CN2376623Y - Monochrometer - Google Patents
Monochrometer Download PDFInfo
- Publication number
- CN2376623Y CN2376623Y CN 99228653 CN99228653U CN2376623Y CN 2376623 Y CN2376623 Y CN 2376623Y CN 99228653 CN99228653 CN 99228653 CN 99228653 U CN99228653 U CN 99228653U CN 2376623 Y CN2376623 Y CN 2376623Y
- Authority
- CN
- China
- Prior art keywords
- grating
- slit
- steady arm
- monochromator
- utility
- 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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- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a monochrometer, which overcomes the deficiencies of long measuring period and large errors in the prior art. A constant speed motor which is provided with a positioner on the shaft is adopted to replace the original rotating device, and the inner part of a casing is provided with a photoelectric switch that is matched with the positioner. The utility model has the characteristics of short measuring period, high precision, simple structure, low cost, convenient operation and easy maintenance, and is especially suitable for online real-time monitoring systems.
Description
The utility model is a kind of monochromator.It belongs to the spectral measurement field, particularly relates to using grating measuring.
At present people the formation of grating monochromator commonly used be that an end of housing is equipped with entrance slit, exit slit and affixed and coaxial with its plane wheelwork with grating, this wheelwork is connected with stepper motor through gear train, and promoted by it, the other end of housing is equipped with the concave surface completely reflecting mirror, the focus of this catoptron lays respectively at entrance slit and exit slit place, and photomultiplier is positioned at the exit slit place.Weak point is that so measuring period is long, error is big, particularly is unfavorable for monitoring in real time the variation of tested spectrum because length scanning is to promote mechanical transmission mechanism with stepper motor to carry out.
The purpose of this utility model provide a kind of measure fast, error is little, the monochromator that can be used for real-time monitoring system.
The utility model is realized by following measure: directly overcome the stepper motor rotating speed as the wheelwork of grating with the uniform speed electric motor and cause measuring period long and avoid the sum of errors instability brought because of mechanical drive slowly.The uniform speed electric motor is better with the direct current generator of pawl utmost point permanent magnet synchronous AC machine or band current stabilization.Be provided with steady arm on the output shaft of motor, this steady arm matches with on-off element in the housing and obtains start signal when measuring.Steady arm is notched disk, will start this on-off element when this breach goes to the on-off element place.The optional optoelectronic switch of using of on-off element.For further shortening measuring period, grating can be selected two-sided grating for use.
The utility model has short, advantage of high precision measuring period compared to existing technology, is specially adapted to the application in the on-line real time monitoring system, and simple in structure in addition, cost is low, easy to use, the characteristics of easy care.
Describe concrete structure of the present utility model and working condition in detail below in conjunction with accompanying drawing.
Fig. 1 is a kind of basic structure synoptic diagram of the present utility model.
Fig. 2 is the elevational schematic view of Fig. 1.
With reference to Fig. 1, Fig. 2, one end of housing 3 be equipped with entrance slit 2, exit slit 7 and with grating 4 Joints and the uniform speed electric motor 10 coaxial with its plane, be equipped with notched disk steady arm 5 on 10 of the uniform speed electric motors, this steady arm 5 matches with optoelectronic switch as on-off element 9.The other end of housing 3 is equipped with the concave surface completely reflecting mirror 6 that focus lays respectively at entrance slit 2 and exit slit 7 places.Photomultiplier 8 is positioned at exit slit 7 places.
During use, incident light 1 shines on the concave surface completely reflecting mirror 6 by entrance slit 2, transfer it to directional light back reflection to plane grating 4 through concave surface completely reflecting mirror 6, by grating 4 again with its chromatic dispersion to concave surface completely reflecting mirror 6, incident light after the chromatic dispersion 1 is reflexed on the photomultiplier 8 at exit slit 7 places by mirror 6, be converted to corresponding electric signal output with light with surveyed wavelength.Rotating shutter 4 can be selected and recommended the light of different wave length to exit slit 7 places.The reference position of the wave spectrum of surveying is then determined by steady arm 5 and the on-off element that matches with it 9.
Claims (5)
1. monochromator, one end of housing (3) is equipped with that entrance slit (2), mountain are penetrated slit (7) and with grating (4) Joint and be equipped with focus with coaxial wheelwork, the other end in its plane and lay respectively at the concave surface completely reflecting mirror (6) that entrance slit (2) and exit slit (7) are located, photomultiplier (8) is positioned at exit slit (7) and locates, it is characterized in that wheelwork is the uniform speed electric motor (10) that steady arm (5) are arranged on the axle, be equipped with the on-off element (9) that matches with steady arm (5) in the housing (3).
2. monochromator according to claim 1 is characterized in that the direct current generator of uniform speed electric motor (10) for pawl utmost point permanent magnet synchronous AC machine or band current stabilization.
3. monochromator according to claim 1 is characterized in that steady arm (5) is notched disk.
4. monochromator according to claim 3 is characterized in that on-off element (9) is an optoelectronic switch.
5. monochromator according to claim 1 is characterized in that grating (4) is two-sided grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228653 CN2376623Y (en) | 1999-06-16 | 1999-06-16 | Monochrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228653 CN2376623Y (en) | 1999-06-16 | 1999-06-16 | Monochrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2376623Y true CN2376623Y (en) | 2000-05-03 |
Family
ID=34018000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99228653 Expired - Fee Related CN2376623Y (en) | 1999-06-16 | 1999-06-16 | Monochrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2376623Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478738C (en) * | 2006-02-24 | 2009-04-15 | 中国科学院半导体研究所 | Tunable laser filter |
| CN105352596A (en) * | 2015-12-09 | 2016-02-24 | 广州江元医疗科技有限公司 | Monochromatic light collection device |
-
1999
- 1999-06-16 CN CN 99228653 patent/CN2376623Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478738C (en) * | 2006-02-24 | 2009-04-15 | 中国科学院半导体研究所 | Tunable laser filter |
| CN105352596A (en) * | 2015-12-09 | 2016-02-24 | 广州江元医疗科技有限公司 | Monochromatic light collection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |