CN201837457U - Spectrophotometer with grating adjusting structure - Google Patents
Spectrophotometer with grating adjusting structure Download PDFInfo
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- CN201837457U CN201837457U CN2010205126925U CN201020512692U CN201837457U CN 201837457 U CN201837457 U CN 201837457U CN 2010205126925 U CN2010205126925 U CN 2010205126925U CN 201020512692 U CN201020512692 U CN 201020512692U CN 201837457 U CN201837457 U CN 201837457U
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- grating
- adjustment structure
- swivel base
- spectrophotometer
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Abstract
The utility model provides a spectrophotometer with a grating adjusting structure, which comprises a first grating, a second grating and a grating rotating seat, wherein the grating swivel base comprises a left L-shaped first adjusting structure and a right L-shaped second adjusting structure, the upper parts of the first adjusting structure and the second adjusting structure are connected with each other through a longitudinal slot, the lower part of the first adjusting structure is connected with the lower part of the grating rotating seat through a first horizontal slot, the lower part of the second adjusting structure is connected with the lower part of the grating rotating seat through a second horizontal slot, the first horizontal slot is provided with a first threaded hole for installing a screw and a first top thread hole for installing a top thread, and the second horizontal slot is provided with a second threaded hole for installing the screw and a second top thread hole for installing the top thread. The spectrophotometer not only can realize the fixing and simultaneous adjustment of two gratings, but also has the characteristics of firm fixing, simple structure, convenience in adjustment and the like.
Description
Technical field
The utility model relates to grating regulation technology field, particularly a kind of spectrophotometer with grating adjustment structure.
Background technology
Spectrophotometer is an absorption of utilizing the light of the molecule of material or a certain wavelength coverage of ion pair, the instrument that material is carried out qualitative analysis, quantitative test and structure analysis.
Spectrophotometer is divided into ultraviolet spectrophotometer, visible spectrophotometer, ultraviolet-visible spectrophotometer, infrared spectrophotometer by light absorbing wavelength region may difference; By light absorbing physical property branch, can be divided into molecule absorption spectrophotometer and atomic absorption spectrophotometer (AAS).
All be provided with monochromator in the most spectrophotometer, and the dispersion element in the most monochromator all adopts grating, so grating also is the core parts in the spectrophotometer with branch light action.But in actual process, be difficult to reach the fixing high-precision requirement of grating, so the fixing and governor motion of grating just need be set.
In Chinese patent " a kind of liquid chromatograph " (patent No.: 200920246579.4), proposed a kind of liquid chromatograph, comprised by grating module 1 and grating and adjust the grating fixed mount that swivel base 2 is formed with grating fixed mount with grating fixed mount.
As shown in Figure 1, grating module 1 is adhesively fixed by grating 11 and grating seat 12 and is formed by connecting, and described grating seat 12 is provided with the groove 13 that bonding grating is used.
As shown in Figure 2, it is the inverted T-shape bearing of being made up of plummet support arm 21 and horizontal mounting arm 22 that grating is adjusted swivel base 2, the plummet support arm 21 of this inverted T-shape bearing is provided with the grating seat and adjusts hole 23, this grating seat is adjusted the axially consistent with the brachium direction of horizontal mounting arm 22 of hole 23, and this grating seat is adjusted hole 23 and is radially had horizontal opening 24, as shown in Figure 3, the threaded hole 26 of vertical described horizontal opening 24 mounting screws 25 on plummet support arm 21; As shown in Figure 4, can adjust along rotation and axial two degree of freedom of grating line direction grating.
As shown in Figure 3, one end of described horizontal mounting arm 22 has horizontal opening 27, be provided with the threaded hole 29 of the mounting screw of two vertical-horizontal openings in the brachium direction of the horizontal mounting arm end upper edge horizontal mounting arm with horizontal opening 27, the end face on the upper shed limit of described horizontal opening 27 is along the brachium direction of the horizontal mounting arm magnet 4 that bonds.As shown in Figure 5, the mounting screw 28 of two vertical-horizontal openings can be adjusted the luffing angle of grating.
Grating fixed mount of the prior art can only be realized the fixing of a grating and regulate, and but can not realize the fixing of two blocks of gratings and regulate simultaneously.
Summary of the invention
Fundamental purpose of the present utility model is to solve problems of the prior art, and a kind of spectrophotometer with grating adjustment structure that can realize regulating simultaneously two blocks of gratings is provided.
Spectrophotometer of the present utility model, comprise one first grating, one second grating and a grating swivel base, described first grating is fixedlyed connected with described grating swivel base with described second grating, described grating swivel base is the word of falling a T structure, described first grating and described second grating are installed in parallel in the top of described grating swivel base back-to-back, described grating swivel base comprises first adjustment structure that is left L type and second adjustment structure that is right L type, described first adjustment structure is connected with described first grating, described second adjustment structure is connected with described second grating, described first adjustment structure is connected by a vertical fluting on top with described second adjustment structure, the bottom of described first adjustment structure is connected with the bottom of described grating swivel base by one first transversal slotting, the bottom of described second adjustment structure is connected with the bottom of described grating swivel base by one second transversal slotting, described first transversal slotting is provided with first threaded hole of mounting screw and first top wire hole of jackscrew is installed, and described second transversal slotting is provided with second threaded hole of mounting screw and second top wire hole of jackscrew is installed.
At spectrophotometer described in the utility model, first gib screw that the top of described first adjustment structure can have first mounting hole and cooperate with it, second gib screw that the top of described second adjustment structure can have second mounting hole and cooperate with it, described first gib screw is fixed on described first grating in described first mounting hole, and described second gib screw is fixed on described second grating in described second mounting hole.
Spectrophotometer described in the utility model except can realizing the fixing of two gratings and regulating simultaneously, also has characteristics such as fixation, simple in structure and convenient adjusting.
Description of drawings
Fig. 1 is the structural representation that grating is connected with the grating seat in the prior art;
Fig. 2 is the structural representation that grating is regulated swivel base in the prior art;
Fig. 3 is the structural representation that grating module and grating are regulated swivel base in the prior art;
Fig. 4 is along the synoptic diagram of the adjustment of the rotation of grating line direction and axial two degree of freedom in the prior art;
Fig. 5 is the synoptic diagram that the pitch angle degree of grating in the prior art is regulated;
Fig. 6 is the structural representation of the utility model medium ultraviolet spectrophotometer 3.
Fig. 7 is the detailed structure synoptic diagram of ultraviolet spectrophotometer 3.
Fig. 8 is structural representation Fig. 1 of grating module 406 and rotating module 407.
Fig. 9 is first grating 501 and the structural representation of second grating 502 in preceding monochromator.
Figure 10 is the synoptic diagram of various variable relations relevant with computed range h.
Figure 11 is structural representation Fig. 2 of grating module 406 and rotating module 407.
Figure 12 is structural representation Fig. 3 of grating module 406 and rotating module 407.
Embodiment
Following mask body is introduced preferred forms of the present utility model.
As shown in Figure 3, ultraviolet spectrophotometer 3 comprises light source 301, preceding monochromator 302, main monochromator 303, beam splitting system 304, sample cell 305, reference cell 306, photoelectric detector 307 and data handling system 308.
As shown in Figure 4, light source 301 is made up of deuterium lamp 401, tungsten lamp 402 and condenser 403.Deuterium lamp 401 provides the complex light of 190nm-400nm wave band, and tungsten lamp 402 provides the complex light of 400nm-2500nm wave band.In the present embodiment, use the complex light of wave band, therefore adopt the mode of deuterium tungsten lamp combination as 190nm-900nm.The main effect of condenser 403 is the inlet that the diverging light that deuterium lamp 401 or tungsten lamp 402 send is converged to preceding monochromator 302.Condenser 403 can be rotated by a driven by motor, can realize the switching of deuterium lamp 401 and tungsten lamp 402 by the angle of rotating condenser 403.
Preceding monochromator 302 mainly is made up of entrance slit 404, collimating mirror 405, grating module 406, rotating module 407, condenser 408 and exit slit 409.Entrance slit 404 is mainly used in the beam size that restriction light source 301 incides preceding monochromator 302; Collimating mirror 405 mainly is collimated into directional light to the diverging light of incident, shines grating module 406 then.Because the branch light action of grating module 406, the monochromatic light of grating module 406 outgoing is different wave length directional lights by the different angles outgoing, and monochromatic light converges to exit slit 409 through condenser.Grating module 406 is driven and can be rotated by rotating module 407, angle by rotating shutter module 406 can make the optical convergence of different wave length to exit slit 409, grating corner and wavelength corresponding relation are followed grating rotation equation m λ=2dcos (γ/2) sin ω, wherein m is that level is inferior, λ is a wavelength, d is an incisure density, and γ is the angle of incident light and emergent light, and ω is the rotational angle of grating.
Shown in Figure 4 and 5, in the present embodiment, the light that is sent by light source 301 incides on the grating module 406 through entrance slit 404, collimating mirror 405, grating module 406 is driven by rotating module 407 and rotates, and makes the exit slit 409 of the optical convergence of different wave length to preceding monochromator 302 by the rotating shutter angle.Grating module 406 is made up of first grating 501 and second grating 502, and rotating module 407 is made up of grating swivel base 503 and stepper motor 504.First grating 501 and second grating 502 are separately fixed on the grating swivel base 503, and stepper motor 504 is fixedlyed connected with grating swivel base 503, drive grating swivel base 504 and rotate.In this example, adopting the wave band of complex light is 190nm-900nm, so selecting the blaze wavelength of first grating 501 is 250nm, the blaze wavelength of second grating 502 is 800nm, and the wavelength switching that grating is set is 380nm, promptly first grating 501 is used to receive the light of wavelength between 190-380nm, and second grating 502 is used to receive the light of wavelength between 380-900nm.Simultaneously, also be provided with a magnet 509 in the bottom of grating swivel base 503, be provided with a Hall element on the next door of grating swivel base 503, the setting of magnet 509 and Hall element is in order to realize the accurate location of grating rotating.Ultraviolet spectrophotometer 3 is after start, at first need to carry out self check, during self check, grating rotates earlier, when Hall element is sensed magnet 509, the Control Software of system is given tacit consent to the initial position that this position is a grating swivel base 503, grating turns an angle then, carry out scanning among a small circle, scan the position of energy stepper motor 504 of wavelength correspondence when the highest, and the Be Controlled software records gets off, and the position of the stepper motor 504 of these two wavelength correspondences has been arranged, and the position of the stepper motor 504 of other wavelength correspondence just can calculate out.After self check was finished, Control Software was noted two corresponding motor positions of grating different wave length.When instrument was worked, grating can be selected according to the wavelength that the user selects by system, and this grating rotating is arrived corresponding position, is used to receive the complex light of light source outgoing.
As shown in Figure 5, in the present embodiment, grating swivel base 503 is the word of falling T structure, and the top of the word of falling T structure has upright back structure 505, the first gratings 501 and second grating 502 is bonded in the top of founding back structure 505 back-to-back.The bottom of grating swivel base 503 word of falling T structures has a syndeton 507 that is used to connect stepper motor rotating shaft 506, comprise a rotating shaft fixed orifice and a jackscrew fixed sturcture 508, jackscrew fixed sturcture 508 comprises four jackscrew locking mechanisms, at the four sides of syndeton 507 rotating shaft 506 and grating swivel base 503 are locked respectively, make them fixedly connected.
As shown in Figure 6, and, in the present embodiment, first grating 501 and second grating 502 central shaft and the machine shaft 506 horizontal range h that staggers, the calculation procedure of h is as follows:
Through calculating h '=L * tan ω-(L/cos ω-L) * sin (V/2)/cos (V/2-ω), as shown in Figure 7, L is the vertical range of motor shaft and grating face, and ω is the corner of grating face, be the perpendicular line of grating face and the angle of surface level, V/2 is half of grating angle.In the present embodiment, the wavelength coverage of system's regulation is 190nm-900nm, grating adopts 1 grade of spectrum, the incisure density of grating is 1200 lines/mm, according to grating equation m λ=2dcos (γ/2) sin ω, i.e. m=1, d=1200 line/mm, γ=V, λ=380～900nm brings formula into and calculates ω between 3.5 °～21 °.H2 ' in the time of can obtaining first grating 501 or second grating 502 minimum corner ω=ω 2=3.5 ° thus, the h1 ' during hard-over ω=ω=21 °, the final reckoning obtains h=(h1 '+h2 ')/2.When ω＜30 °, so h ' ≈ L * tan ω is h ≈ L * (tan ω 1+tan ω 2)/2.And the minimum widith that can draw the grating face is D0+h1 '-h2 '.
When first grating 501 and second grating 502 do not stagger and be parallel to each other when placing, if the area of grating face is big inadequately, so when grating turns to certain angle, light on grating one side will overflow, and the another side of grating does not use, therefore luminous energy can reduce, and the light that exposes can become parasitic light, influences system index; If adopt the method that increases area of raster, can increase cost again.So in the utility model, with the placement of staggering of two blocks of gratings, and the angle and the other system designing requirement of rotating by grating, derive the distance that staggers with respect to machine shaft in two grating centers, in this distance that staggers, neither can produce light leak, also can make full use of the grating face, and need not increase the area of grating face, save cost.
As shown in Figure 8, grating swivel base 503 is provided with first adjustment structure 803 of left L type and second adjustment structure 804 of right L type, first adjustment structure 803 is connected with first grating 501, second adjustment structure 804 is connected with second grating 502, have vertical fluting 805 between first adjustment structure 803 and second adjustment structure 804, have first transversal slotting 806 between the bottom of first adjustment structure 803 and the grating swivel base 503, have second transversal slotting 807 between the bottom of second adjustment structure 804 and the grating swivel base 503, first transversal slotting 806 is provided with first threaded hole 808 of mounting screw and first top wire hole 809 of jackscrew is installed, second transversal slotting 807 is provided with second threaded hole 810 of mounting screw and second top wire hole 811 of jackscrew is installed, adjusting by screw and jackscrew makes first transversal slotting 806, second transversal slotting 807 and vertically fluting 805 generation mechanically deforms, change the size in fluting gap, realize the adjusting of grating pitch angle degree.For example, when tightening screw, can reduce the gap of transversal slotting, strengthen the vertically gap of fluting, the angle of depression of grating is strengthened, same, in the time of the rotation jackscrew, can strengthen the gap of transversal slotting, reduce the vertically gap of fluting, the elevation angle of grating is strengthened.And when having realized two gratings, 805 the existence of vertically slotting regulates.The length of vertical fluting 805, first transversal slotting 806 and second transversal slotting 807 is relevant with the pitch angle degree that width and grating need be regulated.
As Fig. 8 and shown in Figure 9, first adjustment structure 803 is provided with first mounting hole 801 and first gib screw 901, second adjustment structure 804 is provided with second mounting hole 802 and second gib screw 902, first grating 501 is provided with the grating stationary shaft that is used to install, the grating stationary shaft of first grating 501 is bonded in first mounting hole 801, and, make first grating 801 and 503 lockings of grating swivel base with the fluting gap of first gib screw, 901 fastening first mounting holes 801; In like manner, also be provided with the grating stationary shaft that is used to install on second grating 502, the grating stationary shaft of second grating 502 is adhered in second mounting hole 802, and, make second grating 802 and 503 lockings of grating swivel base with the fluting gap of second gib screw, 902 fastening second mounting holes 802.And for further fastening grating, be provided with the first fastening screw 813 in the side of first adjustment structure 803, be provided with second fastening screw 812, the first fastening screws 813 and the second fastening screw 812 in the side of second adjustment structure 804 further fastening with grating in the side by screw.
As further instruction, in the present embodiment, also can be with the parallel placement of the central shaft of grating with machine shaft, need to adopt the bigger grating of grating face this moment.
As further instruction, in the present embodiment, satisfying under the situation of machining precision, also can directly grating be adhered on the grating swivel base, perhaps other methods that grating can be fixed on the grating swivel base commonly used of this area.
As further instruction, in the present embodiment, satisfying under the situation of machining precision, if can guarantee that the optical axis of two gratings is parallel, groove is vertical, also can not adopt the adjustment structure of L type, directly grating is fixed on the grating seat, does not need to regulate.
As further instruction, in the present embodiment, also can L type adjustment structure be provided with a plurality of screws and jackscrew structure, be used to regulate the pitch angle of grating.
As further instruction, in the present embodiment, under the not high situation of resolution requirement, also can only adopt a monochromator to carry out beam split.
As further instruction, in the present embodiment, under the not high situation of system requirements, also can adopt the single beam light path, promptly only adopt a sample cell to come received signal, omit reference cell.
Above embodiment only is used to illustrate the utility model, but not is used to limit the utility model, and any not creative creation that persons skilled in the art are done according to above-mentioned design philosophy all should be considered as within the protection domain of this patent.
Claims (2)
1. the spectrophotometer with grating adjustment structure comprises one first grating, second grating and a grating swivel base, and described first grating is fixedlyed connected with described grating swivel base with described second grating,
It is characterized in that,
Described grating swivel base is the word of falling a T structure, described first grating and described second grating are installed in parallel in the top of described grating swivel base back-to-back, described grating swivel base comprises first adjustment structure that is left L type and second adjustment structure that is right L type, described first adjustment structure is connected with described first grating, described second adjustment structure is connected with described second grating, described first adjustment structure is connected by a vertical fluting on top with described second adjustment structure, the bottom of described first adjustment structure is connected with the bottom of described grating swivel base by one first transversal slotting, the bottom of described second adjustment structure is connected with the bottom of described grating swivel base by one second transversal slotting, described first transversal slotting is provided with first threaded hole of mounting screw and first top wire hole of jackscrew is installed, and described second transversal slotting is provided with second threaded hole of mounting screw and second top wire hole of jackscrew is installed.
2. spectrophotometer according to claim 1, it is characterized in that, first gib screw that the top of described first adjustment structure has first mounting hole and cooperates with it, second gib screw that the top of described second adjustment structure has second mounting hole and cooperates with it, described first gib screw is fixed on described first grating in described first mounting hole, and described second gib screw is fixed on described second grating in described second mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205126925U CN201837457U (en) | 2010-09-01 | 2010-09-01 | Spectrophotometer with grating adjusting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205126925U CN201837457U (en) | 2010-09-01 | 2010-09-01 | Spectrophotometer with grating adjusting structure |
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| CN201837457U true CN201837457U (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205126925U Expired - Lifetime CN201837457U (en) | 2010-09-01 | 2010-09-01 | Spectrophotometer with grating adjusting structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852167A (en) * | 2014-01-27 | 2014-06-11 | 烟台东方分析仪器有限公司 | Spectrograph flat-field full-spectrum receiving device |
| CN109491034A (en) * | 2018-10-11 | 2019-03-19 | 上海荣高电子科技有限公司 | A kind of grating adjustment mechanism |
| CN113703120A (en) * | 2021-09-06 | 2021-11-26 | 钢研纳克检测技术股份有限公司 | Back-to-back double-grating adjusting device and posture adjusting method |
| 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 |
-
2010
- 2010-09-01 CN CN2010205126925U patent/CN201837457U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852167A (en) * | 2014-01-27 | 2014-06-11 | 烟台东方分析仪器有限公司 | Spectrograph flat-field full-spectrum receiving device |
| CN103852167B (en) * | 2014-01-27 | 2016-03-30 | 烟台东方分析仪器有限公司 | Spectrometer flat field composes receiving trap entirely |
| CN109491034A (en) * | 2018-10-11 | 2019-03-19 | 上海荣高电子科技有限公司 | A kind of grating adjustment mechanism |
| CN109491034B (en) * | 2018-10-11 | 2023-04-18 | 烟台荣高数字科技有限公司 | Grating adjusting mechanism |
| CN113703120A (en) * | 2021-09-06 | 2021-11-26 | 钢研纳克检测技术股份有限公司 | Back-to-back double-grating adjusting device and posture adjusting method |
| CN113703120B (en) * | 2021-09-06 | 2024-01-30 | 钢研纳克检测技术股份有限公司 | Back-to-back double-grating adjusting device and posture adjusting method |
| 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 |
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| ASS | Succession or assignment of patent right |
Owner name: BEIJING RIGOL PRECISION INSTRUMENT TECHNOLOGY CO., Free format text: FORMER OWNER: BEIJING RIGOL TECHNOLOGIES, INC. Effective date: 20150902 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150902 Address after: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Patentee after: Beijing RIGOL Science and Technology Co., Ltd. Address before: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Patentee before: Beijing Rigol Technologies, Inc. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180109 Address after: Kolding road high tech Zone of Suzhou City, Jiangsu Province, No. 8 215163 Patentee after: SUZHOU RIGOL PRECISION ELECTRIC TECHNOLOGIES CO., LTD. Address before: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Patentee before: Beijing RIGOL Science and Technology Co., Ltd. |
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| TR01 | Transfer of patent right | ||
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Granted publication date: 20110518 Effective date of abandoning: 20200306 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20110518 Effective date of abandoning: 20200306 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |