CN116337228A - Monochromator with optimized light path and method of use thereof - Google Patents
Monochromator with optimized light path and method of use thereof Download PDFInfo
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- CN116337228A CN116337228A CN202111598814.6A CN202111598814A CN116337228A CN 116337228 A CN116337228 A CN 116337228A CN 202111598814 A CN202111598814 A CN 202111598814A CN 116337228 A CN116337228 A CN 116337228A
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- 238000002360 preparation method Methods 0.000 abstract description 6
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
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Abstract
The disclosure relates to the technical field of spectrum measuring instruments, in particular to a monochromator with an optimized light path and a using method thereof. The monochromator comprises: the light-emitting component is used for providing wide-spectrum polychromatic light; the light splitting component is used for splitting the wide-spectrum compound color light into continuous monochromatic light, and comprises an emergent slit for screening the continuous monochromatic light to obtain target monochromatic light; the half-mirror is arranged on the light-emitting side of the emergent slit and used for dividing the target monochromatic light into a reflected light beam and a transmitted light beam; the first spectrometer is used for measuring a spectral density curve of the reflected light beam; the second spectrometer is used to measure the spectral density curve of the transmitted beam. According to the method, the continuous monochromatic light sequentially passes through the emergent slit and the half mirror, so that the wavelength consistency of the reflected light beam and the transmitted light beam is effectively improved, the phenomenon of sidebands is avoided, the detection precision of the monochromator is improved, the coating process requirement of the half mirror is effectively reduced, and the preparation process difficulty and the preparation cost of the half mirror are reduced.
Description
Technical Field
The disclosure relates to the technical field of spectrum measuring instruments, in particular to a monochromator with an optimized light path and a using method thereof.
Background
Monochromators are very important spectroscopic instruments, which generally use a wide spectrum of polychromatic light, and the polychromatic light is decomposed into a series of continuous monochromatic light by a dispersive element, and the target monochromatic light is selected through an exit slit. Plays an important role in the fields of optical element transmittance curve test, photoelectric detector spectral response and the like.
Along with the improvement of scientific research and industrial requirements, a plurality of double-channel monochromators appear in the market, generally, a semi-transparent and semi-reflective lens is used for dividing a light beam into two parts, a transmitted light beam passes through an axial emergent slit and can be used for spectrum measurement, and a reflected light beam passes through a transverse emergent slit and can be used for spectrum measurement or light intensity stability monitoring. However, as shown in fig. 1, during the measurement, it was found that the spectrum of the transmitted beam and the reflected beam after passing through the axial exit slit and the transverse exit slit has sidebands, which significantly reduce the main peak energy and also reduce the spectral resolution. Through analysis and test, the main reason for generating sidebands is that light beams generate multi-beam interference in the semi-transparent semi-reflective lens, so that light with different wavelengths passes through the emergent slits, sidebands are formed, and the detection precision of the monochromator is poor.
Disclosure of Invention
To solve or at least partially solve the above technical problems, the present disclosure provides a monochromator with an optimized light path and a method of using the same.
The present disclosure provides a monochromator with an optimized light path, comprising:
a light emitting assembly for providing broad spectrum polychromatic light;
the light splitting assembly is used for splitting the wide-spectrum compound color light emitted by the light emitting assembly to obtain continuous monochromatic light, and comprises an emergent slit which is used for screening the continuous monochromatic light to obtain target monochromatic light;
the half-mirror is arranged on the light-emitting side of the emergent slit and used for dividing the target monochromatic light into a reflected light beam and a transmitted light beam;
a first spectrometer for measuring a spectral density curve of the reflected light beam;
and the second spectrometer is used for measuring the spectral density curve of the transmitted light beam.
In the monochromator provided by the disclosure, a light emitting component emits wide-spectrum polychromatic light, the wide-spectrum polychromatic light is incident into a light splitting component, continuous monochromatic light is obtained through light splitting of the light splitting component, the continuous monochromatic light is firstly screened through an emergent slit to obtain target monochromatic light, then the target monochromatic light is emitted to a half mirror, the target monochromatic light is divided into a reflected light beam and a transmitted light beam through the half mirror, the spectral density curve of the reflected light beam is measured through a first spectrometer, and the spectral density curve of the transmitted light beam is measured through a second spectrometer.
The continuous monochromatic light sequentially passes through the emergent slit and the half mirror to obtain a reflected light beam and a transmitted light beam, so that the wavelength consistency of the reflected light beam and the transmitted light beam is effectively improved, the sideband phenomenon is avoided, the detection precision of the monochromator is improved, the coating process requirement of the half mirror is effectively reduced, and the preparation process difficulty and the preparation cost of the half mirror are reduced.
Optionally, the light emitting assembly includes a light source component and an entrance slit.
Optionally, the light splitting component includes a grating, and the grating is disposed between the incident slit and the exit slit, and is configured to split the broad spectrum polychromatic light emitted by the light emitting component to obtain continuous monochromatic light.
Optionally, the light incident side of the grating is provided with at least one first reflector, and the first reflector is used for changing the incident angle of the broad spectrum polychromatic light entering the grating.
Optionally, at least one second reflector is disposed between the light emitting side of the grating and the exit slit, and the second reflector is used for changing the incident angle of the exit light of the grating into the exit slit.
Optionally, the outgoing light of the grating is perpendicularly incident to the outgoing slit.
The present disclosure also provides a method of using a monochromator with an optimized optical path, comprising:
s1: providing broad spectrum polychromatic light to the light-entering side of the light-splitting assembly;
s2: the emergent light of the light-splitting assembly is screened by the emergent slit to obtain target monochromatic light;
s3: dividing the target monochromatic light into a reflected light beam and a transmitted light beam by using a half-mirror;
s4: the spectral density profile of the reflected beam is measured with a first spectrometer and the spectral density profile of the transmitted beam is measured with a second spectrometer.
Optionally, the providing broad spectrum polychromatic light to the light-entering side of the light-splitting assembly includes:
the light flux of the light-entering side of the light-splitting assembly is controlled by an entrance slit.
Optionally, between S1 and S2, further includes:
s12: and utilizing a grating to split the broad spectrum multi-color light emitted by the light emitting component to obtain continuous monochromatic light.
Optionally, between S1 and S12, further includes:
s11: and changing the incident angle of the broad spectrum polychromatic light entering the grating through a first reflecting mirror.
Optionally, between S12 and S2, further includes:
s13: the incidence angle of the emergent light of the grating into the emergent slit is changed by the second reflector.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of the result of measuring spectral density curve by a spectrometer in the prior art;
FIG. 2 is a schematic diagram of a monochromator according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of spectral density curve measured by a spectrometer in a monochromator according to an embodiment of the present disclosure;
fig. 4 is a flow chart of a method of using a monochromator according to an embodiment of the present disclosure.
Wherein, 1-the luminous component; 11-a light source component; 12-entrance slit; 2-a light splitting assembly; 21-grating; 22-a first mirror; 23-a second reflector; 24-an exit slit; 3-semi-transparent semi-reflective mirror; 4-a first spectrometer; 5-a second spectrometer.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
As shown in fig. 2 to 3, an embodiment of the present disclosure provides a monochromator with an optimized optical path, including:
a light emitting assembly 1, the light emitting assembly 1 being for providing broad spectrum polychromatic light;
the light splitting assembly 2 is used for splitting the wide-spectrum compound-color light emitted by the light emitting assembly 1 to obtain continuous monochromatic light, the light splitting assembly 2 comprises an emergent slit 24, and the emergent slit 24 is used for screening the continuous monochromatic light to obtain target monochromatic light;
a half mirror 3, the half mirror 3 being disposed on the light-emitting side of the exit slit 24 for dividing the target monochromatic light into a reflected light beam and a transmitted light beam;
a first spectrometer 4, the first spectrometer 4 being for measuring a spectral density curve of the reflected light beam;
a second spectrometer 5, the second spectrometer 5 being for measuring the spectral density profile of the transmitted beam.
In the monochromator with the optimized light path provided by the disclosure, the light emitting component 1 emits a wide spectrum polychromatic light, the wide spectrum polychromatic light is incident into the light splitting component 2, a series of monochromatic lights are obtained through decomposition of the light splitting component 2, a series of monochromatic lights are firstly screened through the emergent slit 24 to obtain target monochromatic light, then the target monochromatic light is emitted to the half mirror 3, the target monochromatic light is divided into a reflected light beam and a transmitted light beam through the half mirror 3, the spectral density curve of the reflected light beam is measured through the first spectrometer 4, and the spectral density curve of the transmitted light beam is measured through the second spectrometer 5.
The continuous monochromatic light sequentially passes through the emergent slit 24 and the half-mirror 3 to obtain a reflected light beam and a transmitted light beam, so that the wavelength consistency of the reflected light beam and the transmitted light beam is effectively improved, the sideband phenomenon is avoided, the detection precision of the monochromator is improved, the coating process requirement of the half-mirror 3 is effectively reduced, and the preparation process difficulty and the preparation cost of the half-mirror 3 are reduced.
In some embodiments, the light emitting assembly 1 includes a light source part 11 and an entrance slit 12, and the light emitted from the light source part 11 is a broad spectrum polychromatic light.
In the light emitting module 1, the light source 11 emits an initial broad spectrum polychromatic light, which is collimated and focused to enter the slit 12. The incident light flux can be effectively controlled by providing the entrance slit 12 to form a broad spectrum polychromatic light incident on the light entrance side of the light splitting assembly 2.
In some embodiments, the light splitting assembly 2 comprises a grating 21, the grating 21 being arranged between the entrance slit 12 and the exit slit 24 for splitting the broad spectrum polychromatic light to obtain a continuous monochromatic light.
Specifically, the light incident side of the grating 21 is provided with at least one first reflective mirror 22, and the first reflective mirror 22 is used for changing the incident angle of the broad spectrum polychromatic light into the grating 21, so as to ensure that the incident light is incident into the grating 21 according to a set route.
Specifically, the number of the first mirrors 22 may be two, and the incident light is sequentially incident into the grating 21 through the two mirrors.
In some embodiments, at least one second mirror 23 is arranged between the light exit side of the grating 21 and the exit slit 24, the second mirror 23 being used to change the angle of incidence of the exit light of the grating 21 into the exit slit 24.
The second reflector 23 is configured to reflect the outgoing light of the grating 21 to the outgoing slit 24, so as to achieve outgoing of the target monochromatic light.
Specifically, the outgoing light of the grating 21 is perpendicularly incident to the outgoing slit 24 to ensure the outgoing of the target monochromatic light.
As shown in fig. 4, the embodiment of the present disclosure further provides a method for using a monochromator with an optimized light path, including:
s1: providing broad spectrum polychromatic light to the light-entering side of the light-splitting assembly 2;
s2: the outgoing slit 24 is utilized to screen the outgoing light of the light splitting component 2 so as to obtain target monochromatic light;
s3: dividing the target monochromatic light into a reflected light beam and a transmitted light beam by using a half-mirror 3;
s4: the spectral density profile of the reflected beam is measured with a first spectrometer 4 and the spectral density profile of the transmitted beam is measured with a second spectrometer 5.
In the above method, the wide spectrum polychromatic light is first provided to the light splitting component 2, so that the light splitting component 2 splits the wide spectrum polychromatic light, so that the single color light in the light splitting component 2 is screened by the exit slit 24 to obtain the target single color light. Then, the target monochromatic light is split into a reflected light beam and a transmitted light beam by the half mirror 3, and the reflected light beam and the transmitted light beam are measured by the first spectrometer 4 and the second spectrometer 5 to obtain spectral density curves of the reflected light beam and the transmitted light beam.
The method can be used for sequentially obtaining the reflected light beam and the transmitted light beam through the emergent slit 24 and the half mirror 3 by a series of monochromatic light obtained by decomposing the light splitting component 2, so that the wavelength consistency of the reflected light beam and the transmitted light beam is effectively improved, the phenomenon of sidebands is avoided, and the coating requirement of the half mirror 3 is greatly reduced, thereby reducing the cost.
The broad spectrum in the broad spectrum polychromatic light refers to a spectrum wavelength range >2000nm, for example, the spectrum wavelength range may take the values 2500nm, 3000nm, etc., which are not limited in this embodiment, and the value of a specific spectrum wavelength range may be selected according to specific use requirements.
Specifically, providing broad spectrum polychromatic light to the light-entering side of the light-splitting assembly 2 includes:
the light flux on the light-entering side of the light-splitting assembly 2 is controlled by the entrance slit 12.
Specifically, between S1 and S2, further comprising:
s12: the light beam of the broad spectrum compound color emitted by the light emitting component 1 is split by the grating 21 to obtain continuous monochromatic light.
Specifically, between S1 and S12, further comprising:
s11: the angle of incidence of the broad spectrum polychromatic light into the grating 21 is changed by the first mirror 22.
Specifically, between S12 and S2, further comprising:
s13: the incident angle of the outgoing light of the grating 21 into the outgoing slit 24 is changed by the second mirror 23.
The above-mentioned S1, S2, S3, S4, S11, S12 and S13 are code numbers of the respective steps, and are not sequence numbers of the step implementation sequence.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A monochromator with an optimized light path, comprising:
-a light emitting assembly (1), the light emitting assembly (1) being for providing broad spectrum polychromatic light;
the light splitting assembly (2) is used for splitting the wide-spectrum compound-color light emitted by the light emitting assembly (1) to obtain continuous monochromatic light, the light splitting assembly (2) comprises an emergent slit (24), and the emergent slit (24) is used for screening the continuous monochromatic light to obtain target monochromatic light;
the half-mirror (3) is arranged on the light-emitting side of the emergent slit (24) and used for dividing the target monochromatic light into a reflected light beam and a transmitted light beam;
-a first spectrometer (4), the first spectrometer (4) being adapted to measure a spectral density curve of the reflected light beam;
-a second spectrometer (5), the second spectrometer (5) being adapted to measure a spectral density profile of the transmitted light beam.
2. Monochromator according to claim 1, characterized in that the light emitting assembly (1) comprises a light source component (11) and an entrance slit (12).
3. Monochromator according to claim 2, characterized in that the light-splitting assembly (2) comprises a grating (21), the grating (21) being arranged between the entrance slit (12) and the exit slit (24) for splitting the broad spectrum polychromatic light emitted by the light-emitting assembly (1) into continuous monochromatic light.
4. A monochromator according to claim 3, characterized in that the light entrance side of the grating (21) is provided with at least one first mirror (22), the first mirror (22) being adapted to change the angle of incidence of the broad spectrum polychromatic light into the grating (21).
5. A monochromator according to claim 3, characterized in that at least one second mirror (23) is arranged between the light exit side of the grating (21) and the exit slit (24), the second mirror (23) being adapted to change the angle of incidence of the exit light of the grating (21) into the exit slit (24).
6. Monochromator according to claim 5, characterized in that the outgoing light of the grating (21) is perpendicularly incident to the outgoing slit (24).
7. A method of using a monochromator having an optimized light path, comprising:
s1: providing broad spectrum polychromatic light to the light-entering side of the light-splitting assembly (2);
s2: the outgoing slit (24) is utilized to screen outgoing light of the light splitting component (2) so as to obtain target monochromatic light;
s3: dividing the target monochromatic light into a reflected light beam and a transmitted light beam by using a half-mirror (3);
s4: the spectral density profile of the reflected beam is measured with a first spectrometer (4) and the spectral density profile of the transmitted beam is measured with a second spectrometer (5).
8. The method according to claim 7, wherein said providing broad spectrum polychromatic light to the light entry side of the light splitting assembly (2) comprises:
the light flux on the light entry side of the light splitting assembly (2) is controlled by an entrance slit (12).
9. The method of claim 7, further comprising, between S1 and S2:
s12: the grating (21) is utilized to split the broad spectrum compound color light emitted by the light emitting component (1) to obtain continuous monochromatic light.
10. The method of claim 9, further comprising, between S1 and S12:
s11: the incidence angle of the broad spectrum polychromatic light into the grating (21) is changed by a first mirror (22).
11. The method of claim 9, further comprising, between S12 and S2:
s13: the incidence angle of the outgoing light of the grating (21) into the outgoing slit (24) is changed by the second reflecting mirror (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598814.6A CN116337228A (en) | 2021-12-24 | 2021-12-24 | Monochromator with optimized light path and method of use thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111598814.6A CN116337228A (en) | 2021-12-24 | 2021-12-24 | Monochromator with optimized light path and method of use thereof |
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| CN116337228A true CN116337228A (en) | 2023-06-27 |
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| CN202111598814.6A Pending CN116337228A (en) | 2021-12-24 | 2021-12-24 | Monochromator with optimized light path and method of use thereof |
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