Aerosol generation device with optical detection

Abstract

In a 1st aspect, the invention is an aerosol-generating device comprising receiving means for receiving and heating at least part of an aerosol-generating article for generating aerosol, a first optical marker arranged within the receiving means, and an optical detection means. The optical detection means is arranged for detecting the first optical marker, and for detecting a second optical marker arranged on an aerosol- generating article, when the aerosol-generating article is received by the receiving means.

Description

[0001] AEROSOL GENERATION DEVICE WITH OPTICAL DETECTION

[0002] FIELD OF INVENTION

[0003] The present invention relates to an aerosol generation device, in particular an aerosol generation device comprising a mechanism for detecting pollution of the aerosolgenerating device.

[0004] TECHNICAL BACKGROUND

[0005] Aerosol-generating systems currently on the market employ aerosol-generating articles that are provided with an optical marker. An aerosol-generating device provided with an optical detector can detect the optical marker to authenticate the aerosol-generating articles as safe and compatible for use with the aerosol-generating device or calibrate itself to ensure optimal operating parameters for generating an aerosol from the aerosol-generating article.

[0006] However, after repeated use, residue and dirt left behind by repeated generation of an aerosol in the aerosol-generating device can pollute the aerosol-generating device and the optical detector, rendering the optical detector unable to detect the optical marker on the aerosol-generating article. Consequently, an aerosol-generating article that, under normal conditions would be authenticated, cannot be authenticated anymore, or the aerosol-generating device cannot be calibrated for optimal operating parameters for the aerosol-generating article. Pollution of the aerosol-generating device and the optical detector thus prevents the aerosol-generating device from functioning as intended.

[0007] International patent application WO 2023 / 227655 Al relates to an aerosol-generating device configured to receive a consumable article and comprises an optical element delimiting at least partially a heating cavity, a sensing system comprising an electromagnetic radiation detecting system configured to measure an intensity of an electromagnetic radiation passing through and / or reflected by the optical element.

[0008] Therefore, there is a need for an aerosol-generating device and system that can detect a state of pollution of the aerosol generating device. SUMMARY OF THE INVENTION

[0009] Some, or all the above issues of the prior art are addressed by the invention as defined by the features of the independent claims. Preferred embodiments of the invention are defined by the features of the dependent claims.

[0010] Preferred embodiments are now described, by way of example only, with reference to the accompanying drawings.

[0011] In a 1staspect, the invention is an aerosol-generating device comprising receiving means for receiving and heating at least part of an aerosol-generating article for generating aerosol, a first optical marker arranged within the receiving means, and an optical detection means. The optical detection means is arranged for detecting the first optical marker, and for detecting a second optical marker arranged on an aerosolgenerating article, when the aerosol-generating article is received by the receiving means.

[0012] The 1staspect of the invention is advantageous as it allows a state of pollution of the receiving means for receiving the aerosol-generating article to be diagnosed. When the receiving means becomes polluted with dirt from residue as a result of, for example, repeated generation of an aerosol or a malfunction, the optical detection means arranged within the receiving means can become covered with residue and dirt and therefore be rendered unable to detect the first optical marker arranged within the receiving means, and may also be rendered unable to detect the second optical marker in case an aerosol-generating article is received for consumption by a user. The inability of the detection means to detect the first optical marker can be used to determine that the aerosol-generating device, notably the receiving means for receiving the aerosolgenerating article, is in a state of pollution and requires maintenance and cleaning. Having an optical detection means configured to detect both the first optical marker and the second optical marker allows the determining of a state of pollution and the function of authenticating the aerosol-generating article and / or calibrating the aerosolgenerating device to be performed by the same optical detection means, and thus simplifies the aerosol-generating device. According to a 2ndaspect, in the 1staspect, the aerosol-generating device comprises a control unit configured to determine whether the first optical marker can be detected by the optical detection means, and output a signal when it is determined that the first optical marker cannot be detected.

[0013] While the determining of a state of pollution can generally be made by a remote device, the 2ndaspect is advantageous, as it provides the means for determining a state of pollution with aerosol-generating device. This allows the device to independently determine a state of pollution and alert a user that maintenance and / or cleaning is required.

[0014] According to a 3rdaspect, in the preceding aspect, determining whether first marker can be detected comprises determining whether the first optical marker can be identified.

[0015] The 3rdaspect is advantageous, as it improves the accuracy of determining of a state of pollution. Determining whether the first marker can be detected is a binary decision - either the first marker can be detected, or it cannot be detected. However, a state of pollution in which the optical detection means cannot properly detect the second marker on the aerosol-generating consumable may be present even if the first marker can still be detected. The 3rdaspect of the invention further refines this determination. Determining whether the first marker can be identified requires that characteristics of the first optical marker, such as, for example, the shape, size, pattern, color, or other suitable characteristic of the first optical marker can be detected by the first detection means.

[0016] According to a 4thaspect, in the preceding aspect, determining whether first marker can be identified comprises determining whether the first optical marker can be identified with a confidence level above a predetermined threshold level.

[0017] The 4thaspect is advantageous as it further refines and improves the accuracy for determining whether the first optical marker can be identified to further improve the accuracy of determining a state of pollution. According to a 5thaspect, in any one of the 2ndto 4thaspects, the first optical marker encodes first information, and determining whether first marker can be detected comprises determining whether the first marker can be decoded to obtain the first information.

[0018] The 5thaspect is advantageous as it even further refines and improves the accuracy for determining whether the first marker can be identified to further improve the accuracy of determining a state of pollution.

[0019] According to a 6thaspect, in any one of the preceding aspects, the control unit comprises artificial intelligence for determining whether the first marker can be detected.

[0020] The 6thaspect is advantageous as it even further refines and improves the accuracy for determining whether the first marker can be detected or identified.

[0021] According to a 7thaspect, in any one of the preceding aspects, the first optical marker is arranged on a portion of an inner surface of the receiving means.

[0022] The 7thaspect is advantageous as it further improves the accuracy for determining of a state of pollution, as the inner surface of the receiving means is the part of the receiving means that is typically exposed the most to residue and dirt.

[0023] According to an 8thaspect, in the preceding aspect, the first optical marker is embossed into or overmoulded onto the portion of the inner surface of the receiving means.

[0024] The 8thaspect is advantageous as it provides a simple and durable first optical marker and thus prolongs the lifespan during which a state of pollution can be correctly determined. In contrast to, for example, a first optical marker that is provided via printing or adhesive techniques, an embossed or overmoulded first optical marker can withstand repeated insertion and removal of an aerosol-generating article when the aerosol-generating device is used by a user, as well as repeated maintenance and cleaning procedures.

[0025] According to a 9th aspect, in any one of the 7th to 8th aspects, a first protrusion, for squeezing an aerosol-generating article received by the receiving means, is arranged on a first portion of the inner surface of the receiving means, and the optical marker is arranged on the first protrusion.

[0026] The 9thaspect is advantageous as it provides both a means for securing an aerosolgenerating article received by the receiving means, and a means for improving the accuracy in making the determination whether a state of pollution is present. The protrusions are configured to squeeze an aerosol-generating article when received by the receiving means, and thus restrict freedom of the movement of the aerosolgenerating article and secure the aerosol-generating article to the aerosol-generating device once the aerosol-generating article is received by the receiving means. Additionally, physical contact that is created between the first protrusion and an aerosol-generating article that is inserted into or removed from the receiving means can remove dirt and residue deposited on the first protrusion, and consequently, and can consequently also remove dirt from the first optical marker that is arranged on the first protrusion. This cleaning effect reduces the effects of residue and dirt left behind in the receiving means due to repeated generation of an aerosol and prolongs the timespan during which the first optical marker can be reliably detected.

[0027] According to a 10thaspect, in any one of the 7thto 9thaspects, a second protrusion, for squeezing an aerosol-generating article received by the receiving means, is arranged on a second portion of the inner surface of the receiving means, the optical detection means is arranged adjacent or in contact with the second protrusion. The second protrusion extends further away from the inner surface of the receiving means than the optical detection means, and the first protrusion and the second protrusion are arranged on opposite portions of the inner surface of the receiving means.

[0028] The loth aspect is advantageous as it further secures the aerosol-generating article to the aerosol-generating device. Additionally, by extending further away from the optical detection means, the second protrusion can ensure that an aerosol-generating article squeezed by the second protrusion is distanced from the optical detection means by a predetermined distance to allow the second optical marker arranged on the aerosolgenerating article to be reliably read by the optical detection means. Additionally, arranging the optical detection means adjacent or in contact with the second protrusion, that is arranged on an opposite portion of the inner surface of the receiving means than the first protrusion, on which the first optical marker is provided, further provides an advantageous geometric arrangement of the optical detection means relative to first optical marker so that the first optical marker can be reliably detected.

[0029] According to an 11thaspect, in the preceding aspect, the second protrusion is partially or fully transparent and arranged to cover at least a portion or all of the optical detection means.

[0030] When the second protrusion covers a portion of all of the optical detection means, physical contact that is created between the second protrusion and an aerosol- generating article that is inserted into or removed from the receiving means can remove dirt and residue deposited on the second protrusion that is covering the optical detection means. This cleaning effect reduces the effects of residue and dirt left behind in the receiving means due to repeated generation of an aerosol and prolongs the timespan during which the optical detection means can reliably detect the first optical marker and / or the second optical marker.

[0031] According to a 12thaspect, in any one of the precedent aspects, the first optical marker comprises one or more optical patterns or images.

[0032] The 12thaspect is advantageous as it further improves the accuracy of determining a state of pollution. For example, in case of an optical marker with a single and simple optical feature or characteristic, determination whether that optical feature of characteristic can be detected is prone to errors. In contrast, one or more images or one or more patterns represent more complex optical markers, and detecting an image or a pattern requires the detection of a plurality of optical features, thereby making the process of detecting the one or more images or one or more patterns more robust.

[0033] According to a 13thaspect, in any one of the preceding aspects, the receiving means is a cavity with an opening through which an aerosol-generating article can be inserted and removed from the cavity.

[0034] The 13thaspect is advantageous as it allows an aerosol-generating article to be better secured with the aerosol-generating device.

[0035] According to a 14thaspect, in the preceding aspect, the cavity has an elongated shape with a base located at a distal end of the elongated shape and the opening located at a proximal end of the elongated shape.

[0036] The 14thaspect is advantageous, as it improves the compatibility of the aerosolgenerating device for use with aerosol-generating articles that typically have a shape emulating the shape of a traditional cigarette.

[0037] According to a 15thaspect, in any one of the 13thor 14thaspects, the first optical marker and / or the optical detection means is / are arranged proximate the opening of the cavity.

[0038] The 15thaspect is advantageous, as it allows easy access to the optical detection means and / or the first optical marker in case of maintenance and repair. Additionally, cavities for heating an aerosol-generating articles are typically not heated at portions of the cavity proximate the opening. Arranging the first optical marker and / or the optical detection means therefore also prolongs the lifespan of the first optical marker and / or of the optical detection means.

[0039] According to a 16thaspect, in the 13thor 14thaspect, the aerosol-generating device is provided with a moveable closing mechanism is provided for covering and uncovering the opening, the optical detection means is provided on the inner surface of the base at the distal end, and the first optical marker is arranged on the inner surface of the moveable closing mechanism at the proximal end.

[0040] The 16thaspect is advantageous, as it allows the function of the aerosol-generating article for determining a state of pollution to be suitable for aerosol-generating articles that have an elongated shape and / or that have a second optical marker arranged at an end portion aerosol-generating article that is first inserted into the cavity of the aerosol-generating device when the aerosol-generating article is inserted into the cavity.

[0041] According to a 17thaspect, in of any one of the preceding aspects, the optical detection means comprises a photodetector.

[0042] The 17thaspect is advantageous, as photodetectors can be miniaturized and are simple, cost-efficient, and energy efficient.

[0043] According to an 18thaspect, in the preceding aspect, the photodetector comprises a barcode reader or camera.

[0044] The 18thaspect is advantageous, as barcode readers or cameras are simple and reliable optical detection means.

[0045] According to a 19thaspect, in the preceding aspect, the camera comprises a CCD, CMOS, or IR camera.

[0046] The 19thaspect is advantageous, as CCD, CMOS or IR cameras each have their advantages that make them suitable for different requirements. CCD cameras are simple and capture homogenous images, thus improving the detection of the first optical marker. CMOS cameras are energy efficient and have a high dynamic range, and therefore also improve the detection of the first optical marker. IR cameras allow high contrast images to be captured even in lowlight conditions and are therefore well suited to be arranged within the receiving means at positions with low light. According to a 20thaspect, in any one of the preceding aspects, the optical detection means comprises a photoemitter.

[0047] The 20thaspect is advantageous, as the photoemitter can illuminated the first optical marker to allow the first optical marker to be detected by the optical detection means in case the arrangement of the first optical markers does not allow for sufficient ambient light required for the optical marker to be optically detected.

[0048] A 21staspect of the invention is a system comprising an aerosol-generating device according to any one of the preceding aspects, and an aerosol-generating article provided with a second optical marker, wherein the optical detection means of the aerosol-generating device is configured to detect the second optical marker when the aerosol-generating article is received by the aerosol-generating device.

[0049] The advantages of the 21staspect correspond to the advantages of the 1staspect.

[0050] According to a 22ndaspect, in the preceding aspect, the aerosol-generating device is an aerosol-generating according to claim 15, and the second optical marker is provided on a portion of the aerosol-generating article that is arranged close to the opening of the aerosol-generating device when the aerosol-generating article is received by the aerosol-generating device.

[0051] The advantages of the 22ndaspect correspond to the advantages of the 15thaspect.

[0052] According to 23rdaspect, in the 21staspect, the aerosol-generating device is an aerosolgenerating device according to the 16thaspect, and the second optical marker is provided on an end portion of the aerosol-generating article that faces the inner surface of the base at the distal end of the aerosol-generating device when the aerosolgenerating article is received by the aerosol-generating device.

[0053] The advantages of the 23rdaspect correspond to the advantages of the 16thaspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figs. 1A and 1B respectively show schematic illustrations of an aerosol-generating device and an aerosol-generating system, according to embodiments of the invention.

[0055] Figs. 2A and 2B respectively show schematic illustrations of an aerosol-generating device and an aerosol-generating system, according to embodiments of the invention.

[0056] Figs. 3A and 3B respectively show schematic illustrations of an aerosol-generating device and an aerosol-generating system, according to embodiments of the invention.

[0057] Figs. 4A and 4B respectively show schematic illustrations of an aerosol-generating device and an aerosol-generating system, according to embodiments of the invention.

[0058] Figs. 5A and 5B respectively show schematic illustrations of an aerosol-generating device and an aerosol-generating system, according to embodiments of the invention.

[0059] Figs. 6A, 6B, and 6C respectively show schematic illustrations of optical markers according to embodiments of the invention.

[0060] DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0061] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "above", "inner side", "under", “below”, "horizontal", "coaxial", "central", "end" "part", "length", "outer end" etc., which indicate the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings. The terms such as "upper", "above", "below", "under" and the like used in the present invention to indicate a relative position in space are used for the purpose of facilitating explanation to describe a unit or feature shown in the drawings relative to the relationship of another unit or feature. The term of the relative position in space may be intended to include different orientations of the device in use or operation other than those shown in the figures. For example, if the device in the figure is turned over, the unit described as being "below" or "under" other units or features will be "above" the other units or features. Therefore, the exemplary term "below" can encompass both the above and below orientations. The device can be oriented in other ways (rotated by 90 degrees or other orientations), and the space- related descriptors used herein are explained accordingly. More specifically, the word “above” means that one unit, layer or element is arranged or configured relatively in an exterior direction of the device towards the (an)other unit(s), layer(s) or element(s); the IO word “below” means that one unit, layer or element is arranged or configured relatively in an interior direction of the device towards the other units, layers or elements.

[0062] Aerosol-generating devices 100 according to the invention are preferably portable devices. For this purpose, they are of limited size. According to preferred embodiments of the invention, portable aerosol-generating devices 100 are hand-held devices that fit into a hand of a user and that can be operated by hand.

[0063] The aerosol-generating device 100 is configured to be used in conjunction with an aerosol-generating article 200 that comprises an aerosol-generating substrate 210. The aerosol-generating article 200 can be received by or otherwise connected or attached to the aerosol-generating device 100 such that the aerosol-generating substrate 210 comprised by the aerosol-generating article 200 can be heated by the aerosolgenerating device too for generating an aerosol for consumption by a user of the aerosol-generating device too.

[0064] Figs. 1A and 1B illustrates an electronic configuration of an aerosol-generating device too according to embodiments of the invention. The aerosol-generating device too comprises an outer housing or casing within which components of the aerosolgenerating device are arranged. The aerosol-generating device too further comprises receiving means for receiving an aerosol-generating article 200 that comprises an aerosol-generating substrate 210. An aerosol-generating unit 130 is configured to heat the aerosol-generating substrate 210, comprised by the aerosol-generating article 200 received by the receiving means, to generate an aerosol for consumption by a user. As a preferably portable and handheld device, the aerosol-generating device too further comprises a power source 150, such as, for example, a rechargeable and / or replaceable battery. The power source is configured to provide power to electronic components of the aerosol-generating device too. In preferred embodiments, a control unit 140 is provided with the aerosol-generating device too, wherein the control unit 140 is configured for controlling various functions for the functioning of the aerosolgenerating device too. In preferred embodiments, the control unit 140 is configured to control operation of the aerosol-generating unit 130 for heating the aerosol-generating substrate 210 to generate an aerosol.

[0065] The aerosol generation device too may have a generally longitudinal shape in the longitudinal direction L, and a substantially circular or elongated cross-section in the transverse direction T. However, other shapes of the aerosol-generating device too and with different cross-sections are possible. The longitudinal direction L is parallel to the inhalation direction, i.e., the direction in which the aerosol-generating device too is inserted or brought to a user’s mouth for inhaling a generated aerosol, and the transverse direction T is perpendicular to the inhalation direction.

[0066] In an embodiment, the aerosol-generating substrate 210 is a solid substrate such as, for example, a tobacco substrate. A tobacco substrate comprises tobacco which may be in the form of ground or milled tobacco leaves. Additionally, the tobacco substrate may comprise gellan gum, and additionally, or alternatively a CMC binder. Both gellan gum and CMC binder can act binders, thickeners, and / or stabilizers.

[0067] The aerosol-generating article 200 comprising solid aerosol-generating substrates can be provided in different shapes and sizes. As shown in Fig. 1B, the aerosol-generating article 200 can comprise an aerosol-generating substrate 210 that is a tobacco substrate that may also have a shape that is elongated in the longitudinal direction L with a circular or elliptical base shape in the transverse direction T, the shape of the aerosolgenerating substrate 210 emulating the shape of a traditional cigarette. Alternatively, the solid aerosol-generating article 200 may be disk-shaped, or, alternatively, half- spherical, spherical, or ellipsoidal.

[0068] In preferred embodiments, the aerosol-generating article 200 comprises a wrapper that is wrapped around an aerosol-generating substrate 210 such as, for example, a tobacco material. The wrapper may be a sheet material that may be made from a fiber material such as, for example, paper, flax, or linen.

[0069] A second optical marker 220 can be provided to be visible on the outside of the aerosolgenerating article 200, wherein the second optical marker 220 can be detected by an optical detection means 120 of the aerosol-generating device 100 when the aerosolgenerating article 200 is received by a receiving means of the aerosol-generating device 100. The detection of the second optical marker 220 by the optical detection means 120 can be utilized to authenticate the aerosol-generating article 200 as suitable for use with the aerosol-generating device 100. Additionally, or alternatively, detection of the second optical marker 220 by the optical detection means 120 can be utilized to calibrate operational parameters such heating duration or heating temperature for the aerosol-generating article 200.

[0070] The receiving means for receiving the aerosol-generating article may preferably be cavity 105 into which the aerosol-generating article 200 can be partially or fully inserted. The size and shape of the cavity 105 can be adapted depending on the size and shape of the aerosol-generating article 200. For example, in case the solid aerosolgenerating substrate 210 is of the shape emulating a traditional cigarette, the cavity 105 is preferably of an elongated, preferably tubular shape, wherein an opening, through which the aerosol-generating article 200 can be partially or fully inserted or removed, is arranged at a proximal end of the elongated shape.

[0071] A closing mechanism 101 such as a shutter or similar structural element can be provided to close off the opening of the cavity 105 towards an outside of the aerosolgenerating device 100. This prevents ingress of unwanted particles or substances and prolongs the lifespan of the aerosol-generating device 100 and intervals, after which cleaning, repair, or maintenance of the aerosol-generating device too must be performed. The shutter 101 may be detachable from the aerosol-generating device too and may be attachable to the aerosol-generating device too via snap fit or other suitable connections. The shutter 101 maybe moveably connected to the aerosolgenerating device too. For example, the shutter 101 may be slidable or rotatable to expose or close off the opening of the cavity 105.

[0072] The aerosol-generating unit 130 is configured to heat the aerosol-generating article 200 received by receiving means. The aerosol-generating unit 130 can be configured to heat the aerosol-generating article 200 via convection heating or conduction heating. The aerosol-generating unit 130 may comprise an active heater component such as a resistive heater and / or an inductive heater. The aerosol-generating unit 130 is preferably arranged proximate or in contact with an enclosing structure or wall that forms the cavity 105 within which the aerosol-generating article 200 can be partially or fully inserted. The aerosol-generating unit 130 is preferably configured to not heat portions of a cavity 105 that are proximate the opening through which the aerosolgenerating article 200 can be inserted to prevent accidentally injuring a user of the aerosol-generating device too trying the insert or remove the aerosol-generating article 200 from the cavity 105. In case of an elongated cavity 105 with an upper opening at a proximal end of the aerosol-generating device too, the aerosol-generating article 200 is therefore preferably configured to heat a lower portion of the cavity 105 arranged closer to a distal end of the aerosol-generating device too, but not a portion of the cavity 105 that is neighboring the opening at the proximal end of the aerosol-generating device too. In an embodiment, the heater element can be a film heater or heating wire wrapped around or otherwise arranged at the cavity 105.

[0073] As shown in Figs. 2A and 2B, the aerosol-generating device too according to the invention comprises a first optical marker 110 that is arranged within the receiving means of the aerosol-generating device too. To improve the visibility of the first optical marker 110 for detection, the first optical marker 110 is preferably arranged on an inner surface of the receiving means, such as, for example, the cavity 105, as described above in the context of Figs. 1A and 1B. In a simple configuration, the optical detection means 120 is attached to the inner surface of the cavity 105.

[0074] The first optical marker 110 maybe arranged proximate, preferably neighboring the opening of the cavity 105 at the proximal end of the aerosol-generating device 100. In this case, the optical detection means 120 may also be arranged proximate or preferably neighboring the opening of the cavity 105 to facilitate detection of the first optical marker 110 by the optical detection means 120. Additionally, a heating means for heating an aerosol-generating article 200 received by the cavity 105 is preferably configured to not heat a portion or portions of the cavity proximate or preferably neighboring the upper opening of the cavity where the first optical marker 110 and the optical detection means 120 are respectively arranged.

[0075] To facilitate detection of the first optical marker 110, the optical detection means 120 is preferably arranged on a portion of the inner surface that is opposite to and faces a portion of the inner surface on which the first optical marker 110 is provided such that the first optical marker 110 is in the field of view of the optical detection means 120 (illustrated by dashed lines in Fig. 2A). The optical detection means 120 and the first optical marker 110 are preferably arranged on a same plane that is transverse to the longitudinal direction L that is the top-down direction in Fig. 2A. In case of a cavity 105 with a tubular shape and a circular base shape, the first optical marker 110 and the optical detection means 120 may be arranged to be diametrically opposed relative to the central axis of the tubular cavity 105.

[0076] When the cavity 105 is not in a state of pollution, the optical detection means 120 is not sufficiently polluted, and the first optical marker 110 can be detected by the optical detection means 120. In such a case, when an aerosol-generating article 200 is inserted into the cavity 105 for use with the aerosol-generating device too, as illustrated in Fig. 2B, the second optical marker 220 detectable on the outside of the aerosol-generating article 200 is positioned to be in the field of view of the optical detection means 120. The second optical marker 220 can be detected by the optical detection means 120, and the aerosol-generating device too can perform authentication or calibration procedures based on the detection of the second optical marker 220. For example, for an aerosolgenerating article 200 with a stick shape emulating a traditional cigarette, the second optical marker 220 is preferably provided on the peripheral lateral surface to allow detection of the second optical marker 220 by the optical detection means 120 when the aerosol-generating article 200 is received by the aerosol-generating device too. However, if the cavity 105 is in a state of pollution, the optical detection means 120 is sufficiently polluted, and the optical detection means 120 is unable to detect the first optical marker 110. In such a case, when an aerosol-generating article 200 is inserted into the cavity 105 for use with the aerosol-generating device 100, the second optical marker 220 arranged on the outside of the aerosol-generating article 200 and positioned to be in the field of view of the optical detection means 120 cannot be detected by the optical detection means 120. Consequently, the aerosol-generating device 100 cannot perform authentication or calibration procedures, and the user is prevented from using the aerosol-generating article 200. To prevent such a situation in which the user is prevented from using the aerosol-generating article 200, the aerosolgenerating device too is configured to determine that the cavity 105 is in a state of pollution and notify a user that the aerosol-generating device requires cleaning and / or maintenance.

[0077] As shown in Figs. 3A and 3B, for embodiments described above in the context of Figs. 1A to 2B, the optical detection means 120 is preferably recessed into the inner surface of the cavity 105. For this purpose, a grove or cut-out at the inner surface of the cavity 105 maybe provided for accommodating the optical detection means 120. This helps to prevent the optical detection means 120 from being accidentally damaged when, for example, an aerosol-generating article 200 is being inserted into or removed from the cavity 105, or cleaning is performed. Additionally, by being recessed into the inner surface of the cavity 105, contact between the optical detection means 120 and dirty and residue is decreased, which decreases the rate at which the optical detection means 120 can become polluted.

[0078] The optical detection means 120 is recessed at a position on the inner surface of the cavity 105 such that a second optical marker 220 detectable on the outside of the aerosol-generating article 200 is in the field of view of and can be detected by the optical detection means 120.

[0079] As shown in Figs. 4A and 4B, for embodiments described above in the context of Figs. 1A to 3B, a first protrusion 161 may be provided on the inner surface of the cavity 105. A second protrusion 162 may also be provided on the inner surface of the cavity 105. The first protrusion 161 and the second protrusion 162 may be provided proximate or preferably neighboring the upper opening of the cavity 105. The first protrusion 161 and the second protrusion 162 are configured to extend away from the inner surface of the cavity 105 to an extent that is sufficient for squeezing / pinching an aerosol-generating article 200 that is received by the cavity 105. The pinching / squeezing prevents movement of the aerosol-generating article 200 in transverse directions T when received by the cavity 105. Additionally, the physical contact between the first protrusion 161 and optionally the second protrusion 162 inhibits movement of the aerosol-generating article 200 in the longitudinal direction to prevent the aerosolgenerating article 200 from being unintentionally removed from the cavity 105.

[0080] The first protrusion 161 and the second protrusion 162 preferably have a half-spherical shape, a dome shape, or any suitable shape with a convexly curved outer surface for squeezing of the aerosol-generating article 200. These shapes are preferable as they lack sharp edges or corners that can damage the aerosol-generating article 200 when inserted into or removed from the cavity 105.

[0081] The first optical marker 110 may be arranged on the outer surface of the first protrusion

[0082] 161.

[0083] The optical detection means 120 may be arranged adjacent to the second protrusion. Preferably, the optical detection means 120 is arranged lower than the second protrusion, i.e., further away from the opening of the cavity 105. In such an arrangement, the second protrusion 162 preferably extends further away from the inner surface of the cavity 105 than the optical detection means 120. For this, the optical detection means 120 can be partially or fully recessed into the inner surface of the cavity 105.

[0084] The optical detection means 120 may be provided directly in contact with the second protrusion 162. For example, to protect the optical detection means 120 from being damaged, the optical detection means 120 may also be recessed into the second protrusion 162, wherein a cut-out or groove may be provided in the second protrusion

[0085] 162. In this arrangement, the second protrusion 162 preferably extends further away from the inner surface of the cavity 105 than the optical detection means 120.

[0086] Alternatively, the optical detection means 120 may be partially or fully covered by the second protrusion 162, wherein at least part of the second protrusion 162 is configured to be partially or fully transparent for wavelengths of light that the optical detection means 120 is capable of detecting. Such a configuration provides the advantage that not only is the optical detection means 120 protected by the second protrusion 162, but that additionally, due to the second protrusion 162 being in physical contact when the aerosol-generating article 200, inserting the aerosol-generating article 200 into or removing the aerosol-generating article 200 from the cavity 105 causes friction between the aerosol-generating article 200 and the second protrusion 162 that can cause residue or dirt on the second protrusion 162 to be cleaned from the second protrusion 162.

[0087] For embodiments described within the context of Figs. 2A to 4B, the positioning of the first optical marker 110 and optical detection means 120 can be varied. For example, the first optical marker 110 and the optical detection means 120 may be arranged at different heights, i.e., at different positions in the longitudinal direction L on the inner surface of the cavity. Additionally, or alternatively, in case of a tubular or cone-shaped cavity 105, although it is preferable that the first optical marker 110 and the optical detection means 120 are arranged diametrically opposed to each other relative to the center axis of the cavity 105, the first optical marker 110 and the optical detection means 120 may be arranged at any suitable angular distance from each other as long as the first optical marker 110 is in the field of view of and can be detected by the optical detection means 120.

[0088] As shown in Figs. 5A and 5B, in contrast to embodiments described in the context of Figs. 2A to 4B, in which the first optical marker 110 and the second optical marker 220 are detectable by the optical detection means 120 from transverse directions T, the aerosol-generating device too may be provided with a first optical marker 110 and be configured for use with an aerosol-generating article 200 with a second optical marker 220, wherein the first optical marker 110 and the second optical marker 220 are detectable from a substantially longitudinal direction L. The optical detection means 120 is arranged on a portion of the inner surface of the cavity 105 that is at the distal end of the aerosol-generating device opposite the opening of cavity 105 at the proximal end of the aerosol-generating device too. As previously described for embodiments described in the context of Figs. 2A to 4B, the optical detection means 120 may be recessed into the inner surface. Additionally, or alternatively, the optical detection means 120 may covered by a partially or fully transparent covering.

[0089] The aerosol-generating device too is provided with a movable closing mechanism 101 such as shutter, plug, or similar element. The shutter maybe removably attached to the aerosol-generating device too. For example, the shutter maybe attached to the aerosolgenerating device too via mechanical means such as a snap-fit, screw, hook or other suitable mechanical connection. The shutter may be attached to the aerosol-generating device too via magnetic elements provided with the aerosol-generating device too. Additionally, or alternatively, the shutter may be moveably attached to the aerosolgenerating device too. For example, the shutter maybe slidable or rotatable relative to the opening to close off or expose the opening of the cavity 105. When the shutter is in a closed position, an inner surface of the shutter forms part of the inner surface of the cavity 105 is arranged at a proximal end of the cavity 105 opposite the far end of the cavity where the optical detection means 120 is arranged. The first optical marker 110 is provided on the surface of the shutter. With such a configuration, when the shutter is closed, and without an aerosol-generating article 200 being received in the cavity 105, the first optical marker 110 can be detected by the optical detection means 120 if the aerosol-generating device 100 is not in a state of pollution.

[0090] As shown in Fig. 5B, such a configuration of the first optical marker 110 and the optical detection means 120 allows the aerosol-generating device 100 to function with an aerosol-generating article 200 that is provided with a second optical marker 220 that is arranged on an outer surface of an end portion of the aerosol-generating article 200. For example, in case of an aerosol-generating article 200 with an elongated shape that can preferably emulate the shape of a traditional cigarette, the second optical marker 220 can be provided on the outer surface of the end portion of the aerosol-generating article 200 that is first inserted into the cavity 105 when the aerosol-generating article 200 is inserted into the cavity 105 for consumption by a user.

[0091] When the aerosol-generating article 200 is inserted into the cavity 105 and the aerosolgenerating device too is not in a state of pollution, the second optical marker 220 arranged on the outer surface of the end portion of the aerosol-generating article 200 can be detected by the optical detection means 120 for authentication or calibration procedures.

[0092] While the first optical marker 110 and the optical detection means are illustrated in Figs. 5A and 5B to be on the central longitudinal axis, they can be arranged off axis as long as the first optical marker 110 is in the field of view of and can be detected by the optical detection means 120 when the closing mechanism 101 is closed to close off the opening of the cavity 105.

[0093] The first optical marker 110 can be used to convey various types of information with varying complexity and information density. As shown in Figs. 6A and 6B, the first optical marker 110 can comprise or substantially consist of a pattern. The pattern can be a random pattern or a repeating pattern that can further comprise repeating subpatterns. The pattern can comprise stripes, dots, and other regular shapes.

[0094] As shown in Fig. 6C, the first optical marker 110 can additionally comprise, or alternatively substantially consist of one or more symbols and / or images. In case of a plurality of symbols and / or images, the plurality of symbols may comprise one or more different symbols and / or images. The symbols and / or images may also be repeated to form a pattern.

[0095] The first optical marker no can be used to encode information. When the first optical marker no is detected by the optical detection means 120, the information encoded in the first optical marker 110 can be extracted and processed. For this purpose, the first optical marker 110 can be redundant pattern that can encode information redundantly. The information encoded by the first optical marker 110 can be used by the aerosolgenerating device 100 to determine a state of pollution of the aerosol-generating device 100.

[0096] In its simplest form, determining a state of pollution can be a simple binary decision. When the optical marker 110 is visible to and can thus be detected by the optical detection means 120, the aerosol-generating device too can determine that the aerosolgenerating device too is not in a state of pollution. If the first optical marker 110 is not visible to and thus cannot be detected by the optical detection means in a case where the first optical marker 110 and / or the optical detection means 120 are covered with residue and dirt, the aerosol-generating device too can determine that the aerosolgenerating device too is in a state of pollution. Using the pattern of Fig. 6A merely as an example, the aerosol-generating device too can determine that the pattern of the first optical marker 110 is visible to and can be detected by the optical detection means 120 if at least a portion of the pattern is visible to the optical detection means 120. Alternatively, the aerosol-generating device too can determine that the pattern of the first optical marker 110 is visible to and can be detected by the optical detection means 120 if the entire pattern is visible to the optical detection means 120.

[0097] For further refinement of the process of determining a state of pollution, in preferred embodiment, the first optical marker 110 can be used to convey or encode more complex information. Based on a determination of whether the optical detection means 120 is able to not only detect, but also identify the first optical marker 110, the aerosolgenerating device too can process this determination to subsequently determine whether the aerosol-generating device too is in a state of pollution. In embodiments, determining whether the first optical marker 110 can be identified comprises determining, by the aerosol-generating device too, whether the information conveyed or encoded in the first optical marker 110 can be obtained or extracted. For example, the aerosol-generating device too not only determine whether the first optical marker 110 is visible to the optical detection means 120, but also determines whether or not the first optical marker no is sufficiently visible to the optical detection means 120 such that information conveyed or encoded in the first optical marker no detected by the optical detection means 120 can be obtained or extracted. Using the pattern of Fig. 6A as an example, the aerosol-generating device 100 determines that the pattern of the first optical marker 110 can be identified not only if at least a portion of the pattern is visible to the optical detection means 120, but if a sufficiently large portion of the pattern is sufficiently visible that allows information conveyed or encoded in the pattern to be obtained or extracted. If the information cannot be obtained or extracted, the aerosol-generating device too determines a state of pollution. For further refinement, in preferred embodiments, the aerosol-generating device too determines a state of pollution if the information cannot be obtained or extracted from the first optical marker 110 with a sufficient confidence level.

[0098] Preferably, a control unit 140 as described above for embodiments in the context of Figs. 1A to 5B is provided with the aerosol-generating device too. The control unit 140 is configured to control and process information received from the optical detection means 120. The optical detection means 120 is configured to capture one or more images or videos of the first optical marker 110 when an aerosol-generating article 200 is not received by the aerosol-generating device too. The captured one or more images or videos are processed by the control unit 140 to determine whether the first optical marker 110 can be detected or identified. The control unit 140 can be configured with artificial intelligence or machine learning for processing the one or more images or videos captured by the optical detection means 120.

[0099] When the aerosol-generating article 200 is received by the aerosol-generating device too, as previously described for embodiments in the context of Figs. 1A to 5B, the optical detection means 120 is configured to capture one or more images or videos of the second optical marker 220 provided with the aerosol-generating article 200. The captured one or more images or videos are processed by the control unit 140 in the same manner as described for the first optical marker 110. Notably, the second optical marker 220 can be used to convey or encode information that can be obtained or extracted by the aerosol-generating device too. The conveyed or encoded information can be used by the aerosol-generating device too to authenticate the aerosol-generating article 200 as authentic and suitable for use with the aerosol-generating device too. Additionally, or alternatively, the conveyed or encoded information can be used for calibrating the aerosol-generating device too for use with the aerosol-generating article 200. Parameters of the aerosol-generating device too that can be calibrated comprise a heating temperature and heating duration. The first optical marker no can generally be provided by any suitable means. For example, the first optical marker no can be a printed first optical marker no that is arranged within the receiving means. The printed first optical marker no can be a printed sheet that is attached within the receiving means using, for example, known adhesive techniques. Alternatively, the printed first optical marker no can be directly printed onto an inner surface of the receiving means. For example, the patterns, symbols, and images described above in the context of Figs. 6A to 6C can be printed.

[0100] The first optical marker no can also be a three-dimensional structure. In a preferred embodiment, the first optical marker no may be embossed into a portion of the inner surface of the cavity 105. This is preferred when the inner surface of the cavity 105 is made from a ductile material that may comprise or substantially consist of a metallic material. In another preferred embodiment, the first optical marker 110 is overmolded onto a portion of the inner surface of the cavity 105. For example, the patterns, symbols, and images described above in the context of Figs. 6Ato 6C can be provided as a combination of indentations and protrusions.

[0101] The first optical marker 110 can visible under ambient light conditions to the naked eye. Alternatively, the first optical marker 110 can be invisible under ambient lighting conditions to the naked eye. Additionally, the first optical marker 110 can be configured to be visible at light wavelengths outside the visible spectrum. For example, the first optical marker 110 can be printed with UV ink or IR ink.

[0102] The optical detection means 120 comprises a photodetector that can be configured based on the first optical marker 110. In cases where the first optical marker 110 can be detected using light in the visible spectrum, the optical detection means 120 may comprise a camera or barcode scanner. The camera can be a CCD or CMOS camera. The optical detection means 120 maybe provided with a photoemitter to illuminate the first optical marker 110 to allow the first optical marker 110 to be detected by the optical detection means 120 in case there is not sufficient light. In cases where the first optical marker 110 can be detected using light outside of the visible spectrum, the optical detection means 120 comprises a photodetector sensitive to light at respective wavelengths outside of the visible spectrum which can be used to detect the first optical marker 110. For example, if the first optical marker 110 is printed with UV or IR ink, the optical detection means 120 comprises a UV or IR camera. The second optical marker 220 provided with the aerosol-generating article 200 is preferably configured in the same manner as the first optical marker 110 and thus to be detectable by the optical detection means 120 that is configured to detect the first optical marker 110. LIST OF REFECENCE SIGNS USED too aerosol-generating device

[0103] 101 closing mechanism

[0104] 105 cavity 110 first optical marker

[0105] 120 optical detection means

[0106] 130 aerosol-generating unit

[0107] 140 control unit

[0108] 150 power source 161 first protrusion

[0109] 162 second protrusion

[0110] 200 aerosol-generating article

[0111] 210 aerosol-generating substrate

[0112] 220 second optical marker

Claims

Claims1. An aerosol-generating device comprising: receiving means for receiving and heating at least part of an aerosol-generating article for generating aerosol; a first optical marker arranged within the receiving means; and an optical detection means arranged for detecting the first optical marker, and detecting a second optical marker arranged on an aerosol-generating article, when the aerosol-generating article is received by the receiving means.

2. The aerosol-generating device according to the preceding claim, further comprising a control unit configured to determine whether the first optical marker can be detected by the optical detection means, and output a signal when it is determined that the first optical marker cannot be detected.

3. The aerosol-generating device according to the preceding claim, wherein determining whether first marker can be detected comprises determining whether the first optical marker can be identified.

4. The aerosol-generating device according to any one of the preceding claims, wherein the first optical marker is arranged on a portion of an inner surface of the receiving means.

5. The aerosol-generating device according to the preceding claim, wherein the first optical marker is embossed into or overmoulded onto the portion of the inner surface of the receiving means.

6. The aerosol-generating device according to any one of claims 4 to 5, wherein a first protrusion, for squeezing an aerosol-generating article received by the receiving means, is arranged on a first portion of the inner surface of the receiving means, andwherein the optical marker is arranged on the first protrusion.

7. The aerosol-generating device according to claim 6, wherein a second protrusion, for squeezing an aerosol-generating article received in then receiving means, is arranged on a second portion of the inner surface of the receiving means, wherein the optical detection means is arranged adjacent or in contact with the second protrusion, wherein the second protrusion extends further away from the inner surface of the receiving means than the optical detection means, and wherein the first protrusion and the second protrusion are arranged on opposite portions of the inner surface of the receiving means.

8. The aerosol-generating device according to the preceding claim, wherein the second protrusion is partially or fully transparent and arranged to cover at least a portion or all of the optical detection means.

9. The aerosol-generating device according to any one of the preceding claims, wherein the first optical marker comprises one or more optical patterns or images.

10. The aerosol-generating means according to any one of the preceding claims, wherein the receiving means is a cavity with an opening through which an aerosolgenerating article can be inserted and removed from the cavity. n. The aerosol-generating device according to the preceding claim, wherein the cavity has an elongated shape with a base located at a proximal end of the elongated shape and the opening located at a distal end of the elongated shape.

12. The aerosol-generating device according to any one of claims 10 or 11, wherein the first optical marker and / or the optical detection means is / are arranged proximate the opening of the cavity.

13. The aerosol-generating device according any one of claims 10 or 11, wherein a moveable closuring mechanism is provided for covering and uncovering the opening,the optical detection means is provided on the inner surface of the base at the proximal end, and the first optical marker is arranged on the inner surface of the moveable closure at the distal end.

14. The aerosol-generating device according to any one of the preceding claims, wherein the optical detection means comprises a photodetector.

15. A system comprising: an aerosol-generating device according to any one of the preceding claims; and an aerosol-generating article provided with a second optical marker; wherein the optical detection means of the aerosol-generating device is configured to detect the second optical marker when the aerosol-generating article is received by the aerosol-generating device.

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