State on the window of the second infrared light detector (29,50)；Described reflecting mirror (31,51,28,49) is
Coquille, ellipsoidal mirror or parabolic lens.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727594A (en) * | 2017-11-24 | 2018-02-23 | 武汉量谱精密仪器有限公司 | The multisensor switching device of double beam spectrophotometer |
| CN107941704A (en) * | 2017-12-21 | 2018-04-20 | 徐海峰 | A kind of combined multi-mode spectrophotometer |
| US11874229B2 (en) | 2022-04-07 | 2024-01-16 | Onto Innovation Inc. | Apparatus and method for multiple source excitation Raman spectroscopy |
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| CN107941704A (en) * | 2017-12-21 | 2018-04-20 | 徐海峰 | A kind of combined multi-mode spectrophotometer |
| US11874229B2 (en) | 2022-04-07 | 2024-01-16 | Onto Innovation Inc. | Apparatus and method for multiple source excitation Raman spectroscopy |
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