spectrometer

Abstract

The application relates to a spectrometer, which comprises a light-emitting element, a diaphragm, a light-splitting element and a chiral photoelectric detector. The diaphragm is arranged on the propagation path of the light emitted by the light-emitting element and is used for limiting the width of the light emitted by the light-emitting element and passing through the diaphragm; the light-splitting element is arranged on the propagation path of the light irradiated by the diaphragm and is used for dispersing the light irradiated by the diaphragm into light of multiple wavelengths; the chiral photoelectric detector is arranged on the propagation path of the light dispersed by the light-splitting element and is used for receiving the light dispersed by the light-splitting element and converting the light into an electric signal; and the chiral photoelectric detector is used for identifying and converting circularly polarized light or elliptically polarized light into an electric signal. The arrangement of the chiral photoelectric detector enables the spectrometer to identify and detect circularly polarized light or elliptically polarized light, so that the spectrometer does not need to frequently replace the detector during detection, the detection efficiency of the spectrometer is improved, and the detection cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of spectrometers, and more particularly to a spectrometer. Background Technology

[0002] A spectrometer is a scientific instrument that uses optical principles to decompose complex light into spectral lines. It is a fundamental device for observing, analyzing, and processing the structure and composition of substances, offering advantages such as high analytical precision, a wide measurement range, high speed, and small sample volume requirements. Therefore, the resolution of molecular characteristics, concentration measurement, substance identification, and the observation of both sides of astronomical spectra all require the assistance of a spectrometer. Spectrometers are widely used in metallurgy, geology, petrochemicals, medicine and health, environmental protection, resource and water temperature surveying, and other fields.

[0003] However, traditional spectrometers have limited measurement ranges due to design and structural limitations. They can usually only cover the lower wavelength range and cannot directly detect circularly polarized or elliptically polarized light. This often requires replacing different components and photodetectors for measurement, and there is a technical problem that they cannot directly detect circularly polarized or elliptically polarized light. Utility Model Content

[0004] This application provides a spectrometer to solve the technical problem that spectrometers cannot directly detect circularly polarized light or elliptically polarized light.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a spectrometer, comprising:

[0006] A light-emitting element, wherein the light-emitting element is used to emit light;

[0007] An aperture stop is disposed in the propagation path of the light emitted by the light-emitting element, and the aperture stop is used to limit the width of the light emitted by the light-emitting element and passing through the aperture stop;

[0008] A beam splitter is disposed on the propagation path of the light emitted by the aperture, and is used to disperse the light emitted by the aperture into multiple wavelengths.

[0009] A chiral photodetector is disposed on the propagation path of the light rays dispersed by the beam splitter. The chiral photodetector is used to receive the light rays dispersed by the beam splitter and convert them into electrical signals. The chiral photodetector is used to identify circularly polarized light or elliptically polarized light and convert the circularly polarized light or elliptically polarized light into electrical signals.

[0010] In one embodiment, the spectrometer further includes a polarization element disposed on the propagation path of the light rays dispersed by the beam splitter, and the polarization element is used to polarize the light rays dispersed by the beam splitter.

[0011] The spectrometer also includes a phase element, which is disposed on the propagation path of the light emitted by the polarization element. The phase element is used to generate a phase delay in the light formed by the polarization process of the polarization element in order to convert it into circularly polarized light or elliptically polarized light.

[0012] In one embodiment, the polarizing element includes an absorbing polarizer, a thin-film polarizer, or a wire grid polarizer; and / or,

[0013] The phase element comprises a quarter glass slide.

[0014] In one embodiment, the light-emitting element includes a light source for emitting circularly polarized light or elliptically polarized light.

[0015] In one embodiment, the chiral photodetector includes a substrate, a first electrode, a second electrode, and a photosensitive layer;

[0016] At least one of the first electrode and the second electrode is disposed on the substrate;

[0017] The photosensitive layer is disposed on the substrate and connected between the first electrode and the second electrode. The photosensitive layer is used to absorb light signals and form electron-hole pairs. The first electrode and the second electrode are used to form an electric field with the photosensitive layer. The electric field is used to separate the electron-hole pairs into electrons and holes and cause one of the electrons and holes to migrate to the first electrode and the other to migrate to the second electrode.

[0018] In one embodiment, the photosensitive layer comprises a chiral lead sulfide quantum dot film or a chiral lead sulfide nanowire film. The chiral lead sulfide quantum dot film comprises periodically arranged chiral ligands and periodically arranged lead sulfide quantum dots, wherein the chiral ligands are bonded to the lead sulfide quantum dots. The chiral lead sulfide nanowire film comprises directionally arranged chiral ligands and directionally arranged lead sulfide nanowires, wherein the chiral ligands are bonded to the lead sulfide nanowires. The chiral lead sulfide quantum dot film or the chiral lead sulfide nanowire film is used to convert circularly polarized light or elliptically polarized light into electron-hole pairs; and / or,

[0019] The chiral photodetector further includes a hole transport layer and an electron transport layer. One of the hole transport layer and the electron transport layer is disposed between the first electrode and the quantum dot film, and the other is disposed between the second electrode and the quantum dot film. The hole transport layer is used to transport the holes, and the electron transport layer is used to transport the electrons to accelerate the separation of the electron-hole pairs.

[0020] In one implementation, the beam-splitting element includes a prism or a grating; and / or,

[0021] The light-emitting element includes a xenon lamp or a halogen lamp.

[0022] In one embodiment, the spectrometer further includes a focusing element disposed on the propagation path of the light rays dispersed by the beam splitter, the focusing element being used to converge the light rays onto the polarization element.

[0023] In one embodiment, the spectrometer further includes a collimating element disposed on the propagation path of the light emitted from the aperture, the collimating element being located between the aperture and the beam splitter, and the collimating element being used to adjust the light passing through the aperture into mutually parallel light rays.

[0024] In one implementation, the chiral photodetector includes a single-point chiral photodetector, a linear array chiral photodetector, or a planar array chiral photodetector; and / or,

[0025] The spectrometer also includes a controller for receiving and analyzing electrical signals emitted by the photodetector.

[0026] The beneficial effects of this application are: the spectrometer provided in this application embodiment can identify and detect circularly polarized light or elliptically polarized light by setting a chiral photodetector, so that the spectrometer does not need to frequently replace the detector when performing detection, thereby improving the detection efficiency of the spectrometer and reducing the detection cost. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0028] Figure 1 This is a schematic diagram of the structure of the spectrometer provided in the embodiments of this application;

[0029] Figure 2This is a schematic diagram of the structure of a spectrometer using a single-point chiral photodetector provided in an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the structure of a spectrometer employing a linear array chiral photodetector provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of a spectrometer employing a planar array chiral photodetector provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures: 100, light-emitting element; 200, aperture; 300, collimating element; 400, beam-splitting element; 500, focusing element; 600, polarizing element; 700, phase element; 800, chiral photodetector; 810, single-point chiral photodetector; 820, linear array chiral photodetector; 830, area array chiral photodetector. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0036] Please see Figures 1-4 As shown, the spectrometer provided in this application includes a light-emitting element 100, an aperture 200, a spectrophotometer 400, and a chiral photodetector 800.

[0037] The light-emitting element 100 is used to emit light to provide incident light for the spectrometer.

[0038] An aperture 200 is disposed in the propagation path of the light emitted by the light-emitting element 100. The aperture 200 is used to limit the width of the light emitted by the light-emitting element 100 and passing through the aperture 200. The aperture 200 is used to limit the width of the light emitted by the light-emitting element 100 and passing through the aperture 200, thereby controlling the spectral resolution.

[0039] The beam splitter 400 is disposed in the propagation path of the light irradiated by the aperture 200, and is used to disperse the light irradiated by the aperture 200 into multiple wavelengths. The beam splitter 400 disperses the light irradiated by the aperture 200 in space according to wavelength into multiple beams to form a spectrum.

[0040] A chiral photodetector 800 is positioned along the propagation path of the light dispersed by the beam-splitting element 400. The chiral photodetector 800 receives the dispersed light and converts it into an electrical signal. It is used to identify circularly polarized or elliptically polarized light and convert it back into an electrical signal. By incorporating the chiral photodetector 800, the spectrometer gains the ability to identify circularly polarized or elliptically polarized light, thus solving the technical problem that spectrometers cannot directly detect circularly polarized or elliptically polarized light.

[0041] In one embodiment, the spectrometer further includes a polarization element 600, which is disposed in the propagation path of the light rays dispersed by the beam splitter 400. The polarization element 600 is used to polarize the light rays dispersed by the beam splitter 400. The polarization element 600 allows linearly polarized light of a specific direction in the light rays dispersed by the beam splitter to pass through, thereby converting the light rays dispersed by the beam splitter 400 into linearly polarized light, so that the phase element 700 can perform phase processing on the linearly polarized light.

[0042] By placing the polarizing element 600 along the propagation path of the light dispersed by the beam splitter 400, and since the light has already been dispersed by the beam splitter 400, the polarizing element can then adjust the polarization of the light at a specific wavelength, reducing light loss and improving the signal-to-noise ratio. Simultaneously, because the beam splitter 400 has already dispersed the light, the polarizing element 600 can effectively filter out non-target light, reducing its influence on the detector and thus improving measurement accuracy.

[0043] In one implementation, the phase element 700 is disposed in the propagation path of the light emitted by the polarization element 600. The phase element 700 is used to generate a phase delay in the light formed by the polarization treatment of the polarization element 600, thereby converting it into circularly polarized light or elliptically polarized light. When the incident light is non-circularly polarized light or elliptically polarized light, through the arrangement of the polarization element 600 and the phase element 700, when the light after being dispersed by the dispersion element passes through the polarization element 600, the polarization element 600 polarizes the light so that linearly polarized light passes through the polarization element 600. When the linearly polarized light passes through the phase element 700, the phase element 700 generates a phase delay in the light, thereby converting it into circularly polarized light or elliptically polarized light, and then the circularly polarized light or elliptically polarized light illuminates the chiral photodetector 800, thereby realizing the detection of circularly polarized light or elliptically polarized light by the spectrometer.

[0044] In one embodiment, the polarizing element 600 includes an absorbing polarizer, a thin-film polarizer, or a wire grid polarizer, which polarizes light by allowing linearly polarized light in a specific direction to pass through.

[0045] In one implementation, the phase element 700 includes a quarter-wave plate. When linearly polarized light passes through the quarter-wave plate, a relative quarter-wavelength phase delay is generated between the two polarization components of the linearly polarized light whose vibration directions are perpendicular to each other, thereby changing the polarization state of the light and causing the linearly polarized light to be converted into circularly polarized light or elliptically polarized light after passing through the quarter-wave plate.

[0046] In one implementation, the light-emitting element 100 is a light source for emitting circularly polarized light or elliptically polarized light. When the light-emitting element 100 directly emits circularly polarized light or elliptically polarized light, there is no need to set up a polarization element 600 and a phase element 700 in the spectrometer to process the light.

[0047] In one implementation, the light-emitting element 100 includes a xenon lamp or a halogen lamp. Compared to conventional light sources, xenon lamps or halogen lamps can excite a wider range of spectra and higher light intensity output, resulting in a clearer signal and a higher signal-to-noise ratio in the spectrum formed by the subsequent beam splitter 400. The light emitted by the light-emitting element 100 then needs to be processed by the polarization element 600 and the phase element 700 before illuminating the chiral photodetector 800. In another implementation, the beam splitter 400 includes a prism or a grating. The grating has a beam splitting range of 200nm-400nm, and a blazed grating or a reflection grating is used to reduce light power loss. The grating utilizes the principle of multi-slit diffraction to decompose light into a spectrum. The grating is a flat glass or metal sheet with a large number of parallel slits of equal width and narrowness. Parallel light passing through each slit of the grating undergoes diffraction, and the interference between the slits causes spectral lines of different wavelengths to appear at different positions, thus forming a spectrum.

[0048] In one embodiment, the spectrometer also includes a focusing element 500, which is disposed on the propagation path of the light rays dispersed by the beam splitting element 400. The focusing element 500 is used to converge the light rays onto the polarization element 600 to improve the efficiency of the polarization element 600 in polarizing the light rays.

[0049] In one embodiment, the focusing element 500 includes at least one lens, which focuses the light rays dispersed by the beam splitter 400 onto the polarizing element 600, so that the polarizing element 600 can receive and polarize the light rays. In the above technical solution, at least one lens is used as the focusing element 500 to focus the light rays. Of course, in specific applications, as an alternative embodiment, the focusing element 500 includes at least one mirror, which focuses the light rays dispersed by the beam splitter 400 onto the polarizing element 600, so that the polarizing element can polarize the light rays.

[0050] In one embodiment, the spectrometer also includes a collimating element 300, which is disposed on the propagation path of the light emitted from the aperture 200. The collimating element 300 is located between the aperture 200 and the beam splitter 400. The collimating element 300 is used to adjust the light passing through the aperture 200 into parallel light rays so that the beam splitter 400 can perform beam splitting on the light.

[0051] In one implementation, the collimating element 300 includes a single lens that adjusts the light emitted from the aperture 200 and aligns the light into parallel rays. Alternatively, in a specific application, the collimating element 300 may include a single mirror that reflects the light into parallel rays, facilitating beam splitting by the beam splitting element 400.

[0052] In one implementation, the chiral photodetector 800 includes a substrate, a first electrode, a second electrode, and a photosensitive layer.

[0053] At least one of the first electrode and the second electrode is disposed on the substrate. The first electrode and the second electrode are used to form an electric field with the photosensitive layer. The electric field helps to convert light into electron-hole pairs, thereby improving the efficiency of the photodetector in converting circularly polarized or elliptically polarized light into electrical signals.

[0054] A photosensitive layer is disposed on a substrate and connected between a first electrode and a second electrode. The photosensitive layer is used to absorb light signals and form electron-hole pairs. The first electrode and the second electrode are used to form an electric field with the photosensitive layer. The electric field is used to separate the electron-hole pairs into electrons and holes and cause one of the electrons and holes to migrate to the first electrode and the other to migrate to the second electrode, thereby forming a current to achieve photoelectric conversion.

[0055] In the above scheme, the chiral photodetector 800 includes a substrate, a first electrode, a second electrode, and a photosensitive layer. Of course, in specific applications, as an alternative implementation, the chiral quantum photodetector also includes a hole transport layer and an electron transport layer based on the above scheme.

[0056] One of the hole transport layer and the electron transport layer is located between the first electrode and the photosensitive layer, and the other is located between the second electrode and the photosensitive layer. The hole transport layer is used to transport holes to promote the separation of electron-hole pairs (holes are positively charged carriers), while the electron transport layer is used to transport electrons to accelerate the separation of electron-hole pairs. When circularly polarized or elliptically polarized light shines on the photosensitive layer, electron-hole pairs are generated. The hole transport layer maintains the electric field and promotes the separation of electron-hole pairs while transporting holes, and the electron transport layer maintains the electric field and promotes the separation of electron-hole pairs while transporting electrons. At the same time, the electron transport layer effectively prevents holes from flowing to the electron transport layer, and the hole transport layer effectively blocks electrons from flowing to the hole transport layer, thereby improving the photoelectric conversion efficiency of the photodetector.

[0057] In one implementation, the photosensitive layer includes a chiral lead sulfide quantum dot film, which comprises periodically arranged chiral ligands and periodically arranged lead sulfide quantum dots, with the chiral ligands bonded to the lead sulfide quantum dots. A chiral lead sulfide nanowire film comprises directionally arranged chiral ligands and directionally arranged lead sulfide nanowires, with the chiral ligands bonded to the lead sulfide nanowires. The chiral lead sulfide quantum dot film is used to convert circularly polarized or elliptically polarized light into electron-hole pairs. Specifically, the chiral lead sulfide quantum dot film includes periodically arranged lead sulfide quantum dots bonded to chiral ligands. When circularly polarized or elliptically polarized light is incident on the lead sulfide quantum dots bonded to chiral ligands, the absorption effect of light with the same chirality is enhanced, and the photocurrent generated by the chiral photodetector 800 is enhanced, thereby achieving a response to circularly polarized or elliptically polarized light.

[0058] In the above scheme, the photosensitive layer includes a chiral lead sulfide quantum dot film. However, in specific applications, as an alternative implementation, the photosensitive layer includes a chiral lead sulfide nanowire film. The chiral lead sulfide nanowire film is used to convert circularly polarized or elliptically polarized light into electron-hole pairs. Specifically, the chiral lead sulfide nanowire film includes directionally aligned lead sulfide nanowires bound to chiral ligands. When circularly polarized or elliptically polarized light is incident on the lead sulfide nanowires bound to chiral ligands, the absorption effect of light with the same chirality is enhanced, and the photocurrent generated by the chiral photodetector 800 is enhanced, thereby achieving a response to circularly polarized or elliptically polarized light.

[0059] As one implementation, the chiral photodetector 800 includes a single-point chiral photodetector 810, which has the advantages of fast response speed, high sensitivity and low cost, and can achieve low-cost spectral response.

[0060] In the above scheme, the chiral photodetector 800 includes a single-point chiral photodetector 810. Of course, in specific applications, as an alternative implementation, the chiral photodetector 800 includes a linear array chiral photodetector 820, which can achieve more precise spectral detection compared to the chiral photodetector 800.

[0061] Of course, in specific applications, as an alternative implementation, the chiral photodetector 800 may also include an array chiral photodetector 830, which can be used for imaging processing compared to single-point chiral quantum photodetectors and linear array chiral quantum photodetectors.

[0062] In one implementation, the spectrometer also includes a controller, which receives and analyzes the electrical signals emitted by the photodetector to extract light intensity information and generate a spectrum or spectral curve based on the processed data.

[0063] In this embodiment, the spectrometer emits light through a light-emitting element 100. The light illuminates an aperture 200, which limits the width of the light, thereby controlling the spectral resolution. After passing through the aperture 200, the light illuminates a collimating element 300, which adjusts the light beam into parallel rays for subsequent processing. A beam splitter 400 disperses the light adjusted by the collimating element 300 into multiple wavelengths to form a spectrum. A focusing element 500 focuses the light dispersed by the beam splitter 400 onto a polarizing element. The polarizing element polarizes the target linearly polarized light in the dispersed light and illuminates the resulting linearly polarized light onto a phase element 700. The phase element 700 creates a quarter-wavelength phase delay between the two polarization components of the linearly polarized light whose vibration directions are perpendicular to each other, thereby changing the polarization state of the linearly polarized light into circularly polarized or elliptically polarized light. When circularly polarized or elliptically polarized light shines on the chiral photodetector 800, the light is absorbed and converted into electron-hole pairs by a chiral lead sulfide quantum dot film or chiral lead sulfide nanowire film disposed within the chiral photodetector 800, generating a current within the detector. The controller receives this current and extracts the intensity information of the circularly or elliptically polarized light, generating a spectrum or spectral curve based on the processed data.

[0064] In summary, the spectrometer provided in this application embodiment enables the spectrometer to identify and detect circularly polarized light or elliptically polarized light by setting the chiral photodetector 800. This eliminates the need for frequent detector replacements during detection, thereby improving the detection efficiency of the spectrometer and reducing detection costs.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spectrometer, characterized in that, include: A light-emitting element (100) is used to emit light; Aperture (200), wherein the aperture (200) is disposed on the propagation path of the light emitted by the light-emitting element (100), and the aperture (200) is used to limit the width of the light emitted by the light-emitting element (100) and passing through the aperture (200); A beam splitter (400) is disposed on the propagation path of the light irradiated by the aperture (200) and is used to disperse the light irradiated by the aperture (200) into multiple wavelengths. A chiral photodetector (800) is disposed on the propagation path of the light rays dispersed by the beam splitter (400). The chiral photodetector (800) is used to receive the light rays dispersed by the beam splitter (400) and convert them into electrical signals. The chiral photodetector (800) is used to identify circularly polarized light or elliptically polarized light and convert the circularly polarized light or elliptically polarized light into electrical signals.

2. The spectrometer according to claim 1, characterized in that, The spectrometer also includes a polarization element (600), which is disposed on the propagation path of the light rays dispersed by the beam splitter (400). The polarization element (600) is used to polarize the light rays dispersed by the beam splitter (400). The spectrometer also includes a phase element (700), which is located on the propagation path of the light emitted by the polarization element (600). The phase element (700) is used to generate a phase delay in the light formed by the polarization process of the polarization element (600) to convert it into circularly polarized light or elliptically polarized light.

3. The spectrometer according to claim 2, characterized in that, The polarizing element (600) includes an absorbing polarizer, a thin-film polarizer, or a wire grid polarizer; and / or, The phase element (700) comprises a quarter glass slide.

4. The spectrometer according to claim 1, characterized in that, The light-emitting element (100) includes a light source for emitting circularly polarized light or elliptically polarized light.

5. The spectrometer according to any one of claims 1 to 4, characterized in that, The chiral photodetector (800) includes a substrate, a first electrode, a second electrode, and a photosensitive layer; At least one of the first electrode and the second electrode is disposed on the substrate; The photosensitive layer is disposed on the substrate and connected between the first electrode and the second electrode. The photosensitive layer is used to absorb light signals and form electron-hole pairs. The first electrode and the second electrode are used to form an electric field with the photosensitive layer. The electric field is used to separate the electron-hole pairs into electrons and holes and cause one of the electrons and holes to migrate to the first electrode and the other to migrate to the second electrode.

6. The spectrometer according to claim 5, characterized in that, The photosensitive layer comprises a chiral lead sulfide quantum dot film or a chiral lead sulfide nanowire film. The chiral lead sulfide quantum dot film comprises periodically arranged chiral ligands and periodically arranged lead sulfide quantum dots, with the chiral ligands bonded to the lead sulfide quantum dots. The chiral lead sulfide nanowire film comprises directionally arranged chiral ligands and directionally arranged lead sulfide nanowires, with the chiral ligands bonded to the lead sulfide nanowires. The chiral lead sulfide quantum dot film or the chiral lead sulfide nanowire film is used to convert circularly polarized light or elliptically polarized light into electron-hole pairs; and / or, The chiral photodetector (800) further includes a hole transport layer and an electron transport layer. One of the hole transport layer and the electron transport layer is disposed between the first electrode and the quantum dot film, and the other is disposed between the second electrode and the quantum dot film. The hole transport layer is used to transport the holes, and the electron transport layer is used to transport the electrons to accelerate the separation of the electron-hole pairs.

7. The spectrometer according to any one of claims 1 to 3, characterized in that, The beam-splitting element (400) includes a prism or a grating; and / or, The light-emitting element (100) includes a xenon lamp or a halogen lamp.

8. The spectrometer according to claim 2, characterized in that, The spectrometer also includes a focusing element (500), which is located on the propagation path of the light rays dispersed by the beam splitter (400). The focusing element (500) is used to converge the light rays onto the polarization element (600).

9. The spectrometer according to claim 8, characterized in that, The spectrometer also includes a collimating element (300), which is disposed on the propagation path of the light emitted from the aperture (200). The collimating element (300) is located between the aperture (200) and the beam splitter (400). The collimating element (300) is used to adjust the light passing through the aperture (200) into parallel light.

10. The spectrometer according to any one of claims 1 to 4, characterized in that, The chiral photodetector (800) includes a single-point chiral photodetector (810), a linear array chiral photodetector (820), or a planar array chiral photodetector (830); and / or, The spectrometer also includes a controller for receiving and analyzing electrical signals emitted by the photodetector.

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