Color analyzer

Abstract

The utility model discloses a color analyzer which is used for filtering stray light entering a detection path and improving the accuracy of a measurement result. The analyzer comprises a lens, an analyzer main body and a cut-off filter, the lens is connected with the analyzer main body, and the analyzer main body is used for detecting a light beam transmitted from the lens; a beam splitting assembly, a light filtering assembly and an analysis module are sequentially arranged in the analyzer body in the light beam transmission direction, and three light filtering positions are arranged in the analyzer body. The three light filtering positions are located between the lens and the beam splitting assembly, between the beam splitting assembly and the light filtering assembly and between the light filtering assembly and the analysis module respectively, and the cut-off light filter is arranged at any light filtering position or arranged in the lens. When the light beam penetrates through the cut-off filter, stray light in the light beam is filtered out by the cut-off filter, and the stray light is one or more kinds of invisible light.

Description

Technical Field

[0001] The present application relates to the technical field of optical detection equipment, and in particular to a color analyzer. Background Art

[0002] As displays transition from traditional LCDs to OLEDs, which offer enhanced color expression, higher standards are being placed on measuring screen color accuracy and brightness. A color analyzer is a key tool for testing OLED screen performance. It typically uses photoelectric conversion elements within its analysis module to capture and analyze light signals emitted by the screen, converting them into electrical signals. After processing them through complex algorithms, it ultimately calculates precise chromaticity values ​​to assess whether the screen's color meets established quality standards.

[0003] Existing color analyzers usually only have a filter component, which uses the filter component to separate the measured light beam into red light, green light, and blue light, thereby facilitating the subsequent analysis of the three colors of light by the analysis module. The function of the filter component is only to filter the light beam and retain light of a specific color. However, during the actual test process, some stray light that may come from scattering of the light source, interference from ambient light, or reflection inside the instrument will follow the light beam to the analysis module. The filter component cannot filter out the stray light. Stray light will interfere with the accuracy of color analysis, causing the photoelectric conversion elements in the analysis module to produce unnecessary responses, thereby introducing errors in the calculation of chromaticity values, affecting the accuracy and reliability of the measurement results. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a color analyzer for filtering out stray light entering the detection path and improving the accuracy of measurement results.

[0005] The present application provides a color analyzer, comprising:

[0006] A lens, an analyzer body, and a cutoff filter, wherein the lens is connected to the analyzer body, and the analyzer body is used to detect the light beam transmitted from the lens;

[0007] A beam splitting component, a filtering component and an analysis module are sequentially arranged in the analyzer body along the light beam transmission direction. Three filtering positions are arranged in the analyzer body, and the three filtering positions are respectively located between the lens and the beam splitting component, between the beam splitting component and the filtering component, and between the filtering component and the analysis module. The cutoff filter is arranged at any filtering position, or is arranged in the lens, so that when the light beam passes through the cutoff filter, the cutoff filter filters out the stray light in the light beam, and the stray light is one or more types of non-visible light.

[0008] Optionally, three placement holes are provided on the outer shell of the analyzer body, and the three placement holes are aligned with the three filter positions respectively, so that the cutoff filter is placed in the filter position along the placement holes.

[0009] Optionally, a cover plate is provided on each of the three placement holes, the cover plate is connected to the shell and fits with the placement hole, and the cover plate is used to cover the placement hole.

[0010] Optionally, three filter positions are respectively provided with fixing parts, the fixing parts are connected to the analyzer body, and the fixing parts are provided with card slots for clamping the cutoff filter.

[0011] Optionally, the cutoff filter is arranged at any one of the filtering positions in the analyzer body, a driving component is provided in the analyzer body, the cutoff filter is made of soft material, the cutoff filter is fixed on the driving component, and the driving component is used to control the movement of the cutoff filter at the three filtering positions.

[0012] Optionally, the driving assembly includes a conveyor belt, a first knob, a second knob, a first pulley and a second pulley;

[0013] The first knob and the first pulley are fixed to one side of the beam transmission path in the analyzer body, and the second knob and the second pulley are fixed to the other side of the beam transmission path;

[0014] One end of the conveyor belt is fixed to the first knob, and the other end of the conveyor belt extends and passes through the first pulley and the second pulley and is connected to the second knob;

[0015] The cutoff filter is fixed on the conveyor belt, and the first knob and the second knob cooperate to control the movement of the cutoff filter among the three filtering positions.

[0016] Optionally, both ends of the first pulley and both ends of the second pulley are respectively provided with raised extensions, and the extensions are in contact with the edge of the conveyor belt.

[0017] Optionally, the drive assembly further includes a first motor and a second motor, the first motor is connected to the first knob, the second motor is connected to the second knob, the first motor is used to control the rotation of the first knob, and the second motor is used to control the rotation of the second knob.

[0018] Optionally, a lens assembly and an aperture are sequentially arranged in the lens along the direction of light beam transmission. When the cut-off filter is located in the lens, the cut-off filter is arranged between the aperture and the lens assembly; or the cut-off filter is arranged between the aperture and the cross section of the light beam output end of the lens.

[0019] Optionally, the cutoff filter is a near-infrared cutoff filter;

[0020] or,

[0021] The cut-off filter is made of electrochromic material.

[0022] It can be seen from the above technical solutions that this application has the following advantages:

[0023] By connecting the lens to the analyzer body, a beam splitter component, a filter component and an analysis module are sequentially arranged in the analyzer body along the light beam transmission direction, and three filter positions are set in the analyzer body, which are respectively located between the lens and the beam splitter component, between the beam splitter component and the filter component, and between the filter component and the analysis module. A cutoff filter is set at any filter position, or is set in the lens. Before the light beam reaches the analysis module, it first passes through the cutoff filter. The cutoff filter filters out stray light contained in the light beam. The stray light is one or more types of non-visible light, thereby effectively filtering out stray light from ambient light or the light source itself during the transmission process, thereby improving the accuracy of the color analyzer in measuring chromaticity values, reducing the influence of stray light on the measurement results, improving the measurement accuracy, and improving the test accuracy of the color analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of an embodiment of a color analyzer provided by the present application;

[0025] Figure 2 A schematic diagram of another embodiment of a color analyzer provided by the present application;

[0026] Figure 3 A schematic diagram of another embodiment of a color analyzer provided by the present application;

[0027] Figure 4 A schematic diagram of placing holes in a color analyzer provided in the present application;

[0028] Figure 5 A schematic diagram of the cooperation between the cover plate and the placement hole in a color analyzer provided in the present application;

[0029] Figure 6 A schematic diagram of a fixing member in a color analyzer provided in the present application;

[0030] Figure 7 A schematic diagram of another embodiment of a color analyzer provided by the present application;

[0031] Figure 8 A schematic diagram of an extension portion of a color analyzer provided in the present application;

[0032] Figure 9 This is a schematic diagram of the cooperation between a first knob and a first motor in a color analyzer of the present application;

[0033] Figure 10 A schematic diagram of a lens in a color analyzer of the present application;

[0034] Among them, the lens 1, the beam splitter assembly 2, the filter assembly 3, the analysis module 4, the analyzer body 5, the cutoff filter 6, the placement hole 51, the cover 52, the fixing part 53, the card slot 54, the shell 55, the conveyor belt 551, the first knob 552, the first rotating shaft 5521, the first knob body 5522, the second knob 553, the first pulley 554, the second pulley 555, the extension part 556, the first motor 557, the lens assembly 57, the aperture 58, and the protective lens 59. DETAILED DESCRIPTION

[0035] In order to solve the above technical problems, the present application provides a color analyzer for effectively filtering out stray light entering the detection path and improving the accuracy of measurement results.

[0036] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only used to illustrate the relative position relationship between the various components or components, and do not particularly limit the specific installation orientation of the various components or components.

[0037] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0038] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0039] In addition, the structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0040] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the embodiments described are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] The present application provides a color analyzer for effectively filtering out stray light entering a detection path and improving the accuracy of measurement results. The specific implementation process of the present application is described below.

[0042] See also Figures 1 to 10 , an embodiment of the present application provides a color analyzer, comprising:

[0043] A lens 1, an analyzer body 5 and a cutoff filter 6, the lens 1 is connected to the analyzer body 5, and the analyzer body 5 is used to detect the light beam transmitted from the lens 1; a beam splitter component 2, a filter component 3 and an analysis module 4 are sequentially arranged in the analyzer body 5 along the light beam transmission direction, and three filter positions are arranged in the analyzer body 5, which are respectively located between the lens 1 and the beam splitter component 2, between the beam splitter component 2 and the filter component 3, and between the filter component 3 and the analysis module 4. The cutoff filter 6 is set at any filter position, or is set in the lens 1, so that when the light beam passes through the cutoff filter 6, the cutoff filter 6 filters out stray light in the light beam, and the stray light is one or more types of non-visible light.

[0044] Lens 1 captures light (beam) reflected or emitted from the surface of the test panel, focusing it and directing it into the analyzer body 5, ensuring that the light can enter the subsequent testing process. Lens 1 and analyzer body 5 are detachably connected, such as by a snap-fit ​​or threaded connection, to facilitate replacement of lens 1.

[0045] The beam splitter assembly 2 is located inside the analyzer body 5 and behind the lens 1. It transmits the light captured by the lens 1 to the subsequent filter assembly 3 and analysis module 4 without loss. The beam splitter assembly 2 has excellent light transmission performance, can maintain the intensity and directionality of the light, and reduce the loss and distortion of the light during transmission. The beam splitter assembly 2 can determine the number of beam splits based on the amount of filtering required by the filter assembly 3. For example, if the filter assembly 3 has three different filters (red, green, and blue), the beam splitter assembly 2 needs to divide the three beams of light into three different filters.

[0046] The beam splitting component 2 can be a transmission optical fiber, or can be a grating, a prism, or a beam splitter. The grating and the prism can split the light beam according to different wavelengths.

[0047] The filter assembly 3 includes several different filters, such as two filters of different colors arranged side by side, or three filters of different colors arranged side by side, or four filters of different colors arranged side by side, etc. The specific number of filters in the filter assembly 3 is set according to actual needs and is not specifically limited here.

[0048] In one feasible embodiment, the filter assembly 3 is composed of three filters of red, green and blue colors, namely a red filter, a green filter and a blue filter, which are used to decompose the transmitted white light into three basic color components of red, green and blue. Specifically, after the light beam passes through the red filter, red light remains. Similarly, after the light beam passes through the other two filters, green light and blue light remain.

[0049] Analysis module 4 receives the red, green, and blue light signals decomposed by filter assembly 3 and converts them into electrical signals via a photoelectric conversion device (such as a photodiode). Analysis module 4 then amplifies, filters, and performs analog-to-digital conversion on the electrical signals, ultimately calculating the color parameters of the surface of the object being measured (such as RGB values, hue, saturation, and brightness).

[0050] The cut-off filter 6 can reduce or eliminate stray light in the light beam through its own specific spectral transmission characteristics (the ability to transmit or block light of different wavelengths), thereby improving the accuracy and stability of color analysis.

[0051] Stray light is one or more types of non-visible light, including but not limited to ultraviolet light (wavelength range between 100 nanometers and 400 nanometers), infrared light, X-rays (wavelength range between 0.01 nanometers and 10 nanometers) and gamma rays (wavelength less than 0.001 nanometers), among which infrared light includes near infrared light (wavelength range between 0.75 microns and 2.5 microns), mid infrared light (wavelength range between 2.5 microns and 25 microns) and far infrared light (wavelength range between 25 microns and 500 microns).

[0052] When a single stray light needs to be filtered out, corresponding stray light cutoff filters can be set at three filtering positions or in the lens. For example, when the stray light is ultraviolet light, an ultraviolet filter is set to filter out ultraviolet light with a wavelength range of 100 nanometers to 400 nanometers in the light beam to avoid the influence of ultraviolet light on the test results; when multiple stray lights need to be filtered out, multiple different cutoff filters can be set for filtering. Multiple filters can be set at the same filtering position at the same time, or they can be set separately at multiple filtering positions. For example, if the stray light is ultraviolet light and X-rays, an ultraviolet filter and an X-ray filter can be set at the same time to filter out ultraviolet light and X-rays in the light beam at the same time.

[0053] The three filter positions are reserved within the analyzer body 5 for the placement of cutoff filters 6. The cutoff filter 6, positioned between the lens 1 and the beam splitter assembly 2, provides preliminary screening or adjustment of the optical signal entering the beam splitter assembly 2. The cutoff filter 6, positioned between the beam splitter assembly 2 and the filter assembly 3, purifies or adjusts the optical signal transmitted to the filter assembly 3. The filter, positioned between the filter assembly 3 and the analysis module 4, ensures that only optical signals of specific wavelengths enter the analysis module 4, thereby improving signal quality and accuracy.

[0054] Cutoff filter 6 can be placed in any of the three filter positions described above. The choice of placement depends on the specific requirements and design goals of the color analyzer. For example, if the optical signal collected by lens 1 contains a large amount of stray light, then installing cutoff filter 6 between lens 1 and beam splitter 2 may be more effective. If the optical signal generated after filter assembly 3 still contains stray light interference, then installing it between filter assembly 3 and analysis module 4 may be more appropriate.

[0055] In addition, the cutoff filter 6 may be arranged inside the lens 1 to filter out stray light from the light beam inside the lens 1 before the light beam enters the analyzer body 5 .

[0056] In this embodiment, by connecting the lens to the analyzer body, a beam splitter component, a filter component and an analysis module are sequentially arranged in the analyzer body along the light beam transmission direction, and three filter positions are set in the analyzer body, which are respectively located between the lens and the beam splitter component, between the beam splitter component and the filter component, and between the filter component and the analysis module. The cutoff filter is set at any filter position, or is set in the lens. Before the light beam reaches the analysis module, it first passes through the cutoff filter. The cutoff filter filters out the stray light contained in the light beam. The stray light is one or more types of non-visible light, so that the stray light from the ambient light or the light source itself during the transmission process can be effectively filtered out, thereby improving the accuracy of the color analyzer in measuring the chromaticity value, reducing the influence of stray light on the measurement results, improving the measurement accuracy, and improving the test accuracy of the color analyzer.

[0057] Please see further Figure 4 In an optional embodiment, three placement holes 51 are provided on the outer shell of the analyzer body 5 , and the three placement holes 51 are aligned with the three filter positions respectively, so that the cutoff filter 6 is placed in the filter position along the placement holes 51 .

[0058] Three placement holes 51 are designed on the outer shell (side or top) of the analyzer main body 5. The placement holes 51 pass through the outer shell of the analyzer main body 5. The three placement holes 51 are respectively aligned with the three filter positions inside the analyzer main body 5, so that the cutoff filter 6 can be placed into the analyzer main body 5 through this placement hole 5.

[0059] The cutoff filter 6 is detachably connected in the analyzer body 5 , and thus the cutoff filter can be installed and removed, and its position can be changed, through the placement hole 51 .

[0060] Please see further Figure 5 In this optional embodiment, a cover plate 52 is respectively provided on the three placement holes 51 . The cover plate 52 is connected to the shell 55 and fits with the placement holes 51 . The cover plate 52 is used to cover the placement holes 51 .

[0061] In this embodiment, to prevent external dust, impurities, and moisture from entering the analyzer body 5 through the placement holes 51, a cover plate 52 is provided over each placement hole 51. The cover plate 52 is a separate small component that conforms to the shape and size of the placement hole 51. The cover plate 52 is securely connected to the housing by means of, for example, snaps, screws, or magnets.

[0062] When not in use or when the cutoff filter 6 has been installed, the three cover plates 52 are respectively placed on the corresponding three placement holes 51. When the cutoff filter 6 needs to be installed or removed, the corresponding cover plate 52 is opened to operate the cutoff filter 6. After the operation is completed, the cover plate 52 is continued to be closed.

[0063] When the cover 52 is closed, the cover 52 can tightly cover the placement hole 51 without leaving any gaps or voids, thereby not only effectively blocking the placement hole 51 and protecting the filter or other optical components in the placement hole 51 from the influence of the external environment, but also preventing external substances such as dust and impurities from entering the interior of the analyzer.

[0064] Please see further Figure 6 In this optional embodiment, fixing members 53 are respectively provided at the three filtering positions, and the fixing members 53 are connected to the analyzer body 5 . A card slot 54 is provided on the fixing member 53 , and the card slot 54 is used to clamp the cutoff filter 6 .

[0065] The fixing part 53 is used to fix the cutoff filter 6 in the analyzer body 5. The fixing part 53 is fixed to the inside of the analyzer body 5 by means of screws, snaps, welding, etc. to ensure that the filter does not loosen or fall off during use. A card slot 54 is designed on the fixing part 53, and the card slot 54 is used to clamp the cutoff filter 6. The shape and size of the card slot 54 match the cutoff filter 6 to ensure that the filter can be easily and accurately inserted and fixed in the card slot 54. When the cutoff filter 6 is placed in the card slot 54, the two sides of the card slot 54 will tightly clamp the filter, thereby firmly fixing the cutoff filter 6 in the filtering position.

[0066] It should be noted that the clamping groove 54 is used to fix the edge of the cut-off filter 6 and does not limit the light transmittance of the main filtering position of the cut-off filter 6 .

[0067] In an optional embodiment, the cutoff filter 6 is set at any filtering position in the analyzer body 5, a driving component is provided in the analyzer body 5, the cutoff filter 6 is made of soft material, the cutoff filter 6 is fixed on the driving component, and the driving component is used to control the cutoff filter 6 to move at three filtering positions.

[0068] The drive assembly is responsible for controlling the movement of the cutoff filter 6 between three filter positions to meet the color analyzer's requirements for optical component position adjustment. The cutoff filter 6 is fixed to the drive assembly to ensure that it will not fall off or shift due to vibration or impact during movement.

[0069] When the drive assembly controls the cutoff filter 6 to move, it moves along a predetermined trajectory, which passes through the three filter positions in sequence. When the cutoff filter 6 moves to the desired filter position, the drive assembly controls the cutoff filter 6 to stop moving. The specific structure of the drive assembly is described as follows:

[0070] Please see further Figure 7In an optional embodiment, the drive assembly includes a conveyor belt 551, a first knob 552, a second knob 553, a first pulley 554, and a second pulley 555; the first knob 552 and the first pulley 554 are fixed to one side of the light beam transmission path within the analyzer body 5, and the second knob 553 and the second pulley 555 are fixed to the other side of the light beam transmission path; the first knob 552 and the second knob 553 are partially located inside the analyzer body 5, and partially located outside the analyzer body. One end of the conveyor belt 551 is fixed to the first knob 552, and the other end of the conveyor belt 551 extends and wraps around the first pulley 554 and the second pulley 555, and then connects to the second knob 553; the cutoff filter 6 is fixed to the conveyor belt 551, and the first knob 552 and the second knob 553 cooperate to control the movement of the cutoff filter 6 among three filtering positions.

[0071] The cutoff filter 6 is made of a soft material, which not only retains the effective filtering ability of stray light, but also can be bent and deformed at will and has the ability to restore to its original shape. Deformation does not affect the filtering ability; the light beam transmission path is the path that the light beam takes during the transmission from the lens 1 to the analysis module in the analyzer body.

[0072] Conveyor belt 551( Figure 7 The portion (marked in yellow in the middle) is made of a fully translucent material and does not filter the light beam. One end of the conveyor belt 551 is fixed to the first knob 552, while the other end passes through the first pulley 554 and the second pulley 555 before connecting to the second knob 553. This allows the conveyor belt 551 to reciprocate under the drive of the two knobs. The first knob 552 and the second knob 553 are respectively fixed on either side of the light beam transmission path, and their rotation drives the movement of the conveyor belt 551. The first pulley 554 and the second pulley 555 are respectively mounted on either side of the light beam transmission path. The conveyor belt 551 passes through the three filtering positions along the path formed by the first pulley 554 and the second pulley 555. Therefore, by controlling the movement of the conveyor belt 551, the filtering position of the stray light filter 6 can be changed.

[0073] For example, if the cutoff filter 6 is between the lens 1 and the beam splitter assembly 2, when the second knob 553 is rotated by an external force, the cutoff filter 6 moves along with the conveyor belt 551, passes the first pulley 554, and then arrives between the beam splitter assembly 2 and the filter assembly 3. After passing the second pulley 555, the cutoff filter 6 arrives between the filter assembly 3 and the analysis module 4. If the cutoff filter 6 moves in the opposite direction, it can be achieved by controlling the rotation of the first knob 552.

[0074] The conveyor belt 551 is always kept taut between the two knobs, and part of the conveyor belt 551 is wrapped around the first knob 552 or the second knob 553. Specifically, when the cutoff filter 6 is located between the lens 1 and the beam splitter assembly 2, part of the conveyor belt 551 is wrapped around the first knob 552, and at this time there is no wrapping around the second knob 553 (only a connection exists). On the contrary, when the cutoff filter 6 is located between the filter assembly 3 and the analysis module 4, part of the conveyor belt 551 is wrapped around the second knob 552, and at this time there is no wrapping around the first knob 553.

[0075] See also Figure 8 In an optional embodiment, both ends of the first pulley 554 and both ends of the second pulley 555 are respectively provided with raised extensions 556 , and the extensions 556 are in contact with the edge of the conveyor belt 551 .

[0076] The extension portion 556 serves to support the edge of the conveyor belt 551, so the main filtering position (middle position) of the cutoff filter 6 will not directly contact the first pulley 554 and the second pulley 555, thereby reducing the wear on the cutoff filter 6 and ensuring the filtering effect of the cutoff filter 6.

[0077] See also Figure 9 In an optional embodiment, the driving assembly further includes a first motor 557 and a second motor, the first motor 557 is connected to the first knob 552, and the second motor is connected to the second knob 553, the first motor 557 is used to control the rotation of the first knob 552, and the second motor is used to control the rotation of the second knob 553.

[0078] The first knob 552 includes a first rotating shaft 5521 and a first knob body 5522. The shaft of the first motor 557 is connected to the first rotating shaft, and the first motor 557 is connected to the first knob body 5522. The first motor can control the rotation of the first knob body 5522. Similarly, the second motor is connected and controlled in the same way.

[0079] In this embodiment, the first motor and the second motor are electrically connected to the internal analysis module respectively. By setting the first motor and the second motor, the movement of the conveyor belt can be automatically controlled, so that the position of the cutoff filter can be automatically adjusted according to demand.

[0080] In an optional embodiment, a lens assembly 57 and an aperture 58 are sequentially arranged in the lens 1 along the direction of light beam transmission. When the cut-off filter 6 is located in the lens 1, the cut-off filter 6 is arranged between the aperture 58 and the lens assembly 57; or the cut-off filter 6 is arranged between the aperture 58 and the cross section of the light beam output end of the lens.

[0081] The beam output end of the lens 1 is connected to the analyzer body 5 . When the cutoff filter 6 is arranged between the aperture 58 and the cross section of the beam output end of the lens, the cutoff filter 6 is located between the aperture 58 and the beam splitting component 2 .

[0082] In addition, a protective lens 59 (made of glass) is provided in the beam output end of the lens 1, and a cut-off filter 6 can also be provided between the aperture 58 and the protective lens 59. Figure 10 .

[0083] In an optional embodiment, the cut-off filter 6 is a near-infrared cut-off filter or is made of an electrochromic material. In this embodiment, the near-infrared cut-off filter can block the passage of near-infrared light, solve the influence of stray light, especially near-infrared wavelengths (wavelength range between 0.75 microns and 2.5 microns) on color coordinate measurement, and improve measurement accuracy. Specifically, after the light beam passes through the near-infrared cut-off filter, the infrared light will be absorbed or reflected, and light of other wavelengths in the light beam can pass smoothly. In addition, there are some near-infrared cut-off filters that use the interference effect of multilayer thin films to block infrared light. Electrochromic materials are a special class of materials whose optical properties (such as transmittance, reflectivity, absorptivity or emissivity) can undergo reversible changes under the action of an electric field, such as changes in material color or transparency. When this material is used as a cut-off filter 6, the cut-off filter 6 is electrically connected to the analysis module 4, and its transmittance or reflectivity to light can be changed by adjusting the voltage or current applied thereto, thereby effectively filtering out or reducing unwanted stray light.

[0084] Alternatively, the cutoff filter 6 can be made of a liquid crystal material. Liquid crystal material is a special material state between liquid and solid, possessing unique physical and chemical properties. Liquid crystal molecules undergo changes in their orientation under the action of an electric field, resulting in changes in the material's optical properties (such as refractive index and birefringence). When liquid crystal material is used as the cutoff filter 6, the light transmission path and intensity can be adjusted by controlling the direction and intensity of the electric field, thereby filtering out stray light.

[0085] It should be noted that the above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A color analyzer, characterized in that: include: A lens, an analyzer body, and a cutoff filter, wherein the lens is connected to the analyzer body, and the analyzer body is used to detect the light beam transmitted from the lens; A beam splitting component, a filtering component and an analysis module are sequentially arranged in the analyzer body along the light beam transmission direction. Three filtering positions are arranged in the analyzer body, and the three filtering positions are respectively located between the lens and the beam splitting component, between the beam splitting component and the filtering component, and between the filtering component and the analysis module. The cutoff filter is arranged at any filtering position, or is arranged in the lens, so that when the light beam passes through the cutoff filter, the cutoff filter filters out the stray light in the light beam, and the stray light is one or more types of non-visible light.

2. The color analyzer according to claim 1, wherein Three placement holes are provided on the outer shell of the analyzer body, and the three placement holes are aligned with the three filter positions respectively, so that the cut-off filter is placed in the filter position along the placement holes.

3. The color analyzer according to claim 2, wherein: The three placement holes are respectively provided with a cover plate, which is connected to the shell and fits with the placement hole, and is used to cover the placement hole.

4. The color analyzer according to claim 2 or 3, characterized in that The three filter positions are respectively provided with fixing parts, which are connected to the analyzer body. The fixing parts are provided with card slots, which are used to clamp the cut-off filter.

5. The color analyzer according to any one of claims 1 to 3, characterized in that The cutoff filter is arranged at any one of the filtering positions in the analyzer body. A driving component is provided in the analyzer body. The cutoff filter is made of soft material. The cutoff filter is fixed on the driving component. The driving component is used to control the movement of the cutoff filter at the three filtering positions.

6. The color analyzer according to claim 5, characterized in that The driving assembly includes a conveyor belt, a first knob, a second knob, a first pulley and a second pulley; The first knob and the first pulley are fixed to one side of the beam transmission path in the analyzer body, and the second knob and the second pulley are fixed to the other side of the beam transmission path; One end of the conveyor belt is fixed to the first knob, and the other end of the conveyor belt extends and passes through the first pulley and the second pulley and is connected to the second knob; The cutoff filter is fixed on the conveyor belt, and the first knob and the second knob cooperate to control the movement of the cutoff filter among the three filtering positions.

7. The color analyzer according to claim 6, wherein: Both ends of the first pulley and both ends of the second pulley are respectively provided with raised extension parts, and the extension parts are in contact with the edge of the conveyor belt.

8. The color analyzer according to claim 6, wherein: The driving assembly also includes a first motor and a second motor, the first motor is connected to the first knob, and the second motor is connected to the second knob. The first motor is used to control the rotation of the first knob, and the second motor is used to control the rotation of the second knob.

9. The color analyzer according to claim 1, wherein A lens assembly and an aperture are sequentially arranged in the lens along the direction of light beam conduction. When the cutoff filter is located in the lens, the cutoff filter is arranged between the aperture and the lens assembly; or the cutoff filter is arranged between the aperture and the cross section of the light beam output end of the lens.

10. The color analyzer according to claim 1 or 9, characterized in that: The cut-off filter is a near-infrared cut-off filter; or, The cut-off filter is made of electrochromic material.

Images