Haze meter and its measurement methods

Abstract

This invention belongs to the field of haze meter devices, specifically disclosing a haze meter, including a light source, a flat lens, a second measuring aperture, a first measuring aperture, an input port of an integrating sphere, and an output port of an integrating sphere arranged coaxially in sequence, forming a light guide axis. It also includes a diffuse light acquisition module connected to the integrating sphere, with the input axis of the diffuse light acquisition module perpendicular to the light guide axis. A light guide and a circuit board are provided at the output port of the integrating sphere. A first channel and a second channel are provided through the light guide component. The circuit board has a first acquisition element corresponding to the first channel and a second acquisition element corresponding to the second channel. The invention also specifically discloses a measurement method for using the haze meter, including the haze meter described above. This solution enables the haze meter to simultaneously and accurately measure the three major optical characteristics of a product: transmittance, haze, and clarity. It also allows for individual or combined adjustment of the light-receiving area in the optical path for the measurement of haze, transmittance, and clarity.

Description

Technical Field

[0001] This invention relates to the field of haze meter instruments, and in particular to a haze meter and its measurement method. Background Technology

[0002] In daily life, materials are generally divided into two main categories: transparent materials and opaque materials. Typical examples of transparent materials include thin films and optical films, while common opaque materials include automotive metallic paint, paint coatings, and paper. Although transparent and opaque materials differ significantly in appearance, they both have three major optical properties: light transmittance, haze, and clarity. These three optical properties are also key parameters for evaluating the optical performance of materials.

[0003] Currently, haze meters, as common optical measuring instruments, are widely used to measure three major optical characteristics: transmittance, haze, and sharpness. Their main core components include an integrating sphere and two light-collecting modules for collecting luminous flux: a diffuse transmission light acquisition module and a direct transmission light acquisition module. The diffuse transmission light acquisition module collects the luminous flux of diffuse transmission light on the integrating sphere, thereby indirectly obtaining the transmittance and haze of the product being measured. The direct transmission light acquisition module, on the other hand, uses the luminous flux of direct transmission light at the light-emitting port of the integrating sphere to indirectly obtain the sharpness of the product being measured. For a detailed description of the haze meter's structure, refer to the technical solution in patent application CN201610681357.X, which discloses a sharpness measuring device including a first light source system, an imaging system, and a first detector. The sample being measured is placed between the imaging system and the first detector, or between the imaging elements of the imaging system. The light source or light-emitting port of the first light source system is imaged onto the detection surface of the first detector after passing through the imaging system. The first detector is a one-dimensional linear array or a two-dimensional planar array detector. While this technical solution uses a first detector at the first measurement window of the integrating sphere to receive and measure the emitted light, it essentially collects a mixture of stray light and the original light from the direct transmission. This means it cannot collect the filtered light after stray light removal, nor can it separate the original light from the direct transmission. Consequently, it can only be used to measure the sharpness of various samples with different scattering characteristics, but it cannot accurately calculate the sharpness of the direct transmission based on the relevant luminous flux. In other words, it cannot simultaneously and accurately measure the three major optical characteristics: transmittance, haze, and sharpness. Furthermore, this technical solution cannot independently adjust the light-receiving area in the optical path to optimize the measurement conditions for haze and transmittance, nor can it independently adjust the light-receiving area in the optical path to improve the measurement conditions for sharpness. When the optical path must simultaneously measure haze, transmittance, and sharpness, the measurement error within the same optical path accumulates and amplifies, thus affecting the overall measurement effect and accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a haze meter and its measurement method, which enables the haze meter to simultaneously and accurately measure the three major optical characteristics of a product: light transmittance, haze, and clarity. It also allows for individual or combined adjustment of the light-receiving area in the optical path for the measurement of haze, light transmittance, and clarity, thereby reducing the cumulative measurement error.

[0005] The technical solution provided by this invention is as follows: a haze meter, including a light source, an integrating sphere, and a diffuse light acquisition module disposed on the outer peripheral surface of the integrating sphere for collecting the light flux of diffuse transmitted light. The light-incident end of the diffuse light acquisition module is connected to the integrating sphere. The light-incident port of the integrating sphere is provided with a first measuring aperture for adjusting the light-incident area of ​​the light-incident area for adjusting the light transmittance and haze. The meter also includes a flat lens and a second measuring aperture for adjusting the light-incident area of ​​the light-incident area. The light source, the flat lens, the second measuring aperture, the first measuring aperture, the light-incident port of the integrating sphere, and the light-outcident port of the integrating sphere are arranged coaxially in sequence and form a light guide axis. The light guide axis is perpendicular to the light-incident axis of the diffuse light acquisition module.

[0006] The integrating sphere has a light guide and a circuit board at its light-emitting port. The light guide has a first channel coaxial with the light guide axis and a second channel located on one side of the first channel. The light-inlet and light-outlet ports of the second channel are both arc-shaped and coaxial with the axis of the first channel. The outer arc radius of the light-inlet port of the second channel is equal to the inner arc radius of the light-outlet port of the first channel.

[0007] The circuit board is provided with a first acquisition element and a second acquisition element. The first acquisition element is directly opposite to the light output port of the first channel, and the second acquisition element is directly opposite to the light output port of the second channel and is spaced apart.

[0008] The haze meter described above also includes a light collecting tube, one end of which is open. The second measuring aperture is located on the open end of the light collecting tube. The light source and the flat lens are located inside the light collecting tube. The light source, the flat lens, and the second measuring aperture are arranged sequentially.

[0009] In the aforementioned haze meter, an auxiliary light source that emits light inward is also provided on the side of the light collecting tube.

[0010] In the aforementioned haze meter, the inner circumferential surfaces of both the first channel and the second channel are provided with threads.

[0011] In the haze meter described above, there are at least two second channels arranged in a circular array with the axis of the first channel as the center. The number of the second acquisition elements is the same as that of the second channels, and they are arranged facing each other.

[0012] In the haze meter described above, the apertures of the light-incident and light-outcident ports of the first channel are equal and both are smaller than the diameter of the middle part of the first channel.

[0013] The apertures at both the light inlet and light outlet ports of the second channel are smaller than the diameter of the middle part of the second channel.

[0014] In the haze meter described above, the light guiding component includes an incident light aperture, a guide light base, and an exit light aperture connected in sequence. The exit light aperture is spaced apart from the second acquisition element, and the circuit board is connected to the guide light base.

[0015] Both the input light aperture and the output light aperture are provided with circular holes. The guide light seat is provided with a first straight hole and a second straight hole. The first straight hole is located between the two circular holes and is coaxially connected with the two circular holes to form the first channel.

[0016] The light entrance aperture is further provided with a first arc-shaped hole, and the light exit aperture is further provided with a second arc-shaped hole. The inner arc radius of the second arc-shaped hole is equal to the outer arc radius of the first arc-shaped hole. The first arc-shaped hole, the second straight hole, and the second arc-shaped hole are aligned and connected to form the second channel.

[0017] The aforementioned haze meter also includes a mounting base, which has an external support arm and a mounting through hole. The light guide component passes through the mounting through hole and is connected to the mounting base.

[0018] In the aforementioned haze meter, the mounting base has at least three first connecting holes arranged around the mounting through hole, and the light guide component has a second connecting hole and a bolt assembly located in the second connecting hole. The number of the second connecting hole, the bolt assembly, and the first connecting hole are the same, and the three correspond one-to-one with each other. The diameter of the first connecting hole, the diameter of the second connecting hole, and the outer contour diameter of the bolt assembly increase sequentially, and the bolt assembly is threadedly connected to the corresponding first connecting hole.

[0019] The haze meter uses a measurement method, including the haze meter described above, comprising:

[0020] A light source, a flat lens, a second measuring aperture, a first measuring aperture, and an integrating sphere are sequentially arranged along the light guide axis. Then, a light guide component and a circuit board are installed at the light output port of the integrating sphere, so that the first channel of the light guide component is coaxial with the light guide axis.

[0021] The product under test is placed on the side of the second measuring aperture facing the first measuring aperture, and the angle between the light-receiving areas of the second measuring aperture and the first measuring aperture and the sample under test is within a specified small angle range.

[0022] The light flux inside the integrating sphere is collected by a diffuse light acquisition module, a light guide component, and a circuit board to calculate haze, transmittance, and sharpness.

[0023] The beneficial effects of this invention after adopting the above technical solution are as follows:

[0024] In this technical solution, the light source is refracted by a flat lens into a parallel beam. The parallel beam first penetrates the second measuring aperture, which controls the light-receiving area for clarity measurement. Then, it penetrates the product under test to reach the first measuring aperture, which controls the light-receiving area for haze and transmittance measurement. In practical use, by changing the first or second measuring aperture to different specifications, the light-receiving area can be optimized according to the corresponding purpose. After passing through the first measuring aperture, the parallel beam reaches the interior of the integrating sphere from the light-incident port and exits from the light-out port. This beam trajectory extends from the light source to the light-out port of the integrating sphere, forming the light guide axis of the device. The parallel beam then reaches the light guide component from the light-out port of the integrating sphere and becomes directly transmitted light. The directly transmitted light is separated by the light guide component into the original light and the filtered light after eliminating stray light. The original light and the filtered light are then guided to the circuit board, respectively, and then... The first light-collecting element and the corresponding second light-collecting element collect luminous flux, thereby indirectly and accurately calculating the product's sharpness. When guiding the original light, the first channel on the light guide component uses the light guide axis as a reference, and the second channel uses the axis of the first channel as a reference. This ensures that the two channels are accurately aligned with the center positions of the light source, the flat-head mirror, the second measuring aperture, and the first measuring aperture, guaranteeing the effectiveness of collecting the luminous flux of the original light and the filter, and improving the acquisition accuracy. In the above process, the light that can penetrate the object and enter the integrating sphere in the parallel beam is called the transmitted light. After continuous reflection within the integrating sphere, the transmitted light is collected by the diffused light collection module perpendicular to the light guide axis within the integrating sphere. This allows the haze meter to simultaneously and accurately measure the three major optical characteristics of the product: transmittance, haze, and sharpness. It also allows for individual or combined adjustment of the light-receiving area in the optical path for haze and transmittance measurements and sharpness measurements, reducing cumulative measurement errors. Attached Figure Description

[0025] Figure 1 This is a front view of the light guide component and circuit board according to Embodiment 1 of the present invention;

[0026] Figure 2 This is a rear view structural diagram of the light guide component and circuit board according to Embodiment 1 of the present invention;

[0027] Figure 3 This is an exploded view of the light guide component and circuit board according to Embodiment 1 of the present invention;

[0028] Figure 4 This is an assembly diagram of the entrance aperture, guide light seat, and exit aperture according to Embodiment 1 of the present invention;

[0029] Figure 5 This is a rear view structural schematic diagram of the guide light seat according to Embodiment 1 of the present invention;

[0030] Figure 6 This is a cross-sectional view of the light guide component and circuit board according to Embodiment 1 of the present invention;

[0031] Figure 7 This is a schematic diagram of the haze meter according to Embodiment 1 of the present invention.

[0032] Reference numerals: 1. Mounting base; 2. Bolt assembly; 3. Entrance aperture; 4. Circular hole; 5. Guide light base; 6. Circuit board; 7. Positioning pin; 8. Exit aperture; 9. Screw; 10. Haze meter;

[0033] 11. Support arm; 12. Mounting through hole; 13. First connecting hole;

[0034] 21. Connecting bolts; 22. Connecting washers; 23. Corrugated washers;

[0035] 31. First arc-shaped hole; 32. First raised edge;

[0036] 51. First bayonet; 52. Boss; 53. Second connecting hole; 54. Countersunk; 55. Second straight hole; 56. First straight hole; 57. Second bayonet;

[0037] 61. First data acquisition element; 62. Second data acquisition element;

[0038] 81. Second arc-shaped hole; 82. Second raised edge;

[0039] 101. Light source; 102. Measuring aperture; 103. Product under test; 104. Integrating sphere; 105. Flat lens; 106. Auxiliary light source; 107. Diffused light acquisition module. Detailed Implementation

[0040] The technical solution of the present invention will be further described in detail below with reference to specific embodiments, but this does not constitute any limitation on the present invention.

[0041] Example 1:

[0042] like Figure 1-7As shown, the haze meter 10 includes a light source 101, an integrating sphere 104, and a diffuse light acquisition module 107 disposed on the outer peripheral surface of the integrating sphere 104 for collecting the light flux of diffuse transmitted light. The light-incident end of the diffuse light acquisition module 107 is connected to the integrating sphere 104. The light-incident port of the integrating sphere 104 is provided with a first measuring aperture 102 for adjusting the light transmittance and haze. It also includes a flat lens 105 and a second measuring aperture 102 for adjusting the light-incident area. The light source 101, the flat lens 105, the second measuring aperture 102, the first measuring aperture 102, the light-incident port of the integrating sphere 104, and the light-outcident port of the integrating sphere 104 are arranged coaxially in sequence and form a light guide axis. The light guide axis is perpendicular to the light-incident axis of the diffuse light acquisition module 107.

[0043] The integrating sphere 104 has a light guide and a circuit board 6 at its light output port. The light guide has a first channel coaxial with the light guide axis and a second channel located on one side of the first channel. The light input and output ports of the second channel are both arc-shaped and coaxial with the axis of the first channel. The outer arc radius of the light input port of the second channel is equal to the inner arc radius of the light output port of the first channel.

[0044] The circuit board 6 is provided with a first acquisition element 61 and a second acquisition element 62. The first acquisition element 61 is directly opposite to the light output port of the first channel, and the second acquisition element 62 is directly opposite to the light output port of the second channel and is spaced apart.

[0045] The specific working principle is as follows: the light source 101 is refracted into a parallel beam by the flat lens 105. The parallel beam first penetrates the second measuring aperture 102, which controls the light-receiving area for clarity measurement. Then, it penetrates the product under test 103 to reach the first measuring aperture 102, which controls the light-receiving area for haze and transmittance measurement. In actual use, by replacing the first or second measuring aperture 102 with different specifications, the light-receiving area can be optimized according to the corresponding purpose, and the parallel beam... Continuing through the first measuring aperture 102, the light beam reaches the interior of the integrating sphere 104 from its entrance port and exits from its exit port. This beam trajectory, extending from the light source 101 to the exit port of the integrating sphere 104, forms the light guide axis of the device. The parallel beam then reaches the light guide component from the exit port of the integrating sphere 104 and becomes directly transmitted light. The directly transmitted light is separated by the light guide component into the original directly transmitted light and a filtered light after stray light elimination. The original light and the filtered light are then guided to the circuit board 6, respectively. The light flux is collected by the first light-collecting element 61 corresponding to the original light and the second light-collecting element 62 corresponding to the filter on the circuit board 6, thereby indirectly and accurately calculating the sharpness of the product. When guiding the original light, the first channel on the light guide component is referenced to the light guide axis, and the second channel is referenced to the axis of the first channel. This ensures that the two channels are accurately aligned with the center positions of the light source 101, the flat-head mirror, the second measuring aperture 102, and the first measuring aperture 102, ensuring the effectiveness of collecting the light flux of the original light and the filter and improving the light collection efficiency. Accuracy is achieved through the following process: In the parallel beam, the light that can penetrate the object and enter the integrating sphere 104 is called the transmitted light. After continuous reflection within the integrating sphere 104, the transmitted light is collected by the diffused transmitted light acquisition module 107 perpendicular to the light guide axis within the integrating sphere 104. This enables the haze meter 10 to simultaneously and accurately measure the three major optical characteristics of the product: transmittance, haze, and clarity. It also allows for individual or combined adjustment of the light-receiving area in the optical path for the measurement of haze, transmittance, and clarity, thereby reducing the cumulative measurement error.

[0046] Preferably, it further includes a light collecting tube, one end of which is an open end. The second measuring aperture 102 is disposed on the open end of the light collecting tube. The light source 101 and the flat lens 105 are disposed inside the light collecting tube. The light source 101, the flat lens 105, and the second measuring aperture 102 are arranged sequentially.

[0047] Another preferred embodiment is that the side of the light-collecting tube is also provided with an auxiliary light source 106 that emits light inward.

[0048] The light guide component has two independent channels, namely the first channel and the second channel. These two channels create two independent optical paths, preventing interference and mixing between the original light from the direct-transmitted light and the filtered light after stray light removal. The output port of the first channel faces the first acquisition element 61 on the circuit board 6. After the direct-transmitted light enters the first channel, it is guided to the first acquisition element 61, which collects the luminous flux of the original direct-transmitted light. The input and output ports of the second channel are both arc-shaped, with the outer arc radius of the input port equal to the inner arc radius of the output port, enabling the second channel to eliminate stray light. The function of stray light is that after the directly transmitted light enters the second channel, it is filtered to eliminate stray light and then output from the light output port of the second channel. The light output port of the second channel is directly opposite the second acquisition element 62 on the circuit board 6. The second acquisition element 62 collects the luminous flux of the filtered light after eliminating stray light. The light output port of the second channel and the second acquisition element 62 are spaced apart to ensure that the second acquisition element 62 collects the filtered light after eliminating stray light. This achieves independent collection of the luminous flux of both the original light of the directly transmitted light and the filtered light after eliminating stray light, thereby providing accurate data for calculating and obtaining the clarity of the tested product 103.

[0049] In practical applications, the specific formula for calculating sharpness detection is: C% = (Mm) / (M+m)*100%, where M and m represent the maximum and minimum luminous flux through the moving grating. M and m can also represent the direct transmission and diffuse transmission luminous flux. According to the above formula, this embodiment provides the luminous flux of the direct transmission light required for calculating sharpness by collecting the luminous flux of the original direct transmission light and the filtered direct transmission light after eliminating stray light.

[0050] Further improvements include the addition of threads on the inner circumferential surfaces of both the first and second channels.

[0051] The aforementioned thread configuration allows the first and second channels to enhance their ability to eliminate stray light through the thread.

[0052] Preferably, there are at least two second channels arranged in a circular array with the axis of the first channel as the center. The number of second acquisition elements 62 and the number of second channels are the same, and they are arranged facing each other.

[0053] In this embodiment, four second channels are arranged in a circular array around the axis of the first channel, that is, they are distributed around the first channel to obtain the filtering corresponding to each point of the direct transmitted light velocity, thereby improving the sampling capacity and improving the sampling tolerance and accuracy.

[0054] In practice, the apertures of the light inlet and light outlet ports of the first channel are equal and both smaller than the diameter of the middle part of the first channel; the apertures of the light inlet and light outlet ports of the second channel are both smaller than the diameter of the middle part of the second channel.

[0055] Another preferred embodiment is that the light output port of the first channel is spaced apart from the first acquisition element 61.

[0056] The specific structure of the light guide component is as follows: the light guide component includes an input light aperture 3, a light guide seat 5 and an output light aperture 8 connected in sequence. The output light aperture 8 is spaced apart from the second acquisition element 62, and the circuit board 6 is connected to the light guide seat 5.

[0057] Both the entrance aperture 3 and the exit aperture 8 are provided with circular holes 4. The guide light seat 5 is provided with a first straight hole 56 and a second straight hole 55. The first straight hole 56 is located between the two circular holes 4 and is coaxially connected with the two circular holes 4 to form a first channel.

[0058] The light entrance aperture 3 is provided with a first arc-shaped hole 31, and the light exit aperture 8 is provided with a second arc-shaped hole 81. The inner arc radius of the second arc-shaped hole 81 is equal to the outer arc radius of the first arc-shaped hole. The first arc-shaped hole 31, the second straight hole 55, and the second arc-shaped hole 81 are aligned and connected to form a second channel.

[0059] In this embodiment, the diameter of the circular hole 4 is smaller than the diameter of the first straight hole 56, and the diameters of both the first arc-shaped hole 31 and the second arc-shaped hole 81 are smaller than the diameter of the second straight hole 55. The threads in the first channel and the second channel are specifically provided on the inner circumferential surfaces of the first straight hole 56 and the second straight hole 55.

[0060] In practical applications, both the entrance aperture 3 and the exit aperture 8 are made of stainless steel and have undergone blackening surface treatment on their outer surfaces; the guide light seat 5 is made of aluminum and has undergone matte black treatment by anodizing, which gives the guide light seat 5 the functions of heat dissipation and elimination of stray light; the distance between the end face of the acquisition element on the circuit board 6 and the exit aperture 8 is 1mm, that is, the distance between the first acquisition element 61 and the light output port of the first channel is 1mm, and the distance between the second acquisition element 62 and the second arc-shaped hole 81 is 1mm.

[0061] In practical use, the directly transmitted light enters the first and second channels, which are composed of the entrance aperture 3, the guide light seat 5, and the exit aperture. There are four second channels surrounding the first channel. The entrance and exit ports of each second channel are arc-shaped and staggered. The directly transmitted light enters the four separate second channels, eliminating stray light again. The first channel and its two ports (specifically the circular hole 4 and the first straight hole 56) are used to detect the original value of the directly transmitted light and also serve as auxiliary positioning marks to adjust the coaxiality of the first channel axis with the output axis of the integrating sphere 104, or the coaxiality of the first channel axis with the axis of the directly projected beam.

[0062] In the specific connection, the input light aperture 3 and the output light aperture 8 are both connected and assembled on the guide light base 5 by dispensing glue (specifically black silicone); the circuit board 6 is connected to the guide light base 5 by screws 9, which has a firm connection and can prevent loosening caused by vibration of the acquisition device or other components.

[0063] Preferably, the guide light seat 5 is provided with a boss 52 facing the light entrance aperture 3, the light entrance aperture 3 is connected to the boss 52, and the first straight hole 56 and the second straight hole 55 both pass through the boss 52.

[0064] In specific implementation, the boss 52 is located on the axial extension line of the first straight hole 56 and the second straight hole 55, and is penetrated by the first straight hole 56 and the second straight hole 55, so as to avoid obstructing the light from passing through the first straight hole 56 and the second straight hole 55. The setting of the boss 52 increases the local thickness of the guide light seat 5 corresponding to the first straight hole 56 and the second straight hole 55, thereby increasing the axial depth of both the first straight hole 56 and the second straight hole 55. As the axial depth of the second straight hole 55 gradually increases, the effect of eliminating stray light in the second channel gradually becomes stronger.

[0065] It should be noted that the thickness of the guide light seat 5 is positively correlated with the degree of elimination of stray light, that is, the optical distance for eliminating stray light determines the thickness of the guide light seat 5.

[0066] Further improvements include positioning protrusions on the edges of both the input light aperture 3 and the output light aperture 8, and positioning slots on the guide light seat 5 that correspond one-to-one with the two positioning protrusions, with the positioning protrusions being engaged in the corresponding positioning slots.

[0067] In some embodiments, the edge of the light entrance aperture 3 is provided with a first protrusion 32 (i.e., the positioning protrusion on the light entrance aperture 3), and the boss 52 is provided with a first slot 51 (i.e., the first positioning slot on the guide light seat 5), and the first protrusion 32 is engaged in the first slot 51.

[0068] The first protruding edge 32 and the first bayonet 51 are designed so that when the entrance aperture 3 is connected to the guide light seat 5 (specifically connected to the end face of the boss 52), it can be positioned circumferentially by the first protruding edge 32 being engaged in the first bayonet 51 (specifically set at the edge of the boss 52). This not only prevents mistaken connection when assembling the entrance aperture 3 and the guide light seat 5, but also ensures that after the entrance aperture 3 and the guide light seat 5 are connected, the round hole 4 on the entrance aperture 3 is aligned with the first straight hole 56 on the guide light seat 5, and the first arc-shaped hole 31 on the entrance aperture 3 is aligned with the second straight hole 55 on the guide light seat 5, thereby improving the installation accuracy.

[0069] Preferably, the first notch 51 is a notch at the edge of the boss 52, and the first notch 51 penetrates the side of the boss 52; the end face of the boss 52 is provided with a recessed platform 54, and the light entrance aperture 3 is connected to the recessed platform 54; the first notch 51 connects the recessed platform 54 and the outer side of the side of the boss 52.

[0070] In some embodiments, a second protruding edge 82 (i.e., a positioning protruding edge on the light-emitting aperture 8) is provided on the edge of the light-emitting aperture 8, and a second slot 57 (i.e., a second positioning slot on the guide light seat 5) is provided in the recess, and the second protruding edge 82 is engaged in the second slot 57.

[0071] Similarly, the second protruding edge 82 and the second bayonet 57 are provided so that when the light-emitting aperture 8 is connected to the guide light seat 5 (specifically connected to the bottom end face of the recessed platform), it can be positioned circumferentially by the second protruding edge 82 being engaged with the second bayonet 57 (specifically set inside the recessed platform). This not only prevents mistaken connection when assembling the light-emitting aperture 8 and the guide light seat 5, but also ensures that after the connection between the light-emitting aperture 8 and the guide light seat 5 is completed, the round hole 4 on the light-emitting aperture 8 is aligned with the first straight hole 56 on the guide light seat 5, and the first arc-shaped hole 31 on the light-emitting aperture 8 is aligned with the second straight hole 55 on the guide light seat 5, thereby improving the installation accuracy.

[0072] Preferably, the inner diameter of the second bayonet 57 is greater than the outer diameter of the second convex edge 82.

[0073] In some implementations, protrusions, bumps, inserts, or terminals can be used as alternatives for positioning, but this embodiment does not impose too many restrictions on this.

[0074] In other embodiments, the first protruding edge 32 can be disposed on the entrance aperture 3 or the boss 52. Correspondingly, when the first protruding edge 32 is disposed on the boss 52, the first latch 51 is opened at the edge of the entrance aperture 3. Similarly, the second protruding edge 82 can be disposed on the exit aperture 8 or the recess. Correspondingly, when the second protruding edge 82 is disposed in the recess, the second latch 57 is disposed at the edge of the exit aperture 8. This embodiment does not impose too many restrictions on this.

[0075] Preferably, the light guide seat 5 has a recessed platform facing the circuit board 6, the circuit board 6 is attached to the light guide seat 5 to close the recessed platform, the light output aperture 8 is connected in the recessed platform, and the first acquisition element 61 and the second acquisition element 62 are both located in the recessed platform.

[0076] The recessed platform allows the guide light base 5 and the circuit board 6 to be connected in a fitted manner, together enclosing a cavity within the guide light base 5. The light output aperture 8, the first acquisition element 61, and the second acquisition element 62 are all located within this cavity. Placing the light output aperture 8, the first acquisition element 61, and the second acquisition element 62 in a sealed space can prevent dust and fine particles from falling onto the first acquisition element 61 and the second acquisition element 62, ensuring that the directly transmitted light is free of impurities and interference from shadows caused by impurities during acquisition, so as not to affect the acquired data. It can also prevent the light output aperture 8, the first acquisition element 61, and the second acquisition element 62 from being affected by contact with the outside world, thus avoiding damage to the acquisition accuracy.

[0077] Another improvement of this embodiment includes a fixing base 1, which is provided with an external support arm 11 and a mounting through hole 12. The light guide component passes through the mounting through hole 12 and is connected to the fixing base 1.

[0078] In this embodiment, a fixing base 1 is set up, which serves as a fixing carrier for the light guide component. The light guide component is inserted into the mounting through hole 12 on the fixing base 1, and then the light guide component is fixed to optical instruments such as the haze meter 10 and the integrating sphere 104 by the support arm 11 on the fixing base 1. This allows the light guide component to receive the direct transmitted light output from the integrating sphere 104 on the haze meter 10, or the direct transmitted light output from the integrating sphere 104 instrument. The specific structure of the support arm 11 can be adjusted or replaced according to different external objects. This embodiment does not impose too many restrictions on the specific structure of the support arm 11.

[0079] In specific implementation, the support arm 11 and the fixed seat 1 are connected by bolts. A positioning pin 7 is provided between the support arm 11 and the fixed seat 1. The positioning pin 7 is inserted into the support arm 11 and the fixed seat 1 respectively. The setting of the positioning pin 7 prevents the support arm 11 from rotating relative to the fixed seat 1 around the bolt. In addition, the support arm 11 and the fixed seat 1 can also be connected by snap-fit ​​or adhesive to replace the bolt connection. This embodiment does not impose too many restrictions on this.

[0080] In this embodiment, there are two support arms 11, which are respectively located on opposite sides of the fixed base 1. The structures of the two support arms 11 can be the same or different. This embodiment does not impose too many restrictions on this.

[0081] As a further improvement of this embodiment, the fixing base 1 is provided with at least three first connecting holes 13 arranged around the mounting through holes 12, and the light guide component is provided with second connecting holes 53 and bolt assembly 2 located in the second connecting holes 53. The number of the second connecting holes 53, bolt assembly 2 and first connecting holes 13 are the same, and the three correspond to each other one by one. The diameter of the first connecting hole 13, the diameter of the second connecting hole 53 and the outer contour diameter of the bolt assembly 2 increase sequentially, and the bolt assembly 2 is threadedly connected to the corresponding first connecting hole 13.

[0082] In this embodiment, at least three of each of the first connecting hole 13, the second connecting hole 53, and the bolt assembly 2 are provided, and all three are the same number. Taking three of each as an example, the first connecting hole 13, the second connecting hole 53, and the bolt assembly 2 together form a three-point positioning connection centered on the center of the mounting through hole 12, fixing the light guide component at the center of the mounting through hole 12. Since the diameter of the second connecting hole 53 is larger than the diameter of the first connecting hole 13, the light guide base 5 and the fixing base 1 can utilize the first connecting hole 13 during the assembly process. The aperture difference between the first connecting hole 13 and the second connecting hole 53 is offset (i.e., the first connecting hole 13 and the second connecting hole 53 are not coaxially set), thereby adjusting the relative position of the light guide seat 5 on the fixed seat 1 (the specific adjustment process is that the light guide component is relatively translated on the fixed seat 1). It can adjust the first channel of the light guide component to be coaxially set with the mounting through hole 12 according to actual needs, and it can also adjust the first channel of the light guide component to be coaxially set with the direct transmission light according to actual needs. The accuracy of the coaxiality adjustment of the light guide component on the fixed seat 1 is less than or equal to μm.

[0083] In this embodiment, the second connecting hole 53 is provided on the light guide seat 5. The first connecting hole 13, the second connecting hole 53 and the bolt assembly 2 are all set to four, and are all centrally symmetrical about the center of the mounting through hole 12. The four connecting bolts 21 pass through the corresponding second connecting hole 53 on the light guide seat 5 and are locked in the first connecting hole 13 on the fixing seat 1. Without locking the four connecting bolts 21, the light guide component is in a state of adjustable translation and can be adjusted in real time according to the assembly requirements.

[0084] The specific structure of the bolt assembly 2 includes a connecting bolt 21 and a connecting washer 22 sleeved on the connecting bolt 21. The connecting bolt 21 passes through the second connecting hole 53 and is threadedly connected to the first connecting hole 13. The outer diameter of the connecting washer 22 is larger than the diameter of the second connecting hole 53. The connecting washer 22 is sandwiched between the fixing seat 1 and the head of the connecting bolt 21.

[0085] In some embodiments, the outer diameter of the head of the connecting bolt 21 can be set to be larger than the diameter of the second connecting hole 53, and the head of the connecting bolt 21 can be abutted against the guide light seat 5, thereby fixing the guide light seat 5 on the fixing seat 1, so as to eliminate the need to use the connecting gasket 22.

[0086] In some embodiments, a corrugated washer 23 is also fitted on the connecting bolt 21 between the connecting washer 22 and the head of the connecting bolt 21, so as to tighten between the head of the connecting bolt 21 and the connecting washer 22, and press the connecting washer 22 against the guide light seat 5.

[0087] A method for measuring clarity, including the haze meter 10 as described above, comprising:

[0088] A light source 101, a flat lens 105, a second measuring aperture 102, a first measuring aperture 102, and an integrating sphere 104 are sequentially arranged along the light guide axis. Then, a light guide component and a circuit board 6 are installed at the light output port of the integrating sphere 104, so that the first channel of the light guide component is coaxially arranged with the light guide axis.

[0089] The product under test 103 is placed on the side of the second measuring aperture 102 facing the first measuring aperture 102, and the angle between the light-receiving areas of the second measuring aperture 102 and the first measuring aperture 102 and the sample under test is within a specified small angle range.

[0090] The light flux inside the integrating sphere 104 is collected by the diffuse light acquisition module 107, the light guide component 5, and the circuit board 6 to calculate the haze, transmittance, and clarity.

[0091] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A haze meter, comprising a light source (101), an integrating sphere (104), and a diffuse light acquisition module (107) disposed on the outer peripheral surface of the integrating sphere (104) for acquiring the luminous flux of diffuse transmitted light, wherein the light-incident end of the diffuse light acquisition module (107) is connected to the integrating sphere (104), and the light-incident port of the integrating sphere (104) is provided with a first measuring aperture for adjusting the light-incident area of ​​the light-incident area and the haze, characterized in that, It also includes a flat lens (105) and a second measuring aperture (102) for adjusting the light-gathering area. The light source (101), the flat lens (105), the second measuring aperture (102), the first measuring aperture, the light-incident port of the integrating sphere (104) and the light-outcident port of the integrating sphere (104) are arranged coaxially in sequence and form a light guide axis. The light guide axis is perpendicular to the light-incident axis of the diffuse light acquisition module (107). The integrating sphere (104) has a light guide and a circuit board (6) at its light output port. The light guide has a first channel coaxial with the light guide axis and a second channel located on one side of the first channel. The light input and output ports of the second channel are both arc-shaped and coaxial with the axis of the first channel. The outer arc radius of the light input port of the second channel is equal to the inner arc radius of the light output port of the first channel. The circuit board (6) is provided with a first acquisition element (61) and a second acquisition element (62). The first acquisition element (61) is directly opposite to the light output port of the first channel, and the second acquisition element (62) is directly opposite to the light output port of the second channel and is spaced apart. The apertures at the light inlet and light outlet ports of the first channel are equal and both are smaller than the diameter of the middle part of the first channel. The apertures of the light inlet and light outlet ports of the second channel are both smaller than the diameter of the middle part of the second channel; the light guide component includes an inlet light aperture (3), a light guide seat (5) and an outlet light aperture (8) connected in sequence, the outlet light aperture (8) is spaced apart from the second acquisition element (62), and the circuit board (6) is connected to the light guide seat (5); Both the light entrance aperture (3) and the light exit aperture (8) are provided with circular holes (4). The light guide seat (5) is provided with a first straight hole (56) and a second straight hole (55). The first straight hole (56) is located between the two circular holes (4) and is coaxially connected with the two circular holes (4) to form the first channel. The light-inlet aperture (3) is also provided with a first arc-shaped hole (31), and the light-outlet aperture (8) is also provided with a second arc-shaped hole (81). The inner arc radius of the second arc-shaped hole (81) is equal to the outer arc radius of the first arc. The first arc-shaped hole (31), the second straight hole (55) and the second arc-shaped hole (81) are aligned in sequence and connected to form the second channel.

2. The haze meter according to claim 1, characterized in that, It also includes a light collecting tube, one end of which is open. The second measuring aperture (102) is located on the open end of the light collecting tube. The light source (101) and the flat lens (105) are located inside the light collecting tube. The light source (101), the flat lens (105) and the second measuring aperture (102) are arranged in sequence.

3. The haze meter according to claim 2, characterized in that, The light-collecting tube is also provided with an auxiliary light source (106) that emits light inward on its side.

4. The haze meter according to claim 1, characterized in that, Both the first channel and the second channel have threads on their inner circumferential surfaces.

5. The haze meter according to claim 1, characterized in that, The second channel has at least two and is arranged in a circular array with the axis of the first channel as the center. The number of the second acquisition element (62) is the same as that of the second channel, and they are arranged facing each other.

6. The haze meter according to any one of claims 4-5, characterized in that, It also includes a fixing base (1), on which a support arm (11) for external connection is provided. The fixing base (1) is also provided with a mounting through hole (12), and the light guide component passes through the mounting through hole (12) and is connected to the fixing base (1).

7. The haze meter according to claim 6, characterized in that, The fixing base (1) has at least three first connecting holes (13) arranged around the mounting through hole (12). The light guide component has a second connecting hole (53) and a bolt assembly (2) located in the second connecting hole (53). The number of the second connecting hole (53), the bolt assembly (2) and the first connecting hole (13) are the same, and the three correspond to each other one by one. The diameter of the first connecting hole (13), the diameter of the second connecting hole (53) and the outer contour diameter of the bolt assembly (2) increase sequentially. The bolt assembly (2) is threadedly connected to the corresponding first connecting hole (13).

8. A haze meter using a measurement method, including the haze meter as described in any one of claims 1-7, characterized in that, include: A light source (101), a flat lens (105), a second measuring aperture (102), a first measuring aperture, and an integrating sphere (104) are arranged sequentially along the light guide axis. Then, a light guide component and a circuit board (6) are installed at the light output port of the integrating sphere (104) so ​​that the first channel of the light guide component is coaxial with the light guide axis. The product under test (103) is placed on the side of the second measuring aperture (102) facing the first measuring aperture, and the angle between the light-receiving areas of the second measuring aperture (102) and the first measuring aperture and the sample under test is within a specified small angle range. The light flux inside the integrating sphere (104) is collected by the diffuse light acquisition module, the light guide component and the circuit board (6) to calculate the haze, transmittance and sharpness.

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