Spectrum device

Abstract

The utility model provides a spectrum device which comprises a shell, a dispersion element and a detector, the shell is provided with a containing space, an entrance slit is formed in the shell, incident light enters the containing space through the entrance slit, the dispersion element is opposite to the entrance slit, the dispersion element splits the incident light, and the detector is used for detecting the incident light. The detector receives an incident light signal, and the dispersion element and the detector are arranged in the accommodating space of the shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of spectrum detection technology especially relates to a spectrum device. BACKGROUND

[0002] The description here only provides the background information related to the utility model and does not necessarily constitute the prior art.

[0003] The spectrometer is the scientific instrument that the light of complex component is decomposed into the spectral line, is constituted by prism or diffraction grating etc., can measure the light of object surface reflection using the spectrometer. The seven color light in the sunlight is the part that the naked eye can divide (visible light), but if the sunlight is decomposed through the spectrometer, arranges according to wavelength, the visible light only occupies the very small range in the spectrum, and the rest is the spectrum that the naked eye cannot distinguish, such as infrared, microwave, ultraviolet, X-ray etc. Through the capture of light information of the spectrometer, the photographic negative is developed, or the numerical instrument display and analysis are displayed and automatically displayed by computerization, thereby measuring what element is contained in the article. This technique has been widely applied in the detection of air pollution, water pollution, food hygiene, metal industry etc.

[0004] But in the prior art, in order to ensure that the spectrometer has better resolution, generally need to ensure the performance of each device and the corresponding installation precision etc., also need long enough light path simultaneously. Therefore, the existing spectrometer not only is higher in cost, and the overall size is large. In the existing spectrometer, there are multiple elements, and the light path is long. On the one hand, the structure of the existing spectrometer is high in installation precision due to more devices, which undoubtedly increases the manufacturing difficulty and cost; on the other hand, the requirement of multiple device structures and long light path also affects the large size of the overall spectrometer. SUMMARY

[0005] One main advantage of the utility model lies in providing a spectrum device, wherein the design of the spectrum device cancels the collimation element, and on this basis, the performance of the spectrometer is kept as good as possible.

[0006] Another advantage of the utility model lies in providing a spectrum device, wherein the spectrum device is smaller in size under the premise of ensuring that the resolution meets the demand, which is conducive to realizing the miniaturization of the structure.

[0007] Another advantage of the utility model lies in providing a spectrum device, wherein the resolution is improved under the premise of ensuring the size, which is conducive to improving the working performance of the spectrum device.

[0008] Another advantage of the utility model lies in providing a spectrum device, wherein the optical assembly is arranged in front of the incident slit to collect light, so that the identification range can be expanded, and the use of the spectrometer is facilitated.

[0009] According to one aspect of the present application, a spectral device capable of achieving the aforementioned objects and other objects and advantages comprises:

[0010] A housing having a receiving space, and the housing is formed with an entrance slit, and the entrance slit is used for allowing the incident light to enter the receiving space, wherein the entrance slit simultaneously plays a diffraction role and a geometric role for the incident light;

[0011] A dispersing element and a detector, wherein the dispersing element is opposite to the entrance slit, the dispersing element disperses the incident light, and the detector receives the incident light signal, and the dispersing element and the detector are arranged in the receiving space of the housing.

[0012] According to one embodiment of the present application, the spectral device further comprises at least one optical element, wherein the at least one optical element is located at the front end of the light incident direction of the entrance slit, and the incident light passes through the optical element and then passes through the entrance slit to reach the dispersing element.

[0013] According to one embodiment of the present application, the optical element is selected from the element combination consisting of a lens, a light homogenizing element and a microlens array.

[0014] According to one embodiment of the present application, the housing is further provided with a mounting cavity, wherein the mounting cavity is in communication with the entrance slit, and the optical element is fixed in the mounting cavity of the housing.

[0015] According to one embodiment of the present application, the depth of the entrance slit is 1.5-4 mm.

[0016] According to one embodiment of the present application, the depth of the entrance slit is 2-3 mm.

[0017] According to one embodiment of the present application, the width of the entrance slit is 0.1-0.5 mm.

[0018] According to one embodiment of the present application, the line connecting the center of the entrance slit with the center of the dispersing element and the line connecting the center of the detector with the center of the dispersing element forms an angle of 30-120°.

[0019] According to one embodiment of the present application, the spectral device further comprises a processing unit, wherein the processing unit is electrically connected with the detector.

[0020] According to one embodiment of the present application, the spectral device further comprises at least one collimation assembly, wherein the collimation assembly is arranged behind the light exit side of the entrance slit, that is, the incident light incident through the entrance slit is collimated by the collimation assembly and then irradiated on the dispersing element.

[0021] According to one embodiment of the present application, the collimation assembly comprises a first collimation component, a second collimation component, and a first reflection component and a second reflection component arranged between the first collimation component and the second collimation component, wherein the first reflection component is located at the rear end of the light exit direction of the first collimation component, the second reflection component is located at the front end of the light incidence direction of the second collimation component, and the first reflection component and the second reflection component are oppositely arranged. The first collimation component is located behind the entrance slit, the light emitted from the entrance slit enters the first collimation component, is collimated by the first collimation component to reach the first reflection component, and forms a first collimated light path between the first collimation component and the first reflection component.

[0022] According to one embodiment of the present application, the spectral device further comprises at least one light path adjusting assembly, wherein the light path adjusting assembly is arranged behind the light exit direction of the entrance slit, the light path adjusting assembly comprises a first reflection unit and a second reflection unit, wherein the first reflection unit is opposite to the second reflection unit, the first reflection unit reflects the incident light to the second reflection unit, and a reflection light path is formed between the first reflection unit and the second reflection unit, and the second reflection unit reflects the incident light to the dispersion element, and a second reflection light path is formed between the second reflection unit and the dispersion element.

[0023] According to one embodiment of the present application, the first reflection component has a first reflection surface, and the second reflection component has a second reflection surface, wherein the first reflection surface of the first reflection component and the second reflection surface of the second reflection component are oppositely arranged.

[0024] According to one embodiment of the present application, the direction of the first collimated light path formed by the first collimation component is parallel or substantially parallel to the direction of the second collimated light path formed by the second collimation component.

[0025] According to one embodiment of the present application, the plane in which the first reflection surface of the first reflection component is located and the plane in which the second reflection surface of the second reflection component is located are parallel to each other.

[0026] According to one embodiment of the present application, the collimation assembly further comprises a first substrate and a second substrate, wherein the first collimation component is arranged on the first substrate, and the second collimation component is arranged on the second substrate.

[0027] The further purposes and advantages of the present application will be fully apparent from the following description and drawings.

[0028] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The technical solutions of the present application will be further described in detail below in combination with the drawings and embodiments. In the drawings, the same reference signs are used to represent the same components unless otherwise specified. Among them:

[0030] Figure 1 It is a whole structure schematic view of a spectrum device according to the first preferred embodiment of the present application.

[0031] Figure 2 It is a partial structure schematic view of the shell of the spectrum device manufactured according to the first preferred embodiment of the present application.

[0032] Figure 3 It is a schematic view of the optical element of the spectrum device according to the first preferred embodiment of the present application.

[0033] Figure 4 It is a structure schematic view of the slit of the spectrum device according to the first preferred embodiment of the present application.

[0034] Figure 5 It is a whole structure schematic view of a spectrum device according to the second preferred embodiment of the present application.

[0035] Figure 6 It is a structure schematic view of another alternative embodiment of a spectrum device according to the second preferred embodiment of the present application. DETAILED DESCRIPTION

[0036] The following description is provided to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0037] Those skilled in the art should understand that in the disclosure of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0038] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0039] Referring to the drawings of the present application Figures 1 to 4 The spectral device according to the first preferred embodiment of the present application is illustrated in the following description. The spectral device includes a housing 10, a dispersive element 20 and a detector 30 arranged in the housing 10, and an entrance slit 40 formed in the housing 10, wherein the housing 10 has a containing space 101, and the dispersive element 20 and the detector 30 are contained in the containing space 101 by the housing 10. The entrance slit 40 is formed in the housing 10 and communicates with the containing space 101 of the housing 10, and the entrance slit 40 is opposite to the dispersive element 20, that is, the incident light reaches the dispersive element 20 through the entrance slit 40.

[0040] Preferably, in this preferred embodiment of the present application, the dispersive element 20 and the detector 30 are fixedly arranged in the containing space 101 of the housing 10.

[0041] It is worth mentioning that the dispersive element 20 can be implemented as a diffraction grating, a blazed grating, etc., which mainly performs light splitting on incident light. The detector 30 array can be implemented as a CCD chip, a CMOS chip or other detectors, and can also be an imaging module, which can receive incident light signals.

[0042] The spectral device further comprises at least one optical element 50, wherein the at least one optical element 50 is located at the front end of the light incident direction of the entrance slit 40, that is, the incident light passes through the optical element 50 and then passes through the entrance slit 40 to reach the dispersive element 20, wherein the optical element 50 can be implemented as a lens, a light homogenizing element, a microlens array, etc.

[0043] It can be understood that due to the small size of the entrance slit 40, it will result in a small recognition range of the corresponding spectral device, that is, the to-be-recognized object must be located within the recognition range of the entrance slit 40, which undoubtedly is not conducive to the use of the spectral device. Therefore, in this preferred embodiment of the present application, the optical element 50 is arranged in front of the light incident direction of the entrance slit 40 to collect light, so that the recognition range can be expanded, facilitating the use of the spectral device.

[0044] Preferably, the optical element 50 is arranged in the housing 10, that is, the optical element 50 is supported by the housing in front of the entrance slit 40.

[0045] In detail, the housing 10 is further provided with a mounting cavity 102, wherein the mounting cavity 102 is in communication with the incident slit 40 and located at the front end of the light incident direction of the incident slit 40, and the optical element 50 is fixed in the mounting cavity 102 of the housing 10. As preferred, the mounting cavity 102 and the incident slit 40 are integrally formed in the housing 10, and the optical element 50 is mounted in the mounting cavity 102. The size of the mounting cavity 102 is adapted to the optical element 50.

[0046] It can be understood that the mounting cavity 102 is located outside the housing 10, that is, the mounting cavity 102 is a half-open slot structure formed on the outside of the housing 10, the optical element 50 is fixed in the mounting cavity 102, and one side of the optical element 50 faces the external environment. In individual embodiments, the mounting cavity 102 can also be formed on the inside of the housing 10, that is, the optical element 50 is attached to the inside of the housing 10, which can further save space and facilitate miniaturization.

[0047] In individual examples of the present application, the optical element 50 is detachably arranged in the mounting cavity 102 of the housing 10, and the type of the optical element 50 can be replaced according to different needs; or the optical element 50 is not used. For example, in a weak light environment, the optical element 50 can be removed so that light can directly pass through the incident slit 40 to avoid the loss of incident light energy by the optical element 50. For example, in the case of focusing, a lens, a microlens array or other optical elements are installed in the mounting cavity; and for the case of homogenizing the incident light, a homogenizing sheet can be installed in the mounting cavity.

[0048] The spectral device further comprises a processing unit 60, wherein the processing unit 60 is electrically connected with the detector 30, wherein the processing unit 60 can be arranged inside the housing 10, or can be arranged outside the housing 10 of the spectral device, and no limitation is made thereto.

[0049] As Figure 1As shown, in this preferred embodiment of the present application, the optical element 50 is preferably a light homogenizer, which is attached to the mounting cavity 102 of the housing 10. The entrance slit 40 is directly opposite the dispersive element 20, and light entering the entrance slit 40 through the optical element 50 reaches the surface of the dispersive element 20. It is understood that the incident light becomes more uniform after passing through the light homogenizer, and then enters the dispersive element through the entrance slit 40. The dispersive element disperses the incident light, dispersing the complex light entering the slit into monochromatic light, which is then reflected at different angles onto the detector 30. The detector 30 receives the light source signal and converts it into an electrical signal, which is transmitted to the computing unit. The computing unit analyzes the signal to obtain complex light spectrum information. The analysis results are stored in the processing unit or output through a data transmission interface provided thereon.

[0050] It should be understood that in this preferred embodiment of the present application, if the size of the input slit 40 and the distance from the light exit of the input slit 40 to the surface of the dispersion element allow the spectroscopic device to be minimized, the performance of the spectroscopic device will not be significantly affected. For example, the spectrometer resolution is required to be within 1-10 nm, or within 5 nm, or even within 1 nm.

[0051] It is understood that the input slit 40 is a through-hole formed in the side or top of the housing 10. The input slit 40 comprises a slit channel 401, an input port 402 at the input end of the slit channel 401, and an output port 403 at the output end of the slit channel 401. The width, depth, and length of the slit channel 401 of the input slit 40 are assumed to be a, b, and c, where the depth refers to the distance from the input port 402 to the output port 403 along the incident direction of the incident light. The distance from the output port 403 of the input slit 40 to the surface of the dispersive element 20 is l. Since the length c generally needs to match the length of the diffraction grating and has little impact on the optical path design and performance of the spectroscopic device, the relationship between the width a, depth b, and distance l of the input slit 40 is primarily considered. The distance l is generally determined according to the size requirements of the spectral device, the size of the incident slit 40, and the limitations of the dispersion element 20. That is, if the distance l is too small, the incident light cannot be effectively diffused, resulting in only a small part of the grating working, which is not conducive to ensuring spectral accuracy; if the distance l is too large, the size of the entire spectral device will be too large. Therefore, when the size of the spectral device is determined, the dispersion element 20 can be placed as far away from the incident slit 40 as possible.

[0052] Further, in the preferred embodiment of the present application, the incident slit 40 without lens collimates the light path, when the incident slit 40 is relatively large, the geometric size of the incident slit 40 controls the size of the exit angle. As shown in Figure 4 The incident angle is determined by the width and depth of the incident slit 40, tan (a / 2) = b / a. But when the exit angle is too large (> 10°), the spectral bandwidth exceeds 20 nm, affecting the spectral accuracy, that is, the resolution is poor. This effect can be defined as a geometric effect, which can be understood to some extent as the incident slit controls the exit angle and other functions in the geometric sense.

[0053] When the width of the incident slit 40 is reduced to the order of microns, the diffraction of the incident slit 40 will play a major role. a (sin a + sini) = mλ, the 0th order exit angle of the main energy is <0.5 degrees, and the spectral bandwidth is less than 1 nm, but at this time the too small incident slit 40 leads to a decrease in light energy transmission, and the system signal-to-noise ratio decreases. The diffraction effect of light passing through the incident slit 40 needs to be calculated, for example, when the collimated light is incident, the angle of the diffracted light is determined by the incident slit width a and the main wavelength λ.

[0054] For example, the 0th order main maximum angle width The corresponding spectral width Where N is the number of grating lines, i is the incident angle; the spectral width Δλ can be further understood as the resolution of the spectrum. Therefore, the larger the number of grating lines N, the larger the incident angle i, or the smaller the Δθ, the smaller the corresponding resolution, and the higher the accuracy of the spectral device. However, the smaller the main maximum angle width Δθ requires the larger the width of the incident slit 40, which indicates that the effect of the incident slit 40 in the present application cannot be explained by only one of the geometric effect and the diffraction effect.

[0055] In the preferred embodiment of the present application, the incident slit 40 produces a geometric effect and a diffraction effect on the incident light, and under the joint action of the two, the structure of the spectral device can be simplified, and the optical path structure of the spectral device can be optimized. That is, the spectral device of the preferred embodiment of the present application can realize the requirements of the spectral device for resolution without the need for a collimating lens, and simplifies the structure, which is conducive to the miniaturization of the structure.

[0056] Specifically, in the preferred embodiment of the present application, the incidence slit 40 formed in the shell 10 can control the size of the entire optical path; when the depth of the incidence slit 40 is too small, the geometric effect is large, which can make the exit angle large, resulting in a decrease in resolution; and when the slit depth is too large, the intensity of the incident light is too weak, which is not conducive to subsequent detection. Therefore, in the present application, the depth of the incidence slit 40 is controlled to be 1.5-4 mm. Preferably, the depth b of the incidence slit 40 is 2-3 mm, for example, 2 mm, 2.5 mm, or 3 mm. It should be noted that the depth b of the incidence slit 40 is influenced by the size of the width a of the incidence slit 40 to some extent, and the range of the depth b of the incidence slit 40 in the present application is determined by the width a of the incidence slit 40 in the present application to some extent.

[0057] In the preferred embodiment of the present application, the incidence slit 40 formed in the shell 10 can control the size of the entire optical path; when the width of the incidence slit 40 is too large, the slit will not produce a diffraction effect; and when the slit width is too small, the intensity of the incident light will be too weak, which is not conducive to subsequent detection. When the spectral resolution reaches 1-5 nm, the incidence slit 40 of the present application needs to control the exit angle to be about 1°, at which time the width a of the incidence slit 40 can be set to 0.1-0.5 mm, at which time the geometric effect and the diffraction effect play a common role, and the width of 0.1-0.5 mm can effectively ensure the light efficiency, that is, ensure that the light transmittance is not too low, and also can produce a geometric effect.

[0058] In the preferred embodiment of the present application, the incident light first enters the optical element 50, is homogenized by the optical element (a homogenizing sheet), then enters the incidence slit 40, is emitted after the common action of the geometric effect and the diffraction effect, reaches the dispersion element 20 (a grating), is dispersed by the dispersion element, and is finally received by the detector 30.

[0059] It should be noted that the line connecting the center of the incidence slit 40 and the center of the dispersion element 20 and the line connecting the center of the detector 30 and the center of the dispersion element 20 are 30-120° in the present application, that is, the overall size of the spectral device can be controlled by folding the optical path. Preferably, the line connecting the center of the incidence slit 40 and the center of the dispersion element 20 and the line connecting the center of the detector 30 and the center of the dispersion element 20 are 90°.

[0060] For example, but not limited, the dispersion element 20 is implemented as a blazed grating, when the diffraction grating is 1200 lines / mm, the line connecting the center of the incident slit 40 and the center of the dispersion element 20 and the line connecting the center of the detector 30 and the center of the dispersion element 20 can be set to 80°, and the spectral resolution is higher.

[0061] The shell 10 of the preferred embodiment of the utility model can be integrally processed, or can be formed by assembling multiple modules. The shell 10 includes a shell body 11, a support base 12 arranged on the shell body 11, and a support 13 for fixing the dispersion element 20. The shell body 11 of the shell 10 and the support base 12 jointly form the accommodation space 101 of the shell 10. The support base 12 is located below the shell body 11, and the detector 30 and the processing unit 60 are arranged on the support base 12. The support base 12 can also be implemented as a circuit board and electrically connected to the detector 30.

[0062] It is worth mentioning that in the preferred embodiment of the present application, the incident slit 40 is formed on a side wall of the shell body 11, and the height at which the incident slit 40 is located is substantially the same as the height at which the dispersion element 20 is fixed.

[0063] The support 13 is arranged inside the top end of the shell body 11 and opposite to the support base 12. The dispersion element 20 is fixed in the accommodation space 101 by the support 13. It is worth mentioning that in the preferred embodiment of the present application, the support 13 has a fixed support surface, and the fixed support surface of the support 13 is an inclined surface inclined toward the direction of the incident slit 40, so that the light incident by the incident slit 40 reaches the surface of the dispersion element 20.

[0064] In another optional embodiment of the present application, the detector 30 can also be implemented as an imaging module, which includes a detector and an optical lens located on the light sensing path of the detector. In individual embodiments of the present application, the spectral device can further include a filter between the optical lens and the detector. In order to better receive incident light, the FOV of the imaging module needs to be 40-150°, preferably 45-100°. Further, the imaging module includes a circuit board, and the detector is electrically connected to the circuit board.

[0065] The utility model discloses a spectral device, which comprises a shell 10, an incident slit 40, a dispersion element 20, a detector 30 and a processing unit 60. Figure 5As shown, a spectroscopic device according to a second preferred embodiment of the present application is explained in the following description. The spectroscopic device includes a housing 10, a dispersive element 20 and a detector 30 disposed in the housing 10, and an input slit 40 formed in the housing 10, wherein the housing 10 has a housing space 101, and the dispersive element 20 and the detector 30 are enclosed by the housing 10 in the housing space 101. Unlike the first preferred embodiment described above, the spectroscopic device further includes at least one collimating assembly 70, wherein the collimating assembly 70 is disposed behind the light exit square of the input slit 40. That is, the incident light entering the input slit 40 is collimated by the collimating assembly 70 and then irradiated on the dispersive element 20, wherein the dispersive element 20 disperses the spectral components in different directions. Finally, the focusing imaging system focuses the dispersed light onto the detector array 30 to obtain a spectral distribution.

[0066] Preferably, in this preferred embodiment of the present application, the collimation assembly 70 is disposed in the housing 10 , and the collimation assembly 70 , the dispersion element 20 , and the detector 30 are accommodated in the accommodating space 101 of the housing 10 .

[0067] It should be noted that the collimating lens of existing miniaturized spectroscopic devices can be a reflective collimating lens or a transmissive collimating lens. However, in order to miniaturize the spectroscopic device, it is necessary to reduce the size of the collimating lens or even reduce the performance of the collimating lens and shorten the optical path, which will ultimately affect the performance of the spectroscopic device, such as affecting the resolution.

[0068] In this preferred embodiment of the present application, the collimating component 70 is located between the incident slit 40 and the dispersion element 20, wherein the collimating component 70 is used to collimate the light emitted from the incident slit 40 and adjust the optical path of the emitted light so that the size of the collimating component 70 can be reduced while the effective optical path remains unchanged, thereby achieving miniaturization of the overall structure.

[0069] The light emitted through the incident slit 40 is collimated by the collimating assembly 70 and forms a collimated optical path 701 between the incident slit 40 and the dispersive element 20 , wherein the emitted light reaches the surface of the dispersive element 20 along the collimated optical path 701 .

[0070] The collimating assembly 70 comprises a first collimating member 71, a second collimating member 72, and a first reflecting member 73 and a second reflecting member 74 arranged between the first collimating member 71 and the second collimating member 72, wherein the first reflecting member 73 is located at the rear end of the light exit direction of the first collimating member 71, the second reflecting member 74 is located at the front end of the light incidence direction of the second collimating member 72, and the first reflecting member 73 and the second reflecting member 74 are oppositely arranged. The first collimating member 71 is located behind the entrance slit 40, and the light emitted from the entrance slit 40 enters the first collimating member 71, is collimated by the first collimating member 71, reaches the first reflecting member 73, and forms a first collimating light path 702 between the first collimating member 71 and the first reflecting member 73.

[0071] The first reflecting member 73 reflects the incident light to the second reflecting member 74, and forms a reflected light path 703 between the first reflecting member 73 and the second reflecting member 74. The second reflecting member 74 reflects the incident light to the second collimating member 72, wherein the second collimating member 72 collimates the light reflected by the second reflecting member 74 and emits it to the dispersive element 20, and forms a second collimating light path 704 between the second reflecting member 74 and the second collimating member 72.

[0072] Briefly, in this preferred embodiment of the present application, the incident light enters the first collimating member 71 after passing through the entrance slit 40, is collimated, is reflected by the first reflecting member 73, is further reflected by the second reflecting member 74, enters the second collimating member 72 again, and is collimated again, and then enters the dispersive element 20. That is, the incident light passes through the first collimating member 71 and the second collimating member 72, so that the collimation effect is significantly improved, and then passes through the first reflecting member 73 and the second reflecting member 74, so that the size of the entire collimating assembly is reduced without changing the effective light path distance.

[0073] The first collimating member 71 and the second collimating member 72 can be, but are not limited to, collimating lenses or combinations of multiple collimating lenses. The first reflecting member 73 has a first reflecting surface 730, and the second reflecting member 74 has a second reflecting surface 740, wherein the first reflecting surface 730 of the first reflecting member 73 and the second reflecting surface 740 of the second reflecting member 74 are oppositely arranged.

[0074] Preferably, in this preferred embodiment of the present application, the direction of the first collimating light path 702 formed by the first collimating member 71 is parallel or substantially parallel (including overlapping) to the direction of the second collimating light path 704 formed by the second collimating member 72. It can be understood that the substantially parallel or parallel referred to herein allows an included angle of less than 10 degrees.

[0075] More preferably, the plane in which the first reflecting surface 730 of the first reflecting member 73 is located and the plane in which the second reflecting surface 740 of the second reflecting member 74 is located are parallel to each other, so that the direction of the incident light entering the collimating assembly 70 and the direction of the incident light exiting the collimating assembly 70 can be ensured not to change.

[0076] As preferred, the first collimating light path 702 and the second collimating light path 704 are perpendicular to the reflecting light path 703 respectively.

[0077] The collimating assembly 70 further comprises a first substrate 75 and a second substrate 76, wherein the first collimating member 71 is arranged on the first substrate 75, and the second collimating member 72 is arranged on the second substrate 76. The first substrate 75 and the second substrate 76 are oppositely arranged, and the first substrate 75 and the second substrate 76 are fixedly arranged inside the housing 10, i.e., the first substrate 75 and the second substrate 76 fix the first collimating member 71, the second collimating member 72, the first reflecting member 73 and the fourth reflecting member 74 inside the accommodating space 101 of the housing 10. As preferred, in the preferred embodiment of the present application, the first reflecting member 73 and the second reflecting member 74 are arranged on the inner side walls of the first substrate 75 and the second substrate 76, and the first reflecting member 73, the first substrate 75, the second reflecting member 74 and the second substrate 76 are sequentially connected.

[0078] The first substrate 75 is provided with a light inlet, and the first collimating member 71 is arranged at the light inlet of the first substrate 75. The second substrate 76 is provided with a light outlet, and the second collimating member 72 is arranged at the light outlet of the second substrate 76.

[0079] It can be understood that the first reflecting surface 730 of the first reflecting member 73 and the second reflecting surface 740 of the second reflecting member 74 are arranged substantially parallel to each other between the first substrate 75 and the second substrate 76, and the first collimating member 71 and the second collimating member 72 are arranged on the first substrate 75 and the second substrate 76 respectively and correspondingly arranged with the first reflecting surface 730 and the second reflecting surface 740, so that the incident light entering the first collimating member 71 is collimated, reflected by the first reflecting surface 730 to the second reflecting surface 740, and then reflected by the second reflecting surface 740 into the second collimating member 72, and further collimated by the second collimating member 72, thereby improving the collimation effect of the incident light, and further enabling the subsequent dispersion element 20 to better perform light dispersion.

[0080] The dispersion element 20 can be implemented as a diffraction grating, a blazed grating, etc., which mainly splits the incident light.

[0081] The detector 30 can be implemented as a CCD chip, a CMOS chip or other detectors, and can receive incident light signals.

[0082] like Figure 5 As shown, in this preferred embodiment of the present application, the spectral device further includes at least one optical element 50, wherein the optical element 50 is arranged at the front end of the light incident direction of the incident slit 40, that is, the incident light passes through the optical element 50 and then passes through the incident slit 40 to reach the dispersion element 20, wherein the optical element 50 can be implemented as a lens, a light homogenizer, a microlens array, etc.

[0083] The optical element 50 can be implemented as a lens, microlens array, or the like, which can increase the recognition range and adjust the incident light, such as by focusing it. Preferably, the optical element 50 is implemented as a light homogenizer, such as a light diffuser. The light diffuser not only expands the recognition range but also, to a certain extent, converts the incident light into a light spot with uniform energy distribution. All light spots are superimposed to form a uniform light spot, thereby providing uniform incident light to the system. This avoids the phenomenon of high light intensity at the center of the dispersion element and weakened light intensity at the edges, thereby improving the diffraction efficiency of the dispersion element.

[0084] In this preferred embodiment of the present application, the spectroscopic device further includes a processing unit 60, which is electrically connected to the detector 30. The processing unit 60 can be arranged inside the shell 10 of the spectroscopic device, or can be electrically connected to the outside of the shell 10 of the spectroscopic device.

[0085] It should be noted that in this preferred embodiment of the present invention, the line connecting the center of the entrance slit 40 and the center of the dispersive element 20 and the line connecting the center of the detector 30 and the center of the dispersive element 20 form an angle of 30-120°. This means that by folding the optical path, the overall size of the spectroscopic device can be controlled. Preferably, the angle between the two is 90°.

[0086] In another optional embodiment of the present application, the detector 30 can also be implemented as an imaging module, wherein the imaging module includes a detector and an optical lens, and the optical lens is located on the light-sensitive path of the detector. In individual embodiments of the present application, the spectral device may further include a filter, and the filter is located between the optical lens and the detector. In order to better receive incident light, the FOV of the imaging module needs to be 40-150°, preferably 45-100°. Further, the imaging module includes a circuit board, and the detector is electrically connected to the circuit board.

[0087] According to the second preferred embodiment of the present application Figure 6 According to the second preferred embodiment of the present application

[0088] In detail, the spectral device comprises a housing 10, a dispersive element 20 and a detector 30 arranged in the housing 10, and an entrance slit 40 formed in the housing 10, wherein the housing 10 has a receiving space 101, and the dispersive element 20 and the detector 30 are arranged in the receiving space 101. Different from the first preferred embodiment, the spectral device further comprises at least one optical path adjusting assembly 80, wherein the optical path adjusting assembly 80 is arranged behind the light exit side of the entrance slit 40, i.e. the incident light incident through the entrance slit 40 is adjusted by the optical path adjusting assembly 80 and then irradiates the dispersive element 20, wherein the dispersive element 20 disperses the spectral components to different directions, and finally a focusing imaging system focuses the dispersed light on the detector 30 array to obtain the spectral distribution.

[0089] In this preferred embodiment of the present application, the optical path adjusting assembly 80 is located between the entrance slit 40 and the dispersive element 20, wherein the optical path adjusting assembly 80 is used to adjust the light rays emitted from the entrance slit 40, increase the effective optical path, and reduce the size of the spectral device, thereby realizing the miniaturization of the overall structure.

[0090] The optical path adjusting assembly comprises a first reflecting unit 81 and a second reflecting unit 82, wherein the first reflecting unit 81 is opposite to the second reflecting unit 82, the first reflecting unit 81 reflects the incident light to the second reflecting unit 82, and forms a reflecting light path between the first reflecting unit 81 and the second reflecting unit 82. The second reflecting unit 82 reflects the incident light to the dispersive element 20, and forms a second reflecting light path between the second reflecting unit 82 and the dispersive element 20.

[0091] In short, in this preferred embodiment of the present application, the optical path adjusting assembly 80 only needs to turn the incident light by the first reflecting unit 81 and the second reflecting unit 82 to finally reach the dispersive element 20 compared with the collimating assembly 70 of the second preferred embodiment, i.e. through the design of the first reflecting unit 81 and the second reflecting unit 82, the optical path from the entrance slit to the dispersive element can be lengthened without increasing the physical size, i.e. which is conducive to reducing the size of the entire spectral device.

[0092] That is, the incident light passes through the first reflecting unit 81 and the second reflecting unit 82 so that the effective optical path distance is unchanged, and the size of the entire collimating assembly is reduced. As in the second preferred embodiment described above, the first reflecting unit 81 has a first reflecting surface, and the second reflecting unit 82 has a second reflecting surface, wherein the first reflecting surface of the first reflecting unit 81 and the second reflecting surface of the second reflecting unit 82 are directly opposite to each other.

[0093] More preferably, the plane in which the first reflecting surface of the first reflecting unit 81 is located and the plane in which the second reflecting surface of the second reflecting unit 82 is located are parallel to each other, so that the direction of the incident light entering the optical path adjusting assembly 80 and the direction of the incident light exiting the optical path adjusting assembly 80 can be ensured unchanged.

[0094] It can be understood that the optical path adjusting assembly 80 further comprises a lens unit, wherein the lens unit can be arranged between the first reflecting unit 81 and the second reflecting unit 82, and the light reflected by the first reflecting unit 81 enters the second reflecting unit 82 through the lens unit. It can be understood that the lens unit can be, but is not limited to, a homogenizing mirror or other types of lenses.

[0095] As in the second preferred embodiment described above, the optical path adjusting assembly 80 further comprises a substrate (i.e., a first substrate and a second substrate) for fixing the first reflecting unit 81 and the second reflecting unit 82. The first substrate and the second substrate are fixedly arranged inside the housing 10, i.e., the first substrate and the second substrate fix the first reflecting unit 81 and the second reflecting unit 82 in the accommodation space 101 of the housing 10, wherein the specific structure of the substrate is not described here.

[0096] It should be understood by those skilled in the art that the above description and the embodiments shown in the drawings are only examples and do not limit the present application. The purpose of the present application has been completely and effectively achieved. The function and structure principle of the present application has been demonstrated and explained in the embodiments, and the implementation of the present application can be any modification or change without departing from the principle.

Claims

1. A spectroscopy device, characterized in that include: A housing having a housing space and an incident slit, through which incident light enters the housing space, wherein the incident slit performs both a diffraction effect and a geometric effect on the incident light; A dispersive element and a detector, wherein the dispersive element is opposite to the incident slit, the dispersive element splits the incident light, and the detector receives the incident light signal, wherein the dispersive element and the detector are arranged in the accommodating space of the shell.

2. The spectral device according to claim 1, characterized in that The spectral device further comprises at least one optical element, wherein the at least one optical element is located at the front end of the light incident direction of the incident slit, and the incident light passes through the optical element and then through the incident slit to reach the dispersion element.

3. The spectral device according to claim 2, characterized in that The optical element is selected from a combination of elements consisting of a lens, a light homogenizer, and a microlens array.

4. The spectral device according to claim 2, characterized in that The housing is further provided with a mounting cavity, wherein the mounting cavity is communicated with the incident slit, and the optical element is fixed in the mounting cavity of the housing.

5. The spectral device according to claim 1, characterized in that The depth of the incident slit is 1.5 to 4 mm.

6. The spectral device according to claim 1, characterized in that The depth of the incident slit is 2 to 3 mm.

7. The spectral device according to claim 1, characterized in that The width of the incident slit is 0.1-0.5 mm.

8. The spectral device according to claim 1, characterized in that The line connecting the center of the incident slit and the center of the dispersion element and the line connecting the center of the detector and the center of the dispersion element form an angle of 30°-120°.

9. The spectral device according to claim 4, characterized in that The spectral device further comprises a processing unit, wherein the processing unit is electrically connected to the detector.

10. The spectral device according to any one of claims 1 to 9, characterized in that: The spectral device further comprises at least one collimating component, wherein the collimating component is arranged behind the light exit square of the incident slit, that is, the incident light incident through the incident slit is collimated by the collimating component and then irradiated onto the dispersion element.

11. The spectral device according to claim 10, characterized in that The collimating assembly includes a first collimating member, a second collimating member, and a first reflecting member and a second reflecting member arranged between the first collimating member and the second collimating member, wherein the first reflecting member is located at the rear end of the light emitting direction of the first collimating member, the second reflecting member is located at the front end of the light incident direction of the second collimating member, and the first reflecting member and the second reflecting member are opposite to each other in a positive direction, and the first collimating member is located behind the incident slit, and the light emitted from the incident slit enters the first collimating member, is collimated by the first collimating member and reaches the first reflecting member, and forms a first collimated light path between the first collimating member and the first reflecting member.

12. The spectral device according to any one of claims 1 to 9, characterized in that: The spectral device further includes at least one optical path adjustment component, wherein the optical path adjustment component is arranged behind the light exit square of the incident slit, and the optical path adjustment component includes a first reflection unit and a second reflection unit, wherein the first reflection unit is opposite to the second reflection unit, the first reflection unit reflects the incident light to the second reflection unit, and forms a reflection light path between the first reflection unit and the second reflection unit, and the second reflection unit reflects the incident light to the dispersion element, and forms a second reflection light path between the second reflection unit and the dispersion element.

13. The spectral device according to claim 11, characterized in that The first reflecting member has a first reflecting surface, and the second reflecting member has a second reflecting surface. The first reflecting surface of the first reflecting member is directly opposite to the second reflecting surface of the second reflecting member, and the plane where the first reflecting surface is located and the plane where the second reflecting surface of the second reflecting member is located are parallel to each other.

14. The spectral device according to claim 13, characterized in that The collimating assembly further includes a first substrate and a second substrate, wherein the first collimating element is disposed on the first substrate, and the second collimating element is disposed on the second substrate.

Images