Haze meter and measurement method using same

Abstract

The invention belongs to the field of haze meter tools, and particularly discloses a haze meter which comprises a light emitting source, a plate lens, a second measuring aperture, a first measuring aperture, a light inlet port of an integrating sphere and a light outlet port of the integrating sphere which are sequentially and coaxially arranged, and further comprises a scattered and transmitted light acquisition module communicated with the integrating sphere, the light incidence axis of the scattered and transmitted light acquisition module is perpendicular to the light guide axis; a light guide part and a circuit board are arranged at a light outlet port of the integrating sphere, a first channel and a second channel are arranged on the light guide part in a penetrating manner, and a first acquisition element corresponding to the first channel and a second acquisition element corresponding to the second channel are arranged on the circuit board. According to the scheme, the haze meter not only can accurately measure three optical characteristic indexes of the transmittance, the haze and the definition of a product at the same time, but also can independently or comprehensively adjust the light inlet area for the measurement of the haze and the transmittance and the measurement of the definition in a light path.

Description

Technical Field

[0001] The invention relates to the field of haze meter tools, in particular to a haze meter and a use and measurement method thereof. Background Art

[0002] In daily life, materials are usually divided into two categories: transparent materials and opaque materials. Typical representatives of transparent materials include thin films and optical films, while common opaque materials include automotive metallic paint, paint coatings and paper. Although there are significant differences in appearance between transparent and opaque materials, they both have three major optical property indicators: transmittance, haze and clarity. Transmittance, haze and clarity are also the key parameters for evaluating the optical properties of materials.

[0003] At present, haze meter, as a common optical measuring instrument, is widely used to measure three major optical characteristic indicators: transmittance, haze and clarity. Its main core components include an integrating sphere and a diffuse transmission light collection module and a direct transmission light collection module for collecting luminous flux. The diffuse transmission light collection module collects the luminous flux of diffuse transmission light on the integrating sphere, thereby indirectly obtaining the transmittance and haze of the measured product, while the direct transmission light collection module uses the luminous flux of direct transmission light at the light outlet port of the integrating sphere to indirectly obtain the clarity of the measured product. The specific structure of the haze meter can refer to the technical solution of patent application number CN201610681357.X, which discloses a clarity measurement device, including a first light source system, an imaging system and a first detector; the measured sample is arranged between the imaging system and the first detector or between the imaging elements of the imaging system, and the light source or the light outlet of the first light source system is imaged on 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 array array detector; However, in this technical solution, although a first detector is arranged at the first measuring window of the integrating sphere, and the outgoing light from the first measuring window is received and measured by the first detector, what the first detector can collect basically is the mixed light of the stray light and the original light of the direct transmitted light. It can be seen that it is impossible to collect the filtered light of the direct transmitted light after eliminating the stray light, and it is also impossible to separate the original light of the direct transmitted light. As a result, it can only be used to measure and compare the clarity of various samples with different scattering characteristics, but it is impossible to accurately calculate the clarity of the direct transmitted light according to the relevant luminous flux, that is, it is impossible to accurately measure the three major optical characteristic indicators of transmittance, haze and clarity at the same time. In addition, this technical solution cannot independently adjust the light input area in the optical path to optimize the measurement conditions of haze and transmittance, and it is also impossible to independently adjust the light input area in the optical path to improve the measurement conditions of clarity. When the optical path has to take into account the measurement of haze and transmittance as well as the measurement of clarity, the measurement errors in the same optical path will be accumulated and amplified, thereby affecting the overall measurement effect and accuracy. Summary of the invention

[0004] The purpose of the present invention is to provide a haze meter and a method for using the same, so that the haze meter can not only accurately measure the three major optical characteristic indicators of the product, namely, transmittance, haze and clarity, but also can separately or comprehensively adjust the light intake area for the measurement of haze and transmittance and the measurement of clarity in the optical path to reduce the cumulative measurement error.

[0005] The technical solution provided by the present invention is: a haze meter, comprising a light source, an integrating sphere, and a diffuse light collection module arranged on the outer peripheral surface of the integrating sphere for collecting the luminous flux of diffuse transmitted light, the light entrance end of the diffuse light collection module is connected with the integrating sphere, the light entrance port of the integrating sphere is provided with a first measuring aperture for adjusting the light entrance area of ​​the transmittance and haze, and further comprising a flat lens and a second measuring aperture for adjusting the light entrance area of ​​the clarity, the light source, the flat lens, the second measuring aperture, the first measuring aperture, the light entrance port of the integrating sphere, and the light exit port of the integrating sphere are coaxially arranged in sequence, and a light guide axis is formed, and the light guide axis is perpendicular to the light entrance axis of the diffuse light collection module;

[0006] A light guide and a circuit board are provided at the light outlet port of the integrating sphere. A first channel coaxially arranged with the light guide axis and a second channel arranged on one side of the first channel are provided through the light guide component. Both the light inlet and light outlet ports of the second channel are arc-shaped structures and are concentrically arranged 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 collecting element and a second collecting element. The first collecting element is arranged opposite to the light exit port of the first channel, and the second collecting element is arranged opposite to the light exit port of the second channel and spaced apart.

[0008] The above-mentioned haze meter also includes a light collecting tube, one end of which is an open end, the second measuring aperture is arranged on the open end of the light collecting tube, the light source and the flat lens are arranged in the light collecting tube, and the light source, the flat lens and the second measuring aperture are arranged in sequence.

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

[0010] In the above haze meter, threads are respectively provided on the inner circumferential surfaces of the first channel and the second channel.

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

[0012] In the above haze meter, the apertures of the light input and light output ports of the first channel are equal and are both smaller than the diameter of the middle portion of the first channel;

[0013] The apertures of the light input and light output ports of the second channel are both smaller than the diameter of the middle portion of the second channel.

[0014] In the above haze meter, the light guide component comprises a light entrance aperture, a guide light seat and a light exit aperture connected in sequence, the light exit aperture is spaced apart from the second collecting element, and the circuit board is connected to the guide light seat;

[0015] The light entrance aperture and the light exit aperture are both provided with circular holes, the guide light seat is penetrated 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] A first arc-shaped hole is also provided on the light entrance aperture, and a second arc-shaped hole is also provided on the light exit aperture. The inner arc radius of the second arc-shaped hole is equal to the outer arc radius of the first arc. The first arc-shaped hole, the second straight hole and the second arc-shaped hole are opposite to each other in sequence and are connected to form the second channel.

[0017] The above haze meter further comprises a fixing base, on which a support arm for external connection is provided, and on which a mounting through hole is provided, and the light guide component is passed through the mounting through hole and connected to the fixing base.

[0018] In the above-mentioned haze meter, the fixing seat is provided with at least three first connecting holes arranged around the mounting through hole, the light-guiding component is provided with a second connecting hole and a bolt assembly located in the second connecting hole, the number of the second connecting holes, the bolt assemblies and the first connecting holes is the same, and the three correspond to each other one by one; the aperture of the first connecting hole, the aperture of the second connecting hole and the outer contour diameter of the bolt assembly increase successively, and the bolt assembly is threadedly connected to the corresponding first connecting hole.

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

[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, and then a light guide component and a circuit board are set up at the light outlet port of the integrating sphere so that the first channel of the light guide component is coaxially arranged with the light guide axis;

[0021] The product to be measured is arranged on the side of the second measuring aperture facing the first measuring aperture, and the light-incoming areas of the second measuring aperture and the first measuring aperture are within a specified small angle range relative to the angle of the sample to be measured;

[0022] The luminous flux in the integrating sphere is collected by the scattered light collection module, the light guide component and the circuit board to calculate the haze, transmittance and clarity.

[0023] After adopting the above technical solution, the present invention has the following beneficial effects:

[0024] The light source of the present technical solution becomes a parallel light beam under the refraction of a flat lens. The parallel light beam first penetrates the second measuring aperture, which controls the light-incoming area for clarity measurement, and then penetrates the measured product to reach the first measuring aperture, which controls the light-incoming area for haze and transmittance measurement. In actual use, by replacing the first measuring aperture or the second measuring aperture of different specifications, the light-incoming area can be optimized according to the corresponding purpose. After the parallel light beam continues to pass through the first measuring aperture, it reaches the inside of the integrating sphere from the light entrance port of the integrating sphere and is output from the light exit port of the integrating sphere. The light beam trajectory extends from the light source to the light exit port of the integrating sphere to form the light guiding axis of the present device. The parallel light beam then reaches the light guiding component from the light exit port of the integrating sphere and becomes straight transmitted light. The straight transmitted light is separated by the light guiding component into the original light of the straight transmitted light and the filtered light of the straight transmitted light after eliminating stray light, and the original light and the filtered light are respectively guided to the circuit board, and the corresponding original light on the circuit board is passed through the original light on the circuit board. The first light collecting element and the corresponding second light collecting element collect the luminous flux respectively, so as to indirectly and accurately calculate the clarity of the product. When the light-guiding component guides the original light, the first channel on the light-guiding component takes the light-guiding axis as the reference, and the second channel takes the axis of the first channel as the reference, so that the two channels can accurately match the center positions of the light source, the flat-head mirror, the second measuring aperture and the first measuring aperture, thereby ensuring the effectiveness of the luminous flux of the original light and the filtered light and improving the collection accuracy. In the above process, the light in the parallel light beam that can penetrate the object and enter the integrating sphere is called the through light. After continuous reflection in the integrating sphere, the through light is collected by the scattered light collection module perpendicular to the light-guiding axis in the integrating sphere, so that the haze meter can not only accurately measure the three major optical characteristic indicators of the product's transmittance, haze and clarity at the same time, but also can adjust the light intake area separately or comprehensively for the measurement of haze and transmittance and the measurement of clarity in the optical path, so as to reduce the cumulative measurement error. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0028] Figure 4 1 is a schematic diagram of assembling the light entrance aperture, the guide light seat and the light exit aperture of Embodiment 1 of the present invention;

[0029] Figure 5 is a schematic diagram of the rear view structure of the guide light seat of embodiment 1 of the present invention;

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

[0031] Figure 7 It is a schematic diagram of the structure of the haze meter of Example 1 of the present invention.

[0032] Reference numerals: 1, fixing seat; 2, bolt assembly; 3, light entrance aperture; 4, circular hole; 5, light guide seat; 6, circuit board; 7, positioning pin; 8, light 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 gaskets; 23. Corrugated gaskets;

[0035] 31. first arc-shaped hole; 32. first convex edge;

[0036] 51, first bayonet; 52, boss; 53, second connecting hole; 54, sink; 55, second straight hole; 56, first straight hole; 57, second bayonet;

[0037] 61. A first collecting element; 62. A second collecting element;

[0038] 81. second arc-shaped hole; 82. second convex edge;

[0039] 101. light source; 102. measuring aperture; 103. product to be measured; 104. integrating sphere; 105. flat lens; 106. auxiliary light source; 107. diffuse light collection module. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods, but does not constitute any limitation to the present invention.

[0041] Embodiment 1:

[0042] like Figure 1-7As shown, the haze meter 10 comprises a light source 101, an integrating sphere 104 and a diffuse light collection module 107 disposed on the outer circumference of the integrating sphere 104 for collecting the luminous flux of diffuse transmitted light, the light entrance end of the diffuse light collection module 107 is connected to the integrating sphere 104, a first measuring aperture 102 for adjusting the light entrance area of ​​the transmittance and haze is provided on the light entrance port of the integrating sphere 104, and further comprises a flat lens 105 and a second measuring aperture 102 for adjusting the light entrance area of ​​the clarity, the light source 101, the flat lens 105, the second measuring aperture 102, the first measuring aperture 102, the light entrance port of the integrating sphere 104 and the light exit port of the integrating sphere 104 are coaxially arranged in sequence, and a light guiding axis is formed, and the light guiding axis is perpendicular to the light entrance axis of the diffuse light collection module 107;

[0043] A light guide and a circuit board 6 are provided at the light outlet port of the integrating sphere 104. A first channel coaxially arranged with the light guide axis and a second channel arranged on one side of the first channel are provided through the light guide component. Both the light inlet and light outlet ports of the second channel are arc-shaped structures and are concentrically arranged 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.

[0044] The circuit board 6 is provided with a first collecting element 61 and a second collecting element 62 . The first collecting element 61 is arranged opposite to the light exit port of the first channel, and the second collecting element 62 is arranged opposite to the light exit port of the second channel and spaced apart from each other.

[0045] The specific working principle is that the light source 101 is refracted into a parallel light beam by the flat lens 105. The parallel light beam first penetrates the second measuring aperture 102, which controls the light-incoming area for clarity measurement, and then penetrates the measured product 103 to reach the first measuring aperture 102, which controls the light-incoming area for haze and transmittance measurement. In actual use, by replacing the first measuring aperture 102 or the second measuring aperture 102 of different specifications, the light-incoming area can be optimized according to the corresponding purpose, and the parallel light beam After continuing to pass through the first measuring aperture 102, the light beam reaches the inside of the integrating sphere 104 from the light entrance port of the integrating sphere 104 and is output from the light exit port of the integrating sphere 104. The light beam trajectory extends from the light source 101 to the light exit port of the integrating sphere 104 to form the light guide axis of the device. The parallel light beam then reaches the light guide component from the light exit port of the integrating sphere 104 and becomes straight transmitted light. The straight transmitted light is separated by the light guide component into the original light of the straight transmitted light and the filtered light of the straight transmitted light after eliminating stray light, and the original light and the filtered light are guided to the circuit board 6 respectively. On the circuit board 6, the first collecting element 61 corresponding to the original light and the second collecting element 62 corresponding to the filtered light respectively collect the light flux, so as to indirectly and accurately calculate the clarity of the product. When the light guide component guides the original light, the first channel on the light guide component takes the light guide axis as the reference, and the second channel takes the axis of the first channel as the reference, so that the two channels can accurately match the center positions of the light source 101, the flat mirror, the second measuring aperture 102 and the first measuring aperture 102, ensuring the effectiveness of the light flux of the original light and the filtered light and improving the collection efficiency. Collection accuracy; in the above process, the light in the parallel light beam that can penetrate the object and enter the integrating sphere 104 is called the through light. The through light is continuously reflected in the integrating sphere 104 and is collected by the scattered light collection module 107 perpendicular to the light guide axis in the integrating sphere 104, so that the haze meter 10 can not only accurately measure the three major optical characteristic indicators of the product's transmittance, haze and clarity at the same time, but also can separately or comprehensively adjust the light intake area for the measurement of haze and transmittance and the measurement of clarity in the optical path to reduce the cumulative measurement error.

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

[0047] In another preferred embodiment, an auxiliary light source 106 emitting light inward is further provided on the side of the light collecting tube.

[0048] The light-guiding component is provided with two independent channels, namely the first channel and the second channel. Two independent optical paths are constructed through the two channels to avoid mutual interference and mixing between the original light of the collected direct transmitted light and the filtered light of the direct transmitted light after eliminating stray light. The light outlet port of the first channel faces the first collecting element 61 on the circuit board 6. After the direct transmitted light enters the interior of the first channel, it reaches the first collecting element 61 under the guidance of the first channel. The first collecting element 61 collects the luminous flux of the original light of the direct transmitted light. The light inlet port and the light outlet port of the second channel are both arc-shaped structures, and 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 second channel, so that the second channel has the function of eliminating stray light. The effect of stray light is that after the direct transmitted light enters the second channel, it becomes filtered light after eliminating the stray light and is outputted from the light output port of the second channel. The light output end of the second channel faces the second collecting element 62 on the circuit board 6. The second collecting element 62 collects the luminous flux of the filtered light of the direct transmitted light after eliminating the stray light. The light output port of the second channel and the second collecting element 62 are spaced apart to ensure that the second collecting element 62 collects the filtered light of the direct transmitted light after eliminating the stray light, so as to independently collect the luminous flux of the original light of the direct transmitted light and the filtered light of the direct transmitted light after eliminating the stray light, thereby providing accurate data for calculating the clarity of the product 103 under test.

[0049] In practical applications, the specific clarity detection calculation formula is: C% = (Mm) / (M + m) * 100%, where M and m represent the maximum and minimum light fluxes passing through the moving grating, and M and m can also be expressed as direct transmission and scattered transmission light fluxes; according to the above formula, this embodiment collects the light flux of the original light of the direct transmission light and the filtered light of the direct transmission light after eliminating stray light, so as to provide the light flux of the direct transmission light required for calculating clarity.

[0050] As a further improvement, threads are respectively provided on the inner circumferences of the first channel and the second channel.

[0051] The arrangement of the above-mentioned threads enables the first channel and the second channel to eliminate the effect of stray light through thread enhancement.

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

[0053] In this embodiment, four second channels are provided in a circular array surrounding the axis of the first channel, that is, they are arranged around the first channel, so as to obtain the corresponding filtering at each location of the direct transmission light speed, so as to increase the collection sample capacity and improve the collection tolerance and accuracy.

[0054] In a specific implementation, the apertures of the light input and light output ports of the first channel are equal and both smaller than the diameter of the middle portion of the first channel; the apertures of the light input and light output ports of the second channel are both smaller than the diameter of the middle portion of the second channel.

[0055] In another preferred embodiment, the light exit port of the first channel is spaced apart from the first collecting element 61 .

[0056] The specific structure of the light guide component is that the light guide component includes a light entrance aperture 3, a guide light seat 5 and a light exit aperture 8 connected in sequence, the light exit aperture 8 is spaced apart from the second collecting element 62, and the circuit board 6 is connected to the guide light seat 5;

[0057] The light entrance aperture 3 and the light exit aperture 8 are both provided with circular holes 4, and the guide light seat 5 is penetrated 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] A first arc hole 31 is also provided on the light entrance aperture 3, and a second arc hole 81 is also provided on the light exit aperture 8. The inner arc radius of the second arc hole 81 is equal to the outer arc radius of the first arc. The first arc hole 31, the second straight hole 55 and the second arc hole 81 are opposite to each other in sequence and are connected to form a second channel.

[0059] In this embodiment, the aperture of the circular hole 4 is smaller than the aperture of the first straight hole 56 , the apertures of both the first arc hole 31 and the second arc hole 81 are smaller than the aperture of the second straight hole 55 , and the threads in the first channel and the second channel are specifically arranged on the inner circumferential surfaces of the first straight hole 56 and the second straight hole 55 .

[0060] In specific applications, the light entrance aperture 3 and the light exit aperture 8 are both made of stainless steel, and are both subjected to blackening surface treatment on the outer surface; the guide light seat 5 is made of aluminum, and is subjected to matte black treatment by anodizing, so that the guide light seat 5 has the functional effects of heat dissipation and elimination of stray light; the end face of the collecting element on the circuit board 6 is spaced 1 mm from the light exit aperture 8, that is, the distance between the first collecting element 61 and the light exit port of the first channel is 1 mm, and the distance between the second collecting element 62 and the second arc hole 81 is 1 mm.

[0061] In specific use, the directly transmitted light enters the first channel and the second channel which are jointly formed by the light entrance aperture 3, the guide light seat 5 and the exit aperture, and four second channels are arranged around the first channel. The light entrance and light exit ports of each second channel adopt an arc structure and are staggered with each other. The directly transmitted light enters four separate second channels to eliminate stray light again. Among them, 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 for adjusting the coaxiality of the axis of the first channel and the output axis of the integrating sphere 104, or the axis of the first channel and the axis of the directly projected light beam.

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

[0063] Preferably, a boss 52 facing the light entrance aperture 3 is provided on the guide light seat 5 , 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 a 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 to avoid obstructing the light from passing through the first straight hole 56 and the second straight hole 55. The arrangement 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 increases.

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

[0066] As a further improvement, positioning protrusions are respectively provided on the edges of the light entrance aperture 3 and the light exit aperture 8, and positioning slots corresponding to the two positioning protrusions are opened on the guide light seat 5, and the positioning protrusions are clamped in the corresponding positioning slots.

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

[0068] The arrangement of the first convex edge 32 and the first bayonet 51 enables the light entrance aperture 3 to be connected to the guide light seat 5 (specifically connected to the end face of the boss 52) by the first convex edge 32 being clamped in the first bayonet 51 (specifically arranged at the edge of the boss 52) for circumferential positioning, which can not only play a fool-proof effect when assembling the light entrance aperture 3 and the guide light seat 5, but also ensure that after the light entrance aperture 3 and the guide light seat 5 are connected, the circular hole 4 on the light entrance aperture 3 faces the first straight hole 56 on the guide light seat 5, and the first arc hole 31 of the light entrance aperture 3 faces the second straight hole 55 on the guide light seat 5, thereby improving the installation accuracy.

[0069] Preferably, the first bayonet 51 is a notch at the edge of the boss 52, and the first bayonet 51 passes through the side of the boss 52; a sink 54 is provided on the end face of the boss 52, and the light entrance aperture 3 is connected to the sink 54, and the first bayonet 51 connects the sink 54 and the outer side of the side of the boss 52.

[0070] In some embodiments, a second protrusion 82 (i.e., a positioning protrusion on the light exit aperture 8 ) is provided on the edge of the light exit aperture 8 , a second bayonet 57 (i.e., a second positioning bayonet on the guide light seat 5 ) is provided in the recess, and the second protrusion 82 is clamped in the second bayonet 57 .

[0071] Similarly, the arrangement of the second convex edge 82 and the second bayonet 57 enables the light diaphragm 8 to be connected to the guide light seat 5 (specifically connected to the bottom end surface of the recessed platform) by being clamped in the second bayonet 57 (specifically arranged in the recessed platform) through the second convex edge 82 for circumferential positioning, which can not only play a fool-proof effect when assembling the light diaphragm 8 and the guide light seat 5, but also ensure that after the light diaphragm 8 is connected to the guide light seat 5, the circular hole 4 on the light diaphragm 8 faces the first straight hole 56 on the guide light seat 5, and the first arc hole 31 of the light diaphragm 8 faces 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 protrusion 82 .

[0073] In some implementations, structures such as protrusions, bumps, plugs or terminals may be used as replacement positioning structures, and this embodiment does not impose too many restrictions on this.

[0074] In other embodiments, the first convex edge 32 may be provided on the boss 52 in addition to being provided on the light entrance aperture 3. Correspondingly, when the first convex edge 32 is provided on the boss 52, the first bayonet 51 is opened at the edge of the light entrance aperture 3. Similarly, the second convex edge 82 may be provided in the recessed platform in addition to being provided on the light exit aperture 8. Correspondingly, when the second convex edge 82 is provided in the recessed platform, the second bayonet 57 is provided at the edge of the light exit aperture 8. This embodiment does not impose too many restrictions on this.

[0075] Preferably, a recess facing the circuit board 6 is provided on the guide light seat 5, the circuit board 6 fits the guide light seat 5 to close the recess, the light exit aperture 8 is connected in the recess, and the first collection element 61 and the second collection element 62 are both provided in the recess.

[0076] The setting of the recessed platform enables the guide light seat 5 and the circuit board 6 to be connected in a fitting manner, and the two together enclose a cavity located in the guide light seat 5, and the light exit aperture 8, the first collecting element 61 and the second collecting element 62 are all arranged in the cavity. Placing the light exit aperture 8, the first collecting element 61 and the second collecting element 62 in a closed space can prevent dust and fine particles from falling on the first collecting element 61 and the second collecting element 62, and keep the direct transmitted light free of impurities and shadow interference from impurities during collection to avoid affecting the collected data. It can also prevent the light exit aperture 8, the first collecting element 61 and the second collecting element 62 from being affected by the collection accuracy or being damaged due to contact with the outside world.

[0077] Another improvement of the present embodiment further comprises a fixing base 1 , on which a support arm 11 for external connection is provided, and on which a mounting through hole 12 is also provided, and the light guide component is passed through the mounting through hole 12 and connected to the fixing base 1 .

[0078] In this embodiment, a fixing base 1 is provided, and the fixing base 1 is used as a fixing carrier of 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 through the support arm 11 on the fixing base 1, so that the light guide component can receive the direct transmitted light output by the integrating sphere 104 on the haze meter 10, or the direct transmitted light output by the integrating sphere 104. The specific structure of the support arm 11 can be adjusted or replaced according to different external objects, and this embodiment does not impose too many restrictions on the specific structure of the support arm 11.

[0079] In a specific implementation, the specific connection method between the support arm 11 and the fixed seat 1 is a bolt connection. A positioning pin 7 is provided between the support arm 11 and the fixed seat 1. The positioning pin 7 is respectively inserted into the support arm 11 and the fixed seat 1. 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 ​​connection and adhesion instead of bolt connection. This embodiment does not impose too many restrictions on this.

[0080] In this embodiment, two supporting arms 11 are provided and are disposed on two opposite sides of the fixing base 1 . The structures of the two supporting arms 11 may be the same or different, and this embodiment does not impose too many restrictions on this.

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

[0082] In this embodiment, at least three first connection holes 13, second connection holes 53 and bolt assemblies 2 are all provided, and the number of all of them is the same. Taking the provision of three as an example, the first connection holes 13, the second connection holes 53 and the bolt assemblies 2 jointly construct a three-point positioning connection with the center of the installation through hole 12 as the center, and the light guide component is fixed at the center of the installation through hole 12. In particular, since the aperture of the second connection hole 53 is larger than the aperture of the first connection hole 13, the light guide seat 5 and the fixing seat 1 can be assembled using the first connection hole 13. The aperture difference between the first connection hole 13 and the second connection hole 53 is offset (that is, the first connection hole 13 and the second connection hole 53 are not coaxially arranged), so as to adjust the relative position of the guide light seat 5 on the fixed seat 1 (the specific adjustment process is the relative translation of the light guide component on the fixed seat 1), and the first channel of the light guide component can be adjusted to be coaxial with the mounting through hole 12 according to actual needs, and the first channel of the light guide component can also be adjusted to be coaxial with the direct transmitted light according to actual needs, and the accuracy of the coaxiality of the light guide component on the fixed seat 1 is less than or equal to um.

[0083] In this embodiment, the second connecting hole 53 is arranged on the guide light seat 5, and the first connecting hole 13, the second connecting hole 53 and the bolt assembly 2 are all set to four, and are all centrally symmetrically arranged with the center of the mounting through hole 12. The four connecting bolts 21 pass through the corresponding second connecting holes 53 on the guide light seat 5 and are locked in the first connecting holes 13 on the fixed seat 1. When the four connecting bolts 21 are not locked, the light guide component is in a state of translational adjustment and can be adjusted in real time according to assembly requirements.

[0084] The specific structure of the bolt assembly 2 is, including a connecting bolt 21 and a connecting gasket 22 sleeved on the connecting bolt 21, the connecting bolt 21 is passed through the second connecting hole 53 and is threadedly connected to the first connecting hole 13, the outer diameter of the connecting gasket 22 is larger than the hole diameter of the second connecting hole 53, and the connecting gasket 22 is clamped 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 larger than the aperture 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, thereby eliminating the need for the connecting gasket 22.

[0086] In some embodiments, a corrugated gasket 23 is sleeved on the connecting bolt 21 and is located between the connecting gasket 22 and the head of the connecting bolt 21 to expand between the head of the connecting bolt 21 and the connecting gasket 22 and to press the connecting gasket 22 against the guide light seat 5 .

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

[0088] The light source 101, the flat lens 105, the second measuring aperture 102, the first measuring aperture 102 and the integrating sphere 104 are sequentially arranged along the light guide axis, and then the light guide component and the circuit board 6 are set up at the light outlet 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 103 to be measured is arranged on the side of the second measuring aperture 102 facing the first measuring aperture 102, and the light-incoming areas of the second measuring aperture 102 and the first measuring aperture 102 are within a specified small angle range relative to the angle of the sample to be measured;

[0090] The luminous flux in the integrating sphere 104 is collected by the scattered light collection 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 implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in 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 collection module (107) disposed on the outer peripheral surface of the integrating sphere (104) for collecting the light flux of diffuse light, wherein the light incident end of the diffuse light collection 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 (102) for adjusting the light incident area of ​​the transmittance and haze, characterized in that: It also comprises a flat lens (105) and a second measuring aperture (102) for adjusting the light intake area of ​​clarity, wherein the light source (101), the flat lens (105), the second measuring aperture (102), the first measuring aperture (102), the light input port of the integrating sphere (104) and the light output port of the integrating sphere (104) are coaxially arranged in sequence and form a light guide axis, and the light guide axis is perpendicular to the light input axis of the diffuse light collection module (107); A light guide part and a circuit board (6) are provided at the light outlet port of the integrating sphere (104); a first channel coaxially arranged with the light guide axis and a second channel arranged on one side of the first channel are provided through the light guide part; both the light inlet and light outlet ports of the second channel are arc-shaped structures and are coaxially arranged 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; The circuit board (6) is provided with a first collecting element (61) and a second collecting element (62); the first collecting element (61) is arranged opposite to the light exit port of the first channel, and the second collecting element (62) is arranged opposite to the light exit port of the second channel and spaced apart.

2. The haze meter according to claim 1, characterized in that It also includes a light collecting tube, one end of which is an open end, the second measuring aperture (102) is arranged on the open end of the light collecting tube, the light source (101) and the flat lens (105) are arranged in the light collecting tube, and 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 An auxiliary light source (106) emitting light inwards is also provided on the side of the light collecting tube.

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

5. The haze meter according to claim 1, characterized in that There are at least two second channels, which are arranged in a circular array with the axis of the first channel as the center. The number of the second collecting elements (62) and the second channels is the same, and they are arranged one by one opposite to each other.

6. The haze meter according to claim 1, characterized in that The apertures of the light input port and the light output port of the first channel are equal and are both smaller than the diameter of the middle portion of the first channel; The apertures of the light input and light output ports of the second channel are both smaller than the diameter of the middle portion of the second channel.

7. The haze meter according to any one of claims 4 to 6, characterized in that: The light guide component comprises a light entrance aperture (3), a light guide seat (5) and a light exit aperture (8) which are connected in sequence, the light exit aperture (8) and the second collecting element (62) are arranged at intervals, and the circuit board (6) is connected to the light guide seat (5); The light entrance aperture (3) and the light exit aperture (8) are both 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 entrance aperture (3) is also provided with a first arc-shaped hole (31), and the light exit 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 opposite to each other in sequence and are connected to form the second channel.

8. The haze meter according to any one of claims 4 to 6, characterized in that: It also comprises a fixing seat (1), the fixing seat (1) being provided with a support arm (11) for external connection, the fixing seat (1) being provided with a mounting through hole (12), the light guide component being passed through the mounting through hole (12) and being connected to the fixing seat (1).

9. The haze meter according to claim 8, characterized in that The fixing seat (1) is provided with at least three first connection holes (13) arranged around the mounting through hole (12); the light guide component is provided with a second connection hole (53) and a bolt assembly (2) located in the second connection hole (53); the number of the second connection holes (53), the bolt assembly (2) and the first connection hole (13) is the same, and the three are in one-to-one correspondence with each other; the aperture of the first connection hole (13), the aperture of the second connection hole (53) and the outer contour diameter of the bolt assembly (2) increase successively, and the bolt assembly (2) is threadedly connected to the corresponding first connection hole (13).

10. A method for measuring a haze meter, comprising the haze meter according to any one of claims 1 to 9, characterized in that: include: 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, and then a light guide component and a circuit board (6) are set up at the light outlet port of the integrating sphere (104) so ​​that the first channel of the light guide component is coaxially arranged with the light guide axis; The product to be measured (103) is arranged on a side of the second measuring aperture (102) facing the first measuring aperture (102), and the light-incoming areas of the second measuring aperture (102) and the first measuring aperture (102) are within a specified small angle range relative to the angle of the sample to be measured; The light flux in the integrating sphere (104) is collected by the scattered light collection module, the light guide component (5) and the circuit board (6) to calculate the haze, transmittance and clarity.

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