CN201016804Y - Multiple grating rotating platform, monochrometer and spectrometer having the same - Google Patents
Multiple grating rotating platform, monochrometer and spectrometer having the same Download PDFInfo
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- CN201016804Y CN201016804Y CNU2007201039606U CN200720103960U CN201016804Y CN 201016804 Y CN201016804 Y CN 201016804Y CN U2007201039606 U CNU2007201039606 U CN U2007201039606U CN 200720103960 U CN200720103960 U CN 200720103960U CN 201016804 Y CN201016804 Y CN 201016804Y
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Abstract
The utility model discloses a multi-optical grating rotary table and a monochrometer and a spectrometer comprising a plurality of multi-optical grating rotary table; the multi-optical grating rotary table comprises a rotary table on which at least one optical grating is fixed by a fixing part; the optical grating is biased relative to the rotary table shaft or the center of the incidence beam path is not matched with the symmetric center of the optical grating but at a position where is biased from the optical grating center and one eighth to one second of the distance between optical gratings from one side of the optical grating. The monochrometer comprises a multi-optical grating rotary table and the center of the incidence beam path is not matched with the symmetric center of the optical grating but at a position where is biased from the optical grating center and one eighth to one second of the distance between optical gratings from one side of the optical grating; a cavity; the spectrometer comprises multi-optical grating rotary table and the center of the incidence beam path is not matched with the symmetric center of the optical grating but at a position where is biased from the optical grating center and one eighth to one second of the distance between optical gratings from one side of the optical grating; a cavity; a lightening system; a photoelectric exploring and gathering system. The utility model is characterized by a wide spectrum range, a simple structure, a small volume, convenient maintenance and debugging, low cost, etc.
Description
Technical field
The utility model relates to monochromator and spectrometer, particularly the many gratings turntable in monochromator or the spectrometer.
Background technology
Monochromator or spectrometer are the physics instruments of using always, can be used for producing monochromatic light or carry out spectral analysis.Its beam splitter commonly used is a grating, and the grating turntable is the device of carrying grating, is the core component of monochromator or spectrometer.
Grating turntable commonly used mainly contains three types:
One, monochromatic light grid coaxial type: grating turret axis of this type and grating ruling face are in the same plane, be the schematic top plan view of a grating turntable as shown in Figure 1, dashed circle is represented a turntable, motor and speed reducer structure (not shown) is arranged below the turntable, vertically fix a grating in the substantial middle position on turntable plane, like this when turntable rotates around the central shaft perpendicular to its table top, just driving grating rotates together, square frame is represented grating among the figure, the initial position of grating is represented in the residing position of solid line boxes, and the position after grating rotates is represented in the residing position of dashed rectangle.Two hatched example areas that dot-and-dash line limited are represented the light beam scope of incident among Fig. 1.As can be seen from Figure 1, under the two condition, the luminous energy of incident substantially all drops in the grating ruling face before grating rotates and after rotating, and the luminous energy waste is less.Monochromator the earliest or spectrometer all adopt this monochromatic light grid coaxial type turntable, and this monochromatic light grid coaxial type turntable is by long-time widespread use, and present monochromatic light grid monochromator both domestic and external is all taked such grating platform form mostly.But the shortcoming of this monochromatic light grid coaxial type grating turntable is: owing to can only place a grating, thereby spectral range is little, and range of application is narrow.
Two, many gratings abaxile: such grating turntable pivot center is not to be in the same plane with the grating ruling face, but with the grating ruling face certain distance is arranged beyond the grating ruling face, and pivot center is generally parallel with the grating ruling face.Be the schematic top plan view of the grating of grating abaxile more than one turntable as shown in Figure 2, dashed circle is represented a turntable, turntable is around perpendicular to its table top, be positioned at that the rotating shaft of home position can rotate, motor and speed reducer structure (not shown) is arranged below the turntable, on the turntable plane, vertically fix three gratings, and each grating is symmetrical with respect to rotating shaft, like this when turntable around perpendicular to the center of circle rotating shaft rotation of its table top the time, just driving grating rotates together, square frame is represented grating among the figure, the initial position of grating is represented in the residing position of solid line boxes, and the position after grating rotates is represented in the residing position of dashed rectangle.Two hatched example areas that dot-and-dash line limited are represented the light beam scope of incident among Fig. 2.As can be seen from Figure 2, thus owing to this structure can be placed the spectral range that the polylith grating enlarged whole instrument simultaneously and is used widely on same grating platform.But, the deficiency of such grating platform is: in actual applications along with the rotation of grating, effective application bore of light beam diminishes, grating scored part way face causes a large amount of light beams to waste with regard to can't accept whole incident beams after rotating, and therefore the effective energy of instrument output also significantly reduces, the light beam that can not be employed makes the parasitic light of instrument increase the overall performance of lowering apparatus again.When grating rotating arrived final position, the S district was a not application area of grating as shown in Figure 2, and the Q district is a not application area of light beam, and L is light beam practical application district.
Three, many gratings coaxial type: at the deficiency of second type of existence, there are two motors of employing to solve problem in the prior art, be that raster scanning adopts a motor, the another one motor is adopted in the grating conversion, Fig. 3 has represented the schematic top plan view of the grating of grating coaxial type more than turntable, wherein bigger solid line (or dotted line) circle is represented the grating fixed station, three blocks of gratings roughly become the triangular form vertical fixing on it, its center is a grating conversion motor shaft, grating conversion motor is fixed on (not shown) under the platform, each grating is symmetrical with respect to grating conversion motor shaft, thereby the grating fixed station is rotated the conversion of realization grating under the driving of conversion motor.When grating converts is needed grating when being in scanning position, and scan module starts and will drive the table top of being represented by less dashed circle and select and change realization raster scanning (scan module and speed brake setting are under scan table).Solid-line rectangle is represented the position that raster scanning is preceding among the figure, and dashed rectangle is the position behind the raster scanning.So grating conversion motor forwards required grating to the axle center of raster scanning platform earlier, is scanned by raster scanning driven by motor grating rotating again.Two hatched example areas that dot-and-dash line limited are represented the light beam scope of incident among Fig. 3.Though this type can solve the problem that makes full use of of luminous energy, reach and the identical effect of monochromatic light grid coaxial type grating turntable shown in Figure 1, but the structure of instrument, control section are all more complex, and cost also significantly rises, and two out-of-alignments rotate and also bring the difficulty of maintenance.
In view of the deficiency of above-mentioned prior art, just need a kind of improved many gratings turntable and comprise the monochromator and the spectrometer of this many gratings turntable.
The utility model content
The purpose of this utility model is to overcome in the prior art light beam waste and the big deficiency of veiling glare, provides a kind of and can place the polylith grating, spectral range is wide, and light beam utilization factor height, simple in structure, monochromator or many gratings of spectrometer turntable that cost is low.
In order to achieve the above object, the utility model is taked following technical scheme:
A kind of many gratings turntable comprises revolving-turret, fixes at least one grating by fixed part on this revolving-turret; Described grating is setovered with respect to the rotating shaft of described revolving-turret.
In technique scheme, further, the delineation face of described rotating shaft and described grating leaves, and is parallel to each other.
In technique scheme, further, comprise that also at least one is used to adjust the adjustment rack in orientation, described adjustment rack is fixed on the revolving-turret, and described fixed part is fixed to grating on the adjustment rack.
In technique scheme, further, described fixed part is fixed between 1/8 to 1/2 position of described raster width, or the input path center is in the symcenter of grating, counts position between 1/8 to 1/2 raster width but depart from the grating center in a side of grating.
In technique scheme, further, comprise a plurality of gratings, described a plurality of gratings are equally spacedly, are arranged on the described revolving-turret part of the polygon cylindrical lateral surface of each optical grating constitution with becoming polygon cylindricality.
In technique scheme, further, comprise three gratings.
In technique scheme, further, described grating is a curved surface grating.
A kind of monochromator that comprises above-mentioned many gratings turntable comprises:
Many gratings turntable of one or more gratings is installed on it, and described grating is to be fixed on described many gratings turntable by fixed part, and described grating is setovered with respect to the rotating shaft of described revolving-turret; Cavity, this cavity have the outlet that is used for that incident light incided the inlet of described grating and is used for emergent light output; Described many gratings turntable is installed in the described cavity, and incident light incides on the grating from described inlet, and reflected light is exported from described outlet;
In above-mentioned monochromator, further, the delineation face of described rotating shaft and described grating leaves, and is parallel to each other.
In above-mentioned monochromator, further, comprise that also at least one is used to adjust the adjustment rack in orientation, described adjustment rack is fixed on the revolving-turret, and described fixed part is fixed to grating on the adjustment rack.
In above-mentioned monochromator, further, described fixed part is fixed between 1/8 to 1/2 position of described raster width, or the input path center is in the symcenter of grating, counts position between 1/8 to 1/2 raster width but depart from the grating center in a side of grating.
In above-mentioned monochromator, further, described grating is a curved surface grating.
A kind of spectrometer that comprises above-mentioned many gratings turntable comprises: many gratings turntable of a plurality of gratings is installed on it, and described grating is to be fixed on described many gratings turntable by fixed part, and described grating is setovered with respect to the rotating shaft of described revolving-turret; Cavity, this cavity have the outlet that is used for that incident light incided the inlet of described grating and is used for emergent light output; Described many gratings turntable is installed in the described cavity, and incident light incides on the grating from described inlet, and reflected light is exported from described outlet; The illuminator of installing in described porch; Described exit install in photodetection and acquisition system; Fixed part is fixed between 1/8 to 1/2 position of described raster width, and perhaps the input path center is in the symcenter of grating, counts position between 1/8 to 1/2 raster width but depart from the grating center in a side of grating.
Compared with the prior art, advantage of the present utility model is:
The utility model had both kept the grating turntable in the prior art can place polylith grating, the wide advantage of spectral range, light beam waste and the big shortcoming of veiling glare have been overcome again, use a motor-driven turntable and just can finish the function of spectral scan and grating conversion, possessed simple in structure simultaneously, volume is little, maintenance and debugging are convenient, low cost and other advantages.Can reduce the size of grating to identical application beam size, reduce cost, to the grating of same size can expanded light beam effective range of application, improve the logical luminous energy of instrument, reduce parasitic light, improve the overall performance of instrument, and need not change other control circuits and the drive arrangements requirement of instrument, simple.
Description of drawings
Fig. 1 represents the schematic top plan view of the monochromatic light grid coaxial type grating turntable in the prior art;
Fig. 2 represents the schematic top plan view of the many gratings abaxile grating turntable in the prior art;
Fig. 3 represents the schematic top plan view of the many gratings coaxial type grating turntable in the prior art;
Fig. 4 represents that many gratings turntable of the present utility model can increase the schematic diagram of light beam and grating utilization factor;
Fig. 5 represents the schematic top plan view of many gratings turntable embodiment 1 of the present utility model;
Fig. 6 represents the schematic top plan view of many gratings turntable embodiment 2 of the present utility model;
Fig. 7 represents to contain monochromator embodiment 3 synoptic diagram of many gratings of the utility model turntable;
Fig. 8 represents to contain spectrometer embodiment 4 synoptic diagram of many gratings of the utility model turntable;
Fig. 9 represents to contain spectrometer embodiment 5 synoptic diagram of many gratings of the utility model turntable;
Figure 10 represents to contain spectrometer embodiment 6 synoptic diagram of many gratings of the utility model turntable.
The drawing explanation:
The 1-grating;
The 2-fixed part;
The 3-adjustment rack;
The 4-revolving-turret;
11-entrance slit group
12-plane mirror group
Many gratings of 13-turntable
The 14-first concave mirror group
The 15-second concave mirror group
16-exit slit group
The 17-casing
18-illuminator (light source)
19-first photodetection and acquisition system
20-optical path conversion mirror group
The 21-second exit slit group
22-second photodetection and acquisition system
The 23-CCD group
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Can make the structure of whole device, control section all more complex owing to adopt two or more motors to drive turntable and conversion grating, cost also significantly rises, so the utility model adopts a motor to realize spectral scan and grating conversion, and can allow simple in structurely, not make significantly and to change.In order to utilize luminous energy fully, the output energy of spectral instrument is increased, parasitic light reduces, will allow grating under the drive of turntable, turn an angle after still as much as possible being in the light beam district.Below the principle of work of monochromator is analyzed: the original position of grating is equivalent to 0 grade of diffraction, is complex light, can use 0 grade of this diffraction when instrument testing and calibration, and substantially need not in the time of the formal use of spectral instrument; Luminous energy during the grating original position is usually than higher, so should reduce to reduce veiling glare as far as possible.Grating is the most weak place of luminous energy when the final position that rotates, if the energy of final position can guarantee that the energy of so whole range of application is all no problem.Traditional way all is the beam energy when not losing the original position and beam energy when losing final position, at the deficiencies in the prior art, the utility model during by the grating original position light beam lose, and when final position, reduce light beam loss as far as possible, just can reach the effect of killing two birds with one stone, overcome the deficiencies in the prior art.
Embodiment 1
Make many gratings turntable of the present utility model as shown in Figure 5, revolving-turret 4 comprising circle, the drive motor (not shown) is installed below revolving-turret is used to drive turntable around rotating perpendicular to the turntable plane and through the rotating shaft in its center of circle, on this revolving-turret 4, fix at least one grid ratio as three gratings 1 such as fixed mount by fixed part 2, three gratings are equally spacedly, are arranged on the described revolving-turret part of each optical grating constitution triangle cylindrical lateral surface with becoming the triangle cylindricality; Also comprise the adjustment rack 3 of the orientation and the angle that are used to adjust grating, described adjustment rack 3 is fixed on the revolving-turret, and described fixed part is fixed to grating on the adjustment rack.Grating 1 is a plane grating, and the delineation face of described rotating shaft and described grating leaves, and is parallel to each other.Grating is setovered with respect to the rotating shaft of revolving-turret, that is to say, with respect to the grating that is fixed on perpendicular to the diameter of this grating on the turntable is asymmetric, such as diameter AB among the figure perpendicular to grating 1, and grating is asymmetric in diameter AB both sides on width, and all gratings all are to adopt identical bias mode.More satisfactory situation be fixed part be fixed on described raster width 1/8 to 1/2 such as between 1/3 position or light path center not in the symcenter of grating, and count from one side of grating 1/8 to 1/2 such as 1/3 raster width between, perhaps make the input path center not in the symcenter of grating, count 1/8 to 1/2 such as the position between 1/3 raster width in a side of grating but depart from the grating center.Certainly it will be apparent to those skilled in the art that several different gratings also not necessarily adopt the biasing of same degree fully, this will depend on the different sizes of spectral range and grating and decide.
The identical grating of three covers of present embodiment is fixed on conversion and the spectral scan of being carried out grating on the grating rotating platform 4 by driven by motor, because the parameters such as corner that the center fixed (or symmetrical form) of (or optical axis deviation form) and tradition symmetry does not change grating are fixed in the asymmetrical biasing of this patent, so when using instrument integral body be need not to do any other change, all algorithms are also all the same, should use very convenient.
Embodiment 2
As Fig. 6, present embodiment as different from Example 1, all gratings all adopt curved surface grating.
Other are with embodiment 1.
Embodiment 3
Make monochromator of the present utility model as shown in Figure 7, course according to light path is an order, comprising: the entrance slit group 11 of monochromator forms the inlet of light beam, the plane mirror group 12 of light path is used to turn back, the first concave mirror group 14 that is used to collimate, many gratings turntable 13 that embodiment 1 describes, the second concave mirror group 15 that is used for imaging, exit slit group 16 forms the outlet of light beam, wherein entrance slit group 11 and exit slit 16 are installed on the outer wall of casing 17 of monochromator, miscellaneous part is fixedly installed on casing 17 inside, the position of many gratings turntable 13 in cavity makes the input path center not in the symcenter of grating, counts 1/8 to 1/2 such as the position between 1/4 raster width but depart from the grating center in a side of grating.
Embodiment 4
As shown in Figure 8, make the utility model spectrometer, except the monochromator that embodiment 3 is comprised, also increased the illuminator 18 and first photodetection and acquisition system 19.Other is with embodiment 3.
Embodiment 5
As shown in Figure 9, make another embodiment of the utility model spectrometer, on the basis of embodiment 3, in casing, increased optical path conversion mirror group 20, on the outer wall of casing, increase by second output slit 21 and second photodetection and acquisition system 22, realize two kinds of outputs, enlarged investigative range.Other is with embodiment 3.
Embodiment 6
As shown in figure 10, make another embodiment of the utility model spectrometer, on the basis of embodiment 5, wherein one group of slot set 16 and photodetection acquisition system 19 are replaced with charge coupled device ccd group 23, realized two groups of outputs, one is to be exported through photodetection and acquisition system 22 by slot set 21 through optical path conversion mirror group 20; Another is taken a picture through CCD group 23 and exports in real time.Other is with embodiment 5.
By above several embodiment as can be seen: the utility model is under the prerequisite that adopts a motor, spectral scan just and grating conversion all are the central shaft rotations around the grating table top, abandoned the mode of grating center fixed in the conventional art, it is fixing to change the grating biasing into, make grating light beam when the original position that certain departing from be arranged,, do not use usually because the original position is the position of grating zero level, reduce the light beam range of application here, reach the purpose that reduces parasitic light.The light beam range of application does not have to reduce substantially after the grating rotating, guaranteed effective utilization of energy, when grating rotating arrived final position, the S district was a not application area of grating as shown in Figure 4, the Q district is a not application area of light beam, L is light beam practical application district, compares with Fig. 2, and it is big that the application area of light beam is obviously wanted, light beam not application area and grating application area is then obviously not little, the utilization factor that light beam and grating are described has all increased, and the output energy of instrument has also improved, and parasitic light also reduces simultaneously.
It should be noted last that above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (10)
1. grating turntable more than a kind comprises revolving-turret, fixes at least one grating by fixed part on this revolving-turret; It is characterized in that described grating is setovered with respect to the rotating shaft of described revolving-turret.
2. according to the described many gratings turntable of claim 1, it is characterized in that the delineation face of described rotating shaft and described grating leaves, and is parallel to each other.
3. according to the described many gratings turntable of claim 1, it is characterized in that comprise that also at least one is used to adjust the adjustment rack in orientation, described adjustment rack is fixed on the revolving-turret, described fixed part is fixed to grating on the adjustment rack.
4. according to the described many gratings turntable of claim 1, it is characterized in that, described fixed part is fixed between 1/8 to 1/2 position of described raster width, or the input path center is in the symcenter of grating, counts position between 1/8 to 1/2 raster width but depart from the grating center in a side of grating.
5. according to the described many gratings turntable of claim 1, it is characterized in that, comprise a plurality of gratings, described a plurality of gratings are equally spacedly, are arranged on the described revolving-turret part of the polygon cylindrical lateral surface of each optical grating constitution with becoming polygon cylindricality.
6. according to the described many gratings turntable of claim 5, it is characterized in that, comprise three gratings.
7. according to each described many gratings turntable of claim 1-6, it is characterized in that described grating is a curved surface grating.
8. monochromator that comprises the described many gratings turntable of claim 1 comprises:
Many gratings turntable of one or more gratings is installed on it, and described grating is to be fixed on described many gratings turntable by fixed part, it is characterized in that described grating is setovered with respect to the rotating shaft of described revolving-turret; Also comprise: cavity, this cavity have the outlet that is used for that incident light incided the inlet of described grating and is used for emergent light output; Described many gratings turntable is installed in the described cavity, the position of described many gratings turntable make incident light from described inlet incide on the grating, reflected light exports from described outlet, and the input path center is in the symcenter of grating, counts position between 1/8 to 1/2 raster width but depart from the grating center in a side of grating.
9. described according to Claim 8 monochromator is characterized in that, described fixed part is fixed between 1/8 to 1/2 position of described raster width.
10. spectrometer that comprises the described many gratings turntable of claim 1, comprise: many gratings turntable that a plurality of gratings are installed on it, described grating is to be fixed on described many gratings turntable by fixed part, it is characterized in that described grating is setovered with respect to the rotating shaft of described revolving-turret; Also comprise: cavity, this cavity have the outlet that is used for that incident light incided the inlet of described grating and is used for emergent light output; Described many gratings turntable is installed in the described cavity, and incident light incides on the grating from described inlet, and reflected light is exported from described outlet;
The illuminator of installing in described porch;
Described exit install in photodetection and acquisition system;
Fixed part is fixed between 1/8 to 1/2 position of described raster width, and perhaps the input path center is in the symcenter of grating, counts position between 1/8 to 1/2 raster width but depart from the grating center in a side of grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201039606U CN201016804Y (en) | 2007-03-23 | 2007-03-23 | Multiple grating rotating platform, monochrometer and spectrometer having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201039606U CN201016804Y (en) | 2007-03-23 | 2007-03-23 | Multiple grating rotating platform, monochrometer and spectrometer having the same |
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| Publication Number | Publication Date |
|---|---|
| CN201016804Y true CN201016804Y (en) | 2008-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201039606U Expired - Fee Related CN201016804Y (en) | 2007-03-23 | 2007-03-23 | Multiple grating rotating platform, monochrometer and spectrometer having the same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726359B (en) * | 2008-10-30 | 2011-09-28 | 北京信息科技大学 | Multiple-grating monochrometer and calibration method thereof |
| CN106595857A (en) * | 2016-12-21 | 2017-04-26 | 中国科学院长春光学精密机械与物理研究所 | Monochromatic light generating device |
| FR3050821A1 (en) * | 2016-04-27 | 2017-11-03 | Commissariat Energie Atomique | OPTICAL SPECTROMETER |
| CN108458784A (en) * | 2018-02-02 | 2018-08-28 | 乔士琪 | A kind of monochromator |
| CN109491073A (en) * | 2019-01-25 | 2019-03-19 | 程春丽 | A kind of optical filter |
| CN113985554A (en) * | 2021-11-12 | 2022-01-28 | 中国科学院长春光学精密机械与物理研究所 | Three-grating multi-azimuth attitude adjusting tower |
| CN114923419A (en) * | 2022-05-05 | 2022-08-19 | 西安应用光学研究所 | Self-calibration grating positioning device based on spatial light path and calibration method |
-
2007
- 2007-03-23 CN CNU2007201039606U patent/CN201016804Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726359B (en) * | 2008-10-30 | 2011-09-28 | 北京信息科技大学 | Multiple-grating monochrometer and calibration method thereof |
| FR3050821A1 (en) * | 2016-04-27 | 2017-11-03 | Commissariat Energie Atomique | OPTICAL SPECTROMETER |
| CN106595857A (en) * | 2016-12-21 | 2017-04-26 | 中国科学院长春光学精密机械与物理研究所 | Monochromatic light generating device |
| CN108458784A (en) * | 2018-02-02 | 2018-08-28 | 乔士琪 | A kind of monochromator |
| CN109491073A (en) * | 2019-01-25 | 2019-03-19 | 程春丽 | A kind of optical filter |
| CN109491073B (en) * | 2019-01-25 | 2021-06-15 | 深圳市捷迅光电有限公司 | Optical filter |
| CN113985554A (en) * | 2021-11-12 | 2022-01-28 | 中国科学院长春光学精密机械与物理研究所 | Three-grating multi-azimuth attitude adjusting tower |
| CN114923419A (en) * | 2022-05-05 | 2022-08-19 | 西安应用光学研究所 | Self-calibration grating positioning device based on spatial light path and calibration method |
| CN114923419B (en) * | 2022-05-05 | 2024-02-27 | 西安应用光学研究所 | Self-calibration grating positioning device and calibration method based on spatial light path |
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Granted publication date: 20080206 Termination date: 20140323 |