CN201173821Y - Spectrometer wavelength scanning mechanism - Google Patents
Spectrometer wavelength scanning mechanism Download PDFInfo
- Publication number
- CN201173821Y CN201173821Y CNU2008200716670U CN200820071667U CN201173821Y CN 201173821 Y CN201173821 Y CN 201173821Y CN U2008200716670 U CNU2008200716670 U CN U2008200716670U CN 200820071667 U CN200820071667 U CN 200820071667U CN 201173821 Y CN201173821 Y CN 201173821Y
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- CN
- China
- Prior art keywords
- cam
- fork
- guide rod
- scanning mechanism
- guide slot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a wavelength scanning mechanism in a spectrometer, which comprises an optical grating arranged on a rotating shaft penetrating the shell body, a swing stem penetrating the rotating shaft end, a cam butting the outer margin of a roller at the lower end of the swing stem, and electric motor connected with the cam in a driving way. The upper end of the swing stem is connected on the shell body through a tension spring, one side of the cam is provided with a guide slot along the inside of the outline thereof, the lower end of the sing stem is fixedly provided with a guide rod which is inserted in the guide slot of the cam and slides along the guide slot. When the scanning mechanism of the utility model scans wavelength, the guide rod does not touch any part of the cam. When external vibration and shock exist, because the guide rod and the guide slot limit the slight relative movement of the swing stem and the cam, even if external vibration and shock exist, the cam is not damaged due to the knock of the swing stem.
Description
Technical field
The utility model relates to the Wavelength scanning mechanism in the spectral instrument, especially a kind of cam swing formula Wavelength scanning mechanism.
Background technology
In many spectrometers, adopt cam and fork as Wavelength scanning mechanism, this mechanism by the cam that is arranged on grating or prism on the turning axle that is placed through in the housing, is set in fork on this rotation axle head, connects with roller outer rim on the fork lower end, drive the motor that is connected with cam and form, the upper end of fork is connected on the housing by an extension spring.The rotation of motor-driven cam drives grating or prism rotation realization length scanning by fork.
Owing to do not have other mutual alignment restriction between cam and fork, when instrument carried out length scanning, the side that fork and cam can take place when meeting vibration was touched, and influences measuring accuracy.
In addition, the precision of the cam profile that when transport equipment, needs protection, thereby the measuring accuracy of assurance instrument.Owing to only rely on the extension spring power on fork one end that the roller of the fork other end is resisted against on the cam, have relative motion in equipment transportation cam and fork, produce bigger impulsive force, make cam impaired easily.
Summary of the invention
The purpose of this utility model is the fault of construction that exists for the Wavelength scanning mechanism that overcomes in the present spectral instrument, the Wavelength scanning mechanism in a kind of spectrometer of proposition improvement structure.
Wavelength scanning mechanism in a kind of spectrometer of the utility model, the cam that comprises the grating that is arranged on the turning axle that is placed through in the housing, is set in fork on this rotation axle head, connects with roller outer rim on the fork lower end, drive the motor that is connected with cam, the upper end of described fork is connected on the housing by an extension spring, have guide groove in its outer contour inboard, upper edge, described cam one side, set firmly a guide rod on described fork lower end, this guide rod is inserted in the guide groove of described cam and along guide groove and slides.
Characteristics of the present utility model are: adopt guide rod and guide groove to solve the problem that prior art cam and fork do not have fixation to bring, when instrument carried out length scanning, guide rod did not bump any position of cam.As external vibration, when impacting, because the restriction fork and the small relative motion of cam of guide rod and guide groove, even extraneous vibration, impact are arranged, can not make cam impaired because of knocking of fork yet, also can play position-limiting action when the guide rod in the guide groove is in being applied to space remote instrument simultaneously.Therefore the utility model has guaranteed the precision of cam profile, has also guaranteed the measuring accuracy of spectral instrument, and a kind of Wavelength scanning mechanism that earthquake counter measure are suitable for the special occasions use that has also is provided.The utility model can be used for space flight and aviation technical field and occasion that some are special.
Description of drawings
Fig. 1 is the structural representation of Wavelength scanning mechanism of the present utility model;
Fig. 2 is the structure structural representation of the cam 6 shown in Fig. 1;
Fig. 3 is that A shown in Figure 1 is to partial schematic diagram.
Embodiment
The embodiment that provides below in conjunction with accompanying drawing is described in further detail the utility model structure.
Only shown in Figure 3 with reference to Fig. 1, Wavelength scanning mechanism in a kind of spectrometer, the cam 7 that comprises the grating 5 that is arranged on the turning axle that is placed through in the housing, is set in fork 3 on this rotation axle head, connects with roller 1 outer rim on fork 3 lower ends, drive the motor 6 that is connected with cam 7, the upper end of described fork 3 is connected on the housing by an extension spring 4, have guide groove 8 in its outer contour inboard, upper edge, described cam 7 one side, set firmly a guide rod 2 on described fork 3 lower ends, this guide rod 2 is inserted in the guide groove 8 of described cam 7 and along guide groove 8 and slides.
When drive motor 6 drives cam 7 rotations, roller 1 on the fork 3 abuts against on cam 7 profiles, and guide rod 2 is synchronized with the movement with roller 1 along the guide groove 8 on cam 7 sides, and fork 3 drives grating 5 and rotates, the grating 5 and the angle of its incident light are changed, finish the scanning work of wavelength.Simultaneously, when cam 7 motions, extension spring 4 contacts the roller 1 on the fork 3 by elastic force fully with cam 7, makes the outer contour motion of roller 1 in strict accordance with cam 7.Adopt guide rod 2 and guide groove 8 to solve the problem that cam 7 and fork 3 do not have fixation to bring, when instrument carried out length scanning, fork 3 did not bump any position of cam 7.As external vibration, when impacting, because the small relative motion of the restriction of guide rod 2 and guide groove 8 and fork 2 and cam 6 even extraneous vibration, impact are arranged, can not make cam 7 impaired because of knocking of fork 3 yet.Therefore guarantee the precision of cam 7 profiles, also guaranteed the measuring accuracy of spectral instrument.
Claims (1)
1. the Wavelength scanning mechanism in the spectrometer, comprise the grating (5) that is arranged on the turning axle that is placed through in the housing, be set in the fork (3) on this rotation axle head, the cam (7) that connects with roller (1) outer rim on fork (3) lower end, drive the motor (6) that is connected with cam (7), the upper end of described fork (3) is connected on the housing by an extension spring (4), it is characterized in that, its outer contour inboard, upper edge, a side at described cam (7) has guide groove (8), set firmly a guide rod (2) on described fork (3) lower end, this guide rod (2) is inserted in the guide groove (8) of described cam (7) and along guide groove (8) and slides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200716670U CN201173821Y (en) | 2008-04-10 | 2008-04-10 | Spectrometer wavelength scanning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200716670U CN201173821Y (en) | 2008-04-10 | 2008-04-10 | Spectrometer wavelength scanning mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201173821Y true CN201173821Y (en) | 2008-12-31 |
Family
ID=40200948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200716670U Expired - Fee Related CN201173821Y (en) | 2008-04-10 | 2008-04-10 | Spectrometer wavelength scanning mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201173821Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724916A (en) * | 2018-12-18 | 2019-05-07 | 中国科学院国家天文台南京天文光学技术研究所 | Positioning and clamping mechanism equipped with flexible contact link spectrometer pattern switching |
-
2008
- 2008-04-10 CN CNU2008200716670U patent/CN201173821Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724916A (en) * | 2018-12-18 | 2019-05-07 | 中国科学院国家天文台南京天文光学技术研究所 | Positioning and clamping mechanism equipped with flexible contact link spectrometer pattern switching |
| CN109724916B (en) * | 2018-12-18 | 2021-07-13 | 中国科学院国家天文台南京天文光学技术研究所 | Positioning and clamping mechanism with flexible contact link for spectrometer mode switching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20100410 |