CN207366081U - Spectrograph - Google Patents
Spectrograph Download PDFInfo
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- CN207366081U CN207366081U CN201721397439.8U CN201721397439U CN207366081U CN 207366081 U CN207366081 U CN 207366081U CN 201721397439 U CN201721397439 U CN 201721397439U CN 207366081 U CN207366081 U CN 207366081U
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- grating
- ccd
- mirror
- concave mirror
- dichroscope
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- 230000003287 optical effect Effects 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 4
- 230000011514 reflex Effects 0.000 claims description 3
- 230000004446 light reflex Effects 0.000 claims description 2
- 238000010183 spectrum analysis Methods 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 description 10
- 239000006185 dispersion Substances 0.000 description 7
- 238000003384 imaging method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000004075 alteration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model provides a spectrograph relates to spectral analysis technical field. The spectrograph comprises a first concave reflecting mirror, a plane reflecting mirror, a dichroic mirror, a first grating, a second concave reflecting mirror, a first CCD, a second grating, a third concave reflecting mirror and a second CCD; after being collimated by the first concave reflector, the incident light is reflected to the dichroic mirror by the plane reflector; the short wave infrared band light reaching the dichroic mirror penetrates through the dichroic mirror, projects to a first grating, reaches the second concave reflecting mirror after being diffracted by the first grating, and is reflected to the first CCD by the second concave reflecting mirror; the ultraviolet visible near-infrared band light reaching the dichroic mirror is reflected to the second grating through the dichroic mirror, diffracted through the second grating, reaches the third concave reflecting mirror, and is reflected to the second CCD through the third concave reflecting mirror.
Description
Technical field
It the utility model is related to field of spectral analysis technology, more particularly to a kind of spectrograph.
Background technology
Spectrograph is in Atomic Emission Spectral Analysis, and the complex light of light source is decomposed into different ripples through dispersion after sample excitation
Long spectrum line, and the device recorded with photographic plate.In optics field, spectrograph is widely used.Existing market
On have the small focal length spectrographs of many original equipment manufacturer (abbreviation OEM) versions, its wavelength band has UV, visible light (abbreviation UV-
VIS) wave band and visible near-infrared (abbreviation VIS-NIR) wave band, but take the photograph spectral limit and cover ultraviolet short-wave infrared (abbreviation UV-
SWIR) spectrometer of wave band is also relatively difficult to achieve.Although there is producer to release UV-SWIR spectrographs successively in recent years, in scheme
The optical element difficulty of processing coefficient of use is high, of high cost, is unable to reach the effect of volume production.
For example, as shown in Figure 1, the UV-SWIR spectrographs released on the market at present, its incident light 101 pass through slit component
102 reach sphere collimating mirror 103；After the collimation projection of sphere collimating mirror 103, by the backside reflection of slit component 102 to two
To at Look mirror 104；At dichroscope 104, the light 105 of short-wave infrared is through dichroscope 104,106 and of short-wave infrared grating
After one group of first refractive lens group 107, it is focused on short-wave infrared focus planar detector 108；And at dichroscope 104, closely
The infrared and light of visible waveband 109 is reflected by dichroscope 104, is reflected by visible near-infrared grating 110 and one group second
After lens group 111, it is focused on visible near-infrared focus planar detector 112.And the spectrograph scheme shown in Fig. 1 is lacked there are many
Point, such as：1. slit component 102 needs to punch in center, and needs overleaf to plate highly reflecting films, difficulty of processing is larger, and
Cost is higher；2. short-wave infrared grating 106 and visible near-infrared grating 110 are generally adopted by the mode of transmission grating, and saturating
The difficulty of processing for penetrating grating is larger；3. the structure of the spectrograph shown in Fig. 1 using transmitted light path structure, spectrum input compared with
Width, aberration is larger, it is necessary to using achromatic lens group as 107 and second refractor group 111 of first refractive lens group, carries
The high cost of component.
As it can be seen that UV-SWIR spectrographs of the prior art realization, it is necessary to processing technology difficulty it is larger, and cost compared with
It is high.
Utility model content
The embodiment of the utility model provides a kind of spectrograph, to solve the reality of UV-SWIR spectrographs of the prior art
It is existing, it is necessary to processing technology difficulty it is larger, and the problem of cost is higher.
To reach above-mentioned purpose, the utility model adopts the following technical solution：
A kind of spectrograph, including the first concave mirror, plane mirror, dichroscope, the first grating, the second concave surface are anti-
Penetrate mirror, the first CCD, the second grating, the 3rd concave mirror and the 2nd CCD；
Incident light reflexes to institute after first concave mirror carries out collimation processing, by the plane mirror
State dichroscope；
The short infrared wave band light for reaching the dichroscope passes through the dichroscope, projects at the first grating, warp
After crossing the first optical grating diffraction, second concave mirror is reached, and described first is reflexed to by second concave mirror
At CCD；
The UV, visible light near infrared band light for reaching the dichroscope reflexes to described second by the dichroscope
At grating, after the second optical grating diffraction, the 3rd concave mirror is reached, and reflexed to by the 3rd concave mirror
At 2nd CCD.
Specifically, first grating and the second grating are plane reflection grating.
Specifically, the first CCD and the 2nd CCD is scientific research level refrigeration type CCD.
Specifically, first concave mirror, plane mirror, dichroscope, the first grating, the second concave reflection
Mirror, the first CCD, the second grating, the 3rd concave mirror and the 2nd CCD are packaged in a complete machine encapsulating structure.
The spectrograph that the utility model embodiment provides, using classical reflection-type C-T structures, i.e. the first concave mirror with
Second concave mirror is respectively as collimating mirror and imaging lens, and the first grating is as dispersion element, the first concave mirror and
Three concave mirrors are deleted as dispersion element respectively as collimating mirror and imaging lens, the second light so that and the structure of spectrograph is simple,
Cost can be controlled effectively, and on the other hand reduce the difficulty of processing of optical element, avoid disappearing using achromatic lens group
The problem of cost brought except the scheme of aberration is higher.Meanwhile combined using the first grating, the second concave mirror, the first CCD
Combined with the second grating, the 3rd concave mirror, the 2nd CCD, form the identical spectrometer architecture in both sides, collocation dichroscope point
Light, first grating and the second light of two wave bands of collocation are deleted, and can realize that wide spectrum takes the photograph spectrum in the case where not changing resolution ratio.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram of UV-SWIR spectrographs of the prior art；
Fig. 2 is the structure diagram for the spectrograph that the utility model embodiment provides.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
As shown in Fig. 2, the utility model embodiment provides a kind of spectrograph 20, including the first concave mirror 201, plane
Speculum 202, dichroscope 203, the first grating 204, the second concave mirror 205, the first CCD206, the second grating 207,
Three concave mirrors 208 and the 2nd CCD209.Wherein, CCD (Charge-Coupled Device) is detecting element, or
For charge coupled cell.
As shown in Fig. 2, incident light 30 (its wavelength band is 300nm to 1700nm) passes through first concave mirror
After 201 carry out collimation processing, the dichroscope 203 is reflexed to by the plane mirror 202.
Incident light 30 can be divided into short infrared wave band light (i.e. UV-SWIR, wavelength band are 1050nm to 1700nm) and purple
Outer visible near-infrared band of light (i.e. UV-VIS and VIS-NIR, wavelength band are 300nm to 1050nm).
In this way, the short infrared wave band light for reaching the dichroscope passes through the dichroscope 203, the first light is projected
At grid 204, after 204 diffraction of the first grating, second concave mirror 205 is reached, and by second concave reflection
Mirror 205 is reflexed at the first CCD206.
The UV, visible light near infrared band light for reaching the dichroscope reflexes to described by the dichroscope 203
At two gratings 207, after 207 diffraction of the second grating, the 3rd concave mirror 208 is reached, and by the 3rd concave surface
Speculum 208 is reflexed at the 2nd CCD209.
In this way, the signal obtained by the first CCD206 and the 2nd CCD209 carries out data processing, two CCD are obtained
Signal is combined, you can realizes that wide spectrum is tested, its detailed process does not repeat here.
What deserves to be explained is dichroscope 203 in the utility model embodiment to wavelength band for 1050nm extremely
The transmissivity of the light of 1700nm is up to 90%, should and to the reflectivity of light that wavelength band is 300nm to 1050nm up to 90%
Dichroscope 203 can lift the thang-kng amount of all band spectrum.
Specifically, 204 and second grating 207 of the first grating is plane reflection grating.So that the first concave surface
Speculum and the second concave mirror are formed classical anti-respectively as collimating mirror and imaging lens, the first grating as dispersion element
Emitting C-T structures (Czerny-Turner, Cheney-Tener light channel structure).So that the first concave mirror and the 3rd concave reflection
Mirror respectively as collimating mirror and imaging lens, delete as dispersion element by the second light, forms classical reflection-type C-T structures so that take the photograph spectrum
The structure of instrument is simple, and cost can be controlled effectively, and improves the signal-to-noise ratio of spectrograph.
Specifically, the first CCD206 and the 2nd CCD209 is scientific research level refrigeration type CCD.Scientific research level refrigeration type CCD
CCD chip temperature can be reduced, so as to be very suitable for the collection of atomic low light image, improves the signal-to-noise ratio of spectrograph entirety.
Specifically, as shown in Fig. 2, first concave mirror 201, plane mirror 202, dichroscope 203, first
Grating 204, the second concave mirror 205, the first CCD206, the second grating 207, the 3rd concave mirror 208 and second
CCD209 is packaged in a complete machine encapsulating structure 210.By complete machine encapsulating structure 210, the first CCD206 and second can be avoided
CCD209 respectively belonging to two relatively independent spectrometers it is individually separated, it is more not convenient when in use the problem of.
The spectrograph that the utility model embodiment provides, using classical reflection-type C-T structures, i.e. the first concave mirror with
Second concave mirror is respectively as collimating mirror and imaging lens, and the first grating is as dispersion element, the first concave mirror and
Three concave mirrors are deleted as dispersion element respectively as collimating mirror and imaging lens, the second light so that and the structure of spectrograph is simple,
Cost can be controlled effectively, and on the other hand reduce the difficulty of processing of optical element, avoid disappearing using achromatic lens group
The problem of cost brought except the scheme of aberration is higher.Meanwhile combined using the first grating, the second concave mirror, the first CCD
Combined with the second grating, the 3rd concave mirror, the 2nd CCD, form the identical spectrometer architecture in both sides, collocation dichroscope point
Light, first grating and the second light of two wave bands of collocation are deleted, and can realize that wide spectrum takes the photograph spectrum in the case where not changing resolution ratio.
In this way, the utility model embodiment can realize a compact high-resolution wide spectrum spectrograph.
Specific embodiment is applied in the utility model to be set forth the principle and embodiment of the utility model, with
The explanation of upper embodiment is only intended to help the method and its core concept for understanding the utility model；Meanwhile for this area
Those skilled in the art, according to the thought of the utility model, there will be changes, comprehensive in specific embodiments and applications
Upper described, this specification content should not be construed as the limitation to the utility model.
Claims (4)
- A kind of 1. spectrograph, it is characterised in that including the first concave mirror, plane mirror, dichroscope, the first grating, Second concave mirror, the first CCD, the second grating, the 3rd concave mirror and the 2nd CCD；Incident light reflexes to described two after first concave mirror carries out collimation processing, by the plane mirror To Look mirror；The short infrared wave band light for reaching the dichroscope passes through the dichroscope, projects at the first grating, by After one optical grating diffraction, second concave mirror is reached, and the first CCD is reflexed to by second concave mirror Place；The UV, visible light near infrared band light for reaching the dichroscope reflexes to second grating by the dichroscope Place, after the second optical grating diffraction, reaches the 3rd concave mirror, and is reflexed to by the 3rd concave mirror described At 2nd CCD.
- 2. spectrograph according to claim 1, it is characterised in that first grating and the second grating are plane reflection Grating.
- 3. spectrograph according to claim 1, it is characterised in that the first CCD and the 2nd CCD is scientific research level refrigeration Type CCD.
- 4. spectrograph according to claim 1, it is characterised in that first concave mirror, plane mirror, two to Look mirror, the first grating, the second concave mirror, the first CCD, the second grating, the 3rd concave mirror and the 2nd CCD are packaged in In one complete machine encapsulating structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721397439.8U CN207366081U (en) | 2017-10-27 | 2017-10-27 | Spectrograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721397439.8U CN207366081U (en) | 2017-10-27 | 2017-10-27 | Spectrograph |
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| Publication Number | Publication Date |
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| CN207366081U true CN207366081U (en) | 2018-05-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727233A (en) * | 2017-10-27 | 2018-02-23 | 北京卓立汉光仪器有限公司 | Spectrograph |
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2017
- 2017-10-27 CN CN201721397439.8U patent/CN207366081U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727233A (en) * | 2017-10-27 | 2018-02-23 | 北京卓立汉光仪器有限公司 | Spectrograph |
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