CN217638695U - Oil emission spectrometer light splitting system and device covering ultraviolet visible near-infrared band - Google Patents
Oil emission spectrometer light splitting system and device covering ultraviolet visible near-infrared band Download PDFInfo
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- CN217638695U CN217638695U CN202221476053.7U CN202221476053U CN217638695U CN 217638695 U CN217638695 U CN 217638695U CN 202221476053 U CN202221476053 U CN 202221476053U CN 217638695 U CN217638695 U CN 217638695U
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Abstract
The utility model discloses a cover oil emission spectrometer spectroscopic system and device of ultraviolet visible near-infrared band, wherein the system includes a rowland beam split light path and a flat field light path, and rowland beam split light path includes rowland circle, concave surface grating, entrance slit and rowland circle spectral surface and CCD collector, and the flat field light path sets up in rowland circle horizontal diameter top and lies in the coplanar with rowland beam split light path, and it includes: the zero-order reflector is positioned on the path of the zero-order light emitted by the concave grating; the secondary light splitting slit is positioned on a reflection light path of the zero-order reflector, and the distance from the zero-order reflector to the secondary light splitting slit is equal to the distance from the center of the zero-order reflector to a Rowland circle; the secondary light splitting grating is arranged on the emergent ray path of the secondary light splitting slit; and the flat field light path spectrum surface and the CCD collector are arranged on an emergent light path of the secondary light splitting grating and are positioned close to the horizontal diameter of the Rowland circle.
Description
Technical Field
The utility model relates to a fluid emission spectrometer spectroscopic system field particularly, relates to a cover fluid emission spectrometer spectroscopic system and device of the visible near infrared band of ultraviolet.
Background
The oil liquid emission spectrometer is used for measuring metal components in lubricating oil of mechanical equipment, so that the mechanical wear degree of the lubricating oil can be indirectly obtained, and information is provided for the maintenance of the equipment. The emission spectrum for analyzing the metal components belongs to an atomic spectrum, and the spectral line is a sharp line spectrum, so that the requirement on the resolution of a spectrometer is high. And the element analysis in the lubricating oil needs the wave band to cover 200-900nm.
The existing broadband atomic emission spectrum light splitting system has the following two modes:
1) Only a single rowland spectral system is adopted, and as shown in fig. 1, the photoelectric receiver adopts a photomultiplier or a CCD collector. The Rowland light splitting system has high resolution, but the spectral coverage range is relatively narrow, and when the wavelength band above 600nm is collected, the collector prevents the inclination angle from being too large, so that the sensitivity and the resolution are poor, and the spatial arrangement is difficult. Therefore, the spectroscopic system can not cover the wave band range of 200-900nm on the basis of ensuring the resolution of oil spectral analysis; or low density reticle (e.g., low dispersion) gratings for band coverage, resulting in resolution that is not satisfactory for analysis.
2) The rowland optical path is combined with the flat field optical path, as shown in fig. 2, the photoelectric receiver adopts a photomultiplier tube, and the flat field optical path and the rowland optical path are located on different planes. Compared with the light splitting system in fig. 1, the light splitting system has smaller area and wider wavelength band coverage. However, since the two light splitting paths of the rowland light path and the flat field light path are in different horizontal planes, 2 light chambers are required to be arranged, which causes the fluctuation size or direction of the two light splitting paths to be inconsistent, and the anti-seismic performance to be poor, thereby affecting the analysis result. In addition, in order to ensure the performance of the optical path, the required machining precision and assembly technology of the optical splitting system are higher, and the increase of the longitudinal height also leads to larger overall volume. If a photomultiplier collector is adopted, the volume of the photomultiplier occupies discontinuous receiving wave bands, wave band waste is caused, the selection of analysis element spectral lines is influenced, errors can be generated by deduction of a background and an internal standard, and the position design of each part is complex.
Therefore, there is a need in the art for an oil emission spectrometer spectroscopic system that is capable of covering the ultraviolet visible near infrared band to address the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a cover fluid emission spectrometer spectral system and device of ultraviolet visible near-infrared band, through on rowland grating beam split optical path system, the zero order spectrum utilization gets up, make rowland spectral system be used for the spectral analysis of 200nm-600 nm's medium and short wave, with the zero order spectrum beam split once more for the spectral analysis of 600nm-900 nm's long wave, thereby make the spectral system can satisfy the measurement demand of fluid emission spectrometer to whole wave band. And set up in same optical plane through the optical axis with two beam split light paths, same optics bottom plate of sharing for whole light path can be located same light room, and the control by temperature change is unanimous, and easily processing and assembly, and stability is better. And simultaneously, the utility model discloses a light path vertical height has reduced the height of a light room than the mode that adopts rowland light path and flat field light path to combine, and it is littleer to occupy total volume, and the structure is compacter.
In order to achieve the above object, the present invention provides an oil emission spectrometer spectroscopic system covering ultraviolet visible near-infrared band, comprising a rowland spectroscopic optical path and a flat optical path, wherein the rowland spectroscopic optical path comprises a rowland circle, a concave grating arranged on the left side of the horizontal diameter of the rowland circle, an entrance slit arranged on the lower half circle of the rowland circle, and a rowland circle spectrum surface and a CCD collector arranged on the arc surface of the rowland circle, wherein the normal line of the concave grating overlaps the horizontal diameter of the rowland circle; wherein:
the flat field light path is arranged above the horizontal diameter of the Rowland circle and is positioned on the same plane with the Rowland light splitting light path, and comprises:
the zero-order reflector is positioned on the path of the zero-order light emitted by the concave grating;
a secondary light splitting slit which is positioned on a reflection light path of the zero-order reflector, and the distance from the zero-order reflector to the secondary light splitting slit is equal to the distance from the center of the zero-order reflector to the Rowland circle;
the secondary light splitting grating is arranged on the path of the emergent light of the secondary light splitting slit; and
and the flat field light path spectrum surface and the CCD collector are arranged on an emergent light path of the secondary light splitting grating and are positioned close to the horizontal diameter of the Rowland circle.
In an embodiment of the present invention, wherein the secondary beam splitting grating is a flat field grating.
In an embodiment of the present invention, wherein the focal length of the secondary beam splitting grating is 58mm.
In an embodiment of the present invention, wherein the diameter of the rowland circle is 400mm.
In an embodiment of the present invention, wherein, from the incident light that the entrance slit got into with the normal contained angle of concave grating is 41.8, follows the concave grating is emergent to the zero order light of zero order reflector with the normal contained angle of concave grating is 41.8, the zero order light with contained angle between the reverberation of zero order reflector is 139.
In order to achieve the above object, the utility model provides an applied aforementioned device that covers the fluid emission spectrometer beam splitting system of the visible near infrared wave band of ultraviolet, it still includes:
the optical bottom plate is arranged below the oil emission spectrometer light splitting system covering the ultraviolet visible near-infrared wave band; and
and the flat-field light path shading cover is arranged outside the secondary light splitting slit, the secondary light splitting grating, the flat-field light path spectrum surface and the CCD collector and is used for shielding light interference between the Rowland light splitting light path and the flat-field light path.
The utility model discloses a cover oil emission spectrometer spectroscopic system and device of ultraviolet visible near infrared band, compare its advantage with prior art and lie in, rowland beam splitting light path and flat field light path are located the coplanar, wherein rowland beam splitting system is used for the spectral analysis of 200nm-600 nm's medium and short wave, with zero level spectrum light splitting once more, the long wave part of zero level light is utilized, just supplemented the spectrum of its long wave, a spectral analysis for 600nm-900 nm's long wave, thereby make the beam splitting system can satisfy the requirement of oil emission spectrometer to spectral resolution and the measurement demand of band range. And through the fine setting of each parameter, the resolution ratio is higher under the condition that the wave band covers 200-900nm, the requirement of an oil liquid emission spectrum can be met, the total volume is smaller, the structure is more stable, the imaging change is small, and the stability and the repeatability of system measurement are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional single Rowland optical splitting system;
FIG. 2 is a schematic diagram of a conventional Rowland optical path combined with a flat field optical path;
fig. 3 is a schematic diagram of an optical path system according to an embodiment of the present invention;
fig. 4 is a diagram illustrating an apparatus structure according to an embodiment of the present invention.
Description of the reference numerals: 1-an entrance slit; 2-a concave grating; 3-zero order mirror; 4-secondary light splitting slit; 5-secondary light splitting grating; 6-flat field spectral surface and CCD collector; 7-Rowland circular spectrum surface and CCD collector; 10-rowland circle; 11-an optical backplane; 12-flat field optical path mask.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
Fig. 3 is the optical path system schematic diagram of an embodiment, as shown in fig. 3, this embodiment provides a cover oil emission spectrometer optical splitting system of ultraviolet visible near-infrared band, and it comprises a rowland beam splitting optical path and a flat field optical path that is located the coplanar, utilizes the secondary beam splitting to carry out the beam splitting with the long wave part in its zero level spectrum and utilizes, and then has enlarged the wavelength range, satisfies the requirement of oil emission spectrometer, and it specifically includes:
a Rowland light splitting path, which comprises a Rowland circle 10, a concave grating 2 arranged on the left side of the horizontal diameter of the Rowland circle 10, an incidence slit 1 arranged on the lower semicircle of the Rowland circle 10, a Rowland circle spectrum surface arranged on the arc surface of the Rowland circle 10 and a CCD collector, wherein the normal line of the concave grating 2 is overlapped with the horizontal diameter of the Rowland circle 10;
a flat field optical path, which is arranged above the horizontal diameter of the rowland circle 10 and is positioned on the same plane with the rowland light splitting optical path, and comprises:
the zero-order reflector 3 is positioned on the path of the zero-order light emitted by the concave grating 2;
the secondary light splitting slit 4 is positioned on a reflection light path of the zero-order reflector 3, and the distance from the zero-order reflector 3 to the secondary light splitting slit 4 is equal to the distance from the center of the zero-order reflector 3 to the Rowland circle 10; here, the distance from the center of the zero-order reflector 3 to the rowland circle 10 can be regarded as an extension line of the zero-order light emitted from the concave grating 2 after reaching the zero-order reflector 3, the length of the extension line is represented as a in fig. 3, and the distance from the zero-order reflector 3 to the secondary light splitting slit 4 is also represented as a, which are equal to each other.
The secondary light splitting grating 5 is arranged on the emergent light path of the secondary light splitting slit 4; and
and the flat field light path spectrum surface and the CCD collector 6 are arranged on an emergent light path of the secondary light splitting grating 5 and are positioned at a position close to the horizontal diameter of the Rowland circle 10.
In the present embodiment, the secondary spectroscopic grating 5 is a flat field grating.
In the present embodiment, the focal length of the secondary spectroscopic grating 5 is 58mm.
In the present embodiment, the rowland circle 10 has a diameter of 400mm.
In the present embodiment, an angle between the incident light entering from the entrance slit 1 and the normal of the concave grating 2 is 41.8 °, an angle between the zero-order light exiting from the concave grating 2 to the zero-order mirror 3 and the normal of the concave grating 2 is 41.8 °, and an angle between the zero-order light and the reflected light of the zero-order mirror 3 is 139 °.
In this embodiment, a rowland light path and a flat field light path located in the same plane are combined, and by using a zero-order spectrum, zero-order light is reflected to a secondary light splitting slit 4 by arranging a zero-order reflector 3 on the zero-order light path, and the distance from the zero-order reflector 3 to the secondary light splitting slit 4 of light is equal to the distance from the zero-order reflector 3 to a rowland circle 10 (the direction of the extension line of the zero-order light); the zero-order reflected light irradiates a secondary light splitting grating 5 (flat field grating) through a secondary light splitting slit 4, is split by the secondary light splitting grating 5 (flat field grating), and is imaged on a CCD. The CCD of the flat field light path part is arranged in a Rowland circle and close to one side of incident light, so that the area of the whole light path is not increased, and the wave band of the whole light path system can cover the receiving range (200-600 nm) of the spectral surface of the Rowland light path and the receiving range (400-900 nm) of the spectral surface of the flat field light path, thereby achieving the wave band range of the total light path system of 200-900nm.
Fig. 4 is a device structure diagram of an embodiment of the present invention, as shown in fig. 4, this embodiment provides a device for applying the aforementioned oil liquid that covers the ultraviolet visible near-infrared band to emit a spectrometer beam splitting system, which includes:
the optical bottom plate 11 is arranged below the oil emission spectrometer light splitting system covering the ultraviolet visible near-infrared wave band and is used for arranging all components in the light splitting system;
and a flat-field light path shading cover 12, which is arranged outside the secondary light splitting slit 4, the secondary light splitting grating 5, the flat-field light path spectrum surface and the CCD collector 6, and is used for shielding the light interference between the Rowland light splitting light path and the flat-field light path.
In this embodiment, because the rowland splitting optical path and the flat-field optical path are located in the same plane, the rowland splitting optical path and the flat-field optical path share the same optical backplane. By using the zero-order spectrum, a zero-order reflector 3 is arranged on a zero-order light path, the zero-order light is reflected to a secondary light splitting slit 4, the distance from the zero-order reflector 3 to the secondary light splitting slit 4 is equal to the distance from the zero-order reflector 3 to a Rowland circle 10 (the extension line direction of the zero-order light), the zero-order reflected light irradiates a secondary light splitting grating 5 (flat field grating) after passing through the secondary light splitting slit 4, and the light is split by the flat field grating and then imaged on a CCD. The CCD of the flat field light path part is arranged in the Rowland circle 10 and close to one side of incident light, and a flat field light path shading cover 12 is arranged outside the flat field light path part and is used for shading light interference between the Rowland light splitting light path and the flat field light path. The diameter of the Rowland circle is 400mm, the included angle between incident light and the normal of the concave grating 2 is 41.8 degrees, and the included angle between zero-order light and zero-order reflected light is 139 degrees. The device arranged in the way can be used in the oil emission spectrometer.
The utility model discloses a cover oil emission spectrometer spectroscopic system and device of ultraviolet visible near infrared band, rowland beam splitting light path and flat field light path are located the coplanar, wherein rowland beam splitting system is used for the spectral analysis of 200nm-600 nm's medium short wave, with zero level spectrum beam splitting again, the long wave part of zero level light is utilized, just supplemented the spectrum of its long wave, a spectral analysis for 600nm-900 nm's long wave, thereby make the beam splitting system can satisfy the requirement of oil emission spectrometer to spectral resolution and the measurement demand of band range. Through the fine setting of each parameter, under the condition that the wave band covers 200-900nm, the resolution ratio is higher, the requirement of an oil emission spectrum can be met, the total volume is smaller, the structure is more stable, the imaging change is small, and the stability and the repeatability of system measurement are improved.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (6)
1. An oil emission spectrometer light splitting system covering ultraviolet visible near-infrared bands comprises a Rowland light splitting light path and a flat light path, wherein the Rowland light splitting light path comprises a Rowland circle, a concave grating arranged on the left side of the horizontal diameter of the Rowland circle, an incidence slit arranged on the lower semicircle of the Rowland circle, a Rowland circle spectrum surface arranged on the cambered surface of the Rowland circle and a CCD (charge coupled device) collector, wherein the normal line of the concave grating is overlapped with the horizontal diameter of the Rowland circle,
the flat field light path is arranged above the horizontal diameter of the Rowland circle and is positioned on the same plane with the Rowland light splitting light path, and comprises:
the zero-order reflector is positioned on the path of the zero-order light emitted by the concave grating;
a secondary light splitting slit is positioned on a reflection light path of the zero-order reflector, and the distance from the zero-order reflector to the secondary light splitting slit is equal to the distance from the center of the zero-order reflector to the Rowland circle;
the secondary light splitting grating is arranged on the emergent ray path of the secondary light splitting slit; and
and the flat field light path spectrum surface and the CCD collector are arranged on an emergent light path of the secondary light splitting grating and are positioned close to the horizontal diameter of the Rowland circle.
2. The oil emission spectrometer spectroscopic system covering the ultraviolet visible near infrared band of claim 1 wherein the secondary spectroscopic grating is a flat field grating.
3. The oil emission spectrometer spectroscopic system covering the ultraviolet-visible near-infrared band as set forth in claim 1, wherein the focal length of the secondary spectroscopic grating is 58mm.
4. The oil emission spectrometer spectroscopic system covering the ultraviolet-visible near-infrared band of claim 1, wherein the rowland circle has a diameter of 400mm.
5. The optical splitting system of an oil emission spectrometer covering the ultraviolet-visible near-infrared band according to claim 1, wherein the angle between the incident light entering from the entrance slit and the normal of the concave grating is 41.8 °, the angle between the zero-order light exiting from the concave grating to the zero-order reflector and the normal of the concave grating is 41.8 °, and the angle between the zero-order light and the reflected light of the zero-order reflector is 139 °.
6. An oil emission spectrometer light splitting device covering an ultraviolet visible near-infrared band, comprising the oil emission spectrometer light splitting system covering the ultraviolet visible near-infrared band of any one of claims 1 to 5, characterized by further comprising:
the optical bottom plate is arranged below the oil emission spectrometer light splitting system covering the ultraviolet visible near-infrared band; and
and the flat field light path shading cover is arranged outside the secondary light splitting slit, the secondary light splitting grating, the flat field light path spectrum surface and the CCD collector and is used for shielding light interference between the Rowland light splitting light path and the flat field light path.
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| CN202221476053.7U CN217638695U (en) | 2022-06-13 | 2022-06-13 | Oil emission spectrometer light splitting system and device covering ultraviolet visible near-infrared band |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116659665A (en) * | 2023-05-24 | 2023-08-29 | 广东中科谛听科技有限公司 | Full spectrum signal acquisition device |
| CN116659665B (en) * | 2023-05-24 | 2024-05-03 | 广东中科谛听科技有限公司 | Full spectrum signal acquisition device |
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2022
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116659665A (en) * | 2023-05-24 | 2023-08-29 | 广东中科谛听科技有限公司 | Full spectrum signal acquisition device |
| CN116659665B (en) * | 2023-05-24 | 2024-05-03 | 广东中科谛听科技有限公司 | Full spectrum signal acquisition device |
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