Absolute spectrum acquisition method and system

Abstract

The present application relates to the field of spectral acquisition technology, and more particularly to an absolute spectrum acquisition method and system. The absolute spectrum acquisition system method includes: acquiring light from an incident optical path within an optical channel; dividing the incident optical path into a first optical path and a second optical path; transmitting the light from the first optical path to an absolute spectrum acquisition module; transmitting the light from the second optical path to an image sensor; obtaining a calibrated optical image based on the sensing signal of the image sensor; the absolute spectrum acquisition module collects data on the light in the acquisition area within the detection image to obtain absolute spectrum information of the object under test. The optical imaging of the second optical path in the image sensor can be used to determine whether the light from the object under test can accurately enter the absolute spectrum acquisition module through the first optical path, thereby enabling the absolute spectrum acquisition module to accurately collect data on the object under test and reducing measurement errors.

Description

[0001] The priority basis includes: invention application with application number 2022110205286, patent name "Absolute spectrum acquisition method and system", and application date of August 24, 2022. Technical Field

[0002] The present application relates to the field of spectrum acquisition technology, and in particular to an absolute spectrum acquisition method and system. Background Art

[0003] The absolute spectrum acquisition system is a key component of a spectroradiometer, primarily used to collect the absolute spectrum of a light source to measure the spectral distribution, chromaticity, tristimulus values, brightness, and corrected color temperature across all wavelengths. This system offers advantages such as efficient low-brightness measurement, high-contrast measurement, high-precision and rapid measurement at low brightness levels, and low polarization error. It produces relatively stable measurement data even with light sources of varying characteristics and is currently widely used in color uniformity testing for screen light sources.

[0004] The absolute spectrum acquisition system in related technologies consists of a collection lens, a close-up lens (also known as an eyepiece), and a photodiode array. During the acquisition process, light from the object being measured first enters the absolute spectrum acquisition system through the collection lens. The intermediate light in the incident light then enters the photodiode array, while the marginal light in the incident light is reflected back to the close-up lens.

[0005] Common absolute spectrum acquisition systems can select different optical measurement angles depending on the application scenario, so that the relative position of the measured object in the acquisition image of the photodiode array is within the specified locking area. When measuring the measured object, the operator can indirectly determine the measured object by observing the position of the measured object's surrounding image in the eyepiece image through the close-up lens, and then manually move the acquisition lens so that the measured object is indirectly located in the specified locking area in the eyepiece image. The above adjustment method is based on direct observation of the close-up lens by the human eye, which is subject to human visual errors. At the same time, the middle part of the incident light is not perpendicular to the photodiode array and there is a certain angle. This will lead to measurement errors in absolute spectrum acquisition, especially when the measured object is a small area and cannot fill the entire detector acquisition image. The error will be greater when the measured object falls at different positions on the detector acquisition image. Summary of the Invention

[0006] This application provides an absolute spectrum acquisition method and system, which adopts the following technical solutions:

[0007] A method for acquiring an absolute spectrum comprises: acquiring light of an incident light path in an optical channel, wherein light emitted by a measured object enters the optical channel to form the incident light path; dividing the incident light path into a first light path and a second light path; propagating the light of the first light path to an absolute spectrum acquisition module; propagating the light of the second light path to an image sensor; obtaining a calibrated optical image based on a sensing signal of the image sensor, wherein the position of the light of the second light path in the calibrated optical image can reflect the position of the light of the first light path in a detection image of the absolute spectrum acquisition module; and the absolute spectrum acquisition module performing data acquisition on the light in a collection area in the detection image to obtain absolute spectrum information of the measured object.

[0008] Optionally, before the absolute spectrum acquisition module performs data acquisition on the light in the acquisition area in the detection screen to obtain the absolute spectrum information of the object under test, it also includes: acquiring a target position, wherein the target position is used to reflect the relative position of the object under test in the calibration optical image; determining a calibration area, wherein the calibration area is used to reflect the relative position of the acquisition area in the detection screen; judging whether the target position deviates from the calibration area, and outputting offset adjustment information based on the judgment result and the offset from the target position to the calibration area.

[0009] Optionally, it further includes: a moving calibration module driving the light incident component to move based on the offset adjustment information, so that the target position moves toward the calibration area.

[0010] An absolute spectrum acquisition system includes: a light incident component, which is provided with an optical channel, and light emitted by a measured object enters the optical channel to form the incident light path; a light splitting element, which passes through the incident light path and is used to split the incident light path into a first light path and a second light path; a spectrum connecting part, which is provided on the first light path and is used to transmit the light of the first light path to an absolute spectrum acquisition module; an image sensor connecting part, which is provided on the second light path and is used to transmit the light of the second light path to the image sensor; a photosensitivity control module, which is used to obtain a calibrated optical image based on a sensing signal of the image sensor, wherein the position of the light of the second light path in the calibrated optical image can reflect the position of the light of the first light path in the detection image of the absolute spectrum acquisition module; and the absolute spectrum acquisition module is used to collect data on the light in the acquisition area located in the detection image to obtain absolute spectrum information of the measured object.

[0011] Optionally, a target positioning module is used to obtain a target position, wherein the target position is used to reflect the relative position of the object under test in the calibration optical image; an initial calibration module is used to determine a calibration area, wherein the calibration area is used to reflect the relative position of the acquisition area in the detection image; and a deviation calculation module is used to determine whether the target position deviates from the calibration area, and output offset adjustment information based on the judgment result and the offset from the target position to the calibration area.

[0012] An absolute spectrum acquisition method and system utilizing the above technical solution divides the incident light path into a first light path and a second light path, and propagates them respectively to the absolute spectrum acquisition module and the image sensor, so that light emitted at the same position can be propagated to the image sensor and the absolute spectrum acquisition module respectively. Optical imaging of the second light path in the image sensor can determine whether the light of the object to be measured can accurately enter the absolute spectrum acquisition module through the first light path, thereby enabling the absolute spectrum acquisition module to accurately collect data on the object to be measured and reducing measurement errors.

[0013] A method for acquiring an absolute spectrum comprises: acquiring light of an incident light path in an optical channel, wherein light emitted by a measured object enters the optical channel to form the incident light path, and a function switching position is provided at the end of the optical channel, and the incident light path can be switched to a first light path or a second light path after passing through the function switching position; causing the light passing through the function switching position to propagate along the second light path to an image sensor; obtaining a calibrated optical image based on a sensing signal of the image sensor; causing the light passing through the function switching position to propagate along the first light path to an absolute spectrum acquisition module; wherein the position of the light of the second light path in the calibrated optical image can reflect the position of the light of the first light path in a detection image of the absolute spectrum acquisition module; and the absolute spectrum acquisition module performs data acquisition on the light in an acquisition area in the detection image to obtain absolute spectrum information of the measured object.

[0014] Optionally, before the step of causing the light passing through the function switching position to propagate along the first optical path to the absolute spectrum acquisition module, the method further includes: obtaining a target position, wherein the target position is used to reflect the relative position of the measured object in the calibration optical image; determining a calibration area, wherein the calibration area is used to reflect the relative position of the acquisition area in the detection image; judging whether the target position deviates from the calibration area, and outputting offset adjustment information based on the judgment result and the offset from the target position to the calibration area;

[0015] Optionally, it further includes: a moving calibration module driving the light incident component to move based on the offset adjustment information, so that the target position moves toward the calibration area.

[0016] Optionally, a spectrum connection part, an image sensor connection part and a movable block are provided at the function switching position, wherein the spectrum connection part corresponds to the first optical path, the image sensor connection part corresponds to the second optical path, and the movable block is used to drive the spectrum connection part or the image sensor connection part to move to the function switching position; the step of causing the light passing through the function switching position to propagate along the second optical path to the image sensor includes: the movable block drives the image sensor connection part to move to the function switching position, so that the incident optical path switches to the second optical path after passing through the function switching position, so that the light passing through the function switching position propagates along the second optical path to the image sensor; the step of causing the light passing through the function switching position to propagate along the first optical path to the absolute spectrum acquisition module includes: the movable block drives the spectrum connection part to move to the function switching position, so that the incident optical path switches to the first optical path after passing through the function switching position, so that the light passing through the function switching position propagates along the first optical path to the absolute spectrum acquisition module.

[0017] An absolute spectrum acquisition system includes: a light incident component, which is provided with an optical channel for acquiring light from the optical channel, wherein light emitted by the object to be measured enters the optical channel to form the incident light path, and a function switching position is provided at the end of the optical channel, and the incident light path can be switched to a first light path or a second light path after passing through the function switching position; a movable block, which is movably arranged on the light incident component; an image sensor connecting portion, which is arranged in an area where the movable block can pass through the function switching position, and is used to switch the incident light path to the second light path after passing through the function switching position, so that the light passing through the function switching position is propagated along the second light path to the image sensor; a photosensitive control module, which is used to obtain a calibrated optical image based on the sensing signal of the image sensor. ; A spectral connection portion is provided in an area where the movable block can pass through the function switching position, and is used to switch the incident light path into the first light path after passing through the function switching position, so that the light passing through the function switching position is propagated along the first light path to the absolute spectrum acquisition module; wherein, the position of the light of the second light path in the calibration optical image can reflect the position of the light of the first light path in the detection screen of the absolute spectrum acquisition module; a spectral connection portion is provided in an area where the movable block can pass through the function switching position, and is used to propagate the light passing through the function switching position to the absolute spectrum acquisition module; the absolute spectrum acquisition module is used to collect data on the light in the acquisition area in the detection screen to obtain the absolute spectrum information of the object under test.

[0018] Optionally, it also includes: a target positioning module, used to obtain the target position, wherein the target position is used to reflect the relative position of the object to be measured in the calibration optical image; an initial calibration module, used to determine the calibration area, wherein the calibration area is used to reflect the relative position of the acquisition area in the detection image; a deviation calculation module, used to determine whether the target position deviates from the calibration area, and output offset adjustment information based on the judgment result and the offset from the target position to the calibration area; optionally, it also includes: a moving calibration module, based on the offset adjustment information, driving the light incident component to move so that the target position moves toward the calibration area.

[0019] An absolute spectrum acquisition method and system utilizing the aforementioned technical solution propagates the incident light path to different terminals without changing the incident angle or the light itself, allowing light emitted from the same location to propagate separately to an image sensor and an absolute spectrum acquisition module. Optical imaging of the second light path in the image sensor determines whether light from the measured object can accurately enter the absolute spectrum acquisition module through the first light path, enabling the absolute spectrum acquisition module to accurately collect data on the measured object and reducing measurement errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram illustrating the appearance of the absolute spectrum acquisition system according to the first embodiment of the present application is shown;

[0021] Figure 2 A schematic diagram illustrating components such as a light incident component, a light splitting component, an absolute spectrum acquisition module, and an image sensor according to a first embodiment of the present application is depicted;

[0022] Figure 3 A conceptual schematic diagram illustrating an incident light path, a first light path, and a second light path of an absolute spectrum acquisition system according to a first embodiment of the present application is shown;

[0023] Figure 4 A conceptual schematic diagram illustrating the imaging effects of the first optical path and the second optical path of the absolute spectrum acquisition system according to the first embodiment of the present application;

[0024] Figure 5 A schematic diagram illustrating the process of the absolute spectrum acquisition method according to the first embodiment of the present application is shown;

[0025] Figure 6 A conceptual diagram illustrating the working mode of the absolute spectrum acquisition method according to the first embodiment of the present application;

[0026] Figure 7 A schematic diagram illustrating the functional modules of the absolute spectrum acquisition system according to the first embodiment of the present application is shown;

[0027] Figure 8 A schematic diagram illustrating the process of the absolute spectrum acquisition method according to the second embodiment of the present application is shown;

[0028] Figure 9 A conceptual diagram illustrating the calibration of an optical image in the absolute spectrum acquisition method according to the second embodiment of the present application is shown;

[0029] Figure 10 A schematic diagram illustrating the working state of the absolute spectrum acquisition system according to the second embodiment of the present application is shown;

[0030] Figure 11 A schematic diagram illustrating the functional modules of the absolute spectrum acquisition system according to the second embodiment of the present application is shown;

[0031] Figure 12 A schematic diagram illustrating the appearance of an absolute spectrum acquisition system according to a third embodiment of the present application is shown;

[0032] Figure 13 A schematic diagram illustrating components such as a light input component, an absolute spectrum acquisition module, and an image sensor according to a third embodiment of the present application is shown;

[0033] Figure 14 Schematic diagrams illustrating the working state of the absolute spectrum acquisition system in different states according to the third embodiment of the present application are shown, wherein the image sensor connection portion in FIG (a) is in the function switching position, and the spectrum connection portion in FIG (b) is in the function switching position;

[0034] Figure 15 A conceptual schematic diagram illustrating the imaging effects of the first optical path and the second optical path of the absolute spectrum acquisition system according to the third embodiment of the present application;

[0035] Figure 16 A schematic diagram illustrating components such as a light-incident lens, a light-incident bracket, a light transmitter, and a movable block according to a third embodiment of the present application is provided;

[0036] Figure 17 A schematic diagram illustrating components such as an active block, an image sensor connection portion, and a spectrum connection portion of a third embodiment of the present application is depicted;

[0037] Figure 18 A schematic diagram illustrating components such as a movable block and a driving module according to a third embodiment of the present application is shown;

[0038] Figure 19 A schematic diagram illustrating the process of the absolute spectrum acquisition method according to the third embodiment of the present application is shown;

[0039] Figure 20 A conceptual schematic diagram illustrating the working mode of the absolute spectrum acquisition method according to the third embodiment of the present application, wherein the image sensor connection portion in FIG (c) is located in the function switching position, and the spectrum connection portion in FIG (d) is located in the function switching position;

[0040] Figure 21A schematic diagram illustrating the functional modules of the absolute spectrum acquisition system according to the third embodiment of the present application is shown;

[0041] Figure 22 A schematic diagram illustrating the process of the absolute spectrum acquisition method according to the fourth embodiment of the present application is shown;

[0042] Figure 23 A schematic diagram illustrating the working state of the absolute spectrum acquisition system according to the fourth embodiment of the present application is shown;

[0043] Figure 24 A schematic diagram of the functional modules of the absolute spectrum acquisition system according to the fourth embodiment of the present application is shown.

[0044] Description of reference numerals:

[0045] 1. Light input assembly; 11. Light input bracket; 12. Light input lens; 13. Light transmitter; 14. Dark bottom buckle; 15. Spectrum connection part; 16. Image sensor connection part; 17. Function switch position; 2. Spectrum splitter; 3. Absolute spectrum acquisition module; 31. Detection screen; 32. Acquisition area; 4. Image sensor; 41. Calibration optical image; 42. Target position; 43. Calibration area; 5. Housing; 51. Display screen; 6. Optical adjustment part; 61. Attenuation plate; 62. Filter hole; 63. Aperture adjustment plate; 64. Light path hole; 7. Movable block; 8. Drive assembly; 10. Photosensitive control module; 20. Target positioning module; 30. Initial calibration module; 40. Deviation calculation module; 50. Mobile calibration module; 60. Sensor switching module; 70. Spectrum switching module. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] The following is attached with the instruction manual Figure 1-Figure 24 The embodiments of the present invention are described in further detail.

[0048] The embodiment of the present application discloses an absolute spectrum acquisition system.

[0049] Example 1:

[0050] Reference Figure 1 and Figure 2The absolute spectrum acquisition system includes a light input component 1, a light splitting component 2, a spectrum connection part 15, an image sensor connection part 16, a photosensitivity control module 10, an absolute spectrum acquisition module 3 and a housing 5.

[0051] Reference Figure 1 and Figure 2 The light-incoming component 1 is fixed to the housing 5, and allows the light emitted by the object to enter the interior of the housing 5. The light-incoming component 1 is provided with an optical channel, and the light emitted by the object to enter the optical channel forms the incident light path for propagation.

[0052] Reference Figure 1 and Figure 2 The beam splitter 2 is fixed in the housing 5 and is disposed at the end of the incident light path for splitting the incident light path into a first light path and a second light path.

[0053] Reference Figure 3 The beam splitter 2 is preferably an optical device such as a beam splitter or a half-silvered mirror that can split the optical path into multiple paths. When light from the incident optical path passes through the beam splitter 2, it transmits a light path that is collinear with the incident optical path. This light path is the first optical path. Simultaneously, the light from the incident optical path is also reflected to form a light path that is angled relative to the incident optical path. This light path is the second optical path.

[0054] Reference Figure 3 The spectrum connection part 15 is arranged on the first optical path, connected between the light splitting element 2 and the absolute spectrum acquisition module 3, and is used to transmit the light of the first optical path to the absolute spectrum acquisition module 3.

[0055] Reference Figure 3 and Figure 4 The absolute spectrum acquisition module 3 is configured to collect data from light within a collection area 32 within its detection image 31 to obtain absolute spectrum information of the object being measured. Specifically, the absolute spectrum acquisition module 3 is preferably a photodiode array, and the detection image 31 of the absolute spectrum acquisition module 3 refers to the collection image of the photodiode array.

[0056] Reference Figure 3 and Figure 4 A collection area 32 is preset in the detection screen 31. When the light of the object to be measured falls on the collection area 32 of the detection screen 31, the calculation error of the absolute spectrum acquisition module 3 for data collection of the object to be measured is within the allowable error range.

[0057] The image sensor connecting portion 16 is disposed on the second optical path and connected between the beam splitter 2 and the image sensor 4 , and is used to transmit the light of the second optical path to the image sensor 4 .

[0058] When the light propagates to the image sensor 4, the light falls on the photosensitive surface of the image sensor 4. The image sensor 4 uses the photoelectric conversion function to convert the light image on the photosensitive surface into an electrical signal that is proportional to the light image, thereby outputting a sensing signal based on the light received in the second optical path.

[0059] The light-sensing control module 10 is electrically connected to the image sensor 4 . After receiving the sensing signal from the image sensor 4 , the light-sensing control module 10 obtains a calibrated optical image 41 based on the sensing signal.

[0060] Since the first optical path and the second optical path both originate from the incident optical path, the first optical path and the second optical path are consistent in optical imaging. Therefore, the relative position of the light of the second optical path in the calibration optical image 41 can reflect the relative position of the light of the first optical path in the detection screen 31 of the absolute spectrum acquisition module 3.

[0061] Furthermore, the optical image displayed by the image sensor 4 based on the light from the second optical path can reflect the content of the light from the first optical path entering the absolute spectrum acquisition module 3. Furthermore, because the first optical path is formed by the incident light path transmitting through the beam splitter 2, and the second optical path is formed by the incident light path refracted at the beam splitter 2, the positions of the first and second optical paths on the incident light path correspond. This prevents the light from the first optical path from approaching the middle light of the incident light path and the light from the second optical path from approaching the edge light of the incident light path. Consequently, the light from the first optical path and the second optical path are more consistent.

[0062] In a test scenario of actual application, for example, when testing the brightness uniformity of a designated test position on an LED screen, the object to be tested is the test position on the LED screen. The light from the LED screen can enter the light input component 1 to form an incident light path, and the incident light path is divided into a first light path and a second light path. The second light path propagates to the image sensor 4 to obtain a corresponding calibrated optical image 41. The relative position of the light of the second light path in the optical image is used to determine whether the deviation of the position of the light of the first light path in the detection screen 31 to the collection area 32 under the same state is within the allowable deviation range.

[0063] If so, it means that the light in the first optical path can reach the collection area 32, and the absolute spectrum collection module 3 can directly collect data on the first optical path to obtain the absolute spectrum information of the object under test.

[0064] If not, the relative position between the light incident component 1 and the object to be measured can be adjusted until the relative position of the light of the second optical path in the optical image is within the specified area, so that under the same state, the deviation of the position of the light of the first optical path in the detection image 31 to the acquisition area 32 is within the allowable deviation range, and then data is collected on the first optical path through the absolute spectrum acquisition module 3 to obtain the absolute spectrum information of the object to be measured.

[0065] It can be understood that the technical solution in Example 1 of the present application is to divide the incident light path into a first light path and a second light path, and propagate them to the absolute spectrum acquisition module 3 and the image sensor 4 respectively, so that the light emitted at the same position can be propagated to the image sensor 4 and the absolute spectrum acquisition module 3 respectively. The optical imaging of the second light path in the image sensor 4 can determine whether the light of the object to be measured can be accurately incident on the absolute spectrum acquisition module 3 through the first light path, so that the absolute spectrum acquisition module 3 can accurately collect data on the object to be measured, reducing measurement errors. Compared with the technical solutions in the background technology, the technical solution of the present application, on the one hand, eliminates the setting of the eyepiece (close-up lens), replaces the adjustment of the eyepiece for direct observation by the human eye, reduces the error of human vision, and at the same time, the light is vertically incident on the absolute spectrum acquisition module, thereby improving the measurement accuracy during absolute spectrum acquisition. Moreover, since the first optical path is formed by the incident light path passing through the spectrometer 2, and the second optical path is formed by refraction at the spectrometer 2 on the incident light path, the light distribution of the first optical path and the second optical path relative to the incident light path is almost the same, and there will be no situation where the light of the first optical path approaches the middle light of the incident light path and the light of the second optical path approaches the edge light of the incident light path. Therefore, the optical image in the image sensor 4 can more accurately complete the content of the absolute spectrum acquisition module 3.

[0066] Reference Figure 1 and Figure 2 Regarding the specific structure of the light incident assembly 1, in this embodiment, the light incident assembly 1 includes a light incident bracket 11 and a light incident lens 12. The light incident lens 12 is embedded and fixed on the housing 5, and one end of the light incident lens 12 is exposed outside the housing 5 to receive light. The central axis direction of the light incident lens 12 is set in the horizontal direction.

[0067] The light bracket is fixedly installed in the shell 5, and a receiving hole is opened at one end of the light input bracket 11 facing the light input lens 12. The shape contour inside the receiving hole matches the shape contour of the light output end of the light input lens 12, and the light output end of the light input lens 12 is accommodated in the receiving hole.

[0068] The light-entry bracket 11 defines a beam splitter hole for accommodating the beam splitter 2, which is fixedly mounted within the beam splitter hole. The beam splitter hole communicates with the receiving hole and passes through the central axis of the light-entry lens 12, allowing the beam splitter hole and the beam splitter 2 located within the beam splitter hole to align with the light-emitting end of the light-entry lens 12.

[0069] In the internal structure of the light incident bracket 11 , the space between the light incident lens 12 and the beam splitter 2 forms an optical channel. The light incident on the light incident lens 12 forms an incident light path after passing through the optical channel, and the light in the incident light path propagates to the beam splitter 2 .

[0070] In this embodiment, the central axis of the light-input lens 12 is arranged horizontally, the optical channel is also arranged horizontally, and the incident light path extends horizontally. In some embodiments, the central axis of the light-input lens 12 can also be arranged in an inclined or vertical direction, and the arrangement direction of the optical channel and the extension direction of the incident light path will also change accordingly.

[0071] In this embodiment, the light-incident bracket 11 wraps the light-emitting end of the light-incident lens 12 to form a sealed light-shielding structure, so as to block the influence of light that does not enter the light-incident lens 12 on the light on the incident light path from the inside of the housing 5 .

[0072] In this embodiment, the absolute spectrum acquisition module 3 is arranged on the side of the light input bracket 11 away from the light input lens 12, and the image sensor 4 is arranged at the lower part of the light input bracket 11. The splitting hole is connected to the side of the light input bracket 11 facing the absolute spectrum acquisition module 3, so that the first light path separated by the splitting element 2 can point to the absolute spectrum acquisition module 3. The splitting hole is also connected to the lower end of the light input bracket 11, so that the second light path separated by the splitting element 2 can point to the image sensor 4.

[0073] Regarding the way in which the light of the second optical path propagates to the image sensor 4 , in this embodiment, a connecting hole is opened at the lower portion of the light incident bracket 11 , the image sensor 4 is arranged at the connecting hole, the connecting hole is connected to the spectroscopic hole, and the connecting hole forms the image sensor connecting portion 16 .

[0074] Referring to the figure, regarding the specific description of the image sensor 4, in this embodiment, the image sensor 4 is preferably a CCD camera, and the image sensor 4 is fixed to the lower part of the light incident bracket 11. The photosensitive surface of the image sensor 4 is vertically facing the spectrometer 2 from bottom to top through the connecting hole to receive the light of the second optical path.

[0075] Regarding how the light from the first optical path is transmitted to the absolute spectrum acquisition module 3, in this embodiment, a light transmitter 13 is connected to the light input bracket 11, and the spectroscopic aperture is aligned with the light transmitter 13 to transmit the light to the light transmitter 13. In this embodiment, the spectrum connection portion 15 is specifically a fiber optic connector. One end of the light transmitter 13 is aligned with the spectroscopic aperture of the light input bracket 11 and sealedly connected, and the other end of the light transmitter 13 is connected to the fiber optic connector.

[0076] In this embodiment, the collection input end of the absolute spectrum collection module 3 is aligned with the beam splitter 2, and the central axis of the collection input end of the absolute spectrum collection module 3 is parallel to or collinear with the central axis of the light input lens 12. Light from the light input lens 12 passes through the beam splitter 2, propagates to the optical fiber connector, and then propagates into the collection input end of the absolute spectrum collection module 3.

[0077] Regarding the further description of the relevant components of the light-incoming assembly 1, in this embodiment, a dark bottom buckle 14 is provided at one end of the light transmitter 13 close to the spectral connection part 15. The dark bottom buckle 14 is set on the light transmitter 13 in a direction perpendicular to the axis of the light transmitter 13 and is fixedly connected to the light transmitter 13. The dark bottom buckle 14 is preferably an electronic shutter.

[0078] The dark bottom button 14 can be opened / closed by a built-in shutter closing switch. When the shutter of the dark bottom button 14 is closed, the light propagation between the light transmitter 13 and the spectrum connection part 15 can be blocked. At this time, the absolute spectrum acquisition module 3 can collect data of the device under lightless conditions; when the shutter of the dark bottom button 14 is opened, the light of the light transmitter 13 can be transmitted to the spectrum connection part 15. At this time, the absolute spectrum acquisition module 3 can collect the absolute spectrum information of the object under test.

[0079] Regarding the further description of the relevant components of the light incident component 1, in this embodiment, the light incident component 1 is also configured with an optical adjustment component 6, which is arranged between the light incident component 1 and the spectrum connection part 15 through the light transmitter 13, and is used to adjust the optical properties of the light entering the absolute spectrum acquisition module 3, which helps to collect the absolute spectrum.

[0080] The optical adjustment component 6 includes one or more combinations of an attenuation plate 61 and an aperture adjustment plate 63. The optical adjustment component 6 passes through the light path in the optical channel. Among them, the attenuation plate 61 can change the attenuation intensity of the light entering the absolute spectrum acquisition module 3, and the aperture adjustment plate 63 can change the size range of the light area entering the absolute spectrum acquisition module 3.

[0081] The sidewall of the light transmitter 13 defines adjustment holes for the attenuation plate 61 and the aperture adjustment plate 63 to enter the optical channel. The attenuation plate 61 and the aperture adjustment plate 63 are inserted into their corresponding adjustment holes. In this embodiment, light entering the light transmitter 13 first passes through the aperture adjustment plate 63 and then through the attenuation plate 61.

[0082] The aperture adjustment plate 63 is rotatably mounted on the light-entering bracket 11. A plurality of apertures 64 are defined around the aperture adjustment plate 63's rotational axis. The centerlines of the apertures 64 are collinear or parallel to the central axis of the light-entering lens 12, and the inner diameters of the apertures 64 vary. The apertures 64 can restrict the range of light passing through them. A larger inner diameter of an aperture 64 increases the area of ​​light that can pass through it, thus expanding the imaging range. Conversely, a smaller inner diameter reduces the area. The aperture adjustment plate 63 can be used to position a specific aperture 64 within the optical channel, thereby adjusting the degree to which the aperture 64 restricts light passing through the optical channel.

[0083] In this embodiment, the aperture adjustment piece 63 is powered by a first adjustment power source to achieve rotation, and the first adjustment power source is a motor.

[0084] Furthermore, an attenuation plate 61 is rotatably mounted on the light-entering bracket 11. Multiple filter apertures 62 are defined around the plate's rotational axis, with the centerlines of these apertures collinear or parallel to the central axis of the light-entering lens 12. Each aperture 62 houses a fixed filter, each with different filtering properties. By rotating the attenuation plate 61, a specific filter can be positioned within the optical path, and adjusting the plate 61 can adjust the degree of light attenuation.

[0085] In this embodiment, the attenuation plate 61 is powered by a second regulating power source to achieve rotation, and the second regulating power source is a motor.

[0086] In this embodiment, an absolute spectrum acquisition method is provided. This absolute spectrum acquisition method corresponds to the various functional components in the absolute spectrum acquisition system in the above embodiment, including the light input component 1, the light splitting component 2, the spectrum connection part 15, the absolute spectrum acquisition module 3, the image sensor connection part 16, the image sensor 4, etc.

[0087] The absolute spectrum acquisition method includes the following steps:

[0088] Reference Figure 5 and Figure 6 , S101, obtaining light of an incident light path in an optical channel.

[0089] The light-incoming component 1 obtains the light of the incident light path in the optical channel. The light emitted by the object to be measured enters the optical channel of the light-incoming component 1, forming the incident light path.

[0090] S102: Split the incident light path into a first light path and a second light path.

[0091] The beam splitter 2 splits the incident light path into a first light path and a second light path. After the incident light path passes through the beam splitter 2, part of the incident light path passes through the beam splitter 2 to form the first light path, and part of the incident light path is reflected on the beam splitter 2 to form the second light path.

[0092] It is worth noting that the above-mentioned process of dividing the incident light path into multiple ones can also be called spectrometry. The spectrometry in the technical solution of this application is the indiscriminate spectrometry of the light in the incident light path, and is not for the specified position of the light in the incident light path, such as the middle position and the edge light position in the incident light path.

[0093] In some feasible embodiments, the light path formed by a part of the incident light path passing through the spectrometer 2 can be used as the second light path, and the light path formed by a part of the incident light path reflected on the spectrometer 2 can be used as the first light path. There is no restriction on this in the embodiments of the present application, as long as the effect of splitting the incident light path can be achieved.

[0094] S103 , propagate the light of the second optical path to the image sensor 4 .

[0095] The image sensor connection portion 16 transmits the light of the second optical path to the image sensor 4. When the light reaches the image sensor 4, it falls on the photosensitive surface of the image sensor 4. The image sensor 4 uses its photoelectric conversion function to convert the light image on the photosensitive surface into an electrical signal proportional to the light image, thereby outputting a sensing signal based on the received light of the second optical path.

[0096] S104 , obtaining a calibrated optical image 41 based on the sensing signal of the image sensor 4 .

[0097] After receiving the sensing signal from the image sensor 4 , the light sensing control module 10 obtains a calibrated optical image 41 based on the sensing signal.

[0098] S105 , propagate the light of the first optical path to the absolute spectrum acquisition module 3 .

[0099] The spectrum connection unit 15 transmits the light of the first optical path to the absolute spectrum acquisition module 3 .

[0100] The position of the light of the second optical path in the calibration optical image 41 can reflect the position of the light of the first optical path in the detection image 31 of the absolute spectrum acquisition module 3 .

[0101] In this embodiment, a display screen 51 is installed on the outside of the shell 5. The display screen 51 is electrically connected to the photosensitive control module 10. It can display the calibrated optical image 41 of the photosensitive control module 10 in real time based on the influence data transmitted by the photosensitive control module 10, so that the operator can observe the calibrated optical image 41 corresponding to the second optical path.

[0102] In a test scenario of actual application, for example, when testing the brightness uniformity of a designated test position on an LED screen, the object to be tested is the test position on the LED screen. The light from the LED screen can enter the light-input component 1 to form an incident light path, and the incident light path is divided into a first light path and a second light path. The second light path propagates to the image sensor 4 to obtain a corresponding calibrated optical image 41. The relative position of the light of the second light path in the optical image is used to determine whether the deviation of the position of the light of the first light path in the detection screen 31 to the collection area 32 under the same state is within the allowable deviation range. If so, it means that the light emitted by the object to be tested can reach the collection area 32 in the first light path, and the data of the first light path can be directly collected through the absolute spectrum collection module 3 to obtain the absolute spectrum information of the object to be tested.

[0103] If not, the relative position between the light incident component 1 and the object to be measured can be adjusted until the relative position of the light emitted by the object to be measured in the optical image is within the specified area range, so that under the same state, the deviation of the position of the light of the first optical path in the detection image 31 to the collection area 32 is within the allowable deviation range, and then step S106 is executed.

[0104] S106 , the absolute spectrum acquisition module 3 acquires data on the light in the acquisition area 32 in the detection image 31 to obtain absolute spectrum information of the object under test.

[0105] The absolute spectrum acquisition module 3 acquires data from the first optical path to obtain absolute spectrum information of the measured object.

[0106] Reference Figure 1 and Figure 2 In a specific embodiment, the absolute spectrum acquisition method further includes the following steps:

[0107] S201 : Obtain an aperture adjustment instruction, and control the operation of a first adjustment power source based on the aperture adjustment instruction.

[0108] The aperture adjustment instruction is used to control the operation of the first adjustment power source to rotate the aperture adjustment plate 63 to a specified angle, thereby limiting the light entering the absolute spectrum acquisition module 3 to a specified light area size range and imaging range.

[0109] S202: Obtain a decay adjustment instruction, and control the second regulating power source to operate based on the decay adjustment instruction.

[0110] The attenuation adjustment instruction is used to control the operation of the second adjustment power source to rotate the attenuation plate 61 to a specified angle, thereby limiting the light entering the absolute spectrum acquisition module 3 to a specified attenuation strength.

[0111] In a specific embodiment, the absolute spectrum acquisition method further includes the following steps:

[0112] S302: Obtain a shutter switch instruction, and control the dark bottom button 14 to switch the switch mode based on the shutter switch instruction.

[0113] Among them, the shutter switching instruction controls the built-in shutter closing switch of the dark bottom buckle 14 to realize the opening / closing of the dark bottom buckle 14. When the shutter of the dark bottom buckle 14 is closed, the light propagation between the light transmitter 13 and the spectrum connection part 15 can be blocked. At this time, the absolute spectrum acquisition module 3 can collect data of the device under lightless conditions; when the shutter of the dark bottom buckle 14 is opened, the light of the light transmitter 13 can be transmitted to the spectrum connection part 15. At this time, the absolute spectrum acquisition module 3 can collect the absolute spectrum information of the object under test.

[0114] In this embodiment, the display screen 51 installed on the housing is a touch screen, and the operator can send control instructions by clicking the software interface on the touch screen, thereby outputting aperture adjustment instructions, attenuation adjustment instructions or shutter switching instructions.

[0115] Corresponding to the above-mentioned methods of step S201, step S202, and step S301, the absolute spectrum acquisition system further includes an aperture control module, an attenuation control module, and a shutter switching module. Detailed descriptions of each functional module are as follows:

[0116] The aperture control module is used to obtain the aperture adjustment instruction and control the operation of the first adjustment power source based on the aperture adjustment instruction.

[0117] The attenuation control module is used to obtain the attenuation adjustment instruction and control the operation of the second adjustment power source based on the attenuation adjustment instruction.

[0118] The shutter switching module is used to obtain a shutter switching instruction and control the dark bottom button 14 to switch the switch mode based on the shutter switching instruction.

[0119] Reference Figure 7 The absolute spectrum acquisition system provided in the first embodiment further includes a control device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, steps S105, S201, S202, and S301 of the absolute spectrum acquisition method of the first embodiment described above are implemented. Alternatively, when the processor executes the computer program, the functions of the photosensitivity control module 10, the aperture control module, the attenuation control module, and the shutter switching module of the above embodiments are implemented.

[0120] The absolute spectrum acquisition method provided in this embodiment is implemented based on the various components of the absolute spectrum acquisition system in the above-mentioned embodiment 1, and can achieve the same technical effects as the absolute spectrum acquisition system in embodiment 1. The principle analysis can be found in the above-mentioned related description, which will not be repeated here.

[0121] Example 2:

[0122] Reference Figure 8 and Figure 9 The absolute spectrum acquisition method of the embodiment of the present application differs from the absolute spectrum acquisition method of the first embodiment in that, after step S104 and before step S106, that is, after obtaining the calibrated optical image 41 based on the sensing signal of the image sensor 4 and before the absolute spectrum acquisition module 3 acquires data of the light in the acquisition area 32 in the detection image 31 to obtain the absolute spectrum information of the object under test, the following steps are further included:

[0123] S401. Obtain target position 42.

[0124] The target position 42 is used to reflect the relative position of the measured object in the calibration optical image 41 in real time.

[0125] In this embodiment, the system can use a deep-learned image recognition algorithm to mark the position of the object under test in the calibration optical image 41 to obtain the target position 42. In some embodiments, the operator can also manually mark the position of the object under test in the calibration optical image 41 to obtain the target position 42.

[0126] When the light incident component 1 and the object to be measured move relative to each other, the position of the light emitted by the object to be measured relative to the light incident component 1 will change, causing the light composition in the incident light path to change, and the target position 42 will also move in real time.

[0127] S402: Determine the calibration area 43.

[0128] The calibration area 43 is used to reflect the relative position of the acquisition area 32 in the detection image 31. The calibration area 43 can be set according to an empirical value or according to the device parameters of the absolute spectrum acquisition module 3.

[0129] S403 , determining whether the target position 42 deviates from the calibration area 43 , and outputting offset adjustment information based on the offset from the target position 42 to the calibration area 43 according to the determination result.

[0130] Among them, the specific method for determining whether the target position 42 deviates from the calibration area 43 is: project the target position 42 and the calibration area 43 into the same coordinate system, first calculate the spacing distance from the target position 42 to the calibration area 43, and then determine whether this spacing distance is within the allowable deviation range.

[0131] The spacing distance may be calculated as the distance between the center points of the two or as the minimum distance between the edges of the two. The spacing distance may be set according to the actual application scenario, and the deviation range may also be set according to the actual application scenario.

[0132] If the distance between the target position 42 and the calibration area 43 is within the deviation range, the target position 42 is not deviated from the calibration area 43, indicating that in this state, the light emitted by the object under test can reach the collection area 32 in the first optical path, and step S106 can be directly executed.

[0133] If the distance between the target position 42 and the calibration area 43 exceeds the deviation range, the target position 42 deviates from the calibration area 43, indicating that in this state, the light emitted by the object under test cannot reach the collection area 32 in the first optical path. At this time, the offset adjustment information will be output according to the offset from the target position 42 to the calibration area 43.

[0134] The offset adjustment information includes the offset direction between the target position 42 and the calibration area 43, and the offset distance between the target position 42 and the calibration area 43 in the offset direction. The target position 42 can be moved into the calibration area 43 by moving the specified offset distance in the offset direction.

[0135] S404 : Based on the offset adjustment information, drive the light incident component 1 to move.

[0136] Reference Figure 10 , wherein the mobile calibration module 50 drives the light incident component 1 to move to the specified position based on the deviation direction and offset distance in the offset adjustment information.

[0137] In this embodiment, the mobile calibration module 50 adopts a multi-axis robotic arm, and the housing 5 is fixedly connected to the movable end of the multi-axis robotic arm.

[0138] Reference Figure 10 and Figure 11 The absolute spectrum acquisition system of the present embodiment differs from the absolute spectrum acquisition system of the first embodiment in that it further includes: a target positioning module 20, an initial calibration module 30, a deviation calculation module 40, and a movement calibration module 50. The functional modules are described in detail as follows:

[0139] The target positioning module 20 is used to obtain a target position 42 , wherein the target position 42 is used to reflect the relative position of the measured object in the calibration optical image 41 .

[0140] The initial calibration module 30 is used to determine a calibration area 43 , wherein the calibration area 43 is used to reflect the relative position of the acquisition area 32 in the detection image 31 .

[0141] The deviation calculation module 40 is used to determine whether the target position 42 deviates from the calibration area 43 , and output deviation adjustment information based on the deviation from the target position 42 to the calibration area 43 according to the determination result.

[0142] The movement calibration module 50 is used to drive the light incident component 1 to move based on the offset adjustment information.

[0143] In the absolute spectrum acquisition system provided in the second embodiment, the processor of the control device, when executing the computer program, further implements steps S401 through S403 of the absolute spectrum acquisition method of the first embodiment described above. Alternatively, the processor, when executing the computer program, further implements the functions of the target positioning module 20, the initial calibration module 30, and the deviation calculation module 40 of the aforementioned embodiment.

[0144] Example 3:

[0145] The absolute spectrum acquisition system of the embodiment of the present application differs from the absolute spectrum acquisition system of the first embodiment in that the absolute spectrum acquisition system cancels the setting of dividing the incident light path into multiple ones, and instead sets the incident light path to be emitted to different devices.

[0146] Reference Figure 12 The absolute spectrum acquisition system includes a light input component 1, a movable block 7, an absolute spectrum acquisition module 3 and a housing 5.

[0147] Reference Figure 12 and Figure 13 The light-incoming assembly 1 is fixed to the housing 5 and allows light emitted by the object to enter the interior of the housing 5. The light-incoming assembly 1 is provided with an optical channel, and the light emitted by the object to enter the optical channel forms the incident light path for propagation. The end of the optical channel is provided with a function switch position 17, and the incident light path can be switched to the first light path or the second light path after passing through the function switch position 17.

[0148] The movable block 7 is movably arranged on the light incident component 1 , and can pass through the function switching position 17 when the movable block 7 rotates.

[0149] The movable block 7 is provided with a spectrum connection part 15 in the area where the function switch position 17 can pass, and the spectrum connection part 15 is connected to the absolute spectrum acquisition module 3. When the movable block 7 drives the spectrum connection part 15 to move to the function switch position 17,

[0150] The incident light path is switched to the first light path after passing through the function switching position 17 and propagates to the spectrum connection part 15 , so that the light passing through the function switching position 17 propagates along the first light path to the absolute spectrum acquisition module 3 .

[0151] An image sensor connection portion 16 is also provided in the area where the movable block 7 can pass through the function switching position 17, and the image sensor connection portion 16 is connected to the image sensor 4. When the movable block 7 drives the image sensor connection portion 16 to move to the function switching position 17, the incident light path switches to a second light path that propagates to the image sensor connection portion 16 after passing through the function switching position 17, so that the light that passes through the function switching position 17 propagates along the second light path to the image sensor 4.

[0152] Reference Figure 14 and Figure 15 The absolute spectrum acquisition module 3 is used to collect data from light within a collection area 32 within its detection screen 31 to obtain absolute spectrum information of the object under test. The detection screen 31 is pre-set with a collection area 32. When light from the object under test falls within the collection area 32 within the detection screen 31, the calculation error of the absolute spectrum acquisition module 3 in collecting data from the object under test is within the allowable error range.

[0153] The image sensor 4 is electrically connected to the light-sensing control module 10 . After receiving the sensing signal from the image sensor 4 , the light-sensing control module 10 obtains a calibrated optical image 41 based on the sensing signal.

[0154] In this embodiment, both the first and second optical paths are equivalent to the incident optical path. Therefore, the relative position of the light from the second optical path in the calibration optical image 41 can reflect the relative position of the light from the first optical path in the detection image 31 of the absolute spectrum acquisition module 3. The optical image displayed by the image sensor 4 based on the light from the second optical path can reflect the content of the light from the first optical path entering the absolute spectrum acquisition module 3. Because the first and second optical paths are consistent with respect to the incident optical path, the light from the first optical path does not approach the middle of the incident optical path, while the light from the second optical path approaches the edge of the incident optical path, thereby reducing optical errors.

[0155] In a test scenario of actual application, for example, when testing the brightness uniformity of a designated test position on an LED screen, the object to be tested is the test position on the LED screen. The light from the LED screen can be allowed to enter the light-input component 1 to form an incident light path. The image sensor connection part 16 is first moved to the function switching position 17 through the movable block 7, so that the light propagates along the second light path to the image sensor 4 to obtain the corresponding calibrated optical image 41. The relative position of the light of the second light path in the optical image is used to determine whether the deviation of the position of the light of the first light path in the detection screen 31 to the collection area 32 under the same state is within the allowable deviation range.

[0156] If so, it means that the light in the first optical path can reach the collection area 32, and the spectrum connection part 15 can be moved to the function switching position 17 through the movable block 7, so that the light propagates along the first optical path to the absolute spectrum collection module 3. The absolute spectrum collection module 3 collects data on the first optical path to obtain the absolute spectrum information of the object under test.

[0157] If not, the relative position between the light incident component 1 and the object to be measured can be adjusted until the relative position of the light of the second optical path in the optical image is within the specified area, so that under the same state, the deviation of the light of the first optical path from the position in the detection screen 31 to the acquisition area 32 is within the allowable deviation range, and then the spectrum connection part 15 is moved to the function switching position 17 through the movable block 7, so that the light propagates along the first optical path to the absolute spectrum acquisition module 3 to obtain the absolute spectrum information of the object to be measured.

[0158] It is understood that the technical solution in the second embodiment of the present application is to propagate the incident light path to different terminals without changing the incident angle of the incident light path or the light itself, so that light emitted from the same position can be propagated to the image sensor 4 and the absolute spectrum acquisition module 3 respectively. The optical imaging of the second light path in the image sensor 4 can determine whether the light of the object under test can accurately enter the absolute spectrum acquisition module 3 through the first light path, thereby enabling the absolute spectrum acquisition module 3 to accurately collect data on the object under test and reducing measurement errors.

[0159] Similarly, compared with the technical solutions in the background technology, the technical solution of the present application eliminates the setting of the eyepiece (close-up lens) and replaces the adjustment of the eyepiece for direct observation by the human eye, thereby reducing the error of human vision. At the same time, the light is vertically incident on the absolute spectrum acquisition module, thereby improving the measurement accuracy during absolute spectrum acquisition. Moreover, the first optical path and the second optical path are equivalent to the incident optical path and are consistent. Therefore, the optical image in the image sensor 4 can more accurately complete the content of the absolute spectrum acquisition module 3.

[0160] Reference Figure 16Regarding the specific structure of the light incident assembly 1, in this embodiment, the light incident assembly 1 includes a light incident bracket 11, a light incident lens 12, and a light transmitter 13. The light incident lens 12 is embedded and fixed to the housing 5, with one end of the light incident lens 12 exposed outside the housing 5 to receive light. The central axis of the light incident lens 12 is arranged in a horizontal direction.

[0161] The optical bracket is fixedly mounted on the housing 5 (refer to Figure 12 ), a receiving hole is opened at one end of the light incident bracket 11 toward the light incident lens 12, and the shape contour inside the receiving hole matches the shape contour of the light emitting end of the light incident lens 12, and the light emitting end of the light incident lens 12 is accommodated in the receiving hole.

[0162] Light transmitter 13 is generally tubular, with an optical channel formed within it. One end of light transmitter 13 is fixedly connected to light-incoming bracket 11. The optical channel communicates with the receiving hole, and the central axis of light-incoming lens 12 and the central axis of the optical channel are collinear, allowing light entering light-incoming lens 12 from outside housing 5 to enter the optical channel.

[0163] In this embodiment, the end of the light transmitter 13, remote from the light-input bracket 11, forms the end of the optical channel. A function switch 17 is formed in the space in front of this end. Light enters and passes through the optical channel, forming an incident light path. The incident light path propagates along the central axis of the optical channel and passes through function switch 17.

[0164] Regarding the specific working method of the movable block 7, in this embodiment, the movable block 7 is rotatably disposed on the light incident assembly 1. The movable block 7 is located on one side of the function switching position 17, and the movable block 7 can rotate to pass through the function switching position 17. In some feasible embodiments, the movable block 7 can also be slidably disposed on the light incident assembly 1, so that the movable block 7 can slide to pass through the function switching position 17.

[0165] Reference Figure 16 and Figure 17 In this embodiment, the spectrum connection portion 15 and the image sensor connection portion 16 are not only relatively fixedly arranged at different positions on the movable block 7, but also distributed in intervals around the rotation axis of the movable block 7, so that the movable block 7 drives the spectrum connection portion 15 and the image sensor connection portion 16 to move synchronously, and the movement trajectory of the spectrum connection portion 15 and the movement trajectory of the image sensor connection portion 16 can both pass through the function switching position 17.

[0166] Regarding the specific configuration between the spectrum connection portion 15 and the absolute spectrum acquisition module 3, in this embodiment, the central axis of the acquisition input terminal of the absolute spectrum acquisition module 3 is parallel or collinear with the central axis of the optical transmitter 13. Spacing is provided between the acquisition input terminal and the optical transmitter 13 to allow for the movement of the movable block 7 and its associated components. The spectrum connection portion 15 is a through-hole structure provided in the movable block 7. A fiber optic connector is used to transmit light between the spectrum connection portion 15 and the acquisition input terminal.

[0167] The end of the fiber optic connector near the acquisition input has a flexible portion that bends when the spectrum connection unit 15 moves. When the spectrum connection unit 15 moves to the function switching position 17, light in the optical channel can enter the fiber optic connector through the spectrum connection unit 15 and then be transmitted to the absolute spectrum acquisition module 3. This makes the light propagation process more stable and prevents the risk of light propagating to the absolute spectrum acquisition module 3 even when the spectrum connection unit 15 is away from the function switching position 17.

[0168] Regarding the specific arrangement between the image sensor connection portion 16 and the image sensor 4, in this embodiment, the image sensor connection portion 16 is a through-hole structure provided in the movable block 7, and the central axis of the image sensor connection portion 16 is parallel to the rotation axis of the movable block 7. In this embodiment, when the image sensor connection portion 16 is in the function switching position 17 and aligned with the light transmitter 13, the central axis of the image sensor connection portion 16 is collinear with the central axis of the optical channel.

[0169] Image sensor 4 is soldered to a control circuit board, which is fixedly mounted on the end of image sensor connection portion 16 away from light transmitter 13, shielding image sensor connection portion 16 from the end face of this end. Supported by the control circuit board, image sensor 4 is fixedly positioned within image sensor connection portion 16, with the photosensitive surface of image sensor 4 passing through the central axis of image sensor connection portion 16. In this embodiment, the center point of the photosensitive surface of image sensor 4 passes through the central axis of image sensor connection portion 16.

[0170] Reference Figure 17 and Figure 18Regarding the specific drive mechanism of movable block 7, in this embodiment, the absolute spectrum acquisition system further includes a drive assembly 8, which is a motor-driven structure. Drive assembly 8 includes a first drive motor, the body of which is fixed within housing 5. The output shaft of the first drive motor is connected to movable block 7 via a rotation hole, forming a hinge axis that enables rotational connection between movable block 7 and housing 5. The first drive motor operates by receiving electrical signals from the control module of the device system and, based on these signals, driving movable block 7 to rotate in a specified direction, thereby moving spectral connection portion 15 or image sensor connection portion 16 to the function switching position 17.

[0171] In some feasible embodiments, the driving component 8 can also adopt an electromagnet component, an electrode gear rack driving component 8, a screw motor driving component 8 and other electronic control components, which can be specifically set according to the movement mode (rotation or sliding) of the sliding block, as long as it can achieve the function of driving the movable block 7 to move to the specified position under the control of the electrical signal.

[0172] To detect whether the spectral connection portion 15 or the image sensor connection portion 16 has accurately reached the function switching position 17, in one embodiment, the drive assembly 8 is electrically connected to contact switches. The number and position of the contact switches are set according to the range of movement of the movable block 7. The contact switches use mechanical contact with the movable block 7 to feedback electrical signals to detect whether the movable block 7 has rotated to the corresponding position. In one embodiment, the first drive motor can also be an encoder motor with an encoder. Magnetic encoder motors have the advantage of controllable output shaft rotation, allowing the first drive motor to precisely control the output shaft's rotation angle, ensuring stable rotation of the movable block 7 to the corresponding position.

[0173] In this embodiment, an absolute spectrum acquisition method is provided. This absolute spectrum acquisition method corresponds to the various functional components in the absolute spectrum acquisition system in the above embodiment, including the light input component 1, the movable block 7, the spectrum connection part 15, the absolute spectrum acquisition module 3, the image sensor connection part 16, the image sensor 4, the driving component 8, etc.

[0174] The absolute spectrum acquisition method includes the following steps:

[0175] Reference Figure 19 and Figure 20 , S501, obtain the light of the incident light path in the optical channel.

[0176] Among them, the light incident component 1 is provided with an optical channel, and the light emitted by the object to be measured enters the optical channel to form an incident light path. A function switching position 17 is provided at the end of the optical channel. After passing through the function switching position 17, the incident light path can be switched to the first light path or the second light path.

[0177] S502 , causing the light passing through the function switching position 17 to propagate along the second optical path to the image sensor 4 .

[0178] Reference Figure 17 and Figure 20 , wherein the driving component 8 drives the movable block 7 to move, and the movable block 7 drives the image sensor connecting part 16 to move to the function switching position 17, so that the incident light path switches to the second light path after passing through the function switching position 17, so that the light passing through the function switching position 17 propagates along the second light path to the image sensor 4.

[0179] When the light propagates to the image sensor 4, the light falls on the photosensitive surface of the image sensor 4. The image sensor 4 uses the photoelectric conversion function to convert the light image on the photosensitive surface into an electrical signal that is proportional to the light image, thereby outputting a sensing signal based on the light received in the second optical path.

[0180] Specifically, based on the received sensor transmission instruction, the driving component 8 drives the movable block 7 to move to a specified position, thereby moving the image sensor connection portion 16 to the function switching position 17. The function switching instruction can be output by an operator through operation of a control terminal communicating with the system or a touch screen of the system.

[0181] S503 : Obtain a calibrated optical image 41 based on the sensing signal of the image sensor 4 .

[0182] The light sensing control module 10 obtains the calibration optical image 41 based on the sensing signal of the image sensor 4. The position of the light of the second optical path in the calibration optical image 41 can reflect the position of the light of the first optical path in the detection image 31 of the absolute spectrum acquisition module 3.

[0183] In this embodiment, the display screen 51 displays the calibrated optical image 41 of the light sensing control module 10 in real time, allowing the operator to observe the calibrated optical image 41 corresponding to the second optical path.

[0184] In a test scenario of actual application, for example, when testing the brightness uniformity of a designated test position on an LED screen, the object to be tested is the test position on the LED screen. The light of the LED screen can be propagated to the image sensor 4 along the second optical path to obtain a corresponding calibrated optical image 41. The relative position of the light of the second optical path in the optical image is used to determine whether the deviation of the position of the light of the first optical path in the detection screen 31 to the collection area 32 under the same state is within the allowable deviation range. If so, it means that the light emitted by the object to be tested can reach the collection area 32 in the first optical path, and step S504 can be executed.

[0185] If not, the relative position between the light incident component 1 and the object to be measured can be adjusted until the relative position of the light emitted by the object to be measured in the optical image is within the specified area range, so that under the same state, the deviation of the position of the light of the first optical path in the detection image 31 to the collection area 32 is within the allowable deviation range, and then step S504 is executed.

[0186] S504 , causing the light passing through the function switching position 17 to propagate along the first optical path to the absolute spectrum acquisition module 3 .

[0187] Drive assembly 8 drives movable block 7 to move, which in turn drives spectrum connection unit 15 to function switch position 17. This causes the incident light path to switch to the first light path after passing through function switch position 17. Light passing through function switch position 17 propagates along the first light path to absolute spectrum acquisition module 3. Absolute spectrum acquisition module 3 acquires data from the first light path to obtain absolute spectrum information of the object being measured.

[0188] Specifically, the driving component 8 drives the movable block 7 to move to a specified position based on the received spectrum transmission instruction, thereby moving the spectrum connection part 15 to the function switching position 17. The function switching instruction can be output by an operator through operation of a control terminal communicating with the system or a touch screen of the system.

[0189] Reference Figure 20 and Figure 21 Corresponding to the above-mentioned steps S502, S503, and S504, the absolute spectrum acquisition system further includes a photosensitivity control module 10, a sensor switching module 60, and a spectrum switching module 70. The functional modules are described in detail as follows:

[0190] The light sensing control module 10 is configured to obtain a calibrated optical image 41 based on the sensing signal of the image sensor 4 .

[0191] The sensing switching module 60 is used to output a sensing transmission instruction to the driving component 8 so that the driving component 8 drives the movable block 7 to move to a specified position, thereby moving the image sensor connecting portion 16 to the function switching position 17 .

[0192] The spectrum switching module 70 is used to output a spectrum transmission instruction to the driving component 8 so that the driving component 8 drives the movable block 7 to move to a specified position, thereby moving the spectrum connecting part 15 to the function switching position 17 .

[0193] The absolute spectrum acquisition system provided in the third embodiment also includes a control device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, steps S502, S503, and S504 of the absolute spectrum acquisition method of the first embodiment described above are implemented. Alternatively, when the processor executes the computer program, the functions of the photosensitivity control module 10, the sensor switching module 60, and the spectrum switching module 70 in the above embodiments are implemented.

[0194] The absolute spectrum acquisition method provided in this embodiment is implemented based on the various components of the absolute spectrum acquisition system in the above-mentioned embodiment three, and can achieve the same technical effects as the absolute spectrum acquisition system in embodiment three. The principle analysis can be found in the above-mentioned related description and will not be repeated here.

[0195] Example 4:

[0196] Reference Figure 20 and Figure 22 The absolute spectrum acquisition method of the embodiment of the present application differs from the absolute spectrum acquisition method of the first embodiment in that, after step S503 and before step S504, that is, after obtaining the calibrated optical image 41 based on the sensing signal of the image sensor 4 and before causing the light passing through the function switching position 17 to propagate along the first optical path to the absolute spectrum acquisition module 3, the method further includes the following steps:

[0197] S601. Obtain target position 42.

[0198] The target position 42 is used to reflect the relative position of the measured object in the calibration optical image 41 in real time.

[0199] When the light incident component 1 and the object to be measured move relative to each other, the position of the light emitted by the object to be measured relative to the light incident component 1 will change, causing the light composition in the incident light path to change, and the target position 42 will also move in real time.

[0200] S602: Determine the calibration area 43.

[0201] The calibration area 43 is used to reflect the relative position of the acquisition area 32 in the detection image 31 .

[0202] S603 , determining whether the target position 42 deviates from the calibration area 43 , and outputting offset adjustment information based on the offset from the target position 42 to the calibration area 43 according to the determination result.

[0203] Among them, the specific method for determining whether the target position 42 deviates from the calibration area 43 is: project the target position 42 and the calibration area 43 into the same coordinate system, first calculate the spacing distance from the target position 42 to the calibration area 43, and then determine whether this spacing distance is within the allowable deviation range.

[0204] If the distance between the target position 42 and the calibration area 43 is within the deviation range, the target position 42 is not deviated from the calibration area 43, indicating that in this state, the light emitted by the object under test can reach the collection area 32 after switching to the first optical path, and step S106 can be executed directly.

[0205] If the distance between the target position 42 and the calibration area 43 exceeds the deviation range, the target position 42 deviates from the calibration area 43, indicating that in this state, the light emitted by the object under test cannot reach the collection area 32 when switching to the first optical path. At this time, the offset adjustment information will be output according to the offset from the target position 42 to the calibration area 43.

[0206] S604 : Based on the offset adjustment information, drive the light incident component 1 to move.

[0207] Reference Figure 23 , wherein the mobile calibration module 50 drives the light incident component 1 to move to the specified position based on the deviation direction and offset distance in the offset adjustment information.

[0208] Reference Figure 23 and Figure 24 In this embodiment, the mobile calibration module 50 adopts a multi-axis robotic arm, and the housing 5 is fixedly connected to the movable end of the multi-axis robotic arm.

[0209] The absolute spectrum acquisition system of the embodiment of the present application differs from the absolute spectrum acquisition system of the first embodiment in that it further includes: a target positioning module 20, an initial calibration module 30, and a mobile calibration module 50. The functional modules are described in detail as follows:

[0210] The target positioning module 20 is used to obtain a target position 42 , wherein the target position 42 is used to reflect the relative position of the measured object in the calibration optical image 41 .

[0211] The initial calibration module 30 is used to determine a calibration area 43 , wherein the calibration area 43 is used to reflect the relative position of the acquisition area 32 in the detection image 31 .

[0212] The deviation calculation module 40 is used to determine whether the target position 42 deviates from the calibration area 43 , and output deviation adjustment information based on the deviation from the target position 42 to the calibration area 43 according to the determination result.

[0213] The movement calibration module 50 is used to drive the light incident component 1 to move based on the offset adjustment information.

[0214] In the absolute spectrum acquisition system provided in the fourth embodiment, the processor of the control device, when executing the computer program, further implements steps S601 through S603 of the absolute spectrum acquisition method of the first embodiment described above. Alternatively, the processor, when executing the computer program, further implements the functions of the target positioning module 20, the initial calibration module 30, and the deviation calculation module 40 of the aforementioned embodiment.

[0215] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An absolute spectrum acquisition method, characterized in that: include: Acquiring light of an incident light path in an optical channel, wherein the incident light path is formed by light emitted by the object to be measured entering the optical channel; dividing the incident light path into a first light path and a second light path; Propagate the light of the first optical path to the absolute spectrum acquisition module (3); Propagating the light of the second optical path to the image sensor (4); Based on the sensing signal of the image sensor (4), a calibration optical image (41) is obtained, wherein the position of the light of the second optical path in the calibration optical image (41) can reflect the position of the light of the first optical path in the detection image (31) of the absolute spectrum acquisition module (3); The absolute spectrum acquisition module (3) acquires data of light in an acquisition area (32) in the detection screen (31) to obtain absolute spectrum information of the object being measured; Before the absolute spectrum acquisition module (3) acquires data of light in the acquisition area (32) in the detection screen (31) to obtain absolute spectrum information of the object under test, the method further includes: Acquiring a target position (42), wherein the target position (42) is used to reflect the relative position of the measured object in the calibration optical image (41); Determining a calibration area (43), wherein the calibration area (43) is used to reflect the relative position of the acquisition area (32) in the detection image (31); It is determined whether the target position (42) deviates from the calibration area (43), and according to the determination result, the offset adjustment information is output based on the offset from the target position (42) to the calibration area (43).

2. The absolute spectrum acquisition method according to claim 1, characterized in that: Also includes: The mobile calibration module (50) drives the light incident component (1) to move based on the offset adjustment information, so that the target position (42) moves toward the calibration area (43).

3. An absolute spectrum acquisition system, characterized in that: include: The light incident component (1) is provided with an optical channel, and the light emitted by the object to be measured enters the optical channel to form an incident light path; A light splitting element (2) passes through the incident light path and is used to split the incident light path into a first light path and a second light path; A spectrum connection portion (15), arranged on the first optical path, for transmitting light of the first optical path to the absolute spectrum acquisition module (3); An image sensor connecting portion (16), arranged on the second optical path, for transmitting light of the second optical path to the image sensor (4); A photosensitive control module (10) is configured to obtain a calibration optical image (41) based on a sensing signal from the image sensor (4), wherein the position of the light of the second light path in the calibration optical image (41) can reflect the position of the light of the first light path in a detection image (31) of the absolute spectrum acquisition module (3); The absolute spectrum acquisition module (3) is used to acquire data of light in the acquisition area (32) in the detection screen (31) to obtain absolute spectrum information of the object being measured; Also includes: A target positioning module (20) is used to obtain a target position (42), wherein the target position (42) is used to reflect the relative position of the measured object in the calibration optical image (41); An initial calibration module (30) is used to determine a calibration area (43), wherein the calibration area (43) is used to reflect the relative position of the acquisition area (32) in the detection image (31); The deviation calculation module (40) is used to determine whether the target position (42) deviates from the calibration area (43), and outputs deviation adjustment information based on the deviation from the target position (42) to the calibration area (43) according to the determination result.

4. An absolute spectrum acquisition method, characterized in that: include: Obtaining light of an incident light path in an optical channel, wherein light emitted by a measured object enters the optical channel to form the incident light path, and a function switching position (17) is provided at the end of the optical channel, and the incident light path can be switched to a first light path or a second light path after passing through the function switching position (17); causing the light passing through the function switching position (17) to propagate along the second light path to the image sensor (4); Obtaining a calibrated optical image (41) based on a sensing signal of the image sensor (4); causing the light passing through the function switching position (17) to propagate along the first optical path to the absolute spectrum acquisition module (3); The position of the light of the second light path in the calibration optical image (41) can reflect the position of the light of the first light path in the detection image (31) of the absolute spectrum acquisition module (3); The absolute spectrum acquisition module (3) acquires data of light in an acquisition area (32) in the detection screen (31) to obtain absolute spectrum information of the object being measured; Before the step of causing the light passing through the function switching position (17) to propagate along the first optical path to the absolute spectrum acquisition module (3), the method further includes: Acquiring a target position (42), wherein the target position (42) is used to reflect the relative position of the measured object in the calibration optical image (41); Determining a calibration area (43), wherein the calibration area (43) is used to reflect the relative position of the acquisition area (32) in the detection image (31); Determining whether the target position (42) deviates from the calibration area (43), and outputting offset adjustment information based on the offset from the target position (42) to the calibration area (43); The mobile calibration module (50) drives the light incident component (1) to move based on the offset adjustment information, so that the target position (42) moves toward the calibration area (43).

5. The absolute spectrum acquisition method according to claim 4, characterized in that: The function switching position (17) is provided with a spectrum connection part (15), an image sensor connection part (16) and a movable block (7), wherein the spectrum connection part (15) corresponds to the first optical path, the image sensor connection part (16) corresponds to the second optical path, and the movable block (7) is used to drive the spectrum connection part (15) or the image sensor connection part (16) to move to the function switching position (17); the step of causing the light passing through the function switching position (17) to propagate along the second optical path to the image sensor (4) comprises: The movable block (7) drives the image sensor connecting portion (16) to move to the function switching position (17), so that the incident light path switches to the second light path after passing through the function switching position (17), so that the light passing through the function switching position (17) propagates along the second light path to the image sensor (4); The step of causing the light passing through the function switching position (17) to propagate along the first optical path to the absolute spectrum acquisition module (3) comprises: The movable block (7) drives the spectrum connection part (15) to move to the function switching position (17), so that the incident light path switches to the first light path after passing through the function switching position (17), so that the light passing through the function switching position (17) propagates along the first light path to the absolute spectrum acquisition module (3).

6. An absolute spectrum acquisition system, characterized in that: include: A light input component (1) is provided with an optical channel for acquiring light from the optical channel, wherein light emitted by the object to be measured enters the optical channel to form an incident light path, and a function switching position (17) is provided at the end of the optical channel, and the incident light path can be switched to a first light path or a second light path after passing through the function switching position (17); A movable block (7) movably arranged on the light incident component (1); an image sensor connecting portion (16), arranged in an area where the movable block (7) can pass through the function switching position (17), and configured to switch the incident light path to the second light path after passing through the function switching position (17), so that light passing through the function switching position (17) propagates along the second light path to the image sensor (4); A photosensitive control module (10) for obtaining a calibrated optical image (41) based on a sensing signal from the image sensor (4); a spectrum connection portion (15), arranged in an area where the movable block (7) can pass through the function switching position (17), and configured to switch the incident light path to the first light path after passing through the function switching position (17), so that the light passing through the function switching position (17) propagates along the first light path to the absolute spectrum acquisition module (3); The position of the light of the second light path in the calibration optical image (41) can reflect the position of the light of the first light path in the detection image (31) of the absolute spectrum acquisition module (3); A spectrum connection portion (15) is provided in an area where the movable block (7) can pass through the function switching position (17), so that light passing through the function switching position (17) is transmitted to the absolute spectrum acquisition module (3); The absolute spectrum acquisition module (3) is used to acquire data of light in the acquisition area (32) in the detection screen (31) to obtain absolute spectrum information of the object being measured; The absolute spectrum acquisition system further includes: A target positioning module (20) is used to obtain a target position (42), wherein the target position (42) is used to reflect the relative position of the measured object in the calibration optical image (41); An initial calibration module (30) is used to determine a calibration area (43), wherein the calibration area (43) is used to reflect the relative position of the acquisition area (32) in the detection image (31); a deviation calculation module (40) for determining whether the target position (42) deviates from the calibration area (43), and outputting deviation adjustment information based on the deviation from the target position (42) to the calibration area (43) according to the determination result; A mobile calibration module (50) is used to drive the light incident component (1) to move based on the offset adjustment information, so as to move the target position (42) toward the calibration area (43).

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