Color analyzer

Abstract

The invention 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 gradually transition from traditional LCDs to OLEDs with stronger color expression, higher requirements are placed on the measurement standards of screen color accuracy and brightness. Color analyzers are key tools for testing OLED screen performance. They usually use the photoelectric conversion elements in the analysis module to capture and analyze the light signals emitted by the screen, convert the light signals into electrical signals, and then process them through complex algorithms to finally calculate the precise chromaticity value to evaluate whether the screen color meets the established quality standards.

[0003] Existing color analyzers are usually only equipped with a filter component, which transforms the light beam to be measured into red light, green light and blue light respectively, so as to facilitate the subsequent analysis module to analyze the three colors of light. The function of the filter component is only to filter the light beam and retain the light of a specific color. In the actual test process, some stray light that may come from the scattering of the light source, the interference of ambient light or the reflection inside the instrument will follow the light beam to the analysis module. The filter component cannot filter out the stray light. The stray light will interfere with the accuracy of the color analysis, causing the photoelectric conversion element in the analysis module to produce unnecessary responses, thereby introducing errors in the calculation of the chromaticity value, affecting the accuracy and reliability of the measurement results. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a color analyzer for filtering out stray light entering a 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 cut-off 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 splitter component, a filter component and an analysis module are sequentially arranged in the analyzer body along the light beam transmission direction. Three filter positions are arranged in the analyzer body, and the three filter positions 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 arranged at any filter 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 respectively aligned with the three filter positions, so that the cutoff filter is placed in the filter position along the placement holes.

[0009] Optionally, a cover plate is respectively provided on 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, fixing parts are respectively provided at the three filtering positions, 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 arranged 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 on the first knob, and the other end of the conveyor belt extends and is connected to the second knob after being wound around the first pulley and the second pulley;

[0015] The cut-off filter is fixed on the conveyor belt, and the first knob cooperates with the second knob to control the movement of the cut-off filter in the three filtering positions.

[0016] Optionally, 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.

[0017] Optionally, the driving 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 light beam transmission direction. 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] The lens is connected 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 arranged in the analyzer body, the three filter positions 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 arranged at any filter position or 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, 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 result, 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 part in a color analyzer provided in the present application;

[0030] Figure 7 A schematic diagram of the cooperation between a fixing member, a sliding rod and a cover plate in a color analyzer provided in the present application;

[0031] Figure 8 A schematic diagram of another embodiment of a color analyzer provided by the present application;

[0032] Fig. 9 A schematic diagram of an extension part in a color analyzer provided in the present application;

[0033] Fig.10 A schematic diagram of the cooperation between a first knob and a first motor in a color analyzer of the present application;

[0034] Fig.11 A schematic diagram of a lens in a color analyzer of the present application;

[0035] Among them, there are lens 1, beam splitter assembly 2, filter assembly 3, analysis module 4, analyzer body 5, cutoff filter 6, placement hole 51, cover 52, fixing part 53, card slot 54, shell 55, slide bar 56, conveyor belt 551, first knob 552, first rotating shaft 5521, first knob body 5522, second knob 553, first pulley 554, second pulley 555, extension part 556, first motor 557, lens assembly 57, aperture 58, and protective lens 59. DETAILED DESCRIPTION

[0036] 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 the measurement results.

[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0038] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0039] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In addition, the structures, proportions, sizes, etc. drawn in the drawings in the present application are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the restrictive conditions under which the present 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 the present application without affecting the effects and purposes that can be achieved by the present application.

[0041] The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are only part 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 creative work are within the scope of protection of this application.

[0042] 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 as follows.

[0043] See also Figures 1 to 11 , a color analyzer provided in an embodiment of the present application includes:

[0044] A lens 1, an analyzer body 5 and a cutoff filter 6, wherein the lens 1 is connected to the analyzer body 5, and the analyzer body 5 is used to detect a 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; three filter positions are arranged in the analyzer body 5, and the three filter positions 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 arranged at any filter position, or is arranged 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.

[0045] The lens 1 captures the light (light beam) reflected or emitted from the surface of the screen to be tested, focuses the light and guides it into the analyzer body 5, ensuring that the light can enter the subsequent detection process. The lens 1 and the analyzer body 5 are detachably connected, such as a snap connection, a threaded connection, etc., to facilitate the replacement of the lens 1.

[0046] The beam splitter component 2 is located inside the analyzer body 5 and behind the lens 1, and transmits the light captured by the lens 1 to the subsequent filter component 3 and the analysis module 4 without loss. The beam splitter component 2 has good 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 component 2 can determine the number of beam splitting according to the number of filters required by the filter component 3. For example, if the filter component 3 is 3 different filters (red, green, and blue), the beam splitter component 2 needs to divide the 3 beams of light and pass through 3 different filters respectively.

[0047] The beam splitting component 2 can be a transmission optical fiber, or can be one of a grating, a prism, and a beam splitter, wherein the grating and the prism can split the light beam according to different wavelengths.

[0048] The filter assembly 3 includes several different filters, such as 2 filters of different colors arranged side by side, or 3 filters of different colors arranged side by side, or 4 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.

[0049] In one feasible manner, when 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, it is used to decompose the transmitted white light into three basic color components of red, green and blue. Specifically, red light remains after the light beam passes through the red filter, and similarly, green light and blue light remain after the light beam passes through the other two filters.

[0050] The analysis module 4 receives the red, green and blue light signals decomposed by the filter component 3, and converts the light signals into electrical signals through a photoelectric conversion device (such as a photodiode). Subsequently, the analysis module 4 amplifies, filters, performs analog-to-digital conversion and other processing on the electrical signals, and finally calculates the color parameters (such as RGB value, hue, saturation, brightness, etc.) of the surface of the object to be measured.

[0051] 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.

[0052] 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).

[0053] When a single stray light needs to be filtered out, corresponding stray light cutoff filters can be set at three filter 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 one filter position at the same time, or they can be set separately at multiple filter positions. For example, when 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.

[0054] The three filter positions are spaces reserved inside the analyzer body 5 for placing the cut-off filter 6. Among them, the cut-off filter 6 is set between the lens 1 and the beam splitter component 2, which can preliminarily screen or adjust the optical signal entering the beam splitter component 2. The cut-off filter 6 is set between the beam splitter component 2 and the filter component 3, which can purify or adjust the optical signal transmitted to the filter component 3. The filter is set between the filter component 3 and the analysis module 4 to ensure that only the optical signal of a specific wavelength enters the analysis module 4, thereby improving the quality and accuracy of the signal.

[0055] The cut-off filter 6 can be set at any one of the three filter positions at a time. The selection of the position to install the cut-off filter 6 depends on the specific needs and design goals of the color analyzer. For example, if the optical signal collected by the lens 1 contains a lot of stray light, it may be more effective to install the cut-off filter 6 between the lens 1 and the beam splitter 2; if the optical signal generated after the filter component 3 still has stray light interference, it may be more appropriate to install it between the filter component 3 and the analysis module 4.

[0056] In addition, the cutoff filter 6 may be disposed inside the lens 1 , so that stray light of the light beam can be filtered out inside the lens 1 before the light beam enters the analyzer body 5 .

[0057] 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 arranged in the analyzer body, the three filter positions 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 arranged at any filter position, or is arranged 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 result, improving the measurement accuracy, and improving the test accuracy of the color analyzer.

[0058] Please read 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 respectively aligned with the three filter positions, so that the cutoff filter 6 is placed in the filter position along the placement holes 51 .

[0059] Three placement holes 51 are designed on the outer shell (side or top) of the analyzer body 5. The placement holes 51 pass through the outer shell of the analyzer body 5. The three placement holes 51 are respectively aligned with the three filter positions inside the analyzer body 5, so that the cutoff filter 6 can be placed into the analyzer body 5 through the placement holes 5.

[0060] The cut-off filter 6 is detachably connected in the analyzer body 5 , so the cut-off filter can be installed and removed, and its position can be changed, through the placement hole 51 .

[0061] Please read further Figure 5 In this optional embodiment, cover plates 52 are respectively provided on the three placement holes 51 . The cover plates 52 are connected to the housing 55 and fit with the placement holes 51 . The cover plates 52 are used to cover the placement holes 51 .

[0062] In this embodiment, in order to prevent external dust, impurities and moisture from entering the interior of the analyzer body 5 through the placement holes 51, a cover plate 52 is respectively provided on each placement hole 51. The cover plate 52 is an independent small component, and the shape and size of the cover plate 52 and the placement hole 51 are matched. The cover plate 52 is firmly connected to the housing by means of buckles, screws, magnets, etc.

[0063] When not in use or when the cutoff filter 6 has been installed, the three cover plates 52 are respectively covered 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 continues to be closed.

[0064] When the cover 52 is closed, the cover 52 can tightly cover the placement hole 51 without leaving any gaps or spaces, thereby not only effectively shielding 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.

[0065] Please read further Figure 6 In this optional embodiment, fixing members 53 are respectively provided at the three filtering positions, the fixing members 53 are connected to the analyzer body 5 , and a card slot 54 is provided on the fixing member 53 , and the card slot 54 is used to clamp the cutoff filter 6 .

[0066] The fixing part 53 is used to fix the cutoff filter 6 in the analyzer body 5. The fixing part 53 is fixed inside the analyzer body 5 by means of screws, buckles, welding, etc. to ensure that the filter does not loosen or fall off during use. The fixing part 53 is designed with a slot 54, which is used to clamp the cutoff filter 6. The shape and size of the slot 54 match the cutoff filter 6 to ensure that the filter can be easily and accurately inserted and fixed in the slot 54. When the cutoff filter 6 is placed in the slot 54, the two sides of the slot 54 will tightly clamp the filter, thereby firmly fixing the cutoff filter 6 in the filtering position.

[0067] It should be noted that the clamping groove 54 is used to fix the edge of the cut-off filter 6 and will not limit the light transmittance of the main filtering position of the cut-off filter 6 .

[0068] Please read further Figure 7 In order to facilitate the installation and removal of the cut-off filter 6, slide bars 56 are respectively provided at the three filter positions, the slide bars 56 are perpendicular to the irradiation direction of the light beam, the slide bars 56 are connected to the housing 55, the fixing member 53 is movably connected to the slide bars 56, and the fixing member 53 can move freely on the slide bars 53;

[0069] During the installation process, the cover 52 is opened, the cutoff filter 6 is pushed into the slot 54 of the fixing part from the placement hole, and the cover 52 is covered. The cutoff filter 6 is supported by the cover 52 to fix the position of the cutoff filter 6. At this time, the fixing part is restricted and cannot move.

[0070] During the disassembly process, the cover 52 is opened. Without the restriction of the cover 52, the fixing part 53 can move freely on the sliding bar 56. At this time, the analyzer body 5 is tilted so that the fixing part 53 moves along the sliding bar 56 and approaches the placement hole 51 until part of the cutoff filter 6 passes through the placement hole 51. At this time, the cutoff filter 51 can be removed.

[0071] In addition, the sliding rod 56 can be a ball screw, and the fixing part 53 is movably connected to the ball screw. A stepper motor for driving the ball screw to rotate is arranged at the end of the ball screw. The stepper motor is electrically connected to the analysis module. In actual use, the rotation of the ball screw is controlled by the stepper motor. When the ball screw rotates, the fixing part 53 can be controlled to move along the axial direction of the ball screw. Therefore, the fixing part 53 can be electrically controlled to move to the position of the placement hole 51, which is convenient for installing and removing the cutoff filter 6.

[0072] 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.

[0073] The drive assembly is responsible for controlling the cut-off filter 6 to move between the three filter positions to meet the color analyzer's requirements for adjusting the position of the optical element. The cut-off filter 6 is fixed to the drive assembly to ensure that the cut-off filter will not fall off or shift due to vibration or impact during movement.

[0074] When the drive component controls the cut-off filter 6 to move, it moves along a predetermined trajectory, and the predetermined trajectory passes through the above three filter positions in sequence. When the cut-off filter 6 moves to the desired filter position, the drive component controls the cut-off filter 6 to stop moving. The specific structure of the drive component is described as follows:

[0075] Please read further Figure 8 In an optional embodiment, the driving 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 beam transmission path in the analyzer body 5, and the second knob 553 and the second pulley 555 are fixed to the other side of the beam transmission path; a part of the first knob 552 and the second knob 553 are located inside the analyzer body 5, and a part of them are 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 cut-off 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 cut-off filter 6 in three filtering positions.

[0076] The cut-off filter 6 is made of 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, and the deformation does not affect the filtering ability; the light beam transmission path is the path taken by the light beam in the analyzer body during the transmission from the lens 1 to the analysis module.

[0077] Conveyor belt 551( Figure 8 The yellow marked part in the middle is a fully light-transmitting material and will not filter the light beam. One end of the conveyor belt 551 is fixed on the first knob 552, and the other end is connected to the second knob 553 after bypassing the first pulley 554 and the second pulley 555, so that the conveyor belt 551 can reciprocate under the drive of the two knobs. The first knob 552 and the second knob 553 are respectively fixed on both sides of the light beam transmission path in the analyzer body 5, and the movement of the conveyor belt 551 is driven by rotation. The first pulley 554 and the second pulley 555 are respectively installed on both sides of the light beam transmission path. The conveyor belt 551 bypasses the track formed by the first pulley 554 and the second pulley 555, and passes through three filtering positions respectively. Therefore, by controlling the movement of the conveyor belt 551, the filtering position of the stray light filter 6 can be changed.

[0078] For example, if the cut-off 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 cut-off filter 6 moves with the conveyor belt 551, passes through the first pulley 554 and arrives between the beam splitter assembly 2 and the filter assembly 3; if it passes through the second pulley 555, it arrives between the filter assembly 3 and the analysis module 4. If the movement is reversed, it is achieved by controlling the rotation of the first knob 552.

[0079] The conveyor belt 551 is always kept taut between the two knobs, and part of the conveyor belt 551 is wound 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 wound around the first knob 552, and at this time there is no winding 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 wound around the second knob 552, and at this time there is no winding around the first knob 553.

[0080] In another feasible manner, the middle of the conveyor belt 551 is hollowed out, that is, the conveyor belt 551 consists of an upper part and a lower part, the upper part is connected to the upper edge of the cutoff filter 6, and the lower part is connected to the lower edge of the cutoff filter 6. Therefore, the conveyor belt 551 will not block the light beam in the light beam transmission path, thereby reducing the impact on the measurement results.

[0081] See also Fig. 9 In an optional embodiment, both ends of the first pulley 554 and both ends of the second pulley 555 are respectively provided with raised extension portions 556 , and the extension portions 556 are in contact with the edge of the conveyor belt 551 .

[0082] The extension portion 556 serves to support the edge of the conveyor belt 551 , so that 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 .

[0083] See also Fig.10 In an optional embodiment, the driving assembly also 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.

[0084] 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. 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.

[0085] 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 effect of automatically controlling the movement of the conveyor belt can be achieved, so that the position of the cutoff filter can be automatically adjusted according to demand.

[0086] In an optional embodiment, a lens assembly 57 and an aperture 58 are sequentially arranged in the lens 1 along the light beam transmission direction. 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.

[0087] The beam output end of the lens 1 is an end 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 .

[0088] In addition, a protective lens 59 (made of glass) is disposed in the beam output end of the lens 1, and a cut-off filter 6 may be disposed between the aperture 58 and the protective lens 59. Fig.11 .

[0089] In an optional embodiment, the cut-off filter 6 is a near-infrared cut-off filter or is made of an electrochromic material. In the present embodiment, the near-infrared cut-off filter can block the passage of near-infrared light, solve the influence of stray light, especially near-infrared wavelength (wavelength range is between 0.75 microns and 2.5 microns) on the color coordinate measurement, and improve the measurement accuracy. Specifically, after the light beam passes through the near-infrared cut-off filter, the infrared light will be absorbed or reflected, and the 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 changes in 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 weakening unwanted stray light.

[0090] In addition, the cut-off filter 6 can also be made of liquid crystal material, which is a special material state between liquid and solid, and has unique physical and chemical properties. Liquid crystal molecules will change their directional arrangement under the action of an electric field, resulting in changes in the optical properties of the material (such as refractive index, birefringence, etc.). When the liquid crystal material is used as the cut-off filter 6, the transmission path and intensity of the light can be adjusted by controlling the direction and intensity of the electric field, thereby filtering out stray light.

[0091] The cut-off filter 6 can also be a notch filter, which can filter out specific colors (or color ranges). For example, if the notch is located in the yellow area, the filter will block yellow light and allow light of other colors such as red and green to pass through.

[0092] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should 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 cut-off 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 splitter component, a filter component and an analysis module are sequentially arranged in the analyzer body along the light beam transmission direction. Three filter positions are arranged in the analyzer body, and the three filter positions 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 arranged at any filter 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, characterized in that: The outer shell of the analyzer body is provided with three placement holes, and the three placement holes are respectively aligned with the three filter positions, so that the cut-off filter is placed in the filter position along the placement holes.

3. The color analyzer according to claim 2, characterized in that: The three placement holes are respectively provided with cover plates, which are connected to the shell and fit with the placement holes, and are used to cover the placement holes.

4. The color analyzer according to claim 2 or 3, characterized in that: Fixing parts are respectively arranged at the three filtering positions, and the fixing parts are connected to the analyzer body. A card slot is arranged on the fixing parts, and the card slot is 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 arranged 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 on the first knob, and the other end of the conveyor belt extends and is connected to the second knob after being wound around the first pulley and the second pulley; The cut-off filter is fixed on the conveyor belt, and the first knob cooperates with the second knob to control the movement of the cut-off filter in the three filtering positions.

7. The color analyzer according to claim 6, characterized in that: 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, characterized in that: The driving assembly also 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.

9. The color analyzer according to claim 1, characterized in that: A lens assembly and an aperture are sequentially arranged in the lens along the light beam transmission direction. 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.

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