Method and system for optical analysis of components of aerosol generating articles

Abstract

This invention relates to a method for optically analyzing a component of an aerosol-generating article, the method comprising: – providing a component of an aerosol-generating article defining a first end and a second end, the component comprising: ○ an aerosol-forming matrix; ○ a sensor in thermal contact with the aerosol-forming matrix; – providing a first polarization camera, the first polarization camera including a sensor for detecting polarization information of electromagnetic radiation; – irradiating the component with electromagnetic radiation; – detecting electromagnetic radiation transmitted, reflected, or refracted from the component by the first polarization camera; – generating a first image of the first end of the component by the first polarization camera, the first image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information with respect to the detected electromagnetic radiation; and – detecting the position of the sensor in the first image.

Description

Technical Field

[0001] This invention relates to a method and system for optical analysis of components of aerosol-generating articles. Specifically, the method and system are adapted to detect the location of receptors contained in components of aerosol-generating articles. Background Technology

[0002] Aerosol generating apparatuses, including an aerosol forming matrix and an induction heating device, are known. The induction heating device includes an induction source that generates an alternating electromagnetic field, which induces eddy currents and hysteresis losses in a sensor. The sensor is in thermal proximity to the aerosol forming matrix, such as a tobacco matrix. The heated sensor then heats the aerosol forming matrix, which comprises a material capable of releasing volatile compounds that can form aerosols.

[0003] In some components, the receptor is located inside the aerosol-generating article, which also contains an aerosol-forming matrix.

[0004] Due to manufacturing tolerances, it is possible for a sensor in a component to be not in the desired location or to be not properly oriented.

[0005] If the receptor is held in the wrong position or orientation, a lack of product consistency may result in aerosol delivery when the component is used in an aerosol generation device. Summary of the Invention

[0006] Therefore, it is desirable to detect such defects as early as possible to ensure that only compatible parts are produced and to avoid unnecessary costs and waste.

[0007] On one hand, the present invention relates to a method for optical analysis of a component of an aerosol-generating article. The method includes providing a component of an aerosol-generating article defining a first end and a second end, wherein the component includes: an aerosol-forming matrix; and a sensor in thermal contact with the aerosol-forming matrix. The method preferably further includes providing a first polarization camera, the first polarization camera including a sensor that detects polarization information of electromagnetic radiation. The method may include irradiating the component with electromagnetic radiation. The method may include detecting electromagnetic radiation transmitted, refracted, or reflected from the component by the first polarization camera. The method may include generating a first image of a first end of the component by the first polarization camera, the first image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information with respect to the detected electromagnetic radiation. Furthermore, the method includes detecting the position of the sensor in the first image.

[0008] In another aspect, the present invention relates to a system for producing a component of an aerosol-generating article, wherein the component includes: a longitudinal axis; a first end and a second end; an aerosol-forming matrix; and a sensor in thermal contact with the aerosol-forming matrix. The system further includes a first electromagnetic radiation source adapted to irradiate the component. The system also includes a first polarization camera, the first polarization camera including a sensor for detecting polarization information of the electromagnetic radiation, the first polarization camera defining a first field of view, the first polarization camera being arranged such that the first end of the component is within the first field of view, the first polarization camera being adapted to generate a first image of the first end of the component, the first image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information of the electromagnetic radiation detected by the camera. The system may further include a control unit adapted to process the first image and detect the position of the sensor in the first image.

[0009] It has been found that images of the ends of components of aerosol-generated articles, including those with receptors, taken with a polarizing camera, improve the visibility of the receptors' position in the image compared to images taken with any other camera. Checking the correct position of the receptors during the manufacturing of components of aerosol-generated articles allows for the removal of defective components as quickly as possible, thus limiting material waste. Polarizing cameras are fast enough to allow images to be processed during production.

[0010] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming matrix that releases volatile compounds capable of forming aerosols upon heating. Preferably, the aerosol-generating article is a heated aerosol-generating article. A heated aerosol-generating article is an aerosol-generating article comprising an aerosol-forming matrix intended to be heated rather than burned in order to release volatile compounds capable of forming aerosols. The aerosol-generating article may be a consumable, particularly a consumable to be discarded after a single use. The aerosol-generating article may be an article similar to conventional cigarettes, particularly tobacco products.

[0011] As used herein, the term "aerosol forming matrix" refers to a matrix formed by or comprising an aerosol forming material that, upon heating, releases volatile compounds to generate aerosols. The aerosol forming matrix may contain tobacco material, or may contain non-tobacco material, or a combination of both. The aerosol forming matrix may be a nicotine-impregnated cellulose material, preferably comprising one or more flavoring agents. Advantageously, the aerosol forming matrix comprises tobacco material, preferably homogenized tobacco material, which preferably comprises one or more aerosol forming agents. As used herein, the term "homogenized tobacco material" refers to material formed by agglomerating particulate tobacco.

[0012] Preferably, the aerosol forming matrix contains volatile tobacco aroma compounds released from the aerosol forming matrix upon heating. The aerosol forming matrix may include or consist of a mixture of tobacco shreds and fillers, or may include homogenized tobacco material. The homogenized tobacco material may be formed by agglomerating particulate tobacco. The aerosol forming matrix may additionally include tobacco-free materials, such as homogenized plant-based materials other than tobacco.

[0013] Preferably, the aerosol-formed tobacco matrix is ​​a tobacco sheet, preferably a rolled one, comprising tobacco material, fibers, binder, and aerosol forming agent. More preferably, the tobacco sheet is a cast leaf. A cast leaf is a form of reconstituted tobacco formed from a pulp containing tobacco particles, fiber particles, an aerosol forming agent, binder, and, for example, a flavoring agent.

[0014] Depending on the required sheet thickness and mold gap, the tobacco particles can be in the form of tobacco dust, having particles ranging from about 30 micrometers to 250 micrometers, preferably from about 30 micrometers to 80 micrometers or 100 micrometers to 250 micrometers, wherein the mold gap typically defines the sheet thickness. The size of the tobacco particles refers to the Dv95 size in their volume distribution.

[0015] Fiber particles may include tobacco stem material, stalks or other tobacco plant material, as well as other cellulose-based fibers such as wood fibers with low lignin content. The fiber particles can be selected based on the expectation of producing sufficient tensile strength for cast leaves relative to a low impurity rate (e.g., an impurity rate between approximately 2% and 15%). Alternatively, fibers such as plant fibers may be used with the aforementioned fiber particles, or, as an alternative, bamboo may be included.

[0016] Aerosol forming agents, including those in the slurry forming the cast leaf or used in other aerosol forming matrices, can be selected based on one or more properties. Functionally, the mechanism provided by the aerosol forming agent allows it to volatilize when heated above its specific volatilization temperature and deliver nicotine or flavoring, or both, in the aerosol. Different aerosol forming agents typically vaporize at different temperatures. An aerosol forming agent can be any suitable known compound or mixture of compounds that promotes the formation of a dense and stable aerosol in use and is substantially resistant to thermal degradation at the operating temperature of the induction heating device with which the induction-heated tobacco matrix will be used. Aerosol forming agents can be selected based on, for example, their ability to remain stable at or near room temperature but to volatilize at higher temperatures, such as between 40°C and 450°C.

[0017] Aerosol forming agents can also possess wetting agent properties, which help maintain desired levels of moisture in the aerosol forming matrix when the matrix is ​​composed of tobacco-based products that specifically include tobacco particles. Specifically, some aerosol forming agents are hygroscopic materials that act as wetting agents, i.e., materials that help keep the tobacco substrate containing the wetting agent moist.

[0018] One or more aerosol forming agents can be combined to utilize one or more properties of the combined aerosol forming agents. For example, triacetin can be combined with glycerol and water to utilize the ability of triacetin to deliver the active ingredient and the wetting properties of glycerol.

[0019] The aerosol forming agent may be selected from polyols, glycol ethers, polyol esters, esters, and fatty acids, and may include one or more of the following compounds: glycerol, erythritol, 1,3-butanediol, tetraethylene glycol, triethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triacetin, meso erythritol, a mixture of diacetins, diethyl octanoate, triethyl citrate, methyl benzoate, methyl phenylacetate, ethyl vanillate, glyceryl tribanoate, lauryl acetate, lauric acid, myristic acid, and propylene glycol.

[0020] The aerosol forming matrix may include other additives and ingredients, such as flavorings. Preferably, the aerosol forming matrix includes nicotine and at least one aerosol forming agent.

[0021] The thickness of the curled tobacco sheet (e.g., cast leaf) can range from about 0.5 mm to about 2 mm, preferably from about 0.8 mm to about 1.5 mm, for example, 1 mm. Due to manufacturing tolerances, thickness deviations of up to about 30% may occur.

[0022] The aerosol forming matrix may include a gel. The aerosol forming matrix may include a porous medium filled with gel. The porous medium forms a matrix for adsorbing the gel. The gel is inserted into a component used in an aerosol generating article.

[0023] In conjunction with a specific embodiment, the gel is a mixture of materials capable of releasing volatile compounds, preferably when the gel is heated, into an aerosol passing through the aerosol-generated article. Advantageously, the gel is solid at room temperature. In this context, "solid" means that the gel has a stable size and shape and does not flow. In this context, room temperature means 25 degrees Celsius.

[0024] The gel may include an aerosol forming agent. Ideally, the aerosol forming agent is substantially resistant to thermal degradation at the operating temperature of the component. Suitable aerosol forming agents are well known in the art and include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as mono, di, or triacetic acid esters of glycerol; and fatty acid esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. The polyol or mixture thereof may be one or more of triethylene glycol, 1,3-butanediol, and glycerol or polyethylene glycol.

[0025] Advantageously, gels include, for example, thermotropic reversible gels. This means that the gel becomes a fluid when heated to its melting temperature and reverts to a gel at its gelation temperature. The gelation temperature can be at or above room temperature and atmospheric pressure. Atmospheric pressure means 1 atmosphere. The melting temperature can be higher than the gelation temperature. The melting temperature of the gel can be above 50 degrees Celsius, or 60 degrees Celsius, or 70 degrees Celsius, and can be above 80 degrees Celsius. In this context, melting temperature means the temperature at which the gel ceases to be solid and begins to flow.

[0026] Alternatively, in specific embodiments, the gel is a non-melting gel that does not melt during use of the component. In these embodiments, the gel may release the active agent at least partially during use at a temperature at or above the operating temperature of the tubular element but below the melting temperature of the gel.

[0027] In specific embodiments, the gel includes a gelling agent. In a particular embodiment, the gel comprises agar or agarose or sodium alginate or gellan gum, or a mixture thereof.

[0028] In a specific embodiment, the gel contains water; for example, the gel is a hydrogel.

[0029] Alternatively, in a specific embodiment, the gel is non-aqueous.

[0030] Preferably, the gel contains an active agent. In specific embodiments, the active agent contains nicotine (e.g., in powder or liquid form) or a tobacco product or another target compound for release, for example, in an aerosol. In a specific embodiment, nicotine is contained in a gel having an aerosol-forming agent.

[0031] In a specific embodiment, the gel comprises a solid tobacco material that releases flavor compounds when heated. Depending on the specific embodiment, the solid tobacco material is, for example, one or more of the following: powder, granules, pellets, shreds, spaghetti, strips, or sheets, containing one or more of the following: plant materials, such as grass leaves, tobacco leaves, tobacco ribs, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco.

[0032] Alternatively or additionally, there are embodiments in which, for example, the gel contains other flavorings, such as menthol. Menthol may be added to water or to the aerosol-forming agent prior to gel formation.

[0033] Preferably, the gel comprises a gelling agent. The gelling agent can form a solid medium in which an aerosol forming agent can be dispersed.

[0034] The gel may comprise any suitable gelling agent. For example, the gelling agent may comprise one or more biopolymers, such as two or three biopolymers. Preferably, in the case where the gel comprises more than one biopolymer, the biopolymers are present in substantially equal weights.

[0035] Biopolymers can be formed from polysaccharides. Suitable biopolymers for use as gelling agents include, for example, gellan gum (natural low-acyl gellan gum, high-acyl gellan gum, preferably low-acyl gellan gum), xanthan gum, alginate (alginic acid), agar, guar gum, etc. Preferably, the gel contains agar.

[0036] The gel may include divalent cations. Preferably, the divalent cations include calcium ions, such as calcium lactate in solution. Divalent cations (such as calcium ions) can help gel formation in compositions containing biopolymers (polysaccharides) such as gellan gum (natural, low-acyl gellan gum, high-acyl gellan gum), xanthan gum, alginate (alginic acid), agar, guar gum, etc. Ionic effects can aid gel formation. Divalent cations may be present in the gel composition in the range of about 0.1% by weight to about 1% by weight or about 0.5% by weight. In some embodiments, the gel does not include divalent cations.

[0037] The gel may include a carboxylic acid. The carboxylic acid may contain a ketone group. Preferably, the carboxylic acid contains a ketone group having fewer than 10 carbon atoms. Preferably, the carboxylic acid has five carbon atoms (e.g., purpuric acid). Alecithin may be added to the neutralized pH of the gel. This also helps gel formation in compositions containing biopolymers (polysaccharides) such as gellan gum (low-acyl gellan gum, high-acyl gellan gum), xanthan gum, especially alginate (alginic acid), agar, guar gum, etc. Alecithin may also enhance the sensory profile of the gel formulation. In some embodiments, the gel does not include a carboxylic acid.

[0038] Preferably, the gel also contains between 0.1% and 2% wt% nicotine. Preferably, the gel also contains between 30% and 90% wt% (or between 70% and 90% wt%) glycerin. In a specific embodiment, the remainder of the gel comprises water and flavoring agents.

[0039] Alternatively or concurrently, in some embodiments, the aerosol forming matrix comprises a porous medium filled with gel. The gel is adsorbed by the porous medium, which acts as the matrix for the gel.

[0040] As used herein, the term "aerosol generating apparatus" describes an apparatus that interacts with an aerosol-forming matrix of an aerosol generating article to generate an aerosol. Preferably, the aerosol generating apparatus is a suction device that interacts with the aerosol-forming matrix of the aerosol generating article to generate an aerosol that can be directly inhaled by a user through the user's mouth.

[0041] The term "component" in the context of an aerosol-generating article refers to an element used to form the aerosol-generating article. Preferably, the component may be rod-shaped. Preferably, the component is substantially cylindrical. In a specific embodiment, the outer diameter of the component is between 5 mm and 12 mm, for example, between 5 mm and 10 mm, or between 6 mm and 8 mm. Typically, the outer diameter of the component is 7.2 mm ± 10%. Preferably, the component is surrounded by wrapping paper. Typically, the length of the component is between 5 mm and 15 mm. Preferably, the length of the component is between 6 mm and 12 mm, more preferably, the length of the component is between 7 mm and 10 mm, and most preferably, the length of the component is 8 mm.

[0042] As used herein, the term "receptor" refers to a material capable of converting electromagnetic energy into heat. When located in an alternating electromagnetic field, eddy currents are induced, and hysteresis losses occur in the receptor, causing it to heat up. When the receptor is positioned in thermal contact or close thermal proximity with the aerosol-forming matrix, the aerosol-forming matrix is ​​heated by the receptor, resulting in the formation of an aerosol. Preferably, the receptor is arranged in direct physical contact with the aerosol-forming matrix, for example, within an aerosol-forming tobacco matrix.

[0043] The receptor can be formed from any material capable of being inductively heated to a temperature sufficient to generate aerosols from the aerosol-forming matrix. Preferred receptors include metals or carbon. Preferred receptors may include or be composed of ferromagnetic materials, such as ferromagnetic alloys, ferritic iron, or ferromagnetic steel or stainless steel. Suitable receptors may be aluminum or include aluminum. Preferred receptors can be heated to temperatures exceeding 250 degrees Celsius. Suitable receptors may include a non-metallic core having a metallic layer disposed on the non-metallic core, such as metallic traces formed on the surface of a ceramic core. The receptor may have an outer protective layer, such as a ceramic or glass protective layer encapsulating the receptor. The receptor may include a protective coating formed of glass, ceramic, or an inert metal, which is formed on the core of the receptor material.

[0044] The receptor can be a multi-material receptor and may include a first receptor material and a second receptor material. The first receptor material is disposed in close physical contact with the second receptor material. The second receptor material preferably has a Curie temperature below 500°C. The first receptor material is preferably primarily used to heat the receptor when it is placed in a fluctuating electromagnetic field. Any suitable material can be used. For example, the first receptor material can be aluminum, or it can be an iron-containing material, such as stainless steel. The second receptor material is preferably primarily used to indicate when the receptor has reached a specific temperature, which is the Curie temperature of the second receptor material. The Curie temperature of the second receptor material can be used to regulate the temperature of the entire receptor during operation. Therefore, the Curie temperature of the second receptor material should be below the ignition point of the aerosol-forming matrix. Suitable materials for the second receptor material may include nickel and certain nickel alloys.

[0045] Preferably, the receptor is in the form of a filament, rod, sheet, or strip. If the receptor profile has a constant cross-section, such as a circular cross-section, it preferably has a width or diameter between about 1 mm and about 5 mm. If the receptor profile is in the form of a sheet or strip, the sheet or strip preferably has a rectangular shape, the rectangular shape having a width preferably between about 2 mm and about 8 mm, more preferably between about 3 mm and about 5 mm (e.g., 4 mm), and a thickness preferably between about 0.03 mm and about 0.15 mm, more preferably between about 0.05 mm and about 0.09 mm (e.g., 0.07 mm).

[0046] According to the method of the present invention, a component for generating an aerosol article is provided. The component preferably has a rod shape. Preferably, the component defines a longitudinal axis. The component defines a first end and a second end. The longitudinal axis connects the first end and the second end.

[0047] Preferably, the cross-section of the component along a plane perpendicular to its longitudinal axis is circular or elliptical. However, the component may also have a rectangular or polygonal cross-section.

[0048] Furthermore, the component includes an aerosol-forming matrix. The aerosol-forming matrix may include homogenized tobacco material. The aerosol-forming matrix may include a gel. The aerosol-forming matrix may include a matrix that adsorbs gels. Preferably, a majority of the component is formed of the aerosol-forming matrix. The aerosol-forming matrix preferably completely fills the component; that is, voids, cavities, and pores are not desired in the component.

[0049] The component further includes a receptor. Preferably, the receptor is made of metal. The receptor is in thermal contact with the aerosol-forming matrix. Thermal contact is created to heat the aerosol-forming matrix. Upon heating, the aerosol-forming matrix releases aerosols. Preferably, the receptor is surrounded by the aerosol-forming matrix. Preferably, the receptor defines a longitudinal axis. Preferably, the receptor is completely contained within the component. Preferably, the receptor is located near a first end of the component. Preferably, the receptor extends from the first end of the component to a second end. Preferably, the longitudinal axis of the receptor is parallel to or forms an angle of less than 20 degrees with the longitudinal axis of the component. Preferably, the receptor is inserted into the component. Preferably, the receptor is located at a given position within the component. Preferably, the receptor has a leaf-like shape.

[0050] Preferably, the component is wrapped in a packaging sheet.

[0051] The present invention also provides a first polarization camera including a sensor for detecting polarization information of electromagnetic radiation. The sensor preferably includes a polarizer array. Preferably, the polarizer array includes multiple polarization filters with different polarization angles. Preferably, the sensor includes a CMOS sensor. A polarization filter layer can be inscribed above a photodiode. The polarizer array layer can be placed on a chip and can include an air-gap nanowire grid coated with an anti-reflective material to suppress flicker and ghosting. This on-chip placement reduces polarization crosstalk and improves the extinction ratio.

[0052] The polarizer array may include four different directional polarization filters. A polarization filter can be placed on each pixel. Each polarization filter polarizes light along a polarization direction. Preferably, the four different polarization directions are at 90 degrees, 45 degrees, 135 degrees, and 0 degrees. Each block of the four pixels defines a computational unit. A sensor using polarizers with different directional polarizations in a four-pixel block design preferably allows for the calculation of both the degree of polarization and the direction of electromagnetic radiation.

[0053] The first polarization camera is preferably sensitive to electromagnetic radiation with wavelengths ranging from about 200 nanometers to about 2500 nanometers, and more preferably from 400 nanometers to 1000 nanometers.

[0054] Preferably, the first polarization camera is a polarization machine vision camera from the XCG-CP series manufactured by Sony. Preferably, the first polarization camera uses the XPL-SDKW polarization camera software development kit.

[0055] The component is irradiated, for example, by an electromagnetic radiation source that emits electromagnetic radiation. Preferably, the entire component is irradiated, or only a portion of the component is irradiated. Preferably, a first end of the component is irradiated by electromagnetic radiation. The electromagnetic radiation can be a focused beam of electromagnetic radiation. The electromagnetic radiation can be diffuse electromagnetic radiation. The electromagnetic radiation source preferably emits electromagnetic radiation having a wavelength range between about 200 nanometers and about 2500 nanometers, more preferably between 400 nanometers and 1000 nanometers. Preferably, the electromagnetic radiation has a wavelength in the visible range. Preferably, the electromagnetic radiation source includes an LED. The LED can be a white LED. Preferably, suitable optics can be included to focus the electromagnetic radiation onto the first end of the component. The electromagnetic radiation source is preferably positioned such that it can irradiate the first end of the component.

[0056] A first polarizing camera defines a field of view, and a component is positioned such that it is positioned or adapted to enter the field of view of the first polarizing camera. Preferably, the component is positioned such that it is positioned or adapted to enter the field of view of the first polarizing camera completely or partially. Preferably, the component is positioned such that its first end is positioned or adapted to enter the field of view of the first polarizing camera.

[0057] The field of view of the polarization camera has a central axis, which is the optical axis of the optical components included in the first polarization camera.

[0058] Electromagnetic radiation can be reflected, refracted, or transmitted by a component, for example, by a portion of the component. The portion of the component that can reflect, refract, or transmit electromagnetic radiation preferably includes a first end of the component. Some of this electromagnetic radiation from the component is incident on the sensor of a first polarization camera, causing the first polarization camera to detect it. Hereafter, "electromagnetic radiation from the component" means electromagnetic radiation that has been reflected, refracted, or transmitted by a portion of the component. The first polarization camera is adapted to generate a first image having multiple pixels. Each pixel of the first image contains polarization information of the detected electromagnetic radiation. Therefore, the first image contains polarization information of the electromagnetic radiation from the component.

[0059] For example, each pixel of an image can contain information about polarization along a given direction. This direction could be defined by one of the polarization filters contained in the camera's sensor. For example, a first image can be divided into clusters of four pixels along one of the four directions identified by the polarization filters, with each pixel in the cluster containing polarization information, such as a polarization value. Thus, a cluster of four pixels can contain polarization values ​​along four directions.

[0060] The first image may include refined polarization information. Different quantities can be calculated from polarization values ​​along one or more directions.

[0061] The first image can contain the degree of polarization (DOP) for each pixel. The degree of polarization for each pixel can be calculated and displayed as a polarization image. The degree of polarization (DOP) is a quantity used to describe the portion of electromagnetic radiation that is polarized. Fully polarized radiation has 100% DOP, while unpolarized radiation has 0% DOP. Partially polarized radiation, and therefore can be represented by a superposition of polarized and unpolarized components, has a DOP between 0% and 100%. DOP is typically calculated as the fraction of the total power carried by the polarized components of electromagnetic radiation.

[0062] The first image may contain information about the polarization value of each pixel along a single direction, with all pixels having the same orientation. This direction may be one of the polarization directions of a filter. The first polarization camera can generate four different images, one for each polarization direction defined by the polarization filters included in the camera sensor.

[0063] The first image may contain information about the polarization value of each pixel along a single direction, where all pixels are in the same direction, unlike all directions defined by the polarization filter. This first image is obtained by refining the polarization values ​​obtained by the sensor along different directions defined by the polarization filter.

[0064] The first image may contain polarization information for each pixel, including the average of polarization values ​​along multiple directions. For example, in the case of four different directions defined by four polarization filters, the first image may contain the average of the four polarizations for each pixel along the four different directions.

[0065] The first image can contain polarization information, including the polarization direction, for each pixel. This information can be processed and used to display a surface orthogonal image. The surface orthogonal image displays the direction orthogonal to the surface of the component in each pixel.

[0066] The location of the receptor can be identified based on the polarization information present in the first image. It is not easy to locate the receptor using a standard camera. Using the polarization information displayed in the first image, the location of the receptor within the component can be easily identified. The location of the receptor within the component can be easily identified. Preferably, the identification of the receptor's location is performed automatically using known image processing software or algorithms.

[0067] The location of the sensor is identified using, for example, a control unit, such as a computer. The control unit may include suitable software for digital image analysis.

[0068] If the receptor is covered by other materials such as gel, additional information from the refined first image can be used to determine the receptor's location. Furthermore, information about the receptor's size can be used to determine its location.

[0069] Additional information about the component can be obtained from a refined first image. For example, the diameter of the component at the first end can be measured.

[0070] Preferably, the method includes determining whether the position of the receptor is correct. Determining whether the position is correct preferably includes comparing the detected position of the receptor with the expected position of the receptor. Determining whether the position is correct preferably includes comparing the detected position of the receptor with a range of expected positions of the receptor. Preferably, the receptor is placed in the component such that it is completely surrounded by the aerosol-forming matrix. Furthermore, the receptor defines a receptor axis. Preferably, the receptor axis is substantially parallel to the longitudinal axis of the component. Therefore, if the receptor axis is not parallel to the longitudinal axis, the receptor is considered not correctly positioned. If the angle formed by the receptor axis and the longitudinal axis is greater than 20 degrees, the receptor is considered not correctly positioned.

[0071] Preferably, the method includes issuing a warning. If the sensor is incorrectly placed or misaligned, i.e., when the sensor is not in the correct position, the method preferably includes, for example, issuing a warning to the operator. Alternatively, the warning or alarm is sent to a feedback loop device. The feedback loop device can modify the sensor's positioning within the component based on the warning.

[0072] Preferably, the method includes evaluating one of the following from polarization information present in the first image: degree of polarization; or angle of polarization. More preferably, calculating one of the degree of polarization or angle of polarization for each pixel of the first image. More preferably, calculating both the degree of polarization and the angle of polarization. Thus, the first image may include either a DOP value or an angle of polarization value for each pixel. Preferably, the first image includes both the DOP value and the angle of polarization value for each pixel. The receptor can be implemented using metal. The polarization degree image enhances the contrast between objects made of metal and objects made of other materials because metal has a relatively higher degree of polarization for electromagnetic radiation. Locating the receptor and determining whether it is correctly positioned is relatively simple.

[0073] Preferably, the first polarization camera defines a first field of view having a first central axis; the method includes: providing a second polarization camera, the second polarization camera including a sensor for detecting polarization information of electromagnetic radiation, the second polarization camera defining a second field of view having a second central axis, the second central axis forming an angle other than zero with the first central axis; detecting electromagnetic radiation transmitted, reflected, or refracted from the component by the second polarization camera; generating a second image of a first end of the component by the second polarization camera, the second image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information with respect to the detected electromagnetic radiation; combining the polarization information contained in the first image with the polarization information contained in the second image to obtain a single combined image of the first end of the component. More preferably, the step of detecting electromagnetic radiation transmitted, reflected, or refracted from the component by the second polarization camera includes detecting electromagnetic radiation transmitted, reflected, or refracted from the first end of the component by the second polarization camera. Preferably, a second polarization camera is provided. The second polarization camera obtains a second image of the first end of the component. Preferably, the second polarization camera is substantially the same as the first polarization camera. The second polarization camera defines a second field of view having a second central axis. The angle formed between the first axis of the first field of view of the first polarizing camera and the second axis of the second field of view of the second polarizing camera is different from zero degrees or 180 degrees. Preferably, the polarization information contained in the first image and the polarization information contained in the second image are of the same type. For example, if the first image contains information about each pixel of the DOP, then the second image also contains information about the DOP. Preferably, the first image and the second image are captured substantially simultaneously. The angle formed between the first axis of the first field of view of the first polarizing camera and the second axis of the second field of view of the second polarizing camera allows the first image and the second image to be combined to obtain a basic three-dimensional image. Preferably, the angle formed between the first axis and the second axis is between about 5 degrees and about 60 degrees. To combine the first image and the second image, a stereo vision algorithm can be used. By comparing information about the component from two angles, three-dimensional information can be extracted by examining the relative positions of the components in the first image and the second image. The three-dimensional image allows for better identification of the position of the receptor in the aerosol-forming matrix. The three-dimensional image improves the recognizability of structures within the aerosol-forming matrix, thus making the receptor more visible.

[0074] Preferably, the method includes: providing an X-ray sensor; irradiating a component between a first end and a second end with X-rays; generating an X-ray image; and combining information contained in the X-ray image with information contained in a first image. A first polarization camera generates an image of the first end of the component. A polarization camera may not be able to generate an image of the interior of the component, but only an image of its surface. Therefore, it is impossible to detect defects inside the component that are not visible on the surface of the component using a polarization camera. To generate an image of the interior of the component, an X-ray sensor can be provided. The X-ray sensor detects the transmitted or reflected X-ray field incident on the component between the first end and the second end. The X-ray sensor is adapted to generate an X-ray image. This allows the detection of defects located inside the component and not visible on the surface of the component.

[0075] Preferably, the method includes: providing a third polarization camera, the third polarization camera including a sensor for detecting polarization information of electromagnetic radiation; detecting electromagnetic radiation transmitted, reflected, or refracted from the component by the third polarization camera; generating a third image of a second end of the component by the third polarization camera, the third image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information regarding the detected electromagnetic radiation; and detecting the position of the receptor in the third image. More preferably, the first image and the third image are generated substantially simultaneously. Further preferably, the step of irradiating the component with electromagnetic radiation includes irradiating a first end and a second end of the component with electromagnetic radiation. More preferably, the step of detecting electromagnetic radiation transmitted, reflected, or refracted from the component by the third polarization camera includes detecting electromagnetic radiation transmitted, reflected, or refracted from the first end of the component by the third polarization camera. In this way, the position of the receptor can be identified at the first end and the second end of the component. Misalignment of the receptor can be identified at both ends of the component. The presence of two polarization cameras (a first polarization camera and a third polarization camera) allows for simultaneous inspection of the first end and the second end, thereby reducing manufacturing time. This is also useful when there are two different receptors at two opposite ends of the component.

[0076] Preferably, the method includes: irradiating the component with first electromagnetic radiation; detecting, by a first polarization camera, the first electromagnetic radiation transmitted, reflected, or refracted from the component; generating a first image of a first end of the component, the first image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information about the detected first electromagnetic radiation; irradiating the component with second electromagnetic radiation different from the first electromagnetic radiation; detecting, by the first polarization camera, the second electromagnetic radiation transmitted, reflected, or refracted from the component; generating a fourth image of the first end of the component by the first polarization camera, the fourth image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information about the detected second electromagnetic radiation; and combining the polarization information contained in the first image with the polarization information contained in the fourth image to obtain a single combined image of the first end of the component.

[0077] Any characteristic of the first electromagnetic radiation can differ from that of the second electromagnetic radiation. For example, the second electromagnetic radiation may be diffuse, while the first electromagnetic radiation may be focused. The wavelength of the first electromagnetic radiation may differ from that of the second electromagnetic radiation. The angle at which the first electromagnetic radiation is incident on the first end of the component may differ from the angle at which the second electromagnetic radiation is incident on the first end of the component. Having two different light settings, such as the first electromagnetic radiation and the second electromagnetic radiation, allows for the use of the optimal electromagnetic radiation for a given analysis. For example, selecting the first electromagnetic radiation makes it easy to detect the location of the receptor in a first image, a fourth image, or a combined image, while selecting the second electromagnetic radiation makes it easy to detect another characteristic in the first image, the fourth image, or a combined image.

[0078] Preferably, the third polarization camera defines a third field of view having a third central axis; the method includes: providing a fifth polarization camera, the fifth polarization camera including a sensor for detecting polarization information of electromagnetic radiation, the fifth polarization camera defining a fifth field of view having a fifth central axis forming an angle other than zero with the third central axis; detecting electromagnetic radiation transmitted, reflected, or refracted from the component by the fifth polarization camera; generating a fifth image of a second end of the component by the fifth polarization camera, the fifth image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information of the detected electromagnetic radiation; and combining the polarization information contained in the third image with the polarization information contained in the fifth image to obtain a single combined image of the second end of the component. As in the first end, third and fifth images taken at different angles can be combined to obtain a basic three-dimensional image of the second end of the component.

[0079] Preferably, the components define a longitudinal axis, and the first polarization camera has a first field of view, and the method includes: providing a movable conveyor; providing a plurality of components whose longitudinal axes are substantially parallel to each other on the movable conveyor; generating a first image of a first end of some of the plurality of components that enter the first field of view of the first camera through the movement of the movable conveyor. Preferably, the components are moved. During the production of aerosol-generated articles, components are moved from one machine to another for manufacturing. In order to produce components within a limited amount of time, the position of the sensors is determined while the components are being moved, for example, while they are being processed. Manufacturing interruptions can be avoided or minimized. For this purpose, a moving element is provided, which is adapted to move a plurality of components whose longitudinal axes are arranged parallel to each other. The components with parallel longitudinal axes are moved such that their first ends are easily illuminated and can enter the field of view of the first polarization camera. The first polarization camera can continuously capture first images of the components. The first polarization camera generates a first image as soon as a component enters its field of view.

[0080] Preferably, the system further includes a triggering element adapted to detect the approach of the component and send a signal to the electromagnetic radiation source to activate the electromagnetic radiation source and illuminate the component. If multiple components are considered, the triggering element activates the electromagnetic radiation source each time a new component enters the field of view of the first polarizing camera. The electromagnetic radiation source can be three-dimensional.

[0081] Preferably, the components define a longitudinal axis, and the first polarizing camera has a first field of view, and the method includes: providing a roller; positioning a plurality of components whose longitudinal axes are substantially parallel to each other on the roller; rotating the roller; and generating a first image of a first end of some of the plurality of components that enter the first field of view of the first camera through the rotation of the roller. The movable element can be of any type. The polarizing camera can be placed at several locations within the system to form components for aerosol generation articles.

[0082] Preferably, the method includes discarding the component based on the position of the receptor. If the receptor is not correctly placed within the component, the component containing the incorrectly positioned receptor is preferably discarded. For example, compressed air can be used to push away the unwanted component.

[0083] Preferably, the system includes a moving element adapted to move a plurality of components whose longitudinal axes are arranged parallel to each other.

[0084] Preferably, the system includes a rejection unit adapted to reject components based on the position of the sensor. More preferably, the movable element includes a roller or a conveyor belt.

[0085] Preferably, the first electromagnetic radiation source includes a strobe lamp adapted to illuminate the component at a given frequency. More preferably, the strobe lamp includes an optical device that focuses the electromagnetic radiation onto the component.

[0086] Preferably, the system includes a second electromagnetic radiation source suitable for irradiating the component, the second source being different from the first source. Attached Figure Description

[0087] The invention will now be described in more detail with reference to the accompanying drawings, which are not restrictive, in which:

[0088] - Figure 1 A schematic perspective view of a first embodiment of a system for producing components of aerosol-generating articles;

[0089] - Figure 2 This is a schematic side view of a second embodiment of a system for producing components of aerosol-generating articles;

[0090] - Figure 3 This is a schematic perspective view of a third embodiment of a system for producing components of aerosol-generating articles;

[0091] - Figure 4 This is a schematic perspective view of a fourth embodiment of a system for producing components of aerosol-generating articles;

[0092] - Figure 5 This is a schematic perspective view of a fifth embodiment of a system for producing components of aerosol-generating articles;

[0093] - Figure 6 This is a schematic front view of a component used in aerosol-generating articles:

[0094] - Figure 7 yes Figure 6 A schematic side view of the component;

[0095] - Figure 8 These are images of the components taken with a polarizing camera;

[0096] - Figure 9 It is the method according to the present invention Figure 8 Image refinement;

[0097] - Figure 10 It is the method according to the present invention Figure 9 Image refinement;

[0098] - Figure 11 These are images of the components taken with a polarizing camera;

[0099] - Figure 12 It is the method according to the present invention Figure 11 Image refinement;

[0100] - Figure 13 It is the method according to the present invention Figure 12 Image refinement;

[0101] - Figure 14 It is the method according to the present invention Figure 13 Image refinement;

[0102] - Figure 15 These are photographs of the components taken with a standard camera; and

[0103] - Figure 16 yes Figure 2 A detailed front view of the system; and

[0104] - Figure 17 This is a flowchart of the method of the present invention. Detailed Implementation

[0105] A general system for producing aerosol-generating articles is shown and generally indicated by 20.

[0106] exist Figure 6 and Figure 7 Component 50 is schematically represented. Component 50 is rod-shaped and defines a longitudinal axis 51. Component 50 includes a first end 52 and a second end 53 opposite to each other. The first end 52 is... Figure 6 The previous view is shown in the middle.

[0107] Component 50 includes an aerosol forming matrix 54 depicted by dots in component 50. A receptor 55 is inserted within the aerosol forming matrix 54.

[0108] like Figure 15 As shown in the image of a front view of the first end 52 of the component depicted, in this embodiment, the aerosol forming matrix 54 comprises a gel-filled medium. The medium may be cotton. Figure 15 The image shows medium 56, a portion of gel 57 separated from medium 56, pore 58 (i.e., the volume without any elements), and receptor 55. (Image taken with a standard camera.) Figure 15 As can be seen in the image, receptor 55 is almost invisible and can be confused with other elements such as holes.

[0109] System 20 includes a first polarization camera 4. The first polarization camera 4 defines a first field of view and is adapted to generate a first image containing information about the polarization of electromagnetic radiation detected by the camera. The first polarization camera 4 is positioned such that a first end 52 of a component conveyed by conveyor belt 2 can enter the field of view of the first polarization camera 4. For example, the first polarization camera is positioned in front of the first end 52 of component 50. Furthermore, system 20 includes an electromagnetic radiation source 6 to illuminate the first end 52 of component 50.

[0110] exist Figure 1 The first embodiment of the general system 20, indicated by reference numeral 1, is shown in the figure. The same reference numerals indicate the same elements as those described in the reference system 20.

[0111] Figure 1 System 1 includes a moving element, such as a conveyor belt 2, adapted to transport the components 50. The components 50 are positioned substantially parallel to each other on the conveyor belt 2 along their longitudinal axes 51. System 1 also includes a first polarization camera 4. The first polarization camera 4 defines a first field of view and is adapted to generate a first image containing information about the polarization of electromagnetic radiation detected by the camera.

[0112] The first polarizing camera 4 is positioned such that the first end 52 of the component conveyed by the conveyor belt 2 can enter the field of view of the first polarizing camera 4 during the movement of the conveyor belt 2. In the depicted embodiment, the component 50 is aligned such that the first polarizing camera 4 forms an approximately 0-degree angle of view, i.e., parallel to the surface of the first end 52 of the component 50. System 1 also includes a mirror 5 that splits the optical path of electromagnetic radiation from the component 50 into two components. In this way, the first polarizing camera 4 can be mounted orthogonally to the longitudinal axis 51 of the component 50 (i.e., the central optical axis of the first polarizing camera is perpendicular to the longitudinal axis 51 of the component 50), thereby providing a compact solution. The mirror 5 can be movable so that possible inaccuracies in the relative position of the component 50 can be corrected without moving the first polarizing camera 4. System 1 also includes a first electromagnetic radiation source 6 adapted to illuminate the first end 52 of the component 50. The first source 6 can emit only a specific wavelength. The first source preferably emits white light. As an example of the first source 6, a spotlight LED that flashes bright white light can be used. The first source 6 may consist of two or more spotlights or LED ring lights, preferably positioned to obtain uniform light and a specific illumination angle.

[0113] System 1 includes a control unit 30, which is adapted to control the first polarization camera 4 and refine the first image generated by the first polarization camera 4.

[0114] exist Figure 2 and Figure 16 The figure shows a second embodiment of the general system 20, indicated by reference numeral 40. The same reference numerals are used to indicate and refer to... Figure 1 The components described in System 1 are the same. The difference between System 1 and System 40 lies in the moving components. Instead of a conveyor belt, component 50 is positioned within a roller 8, which rotates in the direction indicated by arrow 9. A first polarizing camera 4 is positioned on one side of the roller 8 such that the first end 52 of component 50 enters the field of view of the first polarizing camera 4 as the roller 8 rotates. The roller 8 may be part of a combiner. Figure 16As shown, preferably, system 40 further includes a mirror 5 for guiding electromagnetic radiation from component 50 to the first polarization camera 4. A first source 6 may also be present in system 40. Figure 2 and Figure 16 (Not shown in the image).

[0115] exist Figure 3 The figure shows a third embodiment of the general system 20, indicated by reference numeral 60. The same reference numerals are used to indicate and refer to... Figure 1 The same elements described in System 1. System 60 includes a first polarizing camera 4 and a second polarizing camera 7, preferably the same as the first polarizing camera 4. The second polarizing camera 7 is adapted to generate a second image including polarization information for each pixel at the first end 52 of component 50. The second polarizing camera 7 defines the field of view. Figure 3 The figure shows the central axis 14 of the field of view of the first polarizing camera 4 and the central axis 17 of the field of view of the second polarizing camera 7. As shown, the first and second polarizing cameras are positioned slightly horizontally offset from each other, that is, their respective central axes of field of view form an angle between them. In this way, the first and second images of the first end 52 of component 50, generated by the first and second polarizing cameras respectively, are taken from different angles. By superimposing the first and second images, a "stereo" composite image including much more three-dimensional features than a single first or second image can be created. In this way, the three-dimensional structure located at the first end 52 of component 50 can be made identifiable.

[0116] The second polarization camera 7 is also controlled by the control unit 30, and the second image can be refined by the control unit 30.

[0117] exist Figure 4 The figure shows a fourth embodiment of the general system 20, indicated by reference numeral 70. The same reference numerals are used to indicate and refer to... Figure 1 The same elements described in System 1. System 70 includes a third polarization camera 11 adapted to generate a third image of the second end 53 of component 50. Thus, as the conveyor belt 2 moves, the first polarization camera 4 generates a first image of the first end 52 of the component, and the third polarization camera 11 generates a third image of the second end 53 of the component. Preferably, the first and third images are captured simultaneously. Therefore, misalignment of the receptors 55 at the first end 52 and the second end 53 can be detected.

[0118] The third polarization camera 11 is also controlled by the control unit 30, and the third image can be refined by the control unit 30.

[0119] exist Figure 5 The fifth embodiment of the general system 20, indicated by reference numeral 80, is shown in the figure. System 80 includes... Figure 4The system 70 contains the same components as the component 50, and additionally includes an additional X-ray imaging unit 12. The X-ray imaging unit 12 is adapted to take non-destructive images of the component 50 along its entire length between a first end 52 and a second end 53. The X-ray imaging unit 12 is adapted to generate X-ray images. The X-ray images can visually display different densities, and thus resolution and detail can be obtained for individual elements within the component 50, such as paper, cotton, gel, pores, tobacco, and receptors.

[0120] The X-ray imaging unit 12 is also controlled by the control unit 30, and the X-ray image can be refined by the control unit 30. The X-ray imaging unit 12 can also be used in systems 1, 40, 60, and 70.

[0121] Systems 1, 40, 60, 70, or 80 operate according to the method of the present invention, which in Figure 17 The image is depicted schematically.

[0122] In step 100, multiple components 50 are placed parallel to each other on a movable element, such as a conveyor belt 2 or a roller 8, with their longitudinal axes 51. As the movable element 2 or 8 moves, in step 101, each first end 52 of component 50 successively enters the field of view of a first polarization camera 4. In the same step 101, a second end 53 of the component may enter the field of view of a third polarization camera 11. In step 102, the first end 52 is illuminated by a first light source 6. The first light source 6 can be turned on by the proximity of the component. In step 103, the first polarization camera 4 generates a first image of the first end 52. In the same step, the third polarization camera 11 generates a third image of the second end 53. The first image 90 is formed by multiple pixels. Each pixel contains polarization information of electromagnetic radiation from the first end of the component. Figure 8 An example of a first image 90 is given below. In this image, each pixel shows a polarization value along a given direction. There are four polarization directions, so each pixel gives a polarization value along one of these four directions. A third image (not shown) with the same characteristics as the first image 90 can be generated for the second end 53. Figure 11 Another example of the first image 90 is given below.

[0123] In step 104, the control unit 30 refines the first image 90 to generate a fine image 91. Figure 9 A fine image is depicted. The fine image 91 for each pixel can show the DOP of the electromagnetic radiation detected by the first polarization camera 4. The same refinement can be applied to the third image. Figure 9 In the refined image 91, it is evident that receptor 55 is more prominent than in the first image 90. The refined image 91 can be further refined in step 105 using standard machine vision algorithms to obtain, for example... Figure 10The further refined image 92 depicted herein. These algorithms may include one or more of the following: blob detection, edge detection, region growing. In step 106, the location of receptor 55 is identified from the further refined image.

[0124] refer to Figures 11 to 14 Another example of a refined first image 900 obtained by the first polarization camera 4 is depicted. Figure 11 The first image is 900, where each pixel displays a polarization value along a given direction. There are four polarization directions, so each pixel gives a polarization value along one of these four directions. Figure 12 The refined image 901 can display the DOP of electromagnetic radiation detected by the first polarization camera 4 for each pixel. Rectangles are used to highlight the position of the receptor 55. Figure 12 Image 901 can be found Figure 13 Further refinement is achieved in image 902 to further enhance the clarity of the receptor. Figure 14 The image shows a segmented view 903 of the first end 52 of the component. A receptor 55 is identified and located in the first end 52.

Claims

1. A method for optical analysis of components of an aerosol-generated article, the method comprising: - A component providing an aerosol-generating article defining a first end and a second end, said component comprising: o Aerosols form a matrix; o-sensor, wherein the sensor forms a matrix thermal contact with the aerosol; - Provide a first polarization camera, the first polarization camera including a sensor for detecting polarization information of electromagnetic radiation; - Irradiate the component with electromagnetic radiation; - Electromagnetic radiation transmitted, reflected, or refracted from the component is detected by the first polarization camera; - A first image of the first end of the component is generated by the first polarization camera, the first image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information about the detected electromagnetic radiation; and - Detect the location of the receptor in the first image.

2. The method according to claim 1, comprising: - Evaluate one of the following from the polarization information in the first image: o-degree of polarization; or o Polarization angle.

3. The method of claim 1 or claim 2, wherein the first polarizing camera defines a first field of view having a first central axis; and the method comprises: - Provide a second polarization camera, the second polarization camera including a sensor for detecting polarization information of electromagnetic radiation, the second polarization camera defining a second field of view having a second central axis, the second central axis forming an angle other than zero with the first central axis; - Electromagnetic radiation transmitted, reflected, or refracted from the component is detected by the second polarization camera; - A second image of the first end of the component is generated by the second polarization camera, the second image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information about the detected electromagnetic radiation; - Combine the polarization information contained in the first image with the polarization information contained in the second image to obtain a single combined image of the first end of the component.

4. The method according to claim 1 or claim 2, comprising: - Provide a third polarization camera, which includes a sensor for detecting polarization information of electromagnetic radiation; - Electromagnetic radiation transmitted, reflected, or refracted from the component is detected by the third polarization camera; - A third image of the second end of the component is generated by the third polarization camera, the third image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information about the detected electromagnetic radiation; - Detect the location of the receptor in the third image.

5. The method according to claim 1 or claim 2, comprising: -The component is irradiated by a first electromagnetic radiation; - The first electromagnetic radiation transmitted, reflected, or refracted from the component is detected by the first polarization camera; - Generate a first image of the first end of the component, the first image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information about the detected first electromagnetic radiation; - Irradiate the component with a second electromagnetic radiation that is different from the first electromagnetic radiation; - The second electromagnetic radiation transmitted, reflected, or refracted from the component is detected by the first polarization camera; - A fourth image of the first end of the component is generated by the first polarization camera, the fourth image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information about the detected second electromagnetic radiation; - Combine the polarization information contained in the first image with the polarization information contained in the fourth image to obtain a single combined image of the first end of the component.

6. The method of claim 1 or claim 2, wherein the component defines a longitudinal axis and the first polarizing camera has a first field of view, the method comprising: - Provides movable transport components; - Position multiple components substantially parallel to each other along their longitudinal axes on the movable conveyor. - Generate a first image of the first end of some of the plurality of components that enter the first field of view of the first polarization camera via the movement of the movable conveyor.

7. The method of claim 1 or claim 2, wherein the component defines a longitudinal axis and the first polarizing camera has a first field of view, the method comprising: - Provides rollers; - Position multiple components on the roller substantially parallel to each other along their longitudinal axes; - Rotate the drum; - Generate a first image of the first end of some of the plurality of components that enter the first field of view of the first polarizing camera through the rotation of the roller.

8. The method according to claim 1 or claim 2, comprising: - Discard the component based on the location of the sensor.

9. A system for producing components of an aerosol-generating article, wherein the components include: –Longitudinal axis; – First end and second end; - Aerosols form a matrix; - A receptor that forms a matrix thermal contact with the aerosol; The system includes: - A first electromagnetic radiation source, the first electromagnetic radiation source being adapted to irradiate the component; - A first polarization camera, the first polarization camera including a sensor for detecting polarization information of electromagnetic radiation, the first polarization camera defining a first field of view, the first polarization camera being arranged such that a first end of the component is in the first field of view, the first polarization camera being adapted to generate a first image of the first end of the component, the first image being formed by a plurality of pixels, each of the plurality of pixels containing polarization information of electromagnetic radiation detected by the first polarization camera; - A control unit adapted to process the first image and detect the position of the receptor in the first image.

10. The system according to claim 9, comprising: - A movable element adapted to move a plurality of components whose longitudinal axes are arranged parallel to each other.

11. The system of claim 9 or claim 10, comprising a rejection unit adapted to reject the component based on the location of the sensor.

12. The system of claim 10, wherein the moving element comprises a roller or a conveyor belt.

13. The system of claim 9 or claim 10, wherein the first electromagnetic radiation source comprises a strobe lamp adapted to irradiate the component at a given frequency.

14. The system of claim 13, wherein the strobe lamp includes an optical device for focusing electromagnetic radiation on the component.

15. The system according to claim 9 or claim 10, comprising a second electromagnetic radiation source adapted to irradiate the component, the second electromagnetic radiation source being different from the first electromagnetic radiation source.

Images