A stage and a spectral detection device

Abstract

This utility model discloses a stage and a spectral detection device, relating to the field of spectral detection technology. The stage includes a curved platform and multiple bases. The bases are disposed at the bottom of the curved platform and spaced circumferentially around it. The top surface of the curved platform is curved, and a light-transmitting window is formed at the top. A cavity is formed inside the curved platform, communicating with the light-transmitting window. At least one photodetector is installed within the cavity, with its photosensitive surface facing the light-transmitting window, allowing light to pass through the window and reach the photosensitive surface. The stage and spectral detection device provided by this utility model have the advantages of stably conforming to curved objects and achieving full-surface spectral detection of curved objects.

Description

Technical Field

[0001] This utility model relates to the field of spectral detection technology, and more specifically, to a stage and a spectral detection device. Background Technology

[0002] Spectroscopic detection equipment analyzes the composition, structure, or state of an object by measuring the characteristic spectral signals generated by the interaction between the object and light (such as absorption, reflection, scattering, etc.).

[0003] When inspecting objects with thinness and complex surface morphology (such as irregular curved surfaces), such as leather, dried food, textiles, and paper products, traditional planar inspection methods aim to reduce the loss of light signals during propagation by directly contacting the planar probe of the spectral detection equipment with the surface of the curved object placed on the planar inspection stage to obtain the characteristic spectral signals of the object.

[0004] This planar detection method has the problem that the spectral detection equipment cannot make complete contact with the surface of the curved object. Utility Model Content

[0005] This invention aims to address one of the technical problems in related technologies to a certain extent. To this end, this invention provides a stage and a spectral detection device, which have the advantages of being able to stably conform to curved objects and achieve full-surface spectral detection of curved objects.

[0006] To achieve the above objectives, the present invention adopts the following technical solution in the first aspect:

[0007] A stage, comprising a curved platform and a plurality of bases, wherein the plurality of bases are disposed at the bottom end of the curved platform and spaced circumferentially around the curved platform; the top surface of the curved platform is curved and a light-transmitting window is formed at the top of the curved platform; a cavity is formed inside the curved platform and communicates with the light-transmitting window; at least one photodetector is installed in the cavity, and the photosensitive surface of the photodetector faces the light-transmitting window so that light can pass through the light-transmitting window and reach the photosensitive surface of the photodetector.

[0008] Optionally, the stage further includes a detector substrate and a plurality of fasteners. The detector substrate is fixed in the cavity and faces the light-transmitting window. The photodetector is disposed on the surface of the detector substrate facing the light-transmitting window. The plurality of fasteners fix the detector substrate in the cavity.

[0009] Optionally, a plurality of the fixing members are arranged around the light-transmitting window, one end of the fixing member is fixed to the inner wall of the cavity, and the other end of the fixing member is suspended in the cavity; the surface of the fixing member facing the light-transmitting window has a slot, and the edge of the detector substrate is located in the slot of the surface of the plurality of fixing members.

[0010] Optionally, the platform is further provided with a plurality of clearance notches and a plurality of mounting holes. The plurality of clearance notches correspond one-to-one with the plurality of bases. The clearance notches are located at the connection between the bottom end of the curved platform and the corresponding base. The plurality of mounting holes correspond one-to-one with the plurality of bases. The mounting holes are located on the corresponding bases and penetrate the corresponding bases along the thickness direction.

[0011] Optionally, the stage further includes a light-transmitting protective layer, which is disposed at the light-transmitting window.

[0012] In addition, the present invention also provides a spectral detection device in a second aspect, the spectral detection device including a spectral detection probe and a stage, the stage being the stage provided in the first aspect, the spectral detection probe being used to emit detection light toward the light-transmitting window so that the light can pass through the light-transmitting window and reach the photosensitive surface of the photodetector.

[0013] Optionally, the spectral detection device further includes a probe holder, which includes a fixture mounting base, a probe clamping component, and a plurality of parallel guide rods. The fixture mounting base is used to fix the probe holder to the mounting base; the probe clamping component is used to fix the spectral detection probe; one end of the plurality of guide rods is hinged to the fixture mounting base, and the other end of the plurality of guide rods is hinged to the probe clamping component.

[0014] Optionally, a light-transmitting port is formed on the housing of the spectral detection probe, and a light-transmitting protective plate is provided on the light-transmitting port.

[0015] Optionally, the spectral detection probe further includes an optical transmission medium, a collimating device, and a collimating clamp, all of which are disposed within the housing. The collimating device is disposed at the optical output end of the optical transmission medium for collimating the light beam; the collimating clamp is used to fix the collimating device; and the collimating end of the collimating device is disposed between the collimating clamp and the light-transmitting protective plate, so that the collimated light beam is output towards the light-transmitting protective plate.

[0016] Optionally, the spectral detection device further includes a light source, a spectral modulator, and a circuit module. The spectral modulator is used to change the energy distribution of the light emitted by the light source in the spectrum. The output terminals of the circuit module are all connected to the light source and the spectral modulator to drive the light source and the spectral modulator. The spectral modulator is connected to the spectral detection probe. The input terminal of the circuit module is electrically connected to the photodetector of the stage to receive the electrical signal output by the photodetector and to calculate and output the spectral information of the object to be detected.

[0017] The stage described in this invention features a curved platform that matches the surface of the object to be tested and has light-transmitting capabilities, along with a photodetector integrated within the stage. This structure enables both transmissive and reflective measurements of the curved surface. Because the curved platform can stably conform to the object, it ensures that the surface of the object is fully exposed to the measurement environment. Simultaneously, using the clamps in the spectral detection device, a point-to-point contact method allows the spectral detection probe to contact any part of the curved surface, thereby achieving full-surface spectral detection of the object.

[0018] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the stage provided in an embodiment of the present utility model.

[0021] Figure 2 A schematic diagram of the internal structure of the stage provided in an embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram showing the fixing of the photoelectric detector inside the stage provided in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the stage being fixed on the testing platform according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the spectral detection device provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of a spectral detection device provided in another embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the probe clamp provided in an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the internal structure of the reflectance spectral detection probe provided in an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the internal structure of the transmission spectral detection probe provided in an embodiment of the present invention.

[0029] Figure 10 This is a schematic diagram of the structure of two spectral detection devices based on reflection and transmission, provided for another embodiment of this utility model.

[0030] Figure 11 A schematic diagram of the circuit module provided in the embodiment of this utility model.

[0031] Figure 12 This is a schematic diagram of the structure of the spectral modulator in the embodiment provided by this utility model.

[0032] Figure 13 This is a schematic diagram of the structure of the spectral modulator in another embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures

[0034] Among them, 100 is the stage; 110 is the base; 120 is the curved stage; 121 is the light-transmitting window; 130 is the photodetector; 140 is the detector substrate; 150 is the fastener; 1101 is the mounting hole; 1201 is the clearance notch; 1211 is the light-transmitting protective layer; 200 is the spectral detection device; 210 is the object to be detected; 220 is the spectral detection probe; 230 is the probe clamp; 231 is the guide rod; and 232 is the clamp mounting base. ; 233, Probe clamp; 221, Light-transmitting protective plate; 222, Housing; 223, Light transmission medium; 224, Collimation device; 225, Collimation clamp; 226, Collimation end; 240, Light source; 250, Spectral modulator; 251, Active tunable spectral unit; 2511, Phase modulator; 260, Circuit module; 261, Drive module; 262, Signal processing module; 300, Detection platform; 301, Positioning hole. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0036] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0037] When acquiring characteristic spectral signals of curved objects using a planar spectral detection probe, the curved object is typically placed on a planar detection stage, and the spectral measurement is performed by contacting the surface of the curved object through the planar contact surface of the spectral detection probe. However, due to the inevitable wrinkles and bends of the curved object placed on the planar detection stage, as well as the mismatch between the surface of the curved object and the shape of the planar probe, the spectral detection probe and the surface of the curved object cannot fit tightly together, resulting in contact dead zones and significant errors in the detection results.

[0038] In view of this, as a first aspect of the present invention, a stage is provided. Figure 1-2 These are schematic diagrams of the external and internal structures of the stage 100 provided by this utility model. The stage 100 includes a curved platform 120 and multiple bases 110. The bases 110 are disposed at the bottom of the curved platform 120 and spaced apart circumferentially around the platform. The top surface of the curved platform 120 is curved, and a light-transmitting window 121 is formed at the top of the platform. A cavity is formed inside the curved platform 120, communicating with the light-transmitting window 121. At least one photodetector 130 is installed inside the cavity, with the photosensitive surface of the photodetector 130 facing the light-transmitting window 121, so that light can pass through the light-transmitting window 121 to reach the photosensitive surface of the photodetector 130.

[0039] The stage 100 provided by this invention includes a curved stage 120 that matches the surface of the curved object 210 and has light transmission capabilities, as well as a photodetector 130 integrated inside the stage 100. This structure enables transmission or reflection measurements of the surface of the curved object 210. Because the curved stage 120 can stably fit the curved object 210, it ensures that the surface of the object is fully exposed to the measurement environment. The spectral detection probe 220 can make point-to-point contact with any part of the surface of the object 210, thereby achieving full-surface spectral detection of the object. Simultaneously, the stage 100 avoids additional operations such as stretching or pressing the curved object 210, enabling non-destructive testing when measuring thin curved objects 210.

[0040] It should be noted that the curved platform 120 of the stage 100 can be customized according to the shape of the curved object 210 to be detected. Figure 1-2 The curved platform 120 of the middle stage 100 is hemispherical and can fit a hemispherical curved object.

[0041] Figure 1-2 The curved stage 120 has a light-transmitting window 121 at its top. As an optional implementation, an object 210 to be tested is placed on the light-transmitting window 121. The light signal transmitted by the object 210 is transmitted through the light-transmitting window 121 to the interior of the cavity. A photodetector 130 located inside the cavity can receive the light signal passing through the light-transmitting window 121. It should be noted that the size of the light-transmitting window 121 and the effective area of ​​the photodetector 130's light-receiving end need to be dynamically matched. Specifically, when the light-transmitting window 121 is large, a larger area photodetector 130 is used; when the light-transmitting window 121 is small, a smaller area photodetector 130 is used. The essence of this design is to maximize the light signal reception efficiency without wasting the resources of the photodetector 130, thereby ensuring the accuracy and efficiency of the measurement.

[0042] The following is in conjunction with the appendix Figure 3The method of fixing the photodetector 130 inside the cavity is described in detail. The stage 100 also includes a detector substrate 140 and a plurality of fixing members 150. The detector substrate 140 is fixed inside the cavity and faces the light-transmitting window 121. The photodetector 130 is disposed on the surface of the detector substrate 140 facing the light-transmitting window 121. The plurality of fixing members 150 fix the detector substrate 140 inside the cavity. The plurality of fixing members 150 are arranged around the light-transmitting window 121. One end of the fixing member 150 is fixed to the inner wall of the cavity, and the other end of the fixing member 150 is suspended inside the cavity. The surface of the fixing member 150 facing the light-transmitting window 121 has a groove, and the edge of the detector substrate 140 is located in the groove on the surface of the plurality of fixing members 150.

[0043] The photodetector 130 can be flexibly adjusted to receive the light signal from the object 210 by changing the fixing height of the fixing member 150 inside the cavity. Typically, to reduce light signal loss during transmission, the fixing member 150 can be fixed to the inner wall of the cavity, ensuring the photosensitive surface of the photodetector 130 is in contact with the light-transmitting window 121. The fixing methods for the fixing member 150 inside the cavity include, but are not limited to, snap-fit ​​connection, screw fixing, riveting fixing, or magnetic fixing.

[0044] In actual measurement, the stage 100 is first fixed on the detection platform 300, and then the object to be measured 210 is stably placed on the light-transmitting window 121 of the stage 100. As an optional implementation method, such as... Figure 4 As shown, the testing platform 300 is provided with corresponding positioning holes 301, and the stage 100 is also provided with multiple clearance notches 1201 and multiple mounting holes 1101. The clearance notches 1201 correspond one-to-one with multiple bases 110, and are located at the connection between the bottom of the curved stage 120 and the corresponding base 110. The mounting holes 1101 correspond one-to-one with the bases 110, and are located on the corresponding bases 110, penetrating the bases 110 along their thickness direction. The mounting holes 1101 of the stage 100 are coaxially aligned with the positioning holes 301 on the testing platform 300. Bolts passing through the mounting holes 1101 and positioning holes 301, and nuts fixed to the ends of the bolts, fix the bases 110 to the testing platform 300. The openings of the clearance notches 1201 face the corresponding mounting holes 1101, providing clearance space for the fixing operation and facilitating the entire assembly and operation process.

[0045] It should be further noted that the stage 100 also includes a light-transmitting protective layer 1211, which is disposed at the light-transmitting window 121.

[0046] As a second aspect of this utility model, a spectral detection device 200 is provided, such as... Figure 5 As shown, the spectral detection device 200 includes a spectral detection probe 220 and a stage 100, which is the same stage 100 provided in the first aspect. The spectral detection probe 220 emits detection light toward the light-transmitting window 121, so that the light can pass through the light-transmitting window and reach the photosensitive surface of the photodetector. To better move the spectral detection probe 220 and stably contact the surface of the object 210 to be detected, as an optional implementation, such as... Figure 6 As shown, the spectral detection device 200 also includes a probe clamp 230, which includes a clamp mounting base 232, a probe holding member 233, and a plurality of parallel guide rods 231. The clamp mounting base 232 is used to fix the probe clamp 230 to the mounting base; the probe holding member 233 is used to fix the spectral detection probe 220; one end of the plurality of guide rods 231 is hinged to the clamp mounting base 232, and the other end of the plurality of guide rods 231 is hinged to the probe holding member 233. A schematic diagram of the clamp structure is shown in [reference needed]. Figure 7 .

[0047] The spectral detection device 200 provided by this utility model includes two measurement methods: reflection and transmission. A schematic diagram of the spectral detection probe 220 in the reflection measurement method is shown below. Figure 8 As shown in the figure, the structural schematic diagram of the spectral detection probe 220 in the transmission measurement method is as follows: Figure 9 As shown.

[0048] Figure 8 and Figure 9 Both types of spectral detection probes 220 shown include a housing 222, and a light-transmitting protective plate 221 covering the light-transmitting opening of the probe is formed on the housing 222. Since the light-transmitting protective plate 221 of the spectral detection probe 220 directly contacts the object to be detected 210, which is placed on the stage 100, the light-transmitting protective plate 221 of the spectral detection probe 220 and the light-transmitting window 121 of the stage 100 remain on opposite sides of the object to be detected 210, regardless of how the spectral detection probe 220 is moved during measurement.

[0049] Regardless of the measurement method, the spectral detection probe 220 internally includes an optical transmission medium 223 and a collimating device 224. The optical transmission medium 223 (such as a single-mode optical fiber) is used to emit detection light, and the optical output end of the single-mode optical fiber is connected to the collimating device 224 (such as a fiber optic collimator). The fiber optic collimator is used to direct the light emitted from the single-mode optical fiber toward the light-transmitting protective plate 221 and through the light-transmitting protective plate 221 to illuminate the object 210 to be detected. It should be noted that, in addition to the fiber optic collimator mentioned above, the device inside the spectral detection probe 220 used for beam collimation or changing the direction of light signal propagation can also be a collimating lens, a self-focusing lens with a graded refractive index, or other lenses capable of controlling the beam. The light-transmitting protective plate 221, which provides light transmission, can be adjusted according to specific testing needs. For example, a glass window or any light-transmitting device that can achieve a light transmittance of more than 90% can be used as a replacement. Similarly, other optimization treatments such as coating can be applied to the light-transmitting device. There are no specific limitations on the shape of the light-transmitting device, as long as it can achieve the incident and reflection of light signals and does not increase the loss of light signals during transmission. For example, the shape of the light-transmitting device can be circular, square, or other shapes.

[0050] The main difference between transmission and reflection measurement methods in the spectral detection probe 220 is that the reflection measurement spectral detection probe 220 internally includes a detector substrate 140 and multiple photodetectors 130. The multiple photodetectors 130 are disposed on the detector substrate 140 and are used to receive the light signal reflected by the object 210 that has passed through the light-transmitting protective plate 221, such as... Figure 8 As shown. The spectral detection probe 220 for transmission measurement does not require the internal placement of the detector substrate 140 and photodetector 130. Only a collimating clamp 225 needs to be added inside the spectral detection probe 220 to fix the collimating device 224. The collimating end 226 of the collimating device 224 is positioned between the collimating clamp 225 and the light-transmitting protective plate 221, so that the collimated beam can be output perpendicular to the light-transmitting protective plate 221. Figure 9 As shown above. Figure 5 This is a schematic diagram of a transmission-based measurement method.

[0051] It should be noted that, Figure 8 and Figure 9 The housing 222 of the spectral detection probe 220 shown is cylindrical. In practical applications, the shape of the housing 222 of the spectral detection probe 220 is not specifically limited and can be cylindrical, square, or other shapes. Figure 8 and Figure 9 The mid-spectral detection probe 220 uses a smaller light-transmitting protective plate 221 and a narrow and long housing 222, which can significantly reduce the contact area with the object to be detected 210 and effectively prevent damage to the object to be detected 210 during the detection process.

[0052] As another embodiment of the spectral detection device 200, the spectral detection device 200 further includes a light source 240, a spectral modulator 250, and a circuit module 260. The spectral modulator 250 is used to change the energy distribution of the light emitted by the light source 240 in the spectrum. The output terminals of the circuit module 260 are connected to the light source 240 and the spectral modulator 250 to drive the light source 240 and the spectral modulator 250. The spectral modulator 250 is connected to the spectral detection probe 220. In the reflection measurement mode, the input terminal of the circuit module 260 is connected to the electrical connection line of the spectral detection probe 220 to receive the electrical signal output by the spectral detection probe 220 and to calculate and output the spectral information of the object 210 to be detected. In the transmission measurement mode, the input terminal of the circuit module 260 is electrically connected to the photodetector 130 of the stage 100 to receive the electrical signal output by the photodetector 130 of the stage 100 and to calculate and output the spectral information of the object 210 to be detected.

[0053] Figure 10The diagrams of two types of spectral detection devices 200, namely reflection and transmission, are described, and the propagation paths of optical and electrical signals in the two types of spectral detection devices 200 are marked in detail. For reflective measurements, circuit module 260 sends electrical signals to light source 240 and spectral modulator 250, driving light source 240 to emit light and driving spectral modulator 250 to operate. The light signal emitted by light source 240 is modulated by spectral modulator 250, and the modulated light signal is transmitted to the inside of spectral detection probe 220 through optical transmission medium 223 (such as single-mode optical fiber). After collimation by collimation device 224 (such as fiber collimator) inside spectral detection probe 220, the light signal passes through the light-transmitting protective plate 221 of spectral detection probe 220 and illuminates the object to be detected 210. The light signal reflected by the object to be detected 210 passes through the light-transmitting protective plate 221 again and is received by multiple photodetectors 130 inside spectral detection probe 220, converting the light signal into an electrical signal. The electrical signal is output to circuit module 260 through signal lines inside spectral detection probe 220. Circuit module 260 processes the electrical signal and calculates the spectral information of object to be detected 210. For transmission-type measurements, circuit module 260 also sends an electrical signal to drive light source 240 to emit light and drive spectral modulator 250 to work. Spectral modulator 250 modulates the light emitted by light source 240. The modulated light signal is transmitted through optical transmission medium 223 (such as single-mode fiber) to the inside of spectral detection probe 220. After passing through the fiber collimator located at the optical output end of the single-mode fiber, the light signal passes through the light-transmitting protective plate 221 of spectral detection probe 220 at the optimal angle and illuminates the object to be detected 210. The light signal transmitted by the object to be detected 210 passes through the light-transmitting area of ​​stage 100 and is received by the light receiving end of photodetector 130, which is attached to the internal cavity of stage 100. The photodetector 130 inside stage 100 converts the light signal into an electrical signal and transmits the electrical signal to circuit module 260 via a signal line. Circuit module 260 processes the electrical signal and calculates the spectral information of object to be detected 210.

[0054] During the measurement process, the curved object to be tested 210 is first fixed on the stage 100. After the spectral detection probe 220 is stably clamped by the clamping assembly of the probe clamp 230, the probe clamp 230 is moved to achieve point-to-point contact between the spectral detection probe 220 and the surface of the object to be tested 210. During the full surface contact with the object to be tested 210, the four-bar structure of the probe clamp 230 and the spring work together to ensure that the spectral detection probe 220 can maintain constant pressure while moving slowly, thus improving the stability of the detection process.

[0055] It is necessary to describe in detail the above-mentioned reflective spectral detection device 200 and transmission spectral detection device 200. The light source 240 can be a superluminescent diode or other broadband light source. Since it has been clearly stated above that the shape of the spectral detection probe 220 is not limited to a certain special shape, the clamping component of the probe clamp 230 can be disassembled to replace or adapt to spectral detection probes 220 of different shapes.

[0056] It should also be noted that the circuit modulation module includes a driver module 261 and a signal processing module 262, such as Figure 11 As shown. The driving module 261 is used to drive the light source 240 and the spectral modulator 250; the signal processing module 262 is connected to the signal line of the spectral detection probe 220 or to the photodetector 130 located on the stage 100, and calculates the spectral information of the object to be detected 210 based on the received electrical signal.

[0057] A spectral modulator 250 is disposed between the light source 240 and the spectral detection probe 220 to change the energy distribution of the light emitted by the light source 240 across the spectrum. As an optional implementation, such as... Figure 12 As shown, the spectral modulator 250 includes multiple active tunable spectral units 251, with the output of the previous active tunable spectral unit 251 connected to the input of the next active tunable spectral unit 251. The active tunable spectral unit 251 includes a beam splitting unit, where the beam splitting element can be various common waveguide beam splitters, such as directional couplers, multimode interferometers, etc.

[0058] Figure 13 The given spectral modulator 250 consists of four active tunable spectral units 251. The first active tunable spectral unit 251 is an asymmetric Mach-Zehnder interferometer, with a phase modulator 2511 on each of its interferometer arms. The phase modulator 2511 is used to tune the phase information of the optical signal. The second to fourth active tunable spectral units 251 are microring resonators, each with a different ring length and a phase modulator 2511. The optical signal is transmitted through an optical waveguide to two interferometer arms of the asymmetric Mach-Zehnder interferometer. By changing the parameters of the phase modulators 2511 on the interferometer arms, the phase difference / optical path difference of the optical signals on the two interferometer arms is changed, causing interference between the two optical signals on the interferometer arms at the optical waveguide, thus controlling the intensity of the optical signal. The optical signal processed by the Mach-Zehnder interferometer enters the microring structure, where the microring performs wavelength selection on the input optical signal, coupling a specific wavelength of optical signal to the microring. Through the synergistic effect of these two components, flexible tuning and control of various parameters of the optical signal (such as wavelength and intensity) can be achieved. In addition to the spectral modulator 250... Figure 13In addition to the given embodiments, the structure can also be a cascaded Mach-Zehnder interferometer or a cascaded microring.

[0059] The stage 100 provided by this utility model is designed with a curved stage 120 that matches the surface of the curved object 210 and has light transmission function, as well as a photodetector 130 integrated inside the stage 100. This structure can realize transmission or reflection measurement of the surface of the curved object 210. Since the curved stage 120 can stably fit the curved object 210, it ensures that the surface of the curved object 210 is fully exposed to the measurement environment. The spectral detection probe 220 can contact any part of the surface of the curved object 210 without dead angles, thereby realizing full-surface spectral detection of the curved object 210. At the same time, the stage 100 avoids additional operations such as stretching and pressing on the curved object 210, and can realize non-destructive detection when measuring the thin curved object 210.

[0060] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A stage, characterized in that, The stage (100) includes a curved stage (120) and a plurality of bases (110). The plurality of bases (110) are disposed at the bottom end of the curved stage (120) and are spaced apart around the circumference of the curved stage (120). The top surface of the curved stage (120) is curved. A light-transmitting window (121) is formed at the top of the curved stage (120). A cavity is formed inside the curved stage (120). The cavity communicates with the light-transmitting window (121). At least one photodetector (130) is installed in the cavity. The photosensitive surface of the photodetector (130) faces the light-transmitting window (121) so that light can pass through the light-transmitting window (121) and reach the photosensitive surface of the photodetector (130).

2. The stage according to claim 1, characterized in that, The stage (100) further includes a detector substrate (140) and a plurality of fasteners (150). The detector substrate (140) is fixed in the cavity and faces the light-transmitting window (121). The photodetector (130) is disposed on the surface of the detector substrate (140) facing the light-transmitting window (121). The plurality of fasteners (150) fix the detector substrate (140) in the cavity.

3. The stage according to claim 2, characterized in that, Multiple fasteners (150) are arranged around the light-transmitting window (121). One end of each fastener (150) is fixed to the inner wall of the cavity, and the other end of each fastener (150) is suspended in the cavity. The fastener (150) has a slot on its surface facing the light-transmitting window (121), and the edge of the detector substrate (140) is located in the slot on the surface of the multiple fasteners (150).

4. The stage according to any one of claims 1 to 3, characterized in that, The platform (100) also has a plurality of clearance notches (1201) and a plurality of mounting holes (1101). The plurality of clearance notches (1201) correspond one-to-one with the plurality of bases (110). The clearance notches (1201) are located at the connection between the bottom end of the curved platform (120) and the corresponding base (110). The plurality of mounting holes (1101) correspond one-to-one with the plurality of bases (110). The mounting holes (1101) are located on the corresponding bases (110) and penetrate the corresponding bases (110) along the thickness direction.

5. The stage according to any one of claims 1 to 3, characterized in that, The stage (100) also includes a light-transmitting protective layer (1211), which is disposed at the light-transmitting window (121).

6. A spectral detection device, the spectral detection device (200) comprising a spectral detection probe (220), characterized in that, The spectral detection device (200) further includes a stage (100), which is the stage according to any one of claims 1 to 5. The spectral detection probe (220) is used to emit detection light toward the light-transmitting window (121) so that the light can pass through the light-transmitting window (121) and reach the photosensitive surface of the photodetector (130).

7. The spectral detection device according to claim 6, characterized in that, The spectral detection device further includes a probe holder (230), which includes a holder mounting base (232), a probe holder (233), and a plurality of parallel guide rods (231). The holder mounting base (232) is used to fix the probe holder (230) to the mounting base; the probe holder (233) is used to fix the spectral detection probe (220); one end of the plurality of guide rods (231) is hinged to the holder mounting base (232), and the other end of the plurality of guide rods (231) is hinged to the probe holder (233).

8. The spectral detection device according to claim 7, characterized in that, The housing (222) of the spectral detection probe (220) has a light-transmitting port, and a light-transmitting protective plate (221) is provided on the light-transmitting port.

9. The spectral detection device according to claim 8, characterized in that, The spectral detection probe (220) further includes an optical transmission medium (223), a collimating device (224), and a collimating clamp (225). The optical transmission medium (223), the collimating device (224), and the collimating clamp (225) are all disposed within the housing (222). The collimating device (224) is disposed at the light output end of the optical transmission medium (223) for collimating the light beam. The collimating clamp (225) is used to fix the collimating device (224). The collimating end (226) of the collimating device (224) is disposed between the collimating clamp (225) and the light-transmitting protective plate (221) so that the collimated light beam is output toward the light-transmitting protective plate (221).

10. The spectral detection device according to claim 6, characterized in that, The spectral detection device (200) further includes a light source (240), a spectral modulator (250), and a circuit module (260). The spectral modulator (250) is used to change the energy distribution of the light emitted by the light source (240) in the spectrum. The output terminals of the circuit module (260) are connected to the light source (240) and the spectral modulator (250) to drive the light source (240) and the spectral modulator (250). The spectral modulator (250) is connected to the spectral detection probe (220). The input terminal of the circuit module (260) is electrically connected to the photodetector (130) of the stage (100) to receive the electrical signal output by the photodetector (130) and to calculate and output the spectral information of the object to be detected (210).

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