A spectrophotometer

Abstract

This application relates to the field of optical measurement instrument technology, and more particularly to a spectrophotometer, comprising a base, a two-dimensional moving platform, a lighting assembly, and a line-scan hyperspectral camera. The two-dimensional moving platform is fixedly mounted on the surface of the base and is used to drive a sample lifting stage in two-dimensional movement. The lighting assembly is disposed above the sample lifting stage and includes a diffuser and a light source assembly. A light-emitting aperture is formed on the surface of the diffuser. The line-scan hyperspectral camera is fixedly mounted on the diffuser and includes a slit positioned directly opposite the light-emitting aperture, with the extension direction of the slit being the same as the extension direction of the light-emitting aperture. By using the two-dimensional moving platform to drive the sample in two-dimensional movement relative to the line-scan hyperspectral camera and the light-emitting aperture, the light emitted from the light-emitting aperture traverses the sample surface while the line-scan hyperspectral camera scans and acquires the color information of the sample surface, generating a full-frame color image and performing image color measurement, which has broad application prospects.

Description

Technical Field

[0001] This application relates to the field of optical measurement instrument technology, and in particular to a spectrophotometer. Background Technology

[0002] A spectrophotometer is a high-precision color measurement instrument based on the principle of spectral analysis. It uses a grating or prism to decompose incident light into a continuous spectrum and detects the intensity of light at each wavelength reflected or transmitted from an object's surface, thereby obtaining accurate color data. Its core advantages lie in its high wavelength resolution and objective quantification capabilities, allowing it to replace subjective human judgment. Therefore, it is widely used in industrial quality inspection, printing color management, and display calibration to ensure color consistency.

[0003] Traditional spectrophotometers use an integrating sphere light source to illuminate the sample, and their detectors are typically single-point spectrometers used to measure the spectral characteristics of a single point. However, they cannot generate a full-frame color image of a large sample at once and perform image color measurements, nor can they further acquire color information from different locations on the sample. Therefore, in scenarios that require precise analysis of color differences at different locations on the sample, such as identifying fabric colors to inspect the quality of fabric printing, traditional spectrophotometers have significant limitations. Utility Model Content

[0004] In view of this, this application provides a spectrophotometer that can solve the problem that traditional spectrophotometers cannot generate a full-frame color image of a large sample at once and perform image color measurement, nor can they further obtain color information at different locations of the sample, thus limiting their application scenarios.

[0005] Some embodiments of this application provide a spectrophotometer, including a base, a two-dimensional moving platform, a light-emitting assembly, and a line-scan hyperspectral camera.

[0006] Specifically, the two-dimensional mobile platform is fixedly installed on the surface of the base.

[0007] Specifically, the sample lifting platform is set on a two-dimensional moving platform, which is used to drive the sample lifting platform to move in two dimensions.

[0008] Specifically, the lighting assembly includes a diffuser and a light source assembly. The diffuser has a light-emitting hole on its surface, which is a linear opening and is positioned directly opposite the sample lifting stage. The light source assembly is fixedly mounted on the diffuser and is used to project light into the interior of the diffuser.

[0009] Specifically, the line-scan hyperspectral camera is fixedly mounted on the diffuse reflector. The line-scan hyperspectral camera includes a slit, which is positioned directly opposite the light-emitting aperture. The extension direction of the slit is the same as the extension direction of the light-emitting aperture. The extension direction of the slit is perpendicular to one of the two-dimensional movement directions of the sample and parallel to the other two-dimensional movement direction of the sample.

[0010] In one embodiment of this application, the two-dimensional mobile platform includes a first electric guide rail and a second electric guide rail.

[0011] Specifically, the first electric guide rail is disposed on the surface of the base along a first direction.

[0012] Specifically, the second electric guide rail is mounted on the first electric guide rail and extends along the second direction, and the sample lifting platform is mounted on the second electric guide rail, with the first direction and the second direction being perpendicular.

[0013] In one embodiment of this application, the two-dimensional mobile platform further includes an auxiliary support component, which includes a guide rail and a moving component.

[0014] Specifically, the guide rail is set on the base and extends along the first direction.

[0015] Specifically, the movable component is movably mounted on the guide rail, the moving trajectory of the movable component extends along the first direction, and the movable component is fixedly connected to the second electric guide rail.

[0016] In one embodiment of this application, the moving component is a slider, which is slidably mounted on a guide rail and fixedly connected to a second electric guide rail.

[0017] In one embodiment of this application, a guide groove is provided on the surface of the guide rail, the guide groove extends along a first direction, and the moving component includes a moving block and a roller.

[0018] Specifically, the movable block is slidably disposed against the inner wall surface of the guide groove, and the movable block is fixedly connected to the second electric guide rail.

[0019] Specifically, the roller is mounted on the surface of the moving block and is rolled against the inner wall surface of the guide groove.

[0020] In one embodiment of this application, the sample lifting platform includes a lifter and a tray.

[0021] Specifically, the lifting device is mounted on a second electric guide rail, which is used to drive the lifting device to move. The lifting device includes a lifting end.

[0022] Specifically, the tray is fixedly connected to the lifting end, and the tray is used to support the sample.

[0023] In one embodiment of this application, the spectrophotometer further includes a gantry, one end of which is disposed on the surface of the base, and the other end is connected to a diffuse reflector and a line-scan hyperspectral camera.

[0024] In one embodiment of this application, the light source assembly includes a light source and a baffle.

[0025] Specifically, the light source is fixedly mounted on the diffuser, and the light source is used to project light into the interior of the diffuser.

[0026] Specifically, the baffle is fixedly installed on the inner wall surface of the diffuser and positioned close to the light source. The baffle is used to block the light generated by the light source from shining directly into the light outlet.

[0027] In one embodiment of this application, the diffuse reflector is an integrating sphere.

[0028] In one embodiment of this application, the diffuse reflector is a cylindrical integrating cavity, the inner wall surface of which is coated with a highly reflective material, and the light-emitting aperture is opened on the arc-shaped sidewall of the cylindrical integrating cavity and extends along the axial direction of the cylindrical integrating cavity.

[0029] The above-mentioned technical solution of this application has the following beneficial effects:

[0030] By using a two-dimensional moving platform, the sample can be moved both perpendicularly to the slit of the line-scan hyperspectral camera, allowing the camera to scan the sample surface and acquire color information, and parallel to the slit, thus adjusting the area that the camera can scan. This enables the line-scan hyperspectral camera to comprehensively acquire color information from the sample surface. Combined with a lighting component to provide uniform illumination to the scanned portion of the sample, this achieves high-precision color information acquisition for large sample areas, generating a full-frame color image and performing color measurements. This facilitates further acquisition of color information from different locations on the sample, overcoming the limitations of existing spectrophotometers in terms of scannable area. It offers faster measurement speeds and larger measurement areas, and can be used to accurately analyze color differences at different locations on the sample, demonstrating broad application prospects. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a spectrophotometer according to an embodiment of this application;

[0032] Figure 2 for Figure 1 The diagram shows the structure of the spectrometer from an upward viewing angle.

[0033] Figure 3 for Figure 1 The diagram shows a front view of the spectrophotometer.

[0034] Figure 4 For along Figure 3 The diagram shows a cross-sectional view of a spectrophotometer cut along the AA line.

[0035] Figure 5 This is a schematic diagram of the structure of a two-dimensional mobile platform according to an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the structure of an auxiliary support component according to an embodiment of this application;

[0037] Figure 7 for Figure 6 The structural cross-sectional view of the auxiliary support component shown;

[0038] Figure 8 This is another structural schematic diagram of the spectrophotometer according to an embodiment of this application;

[0039] Figure 9 for Figure 8 The front view of the spectrophotometer shown;

[0040] Figure 10 For along Figure 9 The image shows a cross-sectional view of a spectrophotometer cut along the BB line.

[0041] Figure label:

[0042] 1. Base; 2. Two-dimensional moving platform; 201. First electric guide rail; 202. Second electric guide rail; 203. Auxiliary support assembly; 2031. Guide rail; 2032. Moving assembly; 3. Sample lifting platform; 301. Lifter; 302. Pallet; 4. Gantry frame; 5. Lighting assembly; 501. Diffuser; 502. Light source assembly; 5021. Light source; 5022. Baffle; 503. Light outlet; 6. Line scan hyperspectral camera; 7. Guide groove; 8. Moving block; 9. Roller; 10. Cylindrical integrating cavity. Detailed Implementation

[0043] 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, 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.

[0044] The following is a brief explanation of the terms used in this application.

[0045] Two-dimensional moving platform: Also known as an XY moving platform, the two-dimensional moving platform can perform precise positioning and movement along the X and Y axes in the horizontal plane, and is widely used in high-precision machining, inspection, assembly and other scenarios.

[0046] Line-scan hyperspectral camera: This is a pushbroom imaging spectrometer. Its working principle is as follows: The camera instantaneously acquires the spectral information of a line through a slit in a direction perpendicular to the direction of motion; the dispersive element behind the slit spreads the light according to wavelength, and finally forms a spectral dimension on another dimension of the array detector.

[0047] Slit: The slit is one of the core optical components of a line-scan hyperspectral camera. It is used to limit the light incident on the dispersive element through the lens to a thin line, so that the light incident on the dispersive element corresponds to a row of pixels.

[0048] The technical problem to be solved by this utility model is described below.

[0049] Existing spectrophotometers use an integrating sphere light source to illuminate the sample, and their detectors are generally single-point spectrometers used to measure the spectral characteristics of a single point. Furthermore, the sample in existing spectrophotometers is stationary relative to the detector. Therefore, the detector can only perform image color measurements on a local area of ​​the sample at a time, and cannot generate a full-frame color image and perform image color measurements on a large sample at once. It also cannot further acquire color information from different locations on the sample. Therefore, in scenarios that require precise analysis of color differences at different locations on the sample, such as applications that identify fabric colors to inspect the quality of fabric printing, traditional spectrophotometers have significant limitations.

[0050] Therefore, to solve the above problems, this application provides a spectrophotometer that uses a two-dimensional moving platform to move the sample both perpendicular to the slit of the line-scan hyperspectral camera, enabling the camera to scan the sample surface and acquire color information, and parallel to the slit, adjusting the area that the camera can scan. This allows the camera to comprehensively acquire color information from the sample surface. Combined with a lighting component to provide uniform illumination to the scanned portion of the sample, this enables high-precision color information acquisition from a large sample area, generating a full-frame color image and performing color measurements. This facilitates further acquisition of color information from different locations on the sample, overcoming the limitations of existing spectrophotometers in terms of scannable area. It offers faster measurement speed and a larger measurement area, and can be used to accurately analyze color differences at different locations on the sample, showing broad application prospects.

[0051] The structure and principle of the spectrophotometer of this application will be described below with reference to several embodiments.

[0052] refer to Figure 1 and Figure 2 The working principle of the embodiments of this application will be described in general. Figure 1 This application illustrates a three-dimensional structure of a spectrophotometer according to an embodiment of the present application. Figure 2It shows Figure 1 The image shows the structure of the spectrophotometer viewed from below.

[0053] like Figure 1 As shown, the spectrophotometer in this embodiment includes a base 1 and a two-dimensional moving platform 2, and also includes, as shown in the figure, a base 1 and a two-dimensional moving platform 2, a two-dimensional moving platform 2 ... Figure 2 The sample lifting platform 3, gantry 4, illumination assembly 5, and line-scan hyperspectral camera 6 are shown. The gantry 4 is fixedly mounted on the base 1 and is used to fix the illumination assembly 5 and the line-scan hyperspectral camera 6.

[0054] like Figure 1 and 2 As shown, the two-dimensional moving platform 2 is fixedly installed on the surface of the base 1, and the sample lifting platform 3 is set on the two-dimensional moving platform 2. The two-dimensional moving platform 2 is used to drive the sample lifting platform 3 to move in two dimensions, that is, to drive the sample lifting platform 3 to move in two mutually perpendicular directions, so that the sample placed on the surface of the sample lifting platform 3 can move relative to the lighting component 5 and the line scan hyperspectral camera 6. This ensures that while the light generated by the lighting component 5 traverses the sample surface, the line scan hyperspectral camera 6 can simultaneously perform a traversal scan of the sample surface, thereby realizing a comprehensive scan of the sample and image color measurement.

[0055] like Figure 2 As shown, the lighting assembly 5 is positioned above the sample lifting platform 3. The lighting assembly 5 includes a diffuser 501 and a light source assembly 502. The diffuser 501 is fixedly mounted on the gantry 4 and positioned above the sample lifting platform 3. The surface of the diffuser 501 has a light-emitting hole 503, which is a linear opening and is positioned directly opposite the sample lifting platform 3.

[0056] The light source assembly 502 is fixedly mounted on the diffuser 501. The light source assembly 502 can send light into the diffuser 501. The light entering the diffuser 501 is reflected multiple times inside the diffuser 501, making the spatial distribution of the light tend to be uniform. This ensures the uniformity of the light emitted through the light exit hole 503, making the light passing through the light exit hole 503 and illuminating the sample surface uniform. This avoids errors in image color measurement results due to uneven light, effectively improving the accuracy of image color measurement.

[0057] A line-scan hyperspectral camera 6 is fixedly mounted on a diffuse reflector 501 and fixedly connected to a gantry 4. The line-scan hyperspectral camera 6 includes a slit, which is positioned directly opposite the light-emitting aperture 503, and the extension direction of the slit is the same as the extension direction of the linear light-emitting aperture 503. Light emitted through the light-emitting aperture 503 illuminates the sample surface. The light reflected from the sample passes through the lens of the line-scan hyperspectral camera 6 and enters the dispersive element through the slit. The dispersive element spreads the light according to wavelength, forming a spectrum, ultimately achieving line-scan spectral imaging and completing the color measurement of the sample image. The extension direction of the slit is perpendicular to one of the sample's two-dimensional movement directions and parallel to the other. When the sample moves perpendicular to the extension direction of the slit, the line-scan hyperspectral camera 6 can complete a linear scan of a specific area of ​​the sample surface; when the sample moves parallel to the extension direction of the slit, the sample area that the line-scan hyperspectral camera 6 can scan can be adjusted. By moving the sample in two dimensions, a line-scan hyperspectral camera can perform a full scan of the sample and measure the color of the image.

[0058] The spectrophotometer provided in this application embodiment uses a two-dimensional moving platform 2 to move the sample in a direction perpendicular to the slit of the line-scan hyperspectral camera 6, allowing the camera to scan the sample surface and acquire color information. It can also move in a direction parallel to the slit, adjusting the area that the camera can scan. Ultimately, the camera can comprehensively acquire color information from the sample surface. Combined with the illumination component 5, it provides uniform illumination to the scanned portion of the sample, achieving high-precision color information acquisition for a large sample area. This generates a full-frame color image and performs color measurements, facilitating further acquisition of color information at different locations on the sample. This overcomes the limitations of existing spectrophotometers in terms of scannable area, offering faster measurement speeds and larger measurement areas. It can be used to accurately analyze color differences at different locations on the sample and has broad application prospects.

[0059] refer to Figure 3 and Figure 4 , Figure 3 It shows Figure 1 The above view shows the front structure of the spectrophotometer. Figure 4 It shows along Figure 3 The cross-sectional structure of the spectrophotometer shown is cut along the AA line.

[0060] Combination Figure 3 and such Figure 4As shown, in this embodiment, the light source assembly 502 fixedly mounted on the diffuser 501 may include a light source 5021 and a baffle 5022. The light source 5021 is fixedly mounted on the diffuser 501 and is used to project light into the diffuser 501. The baffle 5022 is fixedly mounted on the inner wall surface of the diffuser 501 and positioned close to the light source 5021. The baffle 5022 blocks the light generated by the light source 5021, preventing the light from directly hitting the light exit hole 503. This ensures that the light generated by the light source 5021 is sufficiently and repeatedly reflected inside the diffuser 501 before passing through the light exit hole 503 and illuminating the sample surface, thereby making the light illuminating the sample surface uniform.

[0061] In this embodiment, the diffuse reflector 501 disposed above the sample lifting platform 3 is an integrating sphere. As a common type of diffuse reflector, the inner wall surface of the integrating sphere is coated with a highly reflective material, and its spherical shape characteristics are used to perform multiple and comprehensive diffuse reflections on the light rays incident from the light source assembly 502, so that the light rays are uniformly distributed inside the integrating sphere and then illuminate the sample surface through the light exit hole 503.

[0062] In this embodiment, a two-dimensional mobile platform (reference) Figure 1 The two-dimensional moving platform 2) includes a first electric guide rail 201 and a second electric guide rail 202. The first electric guide rail 201 is disposed on the surface of the base 1 along a first direction, and the second electric guide rail 202 is disposed on the first electric guide rail 201, moving along the first direction via the first electric guide rail 201. The second electric guide rail 202 extends along a second direction, and a sample lifting platform 3 is disposed on the second electric guide rail 202, directly moving along the second direction via the second electric guide rail 202.

[0063] The first and second directions are perpendicular. Through the cooperation of the first electric guide rail 201 and the second electric guide rail 202, the sample lifting platform 3 can be driven to move in a direction perpendicular to the extension direction of the light-emitting aperture 503. In this case, the sample moves in a direction perpendicular to the extension direction of the slit, enabling the line-scan hyperspectral camera 6 to scan and hyperspectral image a local area of ​​the sample. Alternatively, the sample lifting platform 3 can be driven to move in a direction parallel to the extension direction of the light-emitting aperture 503. In this case, the sample moves in a direction parallel to the extension direction of the slit, thereby adjusting the scannable area of ​​the line-scan hyperspectral camera 6. After hyperspectral scanning and imaging different areas of the sample by the line-scan hyperspectral camera 6, the hyperspectral images of different areas are stitched together using image stitching technology to obtain a complete hyperspectral image of the sample. This enables comprehensive scanning and image color measurement of the sample, allowing for precise analysis of color differences at different locations on the sample.

[0064] In this embodiment, the first direction is parallel to the extension direction of the light-emitting aperture 503, and correspondingly, the second direction is perpendicular to the extension direction of the light-emitting aperture 503. When performing local scanning and hyperspectral imaging of the sample using the line-scan hyperspectral camera 6, the sample lifting platform 3 and the sample need to be moved along the second direction via the second electric guide rail 202. At this time, the movement direction of the sample is perpendicular to the extension direction of the light-emitting aperture 503 and the extension direction of the slit. When it is necessary to adjust the scanned area of ​​the sample, the second electric guide rail 202 needs to be moved along the first direction via the first electric guide rail 201, so that the sample lifting platform 3 set on the second electric guide rail 202 and the sample placed on the sample lifting platform 3 move synchronously along the first direction, thereby adjusting the relative position of the sample with respect to the light-emitting aperture 503 and the slit, and realizing the adjustment of the scannable area of ​​the sample. Finally, different areas of the sample can be gradually scanned and hyperspectral imaged by the line-scan hyperspectral camera 6, and further, a comprehensive scan of the sample and image color measurement can be achieved through image stitching technology.

[0065] In other embodiments of this application, the first direction is perpendicular to the extension direction of the light-emitting aperture 503, and correspondingly, the second direction is parallel to the extension direction of the light-emitting aperture 503. When performing local scanning and hyperspectral imaging of the sample using the line-scan hyperspectral camera 6, the first electric guide rail 201 drives the second electric guide rail 202, the sample lifting platform 3, and the sample to move synchronously along the first direction. The direction of sample movement is perpendicular to both the extension direction of the light-emitting aperture 503 and the extension direction of the slit. When it is necessary to adjust the scannable area of ​​the sample, the second electric guide rail 202 drives the sample lifting platform 3 and the sample to move along the second direction, thereby adjusting the relative position of the sample with respect to the light-emitting aperture 503 and the slit, and thus adjusting the scanned area of ​​the sample. Ultimately, different areas of the sample can be gradually scanned by the line-scan hyperspectral camera 6 and hyperspectral imaging can be performed. Through image stitching, a comprehensive scan of the sample and image color measurement can be achieved.

[0066] In this embodiment, the sample lifting platform 3 includes a lifter 301 and a support plate 302. The lifter 301 is mounted on a second electric guide rail 202, which drives the lifter 301 to move. The lifter 301 includes a lifting end, and the support plate 302 is fixedly connected to the lifting end, supporting the sample. Since different samples have different thicknesses, the lifter 301 drives the support plate 302 to rise and fall, adjusting the height of the support plate 302 to adjust the distance between the sample and the light-emitting aperture 503. This ensures that the sample does not contact the diffuser 501, allowing the sample to be close to the light-emitting aperture 503, maximizing the concentration of light emitted from the aperture on the sample surface, thus ensuring the uniformity of light illuminating the sample surface. Because the sample does not contact the diffuser 501, the sample can move relative to the diffuser 501 and the line-scan hyperspectral camera 6, allowing it to be fully scanned by the line-scan hyperspectral camera 6.

[0067] This application does not limit the lifting drive method of the lifting device 301. The lifting device 301 can be an electric lifting device or a manual lifting device.

[0068] refer to Figure 5 , Figure 5 The present application illustrates a structure of a two-dimensional mobile platform 2 according to an embodiment of the present application.

[0069] like Figure 5 As shown, in some embodiments of this application, the two-dimensional moving platform 2 may further include an auxiliary support component 203. The auxiliary support component 203 cooperates with the first electric guide rail 201 to achieve two-point support for the second electric guide rail 202, ensuring that the second electric guide rail 202 remains stable, thereby ensuring that the sample remains stable during movement, avoiding deviations in the scanning results caused by sample tilting or shaking, and ensuring the accuracy of the scanning results and image color measurement structure.

[0070] The auxiliary support component 203 includes a guide rail 2031 and a moving component 2032. The guide rail 2031 is mounted on the base 1 and extends along a first direction. The moving component 2032 is movably mounted on the guide rail 2031, and its movement trajectory extends along the first direction. The moving component 2032 is fixedly connected to the second electric guide rail 202. Therefore, when the first electric guide rail 201 drives the second electric guide rail 202 to move along the first direction, the second electric guide rail 202 is supported by both the first electric guide rail 201 and the moving component 2032. Furthermore, the second electric guide rail 202 drives the moving component 2032 to move along the guide rail 2031. While supporting the second electric guide rail 202, the moving component 2032 does not obstruct its movement along the first direction.

[0071] When the second electric guide rail 202 drives the lifting device 301 to move in the second direction, under the action of gravity, the moving lifting device 301 and its mounted tray (see reference) Figure 4 The positions where the support plate 302 and the sample apply pressure to the second electric guide rail 202 can change. If only the first electric guide rail 201 provides single-point support, after long-term use, the second electric guide rail 202 is prone to tilting or wobbling due to the frequent changes in the position of the lifting device 301 applying pressure to it, thus affecting the stability of sample movement. Compared with single-point support, this embodiment of the application achieves dual-point support for the second electric guide rail 202 based on the auxiliary support component 203 and the first electric guide rail 201. The second electric guide rail 202 has a higher degree of stability and reliability, ensuring smooth sample movement and thus guaranteeing the accuracy of scanning results and image color measurement results.

[0072] In this embodiment, the moving component 2032 is a slider, which is slidably mounted on the guide rail 2031 and fixedly connected to the second electric guide rail 202. The slider supports the second electric guide rail 202, and when the second electric guide rail 202 moves along the first direction, the slider also moves synchronously along the guide rail 2031 under the drive of the second electric guide rail 202. Using a slider as the moving component 2032 has the advantages of simple structure and low manufacturing cost.

[0073] refer to Figure 6 and Figure 7 , Figure 6 This application illustrates a structure of an auxiliary support component 203 according to an embodiment of the present application. Figure 7 It shows Figure 6 The cross-sectional structure of the auxiliary support component 203 shown.

[0074] like Figure 6 and Figure 7 As shown, in some embodiments of this application, the surface of the guide rail 2031 is provided with a guide groove 7, which extends along a first direction. The moving component 2032 includes a moving block 8 and a roller 9. The moving block 8 is slidably disposed against the inner wall surface of the guide groove 7, and the moving block 8 is connected to the second electric guide rail (see reference). Figure 5 The second electric guide rail 202 is fixedly connected, and the roller 9 is rotatably mounted on the surface of the movable block 8. The roller 9 is rolled against the inner wall surface of the guide groove 7. The movable block 8 supports the second electric guide rail 202, and the roller 9 rolls against the inner wall of the guide groove 7, reducing the friction force on the movable block 8 when it moves with the second electric guide rail 202, making the movement of the movable block 8 smoother, and thus improving the smoothness of the translation of the second electric guide rail 202.

[0075] refer to Figure 8 , Figure 9 and Figure 10 , Figure 8 Another structure of the spectrophotometer shown is provided as an embodiment of this application. Figure 9 It shows Figure 8 The above view shows the front structure of the spectrophotometer. Figure 10 It shows along Figure 9 The cross-sectional structure of the spectrophotometer shown is cut along the BB line.

[0076] like Figure 8 , Figure 9 and Figure 10As shown, in some embodiments of this application, the diffuse reflector 501 is a cylindrical integrating cavity 10. The inner wall surface of the cylindrical integrating cavity 10 is coated with a highly reflective material. The cylindrical integrating cavity 10 utilizes its arc-shaped sidewalls and the highly reflective material coated on its inner wall surface to perform multiple diffuse reflections on the light incident from the light source assembly 502, so that the light is evenly distributed in the space. Furthermore, the light exit aperture 503 is opened on the arc-shaped sidewall of the cylindrical integrating cavity 10 and extends along the axial direction of the cylindrical integrating cavity 10. Since the light exit aperture 503 is positioned directly opposite the sample and is a linear opening, the distance between the light exit aperture 503 extending along the axial direction of the cylindrical integrating cavity 10 and the sample is equal at all points. This ensures that the light intensity of the light passing through the light exit aperture 503 and illuminating the sample is consistent, avoiding uneven linear light intensity illuminating the sample and causing errors in the image color measurement results, thereby further improving the accuracy of sample scanning and image color measurement.

[0077] In summary, this application utilizes a two-dimensional moving platform 2 to move the sample both perpendicular to the slit of the line-scan hyperspectral camera 6, enabling the camera to scan the sample surface and acquire color information, and parallel to the slit, adjusting the area that the camera can scan. This allows the camera to comprehensively acquire color information from the sample surface. Combined with the illumination component 5, this provides uniform illumination to the scanned portion of the sample, achieving high-precision color information acquisition over a large area, generating a full-frame color image, and performing color measurements. This facilitates further acquisition of color information from different locations on the sample, overcoming the limitations of existing spectrophotometers in terms of scannable area. It offers faster measurement speeds and a larger measurement area, and can be used to accurately analyze color differences at different locations on the sample, demonstrating broad application prospects.

[0078] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details have been omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0079] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0080] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0081] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0082] In the description of this application, it should be noted that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0083] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "fit" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0084] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A spectrophotometer characterized by comprising: include: abutment; A two-dimensional mobile platform is fixedly installed on the surface of the base. A sample lifting platform is mounted on the two-dimensional moving platform, which is used to drive the sample lifting platform to move in two dimensions. Lighting assembly, the lighting assembly comprising: A diffuse reflector, wherein a light-emitting hole is formed on the surface of the diffuse reflector, and the light-emitting hole is a linear opening and is positioned directly opposite the sample lifting platform; A light source assembly is fixedly mounted on the diffuser, and the light source assembly is used to inject light into the interior of the diffuser; A line-scan hyperspectral camera is fixedly mounted on the diffuse reflector. The line-scan hyperspectral camera includes a slit, which is positioned directly opposite the light-emitting aperture. The extension direction of the slit is the same as the extension direction of the light-emitting aperture. The extension direction of the slit is perpendicular to one of the two-dimensional movement directions of the sample and parallel to the other two-dimensional movement direction of the sample.

2. The spectrophotometer according to claim 1, characterized in that, The two-dimensional mobile platform includes: A first electric guide rail is disposed on the surface of the base along a first direction; The second electric guide rail is disposed on the first electric guide rail and extends along the second direction, and the sample lifting platform is disposed on the second electric guide rail; The first direction and the second direction are perpendicular.

3. Spectrophotometer according to claim 2, characterized in that The two-dimensional mobile platform also includes an auxiliary support component, which includes: A guide rail is disposed on the base and extends along the first direction; A movable component is movably disposed on the guide rail, the moving trajectory of the movable component extends along the first direction, and the movable component is fixedly connected to the second electric guide rail.

4. Spectrophotometer according to claim 3, characterized in that The moving component is a slider, which is slidably mounted on the guide rail and fixedly connected to the second electric guide rail.

5. Spectrophotometer according to claim 3, characterized in that The surface of the guide rail is provided with a guide groove, which extends along the first direction; The moving component includes: A movable block is slidably disposed against the inner wall surface of the guide groove, and the movable block is fixedly connected to the second electric guide rail; A roller is rotatably mounted on the surface of the movable block and is rolled against the inner wall surface of the guide groove.

6. The spectrocolorimeter according to claim 2, characterized in that, The sample lifting platform includes: A lifting device is mounted on a second electric guide rail, the second electric guide rail being used to drive the lifting device to move, and the lifting device includes a lifting end; A tray, which is fixedly connected to the lifting end, is used to support the sample.

7. The spectrocolorimeter according to claim 1, characterized in that, It also includes a gantry, one end of which is disposed on the surface of the base, and the other end is connected to the diffuse reflector and the line-scan hyperspectral camera.

8. The spectrocolorimeter according to claim 1, characterized in that, The light source assembly includes: A light source, which is fixedly mounted on the diffuser, is used to direct light into the interior of the diffuser; A baffle is fixedly installed on the inner wall surface of the diffuser and positioned close to the light source. The baffle is used to block the light generated by the light source from shining directly into the light outlet.

9. Spectrophotometer according to claim 8, characterized in that The diffuse reflector is an integrating sphere.

10. The spectrocolorimeter according to claim 8, characterized in that, The diffuse reflector is a cylindrical integrating cavity, inner wall surfaces of the cylindrical integrating cavity are coated with high reflection material, and the light outlet hole is arranged on an arc-shaped side wall of the cylindrical integrating cavity and extends along an axial direction of the cylindrical integrating cavity.

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