CN207423364U - A kind of grating spectrograph - Google Patents
A kind of grating spectrograph Download PDFInfo
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- CN207423364U CN207423364U CN201721450525.0U CN201721450525U CN207423364U CN 207423364 U CN207423364 U CN 207423364U CN 201721450525 U CN201721450525 U CN 201721450525U CN 207423364 U CN207423364 U CN 207423364U
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- sensor array
- grating
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- lens
- mask filters
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Abstract
The utility model provides a kind of grating spectrograph, include entrance lens, grating, camera lens and the sensor array of the connection of light path successively, Mask filters are provided on the receiving plane of the sensor array, Mask filters can also arrange an imaging len with sensor array, which can absorb one or more strong spectral lines of nitrogen, oxygen, carbon dioxide and water.The utility model employs the design of Mask to inhibit the relatively strong signal of Raman light, and using the material of high-absorbility as coating, the light for reducing intense line to surrounding scatters, effectively reduces the influence of light scatteringband, improve the signal-to-noise ratio of spectrum Mask filters.
Description
Technical field
The utility model is related to spectrometer technical fields, and in particular to a kind of grating spectrograph.
Background technology
Grating spectrograph in existing design is using a piece of achromatic lens, holographic grating, camera lens and sensing
Device；Secondary color incident light, through achromatic lens, becomes parallel input light and enters holographic grating, then pass through holographic grating shape from slit
Into different wave length collimated light beam and be emitted with different angle of diffraction, the different positions of sensor are imaged on by camera lens
It puts, so as to record the luminous intensity of corresponding position.
From the matched of slit, grating to camera and sensor links, sensor is greatly improved to photon
Utilization rate so that the utilization rate of photon has reached more than 90%.Using the transmission mode of holographic grating, effectively reduce miscellaneous
Astigmatism improves diffraction efficiency and the resolution ratio of spectrum, and while working will not have ghost line and satellite line to generate.Since Raman is believed
In number there are a variety of strong spectral lines, when being analyzed using existing grating spectrograph Raman signal, can not remove or weaken
Strong spectral line, it will the analysis efficiency of spectrometer is caused to decline.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of grating spectrograph that can improve spectral signal-noise ratio,
Specific technical solution is as follows：
A kind of grating spectrograph includes entrance lens, grating, camera lens and the sensor array of the connection of light path successively,
Mask filters are provided on the receiving plane of the sensor array, the Mask filters can absorb or stop nitrogen, oxygen,
One or more strong spectral lines of carbon dioxide and water.
A kind of grating spectrograph includes entrance lens, grating, camera lens and the sensor array of the connection of light path successively,
Mask filters and imaging len are disposed in light path between the camera lens and sensor array, the Mask filter energy
Enough one or more strong spectral lines absorbed or stop nitrogen, oxygen, carbon dioxide and water.
Preferably, the entrance lens use achromatic lens.
From above technical scheme, the utility model employs the design of Mask to inhibit the relatively strong signal of Raman light,
Using the material of high-absorbility as coating, the light for reducing intense line to surrounding is scattered, effectively reduced scattered Mask filters
The influence of light belt is penetrated, improves the signal-to-noise ratio of spectrum.
Description of the drawings
Fig. 1 is the structure diagram of grating spectrograph embodiment 1；
Fig. 2 is the structure diagram of grating spectrograph embodiment 2；
Fig. 3 is the schematic diagram of Mask filters in the utility model.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, it is new this practicality is described in detail
Before the technical solution of each embodiment of type, involved noun and term are explained, in the present specification, title is identical
Or the identical component of label represents similar or identical structure, and it is only limitted to the purpose of signal.
Embodiment 1
As shown in Figure 1, the grating spectrograph includes entrance lens 10, grating 20, the camera lens of light path connection successively
30 and sensor array 40, achromatic lens may be employed in entrance lens.It is provided on the receiving plane of the sensor array 40
Mask filters 50, the Mask filters can absorb or stop the strong light of one or more of nitrogen, oxygen, carbon dioxide and water
Spectral line.Stronger Raman signal can be inhibited using Mask filters, which may be employed glass matrix, in glass
It rules on matrix, obstructs the peak value of strong spectral line, as shown in Figure 3.The engraved structure that metal back layer can also be used to be formed.
Embodiment 2
As shown in Fig. 2, the present embodiment and embodiment 1 difference lies in, the camera lens 30 and sensor array 40 it
Between light path on be disposed with Mask filters 50 and imaging len 60, Mask filters are separated with sensor array, are compared
In the grating spectrograph of embodiment 1, scattering light of the strong spectral line on Mask filters is by lens imaging in the non-of sensor
Imaging region and edge zone further reduce influence of the stray light to spectrum.
Embodiment described above is only that the preferred embodiment of the utility model is described, not to this practicality
New scope is defined, and on the premise of the spirit of the design of the utility model is not departed from, those of ordinary skill in the art are to this
The various modifications and improvement that the technical solution of utility model is made should all fall into the guarantor that claims of the utility model determine
In the range of shield.
Claims (3)
1. a kind of grating spectrograph includes entrance lens, grating, camera lens and the sensor array of the connection of light path successively,
It is characterized in that, Mask filters is provided on the receiving plane of the sensor array, which can absorb nitrogen, oxygen
One or more strong spectral lines of gas, carbon dioxide and water.
2. a kind of grating spectrograph includes entrance lens, grating, camera lens and the sensor array of the connection of light path successively,
It is characterized in that, Mask filters and imaging len is disposed in the light path between the camera lens and sensor array, it should
Mask filters can absorb or stop one or more strong spectral lines of nitrogen, oxygen, carbon dioxide and water.
3. grating spectrograph according to claim 1 or 2, which is characterized in that the entrance lens use achromatic lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721450525.0U CN207423364U (en) | 2017-11-02 | 2017-11-02 | A kind of grating spectrograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721450525.0U CN207423364U (en) | 2017-11-02 | 2017-11-02 | A kind of grating spectrograph |
Publications (1)
| Publication Number | Publication Date |
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| CN207423364U true CN207423364U (en) | 2018-05-29 |
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| CN201721450525.0U Active CN207423364U (en) | 2017-11-02 | 2017-11-02 | A kind of grating spectrograph |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2595936A (en) * | 2020-06-12 | 2021-12-15 | Is Instruments Ltd | Gas phase Raman instrument for the detection of gaseous species using a hollow core fibre |
-
2017
- 2017-11-02 CN CN201721450525.0U patent/CN207423364U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2595936A (en) * | 2020-06-12 | 2021-12-15 | Is Instruments Ltd | Gas phase Raman instrument for the detection of gaseous species using a hollow core fibre |
| GB2595936B (en) * | 2020-06-12 | 2023-03-29 | Is Instruments Ltd | Gas phase Raman instrument for the detection of gaseous species using a hollow core fibre |
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