CN119413280A - High-frequency monochromator and light splitting method thereof - Google Patents
High-frequency monochromator and light splitting method thereof Download PDFInfo
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- CN119413280A CN119413280A CN202411798366.8A CN202411798366A CN119413280A CN 119413280 A CN119413280 A CN 119413280A CN 202411798366 A CN202411798366 A CN 202411798366A CN 119413280 A CN119413280 A CN 119413280A
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Abstract
The invention provides a high-frequency monochromator and a light splitting method thereof, which are characterized by comprising a spectrometer and a scanning and emitting mechanism, wherein the spectrometer emits light beams, the scanning and emitting mechanism is loaded, an incident slit, the spectrometer, a field diaphragm, a collimation optical assembly, a rotary reflecting mirror or a rotary reflecting mirror with a grating light splitting function, a converging imaging assembly and an emitting slit are sequentially arranged along a light path, the light beams emit through the field diaphragm and the emitting slit to form an L-shaped light path, the incident slit, the spectrometer, the field diaphragm, the collimation optical assembly, the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function, the converging imaging assembly and the emitting slit are all vertically fixed with a horizontal plane, and the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function is arranged at a transition position of the L-shaped light path, so that the monochromator with a simple light splitting structure and high light splitting efficiency is obtained.
Description
Technical Field
The invention belongs to the technical field of spectrum instruments, in particular to the technical field of monochromators, and particularly relates to a high-frequency monochromator.
Background
In the prior art, a monochromator can be generally used as a light source and is used for providing a standard monochromatic light source for optical system spectrum calibration and other works.
The prior monochromator has a structure generally adopting a double C-T structure to form a symmetrical structure so as to maintain better monochromaticity and have the characteristic of correcting residual aberration. The optical principle is that white light (polychromatic light) in a monochromator is incident into a collimation system through an incident slit, the collimation system converts the incident light into collimated parallel light beams, the collimated parallel light beams are then incident into a plane grating, the incident white light is divided into monochromatic light through dispersion of the plane grating, the monochromatic light emitted from the plane grating is incident into a converging optical system, the converging optical system converges the emergent light beams to the vicinity of the emergent slit to form monochromatic slit images which are sequentially arranged (color bars), and the monochromatic light dispersed into the monochromatic light by the grating is sequentially arranged according to a dispersion rule and is presented to the vicinity of the emergent slit. The incident angle of the incident white light relative to the grating is changed by rotating the plane grating, so that the position of the monochromatic light after being dispersed by the grating at the exit slit of the monochromator is changed, and the monochromatic light is emitted through the selective transmission of the slit and is used for the spectral characteristic measurement or calibration of an optical system.
But the problems are:
1. The internal light path structure is complex, such as a monochromator disclosed in the domestic patent CN101275869B, and a secondary diffraction light path is formed inside;
2. only a rotating plane grating structure is used, so that the light splitting efficiency is not high. The component has large structural volume, large rotational inertia and slow rotation.
Therefore, there is a need for a monochromator with a simple spectroscopic structure and high spectroscopic efficiency.
Disclosure of Invention
In view of the problems, the application provides a monochromator with simple light splitting structure and high light splitting efficiency aiming at the technical problem that the light path of the existing monochromator is complex.
The application provides a high-frequency monochromator, which is characterized by comprising a spectrometer and a scanning and emergent mechanism, wherein the scanning and emergent mechanism is loaded after the spectrometer emits light beams, an incident slit, the spectrometer, a field diaphragm, a collimation optical assembly, a rotating reflector or a rotating reflector with a grating light splitting function, a converging imaging assembly and an emergent slit are sequentially arranged along a light path, and light rays are emergent through the field diaphragm and the emergent slit to form an L-shaped light path;
The optical imaging device comprises an incident slit, a spectrometer, a field diaphragm, a collimation optical assembly, a rotary reflecting mirror or a rotary reflecting mirror with a grating light splitting function, a convergence imaging assembly and an emergent slit, wherein the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function is vertically fixed with a horizontal plane, the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function is arranged at the joint of an L-shaped light path, the central axis of the collimation optical assembly and the central axis of the field diaphragm are arranged on an optical axis, the convergence imaging assembly and the emergent slit are arranged on a linear optical axis in the emergent direction of light, and the central axis of the convergence imaging assembly and the central axis of the emergent slit are arranged on an optical axis, and corresponding emergent slits are arranged at the image plane of the convergence imaging assembly.
The application also provides another high-frequency monochromator, which is characterized by comprising a scanning and emergent mechanism, wherein the scanning and emergent mechanism comprises an incident slit, a collimating optical assembly, a rotating reflecting mirror with a grating light splitting function, a converging imaging assembly and an emergent slit, light rays form an L-shaped light path through incidence and emergent, the incident slit, the collimating optical assembly, the rotating reflecting mirror with the grating light splitting function, the converging imaging assembly and the emergent slit are sequentially arranged along the L-shaped light path, the incident slit, the collimating optical assembly, the rotating reflecting mirror with the grating light splitting function, the converging imaging assembly and the emergent slit are all vertically fixed with a horizontal plane, the rotating reflecting mirror with the grating light splitting function is arranged at the transition position of the L-shaped light path, the central axis of the collimating optical assembly and the central axis of the incident slit are arranged on one optical axis, and the central axis of the converging imaging assembly and the central axis of the emergent slit are arranged on one optical axis, and the corresponding emergent slit is arranged at the image plane of the converging imaging assembly.
Further, the rotating mirror or the rotating mirror with the grating light splitting function is a structure of superposing the grating on the rotating mirror or the rotating mirror.
Further, the rotating mirror or the rotating mirror with the grating light splitting function is a structure or a rotating mirror of overlapping gratings of the scanning mirror.
Further, the collimating optical component is a lens or a reflecting mirror, and the resolution of the lens or the reflecting mirror is adapted to the resolution of the spectrum and the position of the motor.
Further, the converging imaging component is a lens or a reflecting mirror, and the resolution of the converging imaging component is adapted to the resolution of a spectrum and the position of a motor.
Furthermore, the L-shaped light path forms a certain included angle, and specifically, the L-shaped light path can be adjusted as required to form an acute angle or an obtuse angle.
Further, the rotating mirror or the rotating mirror with the grating light splitting function is positioned at the entrance pupil and the exit pupil of the two optical components of the collimation optical component and the convergence imaging component.
Further, the superimposed grating adopts a planar grating, a concave grating or a convex grating.
Further, the reflection mirror or the rotary reflection mirror having the grating beam splitting function is rotated at a high speed by the rotary mechanism, so that the switching speed of the monochromatic light is also high, and a high-frequency switching monochromatic output is formed.
The application provides a light splitting method of a monochromator, which is characterized by comprising the following steps of sequentially setting an incidence slit, a spectrometer, a field diaphragm, a collimation optical system, a rotary mirror or a rotary mirror with a grating light splitting function, a converging imaging system and an emergent slit along the light incidence direction, enabling white light or compound color light to enter from the incidence slit, changing an incident divergent light beam into a collimated parallel light beam through the collimation optical system, then entering the rotary mirror or the rotary mirror with the grating light splitting function, enabling various color lights to enter the converging imaging system to be imaged on the image surface of the converging imaging system through the mirror, displaying images of slits of various color lights on the image surface of the converging imaging system, setting corresponding emergent slits on the image surface of the converging imaging system, and sequentially emitting various color lights, namely single color lights, at the emergent slits to form the monochromator.
Further, the reflection mirror or the rotary reflection mirror having the grating beam splitting function is rotated at a high speed by the rotary mechanism, so that the switching speed of the monochromatic light is also high, and a high-frequency switching monochromatic output is formed.
Further, the reflecting mirror or the rotary reflecting mirror with the grating light splitting function can obtain monochromatic light with one color when rotated for one angle.
Furthermore, the rotating mirror or the rotating mirror with the grating beam splitting function is arranged at the entrance pupil and the exit pupil of the two optical systems of the collimation optical system lens1 and the convergence imaging system lens2, so that the input and output beam energy can be conveniently and efficiently utilized.
Compared with the prior art, the application has the following beneficial effects:
(1) The high-frequency monochromator adopts an L-shaped light path, the light path is simple, optical elements can be simply arranged, the L-shaped light path can be adjusted at an included angle of 0-180 degrees according to the requirement, and the adaptability is high.
(2) The high-frequency monochromator adopts the rotary reflecting mirror (or rotary reflecting mirror) with the grating light splitting function, so that the light splitting efficiency is ensured, and the component structure of the conventional monochromator is simplified and expanded.
Drawings
FIG. 1 is a schematic diagram of the structure of the high-frequency monochromator of the present invention.
FIG. 2 is a schematic diagram of a spectrometer with a convex grating according to a preferred embodiment of the present invention.
Fig. 3 is a schematic diagram of the operation of the high frequency monochromator of the present invention.
Fig. 4 is a schematic structural diagram of a high-frequency monochromator in a preferred embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a rotating mirror with a grating light-splitting function.
The figure indicates:
1 entrance slit, 2 convex grating, 3 exit slit, 4 collimation optical component, 5 convergence imaging component, 6 grating, 7 reflector, 8 rotation axis, 9 motor, 10 rotation reflector (or rotation reflector) with grating beam splitting function, 11 field stop.
Detailed Description
The technical scheme of the present invention is further explained below with reference to the accompanying drawings and specific embodiments, and it is believed that those skilled in the art can fully understand the technical scheme.
Example 1
As shown in fig. 1, the present embodiment provides a high-frequency monochromator, which includes a spectrometer and a scanning and emitting mechanism, wherein the spectrometer emits a light beam, and then loads the scanning and emitting mechanism, an incident slit 1, the spectrometer, a field stop 11, a collimating optical component 4, a rotating mirror or a rotating mirror 10 with a grating beam splitting function, a converging imaging component 5 and an emitting slit 3 are sequentially arranged along an optical path, and the light beam is emitted through the field stop 11 and the emitting slit 3 to form an L-shaped optical path;
The optical fiber focusing device comprises an incident slit 1, a spectrometer, a field diaphragm 11, a collimating optical component 4, a rotary reflecting mirror or a rotary reflecting mirror 10 with a grating light splitting function, a focusing imaging component 5 and an emergent slit 3, wherein the rotary reflecting mirror or the rotary reflecting mirror 10 with the grating light splitting function is vertically fixed with a horizontal plane, the rotary reflecting mirror or the rotary reflecting mirror 10 with the grating light splitting function is arranged at the joint of an L-shaped light path, the central axis of the collimating optical component 4 and the central axis of the field diaphragm 11 are arranged on an optical axis, the focusing imaging component 5 and the emergent slit 3 are arranged on a linear optical axis in the emergent direction of light, the central axis of the focusing imaging component 5 and the central axis of the emergent slit 3 are arranged on an optical axis, and the corresponding emergent slit 3 is arranged at the image plane of the focusing imaging component 5.
In this embodiment, the spectrometer selected may be any conventional spectrometer.
In this embodiment, the L-shaped optical path forms an included angle, and in particular, the L-shaped optical path may be adjusted to form an acute angle or an obtuse angle as required.
In this embodiment, as shown in fig. 5, the rotating mirror or rotating mirror 10 with the grating light splitting function is a structure or rotating mirror in which the rotating mirror overlaps the grating. The rotary reflecting mirror with the grating light splitting function is a structure of superposing gratings on the rotary reflecting mirror. The turning mirror can be a plane or a superimposed grating, the type of the grating is not limited, and the superimposed grating 6 adopts a plane grating, a concave grating or a convex grating.
In another embodiment, as shown in fig. 5, the rotating mirror or rotating mirror 10 with the grating splitting function is a structure or rotating mirror in which a grating is superimposed on a scanning mirror. The turning mirror can be a plane or a superimposed grating, the type of the grating is not limited, and the superimposed grating 6 adopts a plane grating, a concave grating or a convex grating.
In this embodiment, the collimating optical component 4 is a lens or a mirror, and the resolution of the lens or the mirror is adapted to the resolution of the spectrum and the position of the motor.
In this embodiment, the convergence imaging component 5 is a lens or a reflecting mirror, and the resolution of the convergence imaging component 5 is adapted to the resolution of the spectrum and the position of the motor.
In this embodiment, the rotating mirror or rotating mirror 10 with the grating beam splitting function is located at the entrance pupil and the exit pupil of the two optical components of the collimating optical component 4 and the converging imaging component 5. The input and output beam energy is conveniently and efficiently utilized.
In this embodiment, the line width of the slit affects the spectral resolution and energy of the spectrometer, and the line width of the slit (the extreme end in the figure) affects the spectral resolution and energy of the spectrometer. Can be adjusted as required.
In the present embodiment, the rotating mirror 10 having the grating beam splitting function is rotated at a high speed by the rotating mechanism, so that the switching speed of the monochromatic light is also high, and a high-frequency switching monochromatic output is formed. Since the mirror (the mirror 10 having the grating beam-splitting function) rotates at a high speed, the switching speed of the monochromatic light is also high, and thus the monochromatic light output of high-frequency switching is realized.
The light splitting method of the monochromator comprises the following steps of sequentially setting an incidence slit 1, a spectrometer, a field diaphragm 11, a collimation optical component 4, a rotary mirror or a rotary mirror 10 with a grating light splitting function, a convergence imaging component 5 and an emergent slit 3 along the light incidence direction, enabling white light or compound color light to enter from the incidence slit 1, changing an incident divergent light beam into a collimation parallel light beam through the spectrometer, the field diaphragm 11 and the collimation optical component 4, then entering the rotary mirror or the rotary mirror 10 with the grating light splitting function, enabling various color lights to enter the convergence imaging component 5 to be imaged on the image surface of the convergence imaging component 5, displaying color bars of slits 1 of various color lights on the image surface of the convergence imaging component 5, setting corresponding emergent slits 3 on the image surface of the convergence imaging component 5, and sequentially emitting various color lights, namely single color lights, at the emergent slit 3 to form the monochromator by rotating the rotary mirror or the rotary mirror 10 with the grating light splitting function. The reflecting mirror or the rotary reflecting mirror with the grating light splitting function can obtain monochromatic light of one color every time the reflecting mirror rotates by one angle.
And the scanning optical system is loaded after the light beam is emitted, the scanning mirror in the scanning optical system scans and enters the emitting optical system, and the monochromatic light is emitted after the fixed emitting slit 3. The scanning mirror can provide a fast monochromatic light switching action, which switching frequency can exceed 1000Hz. An exit slit 3 at a fixed position is arranged on the focal plane of the exit optical system, and the output of the appointed monochromatic light can be realized by matching with the scanning of the scanning mirror.
Example two
As shown in fig. 2, on the basis of the first embodiment, the spectrometer is preferably a spectrometer with a convex grating, and the spectrometer structure is shown in a schematic diagram, wherein the spectrometer comprises an incident slit 1 reflecting mirror, a convex grating, an emergent slit 3 or a field diaphragm 11, and the incident slit 1, the emergent slit 3 or the field diaphragm 11, the reflecting mirror, the convex grating, the emergent slit 3 or the field diaphragm 11 are sequentially arranged along an optical path.
In the embodiment, the convex grating is used as the light-splitting element, and the convex grating does not need to rotate in the light-splitting process, so that the position of emergent monochromatic light is ensured to be relatively fixed. And the scanning optical system is loaded after the light beam is emitted, the scanning mirror in the scanning optical system scans and enters the emitting optical system, and the monochromatic light is emitted after the fixed emitting slit 3.
Naturally, the light-splitting element may also adopt a planar grating, and after still adopting the diffraction spectrum emitting position, the scanning optical system is loaded, the scanning mirror in the scanning optical system is utilized to scan the monochromatic light to the emitting optical system, and the monochromatic light is emitted after the fixed emitting slit 3.
Example III
The principle of the simple high-speed monochromator is that the simple high-speed monochromator consists of two matched objective lenses and a high-speed grating oscillating mirror, so that a white light beam collimated by the front end objective lens is incident on a turning mirror (grating) and is diffracted by the high-speed oscillating mirror to form a collimated light beam in monochromatic arrangement, the collimated light beam is converged by a second objective lens, and then the monochromatic light beam is arranged on the focal plane of the objective lens and is emitted by an emergent slit 3. When the exit slit 3 is fixed, the rotation of the oscillating mirror can select the wavelength, i.e. the spectrum, of the outgoing monochromatic light.
As shown in fig. 3-4, this embodiment provides another high-frequency monochromator, including a scanning and emitting mechanism, where the scanning and emitting mechanism includes an incident slit 1, a collimating optical component 4, a rotating mirror or a rotating mirror 10 with a grating beam splitting function, a converging imaging component 5, and an emitting slit 3, where light rays form an L-shaped optical path through incidence and emission, and an incident slit 11, a collimating optical component 4, a rotating mirror 10 with a grating beam splitting function, a converging imaging component 55, and an emitting slit 3 are sequentially set up along the L-shaped optical path, where the incident slit 1, the collimating optical component 4, the rotating mirror with a grating beam splitting function, the converging imaging component 5, and the emitting slit 3 are all fixed perpendicularly to a horizontal plane, where the rotating mirror with a grating beam splitting function is set up, and where the central axis of the collimating optical component 4 and the central axis of the incident slit 1 are on one optical axis, and the central axis of the converging imaging component 5 and the central axis of the emitting slit 3 are on one optical axis, and the corresponding slit 3 is set up at the image plane of the converging imaging component 5.
In this embodiment, the L-shaped light path may be adjusted to an acute angle or an obtuse angle, i.e. to form an included angle of 0 ° -180 °;
in this embodiment, as shown in fig. 5, the rotating mirror with the grating light splitting function is a structure of superimposing a grating on the rotating mirror or the rotating mirror. The rotary reflecting mirror with the grating light splitting function is a structure of superposing gratings on the rotary reflecting mirror. The turning mirror can be a plane or a superimposed grating, the types of the gratings are not limited, and the superimposed grating adopts a plane grating, a concave grating or a convex grating.
In another embodiment, as shown in fig. 5, the rotating mirror with the grating light splitting function is a structure of superimposing a grating on a scanning mirror or a rotating mirror. The turning mirror can be a plane or a superimposed grating, the type of the grating 6 is not limited, and the superimposed grating adopts a plane grating, a concave grating or a convex grating.
In this embodiment, the collimating optical component 4 is a lens or a reflecting mirror, and the resolution of the collimating mirror is adapted to the resolution of the spectrum and the position of the motor.
In this embodiment, the rotating mirror with the grating beam-splitting function is located at the entrance pupil and the exit pupil of the two optical components of the collimating optical component 4 and the converging imaging component 5. The input and output beam energy is conveniently and efficiently utilized.
In this embodiment, the line width of the slit affects the spectral resolution and energy of the spectrometer, and the line width of the slit (the extreme end in the figure) affects the spectral resolution and energy of the spectrometer. Can be adjusted as required.
In the present embodiment, the reflection mirror 10 having the grating beam-splitting function is rotated at a high speed by a rotation mechanism (motor and rotation shaft), so that the switching speed of monochromatic light is also high, and a high-frequency switching monochromatic output is formed. Since the mirror (the mirror 10 having the grating beam-splitting function) rotates at a high speed, the switching speed of the monochromatic light is also high, and thus the monochromatic light output of high-frequency switching is realized.
White light or multi-color light is incident from the incident slit 1, changed into a collimated parallel light beam by the collimating optical component 4, then is incident to the rotary reflecting mirror with the grating light splitting function, after grating light splitting, various color lights are incident to the converging imaging component 5 to be imaged on the image surface of the converging imaging component 5, the image of the slit 1 of the various color lights is presented on the image surface of the converging imaging component 5, the corresponding emergent slit 33 is arranged on the image surface of the converging imaging component 5, and various color lights, namely single color lights, are sequentially emitted at the emergent slit 3 by rotating the rotary reflecting mirror with the grating light splitting function to form the monochromator. The reflecting mirror or the rotary reflecting mirror with the grating light splitting function rotates for one angle to obtain monochromatic light of one color, and rotates for one angle to obtain monochromatic light of one color.
The foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411798366.8A CN119413280A (en) | 2024-12-09 | 2024-12-09 | High-frequency monochromator and light splitting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411798366.8A CN119413280A (en) | 2024-12-09 | 2024-12-09 | High-frequency monochromator and light splitting method thereof |
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| CN119413280A true CN119413280A (en) | 2025-02-11 |
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| CN202411798366.8A Pending CN119413280A (en) | 2024-12-09 | 2024-12-09 | High-frequency monochromator and light splitting method thereof |
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