CN204479181U - A kind of parallel double grating monochromator - Google Patents
A kind of parallel double grating monochromator Download PDFInfo
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- CN204479181U CN204479181U CN201520162720.8U CN201520162720U CN204479181U CN 204479181 U CN204479181 U CN 204479181U CN 201520162720 U CN201520162720 U CN 201520162720U CN 204479181 U CN204479181 U CN 204479181U
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Abstract
The utility model discloses a kind of parallel double grating monochromator and comprise framework, this framework is provided with the first grating and second grating of parallel setting, framework is provided with a rotation axis; Also comprise the Sine Driving Mechanism for driving described first grating and described second grating coaxial rotation, described Sine Driving Mechanism and described rotation axis are in transmission connection.Said structure of the present utility model makes Sine Driving Mechanism when driving rotation axis to rotate, and rotation axis drives framework unitary rotation, thus the first grating making simultaneously to be arranged on framework and the second grating rotate simultaneously, and synchronously rotates.Therefore the first grating of the present utility model and the second grating reach the effect of synchronous axial system, and under equal sweep velocity, during all band scanning, measuring speed is doubled than single grating; Also make the monochromatic wavelength coverage expansion separated be twice spectral power distribution even simultaneously.
Description
Technical field
The utility model relates to spectrometric instrument technical field, particularly relates to a kind of parallel double grating monochromator.
Background technology
Grating monochromator is a kind of optical instrument photon energy or wavelength being carried out to high resolution analysis and selection, is integration spectrum analysis and the surveying instrument of optics and the research of optoelectronic areas subordinate.Grating monochromator utilizes grating as beam splitter, and the complex light of incidence is decomposed into the full wave monochromatic light very narrow for optional spectral width of distribution, namely grating monochromator is decomposed into a series of highly purified monochromatic instrument complex light exactly.According to the feature of the monochromatic source that grating monochromator produces, use it for the qualitative and quantitative analysis to transparency material and solution.The advantage of grating monochromator is the wide ranges of wave band, and at all band dispersion uniform, monochromatic wavelength can reach degree very accurately.
But grating monochromator in use, sometimes need polylith grating, or need often to change grating.In order to solve the problem, at present two simple monochromators be together in series, constitute double monochromator.In double monochromator, every platform monochromator has respective dispersion system, has certain dispersive power.Two monochromator associated working, can have the array mode that two kinds different: system is subtracted each other in dispersion phase adding system and dispersion.Adopt the double monochromator of dispersion phase adding system can obtain larger total dispersion rate; The double monochromator adopting dispersion to subtract each other is then just in order to obtain more the monochromatic light of " pure " and suppress parasitic light.The double monochromator that dispersion is added, when scanning, must ensure the dynamic conformance of two monochromators, normally adopts a mechanism to control the related activities of two monochromators.Because slightly different, then the light beam be decomposed just all from exit slit injection, even all can not be blocked by middle slit.
The driving mechanism of the double monochromator of current employing is mostly: interlock sine mechanism or synchronously drive sine mechanism.Above-mentioned two kinds of sine mechanisms generally include two sine arm, and two sine arm and two gratings are in transmission connection one to one and arrange; So latter two sine arm is driven by a driver part simultaneously, makes two grating synchronizing movings.But no matter how high precision is, the mobile of two gratings always has error to exist, and have impact on the synchronism of two gratings, can not obtain more the monochromatic light of " pure ", can not suppress parasitic light.
Utility model content
The purpose of this utility model is to provide a kind of parallel double grating monochromator, two grating synchronisms of this double grating monochromator are good, obtain more the monochromatic light of " pure ", also well inhibit parasitic light, spectral energy under all band is scanned is corresponding smooth, thus improves measuring speed.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of parallel double grating monochromator comprises framework, and described framework is provided with the first grating and second grating of parallel setting, described framework is provided with a rotation axis; Also comprise the Sine Driving Mechanism for driving described first grating and described second grating coaxial rotation, described Sine Driving Mechanism and described rotation axis are in transmission connection.
Optimal way is, has phase angle difference between described first grating and described second grating.
Optimal way is, the blaze wavelength of described first grating is different with the blaze wavelength of described second grating.
Optimal way is, described Sine Driving Mechanism comprises a sine arm, one end and the described rotation axis of described sine arm are in transmission connection, and the other end of described sine arm and a sine mechanism jacking block are in transmission connection, and the output shaft of described sine mechanism jacking block and a stepper motor is in transmission connection.
Optimal way is, described sine mechanism jacking block selects cam, and described cam is set on the output shaft of described stepper motor.
Optimal way is, described double grating monochromator also comprises the first entrance slit and first exit slit of corresponding described first grating, and the second entrance slit of corresponding described second grating and the second exit slit.
Optimal way is, described framework is rectangular frame, and described first grating and described second grating are arranged along the length direction of described framework is parallel, and described rotation axis is arranged along the Width of described framework.
After adopting technique scheme, the beneficial effects of the utility model are: because parallel double grating monochromator of the present utility model comprises framework, this framework is provided with the first grating and the second grating, and framework is provided with a rotation axis, said structure makes two blocks of gratings reach coaxial mounted object.The utility model also comprises the Sine Driving Mechanism for driving the first grating and the second grating coaxial rotation, and this Sine Driving Mechanism and rotation axis are in transmission connection.Sine Driving Mechanism of the present utility model is when driving rotation axis to rotate, and rotation axis drives framework unitary rotation, thus the first grating making simultaneously to be arranged on framework and the second grating reach the object of coaxial rotation, and synchronously rotates.Therefore the first grating of the present utility model and the second grating reach the effect of synchronous axial system, obtain more the monochromatic light of " pure ", also well inhibit parasitic light; Under equal sweep velocity, during all band scanning, measuring speed is doubled than single grating; Also make the monochromatic wavelength coverage expansion separated be twice spectral power distribution even simultaneously.
Owing to having phase angle difference between the first grating and the second grating, this structure makes the scanning wavelength of two blocks of gratings just be connected, thus expands spectral range.
Because the blaze wavelength of the first grating is different with the blaze wavelength of the second grating, this structure makes two blocks of gratings be equivalent to one piece of double balzed grating, when all band scans, spectral energy is responded more smooth.
Because Sine Driving Mechanism comprises a sine arm, one end and the rotation axis of this sine arm are in transmission connection, and the other end of this sine arm and a sine mechanism jacking block are in transmission connection, and the output shaft of this sine mechanism jacking block and a stepper motor is in transmission connection; The stepper motor of this structure is when rotating, and the output shaft of stepper motor drives sine mechanism jacking block to rotate together, and sine mechanism jacking block heads on sine arm and does sinusoidal motion, finally makes rotation axis with the first grating and the second grating synchronous axial system.
In sum, the first grating and the second grating are arranged on same framework by the utility model, and install a rotation axis on framework, make two blocks of gratings realize coaxial mounted structure; In order to reach coaxial rotation, the utility model is driven rotation by rotation axis by Sine Driving Mechanism, thus makes two blocks of gratings reach the object of coaxial rotation, thus obtains purer monochromatic light, improves measuring speed of the present utility model.And the utility model is by selecting the grating of not blaze wavelength, when the utility model all band is scanned, spectral energy response is more smooth.The utility model also allows the first grating and the second grating be arranged on the installation phase angle difference that after on framework, maintenance is certain, comes thus expands spectral range.
Accompanying drawing explanation
Fig. 1 is the structural representation of parallel double grating monochromator of the present utility model when being in working position;
Fig. 2 is the structural representation of parallel double grating monochromator of the present utility model when being in reference position;
Fig. 3 is the structural representation of parallel double grating monochromator of the present utility model when being in final position;
In figure: the 1-the first grating, the 2-the second grating, the 3-the first entrance slit, the 4-the first exit slit, the 5-the second entrance slit, the 6-the second exit slit, 7-sine arm, 8-sine mechanism jacking block, 9-stepper motor, 10-rotation axis, 11-framework.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, Figure 2 and Figure 3, a kind of parallel double grating monochromator comprises framework 11, and preferred framework 11 is rectangular frame.Also comprising parallel the first grating 1 and the second grating 2 arranged on the frame 11, two blocks of gratings of the present embodiment walk abreast along the length direction of framework 11 and arrange.Framework 11 is also provided with a rotation axis 10, the rotation axis 10 of the present embodiment is arranged along the Width of framework 11.Rotation axis 10 and a Sine Driving Mechanism of double grating monochromator of the present utility model are in transmission connection, namely rotation axis 10 is driven by Sine Driving Mechanism and does sinusoidal movement, and the movement of rotation axis 10 makes framework 11 along with moving together, finally make first grating 1 and second grating 2 coaxial rotation of simultaneously installing on the frame 11.
Sine Driving Mechanism comprises a sine arm 7, and one end and the rotation axis 10 of sine arm 7 are in transmission connection, and the other end of sine arm 7 and a sine mechanism jacking block 8 are in transmission connection.The output shaft of sine mechanism jacking block 8 and a stepper motor 9 is in transmission connection.Preferred sine mechanism jacking block 8 is cam, and cam is set on the output shaft of stepper motor 9.When the output shaft of stepper motor 9 is when rotating, cam is driven rotation, and the sine arm 7 be connected with cam drive is by sinusoidal mobile with doing, doing sinusoidal mobile together with the rotation axis 10 that sine arm 7 is in transmission connection, is finally that coaxial rotation occurs for the first grating 1 and the second grating 2.
Have phase angle difference between first grating 1 of the present embodiment and the second grating 2, this phasing degree official post first grating 1 and the second grating 2 have certain installation initial angle.And the scanning wavelength with two blocks of gratings of phase angle difference is just connected, thus expand the scope of spectrum.Preferably the initial angle of the first grating 1 is 200 °, and the initial angle of the second grating 2 is 600 °.The sweep limit of the first grating 1 is between 200 °-600 ° so again, and the sweep limit of the second grating 2 is between 600 °-1000 °, and clearly the first grating 1 and the second grating 2 are connected at 600 ° of places, thus improve measuring speed.
The blaze wavelength of first grating 1 of the present embodiment is different with the blaze wavelength of the second grating 2, and wherein blaze wavelength is the great wavelength that glitters in blazed grating corresponding to blazing angle for blaze wavelength, is also the strongest diffraction wavelength.The utility model is by selecting two blocks of gratings of different blaze wavelength, and make it be equivalent to one piece pair and glare, make when all band scans, spectral energy response is more smooth, expands the wavelength coverage of a times.
The double grating monochromator of the present embodiment also comprises the first entrance slit 3 and the first exit slit 4 of corresponding first grating 1 in addition, and the second entrance slit 5 and the second exit slit 6 of corresponding second grating 2.
When using the utility model to carry out the qualitative and quantitative analysis of transparency material and solution, the light beam that light source or illuminator send, be radiated at uniformly after above the first entrance slit 3 and the second entrance slit 5 simultaneously, after other optical elements, respectively by the first grating 1 and the second grating 2 light splitting, separate monochromatic light from the first exit slit 4 and the second exit slit 6 respectively.The stepper motor 9 of Sine Driving Mechanism of the present utility model starts work under control of the control system, can need to adjust rotating speed according to the measurement of control system.After stepper motor 9 rotates, sine mechanism jacking block 8 is by with rotating shaft, and sine mechanism jacking block 8 heads on sine arm 7 again and moves, and makes sine arm 7 do sinusoidal motion.Finally make rotation axis 10 also do sinusoidal motion, framework 11 is with the first grating 1 and the second grating 2 synchronously coaxial rotation to occur simultaneously.After coaxial rotation occurs for the first grating 1 and the second grating 2, occur from the first exit slit 4 and the second exit slit 6 monochromatic light being grown to long wavelength by shortwave successively, and monochromatic light is purer, parasitic light decreases.
Because the starting point and ending point of the first grating 1 of the present utility model and the second grating 2 is at same position, thus improve the speed of measurement.Two groups grating beam splitting is synchronous, precision is high, effective, what two gratings obtained is luminous energy superposition, realizes the bright higher monochromatic light of luminous energy.Therefore the utility model is compared to the monochromator be simply cascaded, and measuring speed is doubled, and wavelength coverage have also been enlarged one times.
The above preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, etc. same to walk abreast the improvement etc. of double grating monochromator structure, all should be included within protection domain of the present utility model.
Claims (7)
1. a parallel double grating monochromator, is characterized in that, comprises framework, and described framework is provided with the first grating and second grating of parallel setting, described framework is provided with a rotation axis; Also comprise the Sine Driving Mechanism for driving described first grating and described second grating coaxial rotation, described Sine Driving Mechanism and described rotation axis are in transmission connection.
2. parallel double grating monochromator according to claim 1, is characterized in that, has phase angle difference between described first grating and described second grating.
3. parallel double grating monochromator according to claim 1, is characterized in that, the blaze wavelength of described first grating is different with the blaze wavelength of described second grating.
4. parallel double grating monochromator according to any one of claim 1 to 3, it is characterized in that, described Sine Driving Mechanism comprises a sine arm, one end and the described rotation axis of described sine arm are in transmission connection, the other end of described sine arm and a sine mechanism jacking block are in transmission connection, and the output shaft of described sine mechanism jacking block and a stepper motor is in transmission connection.
5. parallel double grating monochromator according to claim 4, is characterized in that, described sine mechanism jacking block selects cam, and described cam is set on the output shaft of described stepper motor.
6. parallel double grating monochromator according to claim 5, it is characterized in that, described double grating monochromator also comprises the first entrance slit and first exit slit of corresponding described first grating, and the second entrance slit of corresponding described second grating and the second exit slit.
7. parallel double grating monochromator according to claim 1, is characterized in that, described framework is rectangular frame, and described first grating and described second grating are arranged along the length direction of described framework is parallel, and described rotation axis is arranged along the Width of described framework.
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| CN201520162720.8U CN204479181U (en) | 2015-03-21 | 2015-03-21 | A kind of parallel double grating monochromator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323762A (en) * | 2018-09-21 | 2019-02-12 | 中国科学院长春光学精密机械与物理研究所 | A kind of assembly system and method for concave grating double monochromator |
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- 2015-03-21 CN CN201520162720.8U patent/CN204479181U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323762A (en) * | 2018-09-21 | 2019-02-12 | 中国科学院长春光学精密机械与物理研究所 | A kind of assembly system and method for concave grating double monochromator |
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