Ultraviolet cleaning system and method of use

Abstract

To provide a cleaning system that includes an ultraviolet (UV) light source configured to emit ultraviolet in a predetermined wavelength range and a target having a predetermined transparency to the predetermined wavelength range.SOLUTION: The cleaning system further includes a contact element (610) removably coupled to the target (604). The ultraviolet light source (602) cleans the target, where the target is configured to cause motion of the contact element in response to force being applied to the target. The cleaning system can further include one or more reflectors (608) or absorbers (606) coupled to the target or ultraviolet light source, or positioned relative to the target or ultraviolet light source, in order to control the emission of ultraviolet.SELECTED DRAWING: Figure 6A

Description

[Technical Field]

[0001] The present disclosure relates to ultraviolet cleaning systems and methods of use. [Background technology]

[0002] In places like stores, airplanes, and other transportation vehicles, many users may touch equipment and fixtures. Cleaning such equipment is difficult for users, increasing the likelihood of contamination with dirt, bacteria, viruses, and other undesirable elements. These undesirable elements can be transmitted between users who touch the equipment or between people they come into contact with. Current solutions include replacing high-touch elements entirely or coating such high-touch elements with antimicrobial agents. These methods are time-consuming and not easily retrofittable. Therefore, there remains a need for systems and methods for cleaning equipment used by many people. Summary of the Invention

[0003] The present disclosure provides a cleaning system, which in one aspect includes a target having at least 30% transparency to ultraviolet radiation in a wavelength range from about 222 nanometers (nm) to about 300 nm, and a contact element removably coupled to the target and configured to perform an action in response to application of a force to the target.

[0004] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system comprises a target having at least about 30% transmissivity to ultraviolet light.

[0005] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system includes a target having a transmittance of about 50% to about 75% to said ultraviolet light.

[0006] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system includes a target formed of a transparent material having an ultraviolet transmittance of from about 95% to about 99.15%.

[0007] In one aspect, in combination with any of the above or below example cleaning systems, said cleaning system includes a target formed from a transparent material of borosilicate glass.

[0008] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system includes a target having a thickness of from about 0.2 millimeters (mm) to about 20 centimeters (cm).

[0009] In one aspect, in combination with any cleaning system example above or below, said cleaning system includes a target directly coupled to said contact element by adhesive, mechanical coupling, magnetic coupling, press-fit coupling, or combinations thereof.

[0010] In one aspect, in combination with any of the cleaning system examples above or below, said cleaning system includes a target indirectly coupled to said contact element via a fixture.

[0011] In one aspect, in combination with any cleaning system example above or below, the cleaning system further includes a component in direct contact with and removably coupled to each of the contact element and the target.

[0012] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system further comprises an ultraviolet (UV) light source configured to emit ultraviolet light in the wavelength range of about 222 nm to about 254 nm.

[0013] In one embodiment, in combination with any cleaning system example above or below, the cleaning system further comprises a first reflector configured to reflect the ultraviolet light onto at least one surface of the target.

[0014] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system includes a first reflector formed from a fluoropolymer.

[0015] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system includes a first reflector formed of a material including a plurality of pores, each pore having a maximum diameter less than 222 nm.

[0016] In one aspect, in combination with any cleaning system example above or below, the cleaning system includes a target having at least one target absorber configured to absorb ultraviolet light after the ultraviolet light passes through at least one surface of the target.

[0017] In one aspect, in combination with any cleaning system example above or below, the cleaning system includes a target having a second reflector configured to reflect the ultraviolet light received from the ultraviolet light source in at least one direction through the target and direct the ultraviolet light toward at least one other surface of the target.

[0018] The present disclosure provides a cleaning system, which in one aspect includes an ultraviolet (UV) light source configured to emit ultraviolet light in a wavelength range of about 222 nm to about 300 nm, a target having at least 30% transparency to ultraviolet light in the wavelength range of about 222 nanometers (nm) to about 300 nm, and a contact element removably coupled to the target and configured to perform an operation in response to application of a force to the target.

[0019] In one embodiment, in combination with any of the above or below example cleaning systems, said cleaning system includes a target formed of a transparent material having a transmittance of from about 95% to about 99.15%.

[0020] In one aspect, in combination with any of the above or below example cleaning systems, said cleaning system includes a target formed from a transparent material of borosilicate glass.

[0021] In one aspect, in combination with any of the cleaning system examples above or below, the cleaning system further includes a non-transitory medium executable by a processor and configured to store a plurality of logics including at least one cleaning program.

[0022] In one aspect, in combination with any of the cleaning system examples above or below, the cleaning system further includes a sensor configured to detect a triggering event, and the at least one cleaning program is configured to emit the ultraviolet light in response to the sensor detecting the triggering event.

[0023] In one aspect, in combination with any of the above or below example cleaning systems, said cleaning system further includes said sensor being associated with said target.

[0024] In one aspect, in combination with any of the above or below example cleaning systems, said cleaning system includes said sensor being associated with said ultraviolet light source.

[0025] In one aspect, in combination with any of the cleaning system examples above or below, the cleaning system includes wherein the sensor is of a type selected from a temperature sensor, a pressure sensor, a timer, and combinations thereof.

[0026] The present disclosure provides a cleaning method, which in some embodiments includes detecting a first triggering event by a sensor associated with an ultraviolet (UV) cleaning system, and executing, by a processor, a cleaning program for cleaning a target in response to detecting the first triggering event. In one embodiment, executing the cleaning program includes activating an ultraviolet light source of the ultraviolet cleaning system for a predetermined period, the ultraviolet light source configured to emit ultraviolet light in a wavelength range of about 222 nm to about 300 nm to clean the target.

[0027] In one aspect, in combination with any example method described above or below, after executing the cleaning program, a contact element coupled to the target is activated.

[0028] In one aspect, in combination with any method example above or below, the method further includes storing a first time associated with detecting the first triggering event and a second time associated with executing the cleaning program in a data store, the data store wirelessly communicating with the ultraviolet cleaning system.

[0029] In one aspect, in combination with any method example above or below, activating the ultraviolet light source includes causing the ultraviolet light source to emit ultraviolet light to clean at least one surface of the plurality of surfaces of the target.

[0030] In one aspect, in combination with any above or below method example, the method further comprises reflecting the ultraviolet light received from the ultraviolet light source with a reflector coupled to the target.

[0031] In one aspect, in combination with any method example above or below, the method further includes configuring the ultraviolet light source to emit the ultraviolet light to clean a first surface of the target's multiple surfaces, and configuring the reflector to reflect the ultraviolet light through a second surface of the target's multiple surfaces to clean the second surface.

[0032] In one aspect, in combination with any method example above or below, the method further comprises executing the cleaning program further comprising activating the ultraviolet light source for the predetermined period of time, the ultraviolet light source configured to emit a predetermined range of wavelengths to clean multiple targets within a predetermined proximity from the ultraviolet light source.

[0033] In one aspect, in combination with any method example above or below, the method further comprises the first trigger event being a predetermined time associated with a schedule, activation of a contact element associated with a target, a predetermined time associated with a previous ultraviolet light emission from the ultraviolet light source, or a combination thereof. [Brief explanation of the drawings]

[0034] In order that the above-recited features may be understood in detail, what has been briefly summarized above will now be described in more detail by reference to illustrative embodiments, some of which are illustrated in the accompanying drawings.

[0035] [Figure 1] FIG. 1 illustrates an example of a cleaning system according to aspects of the present disclosure. [Figure 2] FIG. 1 shows a flowchart of a cleaning method according to an aspect of the present disclosure. [Figures 3A-3D] 1 is a diagram illustrating an example configuration of a cleaning system according to an aspect of the present disclosure. [Figures 4A-4F] 1A-1D illustrate various configurations of a cleaning system according to aspects of the present disclosure. [Figure 5] 1 is a cross-sectional view of a cleaning system including an ultraviolet light source located remotely relative to a target system, according to an aspect of the present disclosure. [Figures 6A-6C] FIG. 1 illustrates an example of a cleaning system according to aspects of the present disclosure. [Figures 7A-7E] FIG. 1 illustrates an example of a textured target according to aspects of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0036] The present disclosure relates to a cleaning system and method for using ultraviolet (UV) light to clean, e.g., disinfect, or sterilize, one or more surfaces of a target. The cleaning system can be deployed in a variety of "installed environments," including public or private transportation vehicles (e.g., aerospace vehicles such as aircraft, spacecraft, and ships, and non-aerospace transportation vehicles such as buses, automobiles, trains, and ships), retail stores, financial institutions, casinos, non-casino gaming environments (e.g., e-sports), and other locations. Cleaning, as described herein, may also include sterilization. As used herein, "sterilization" refers to the process of rendering one or more surfaces of a component free of bacteria, viruses, fungi, or other microorganisms. A target, as used herein, is formed from one or more materials that can be cleaned using ultraviolet light and is removably coupled to a contact element to provide a clean contact surface for a user upon use of the contact element. Thus, in some embodiments, such targets can be retrofitted, eliminating the need for and expense of replacing contact elements. As used herein, a "contact element" may be an active element that initiates an event, such as a door opening or closing, a toilet flushing, or a door locking or unlocking, or it may be a stationary element, such as a countertop or piece of furniture. A contact element without a target associated with it is one that many people may touch, as opposed to a non-touch or low-frequency touch surface, such as a ceiling or other hard-to-reach surface. Examples of such contact elements include seats, handles, levers, buttons, trash can lids, trays, counters, touchscreens (GUIs), keyboards, and game consoles. Such contact can spread dirt, bacteria, viruses, fungi, mold, mildew, and other undesirable elements between contact elements, between users of these contact elements, and between non-users who come into contact with users of these contact elements. In some examples, such contact elements are found in aerospace vehicles, such as commercial aircraft, and are stationary elements, such as countertops.Touch elements also include components in aircraft cabins, crew areas, cockpits, and other personal or commercial transportation vehicles; banking systems (ATMs); point-of-sale (POS) kiosk touchscreens, keypads, and card readers; and other surfaces or combinations of surfaces in retail stores, shopping malls, schools, offices, rental cars, rideshares, housing-shares, financial institutions, automated teller machines (at financial institutions or other locations), and gaming systems. As used herein, a "gaming system" refers to a system configured for gambling in a casino or for non-gambling environments, such as all-ages arcades and home systems, and includes e-sports systems. Additionally, the systems and methods described herein are contemplated for use in other touch elements used in businesses, such as hospitals, hotels / motels / resorts, or other locations. Thus, contact elements that may be removably coupled to a target may also include desktops, countertops, keyboards, computer mice, kiosk or mobile device touchscreens / GUIs, other parts of mobile devices or mobile device cases, clothes hangers, seats, cutlery, dishware, glassware, and other items with surfaces that may be touched by many people during use.

[0037] The target may include, for example, one or more surfaces to which an ultraviolet light source may be directed in order to clean the one or more surfaces. In some embodiments, one or more reflectors or absorbers may be used to direct and / or reflect the ultraviolet light toward the target. The target may be marked with a label such as "UV Cleaned," a graphic symbol (e.g., an acrylic label), or a combination of letters and symbols to indicate that the target has been cleaned with ultraviolet light. In some examples, ultraviolet light may be used alone, and in other examples, ultraviolet light may be used in combination with one or more cleaning solutions to remove contaminants such as dirt and oil, and biological elements such as viruses and bacteria, and to prevent the transmission of biological contaminants between users of high-touch surfaces.

[0038] The contact element can be removably coupled to a target formed of a UV-transparent material. As used herein, "UV-transparent" with respect to a target material refers to a material that is transparent (capable of transmitting) at least a predetermined percentage (%) of ultraviolet (UV) radiation within a predetermined wavelength. As used herein, "about" means within a range of plus or minus 5% of a stated value, maximum, or minimum value. For example, a target with X% UV transparency transmits X% of wavelengths within a predetermined wavelength range. This predetermined wavelength range is described below.

[0039] As used herein, "removably coupled" means that the target can be coupled and decoupled to the contact element without damaging the contact element. In some examples, the target can be decoupled from the contact element without damaging the target. This removably coupled connection allows the target to be replaced if damaged, as part of a regular maintenance schedule, or when the target is refurbished to reflect a brand change, update, or cleanliness indication. The removably coupled target to the contact element can be achieved by using adhesives; mechanical coupling with snaps, clips, hook-and-loop fasteners, threads, or nails; magnetic coupling; or a combination of various couplings. In some examples, the target is removably coupled to the contact element by a direct coupling, where the target directly contacts the contact element. In such examples, if the contact element is an active element, applying a force to the target causes the contact element to perform the actions described herein.

[0040] In other embodiments, the target is removably coupled to the contact element through an intermediate element, and the target and contact element each directly contact the intermediate element but not each other. The intermediate element can be formed from a variety of materials selected so as not to damage either the target or the contact element. In such embodiments, if the contact element is an active element, application of a force to the target causes the intermediate element to apply a force to the contact element, which then performs the operations described herein.

[0041] In yet another embodiment, the target can be removably coupled to a fixture, which can be directly and removably coupled to the contact element or other configurations. This embodiment may or may not use an intermediate element. The fixture can be configured in various ways, as described below, such that application of a force to the target causes the fixture to apply a force to the contact element, which then performs the operations described herein. In some embodiments, the target can include one or more reflectors or absorbers removably or permanently coupled to the target. In other embodiments, one or more reflectors or absorbers can be incorporated within the target. Reflectors and / or absorbers can be used to direct light to one or more surfaces of the target, as described below. In some embodiments, one or more reflectors or absorbers can be coupled to or positioned relative to the ultraviolet light source to direct ultraviolet radiation from the ultraviolet light source.

[0042] Cleaning systems including targets described herein can be configured in various ways. In some embodiments, the ultraviolet light is turned on continuously, for example, until the ultraviolet target is removed and replaced. Thus, as used herein, "continuously on" refers to a system configured to continuously clean an ultraviolet target by turning on (activating) the ultraviolet light source for one or more predetermined periods within a 24-hour period, encompassing the period during which multiple users are touching the target. In some examples, continuous on includes the ultraviolet light source being activated to continuously clean the target 24 hours a day, or while the environment in which the target is located is operational, or while the target is in a presence of people. Continuous on can be employed, for example, to clean targets associated with contact elements such as touchscreens (GUIs), countertops, tabletops, or other surfaces, where it is more beneficial for a business to continuously clean the associated target to maintain its cleanliness.

[0043] The continuous illumination embodiment is in contrast to other embodiments, such as discontinuous or periodic illumination, in which the ultraviolet light source is manually or automatically turned on and off for predetermined periods of time at various intervals according to a schedule. In yet another embodiment, which may be combined with other embodiments herein, the discontinuous illumination embodiment includes a cleaning system in which the ultraviolet light source is turned on (activated) by one or more triggers determined by one or more sensors associated with the cleaning system.

[0044] As described herein, a sensor or other system component can be "associated" with any other component of a cleaning system by being removably coupled, permanently coupled, or integrally formed with that component to detect one or more triggering events. A "permanently coupled" component, such as a sensor, is one that is fabricated separately from the cleaning system and then coupled to the cleaning system for multiple uses, but cannot be removed from the cleaning system without damaging the cleaning system. An "integral" component of a cleaning system also includes integral components of a target or ultraviolet light source, such as a reflector or absorber, that can be molded, cast, or otherwise incorporated into the cleaning system or a component thereof. <Example of cleaning system>

[0045] FIG. 1 illustrates a cleaning system 100 according to an embodiment of the present disclosure. The cleaning system 100 includes an ultraviolet light source 102 configured to emit ultraviolet light within a predetermined wavelength range toward a target 104. The target 104 is removably coupled to a contact element 112. In one example, the predetermined wavelength range is from about 200 nanometers (nm) to about 400 nm. In another example, the predetermined wavelength range is from about 200 nm to about 230 nm. In another example, the predetermined wavelength range is from about 222 nm to about 254 nm. In yet another example, the predetermined wavelength range is from about 235 nm to about 280 nm. In yet another example, the predetermined wavelength range is from about 315 nm to about 400 nm.

[0046] The ultraviolet light source 102 can be configured in a variety of forms and may or may not include one or more reflectors or absorbers to direct the ultraviolet light toward the target 104. In one example, the ultraviolet light source 102 comprises a mercury lamp. In another example, the ultraviolet light source 102 includes a plurality of light emitting diodes (LEDs). In yet another example, the ultraviolet light source 102 is an excimer lamp.

[0047] In some examples, the target 104 can be formed from a material that has at least 20% UV transmittance over the predetermined wavelength range emitted by the UV light source 102. In other examples, the target 104 can be formed from a material that has at least 30% UV transmittance over the predetermined wavelength range emitted by the UV light source 102. In other examples, the target 104 can be formed from a material that has at least 40% UV transmittance over the predetermined wavelength range emitted by the UV light source 102. The target 104 can be formed from silicon glass (Si-glass), quartz, or other materials that have a predetermined percentage of UV transmittance over the predetermined wavelength range. In embodiments, the target 104 comprises glass that has a transmittance of about 85% or greater, about 85% to about 99.99%, about 90% to about 99.50%, about 95% to about 99.15%, or about 99% to about 99.15% over any of the wavelength ranges described herein, including 222 nm. An example of a suitable glass is a borosilicate glass such as Corning® 7980.

[0048] The target 104 can have associated therewith or etched therein indicia, such as letters, graphics, or a combination thereof (e.g., an acrylic label), indicating that the target 104 has been UV cleaned. The target 104 can be removably associated with the contact element 112, allowing it to be removed and replaced according to a maintenance schedule or if damaged. In another example, the target 104 can be decoupled from the contact element 112 if the contact element 112 is damaged, and the target 104 can then be recoupled to a different contact element or to the same contact element 112 after repair / refurbishment.

[0049] The target can be removably and directly coupled to the contact element 112 using adhesives (e.g., pressure or heat adhesives); mechanical couplings such as snaps, clips, hook-and-loop fasteners, threads, or nails; magnetic couplings; or a combination of various couplings. The target 104 can have a variety of shapes, as described below, and can have a thickness of from about 0.2 millimeters (mm) to about 20 centimeters (cm). As described above, the target 104 can also be removably coupled to a component 106, such as an intermediate element or a movable fixture, as described below. When the component 106 is used in conjunction with the target 104 and the contact element 112, application of a force to the target 104 causes movement of the component 106, which in turn causes movement of the contact element 112. The contact element 112 can be, for example, a static or active element, as described above, and can be formed from one or more of a polymer, elastomer, metal, alloy, organic material, composite material, or a combination of these materials.

[0050] The cleaning system 100 may further include one or more sensors 110, a server computer 108 having non-transitory media configured to store executable logic, a mobile device 116, and one or more data stores 114. The logic may include at least one cleaning program. Each cleaning program may include parameters, such as which ultraviolet light source 102 to activate if the cleaning system 100 includes multiple ultraviolet light sources 102, a predetermined duration for the ultraviolet light source 102 to be activated, a predetermined wavelength or range of wavelengths emitted by the ultraviolet light source 102, one or more triggers associated with activating or deactivating the ultraviolet light source 102, a continuous light indication, and / or other parameters depending on the configuration and use of the cleaning system 100. In some embodiments of the present disclosure, executed cleaning programs and usage of the cleaning system 100, including execution parameters such as execution time and other factors, may be stored in a data store for further analysis. The stored data may be used, for example, to improve or modify cleaning programs or to develop additional cleaning programs.

[0051] One or more sensors 110 can be configured to detect a triggering event, and at least one cleaning program is configured to emit ultraviolet light from the ultraviolet light source 102 in response to the sensor 110 detecting the triggering event. In one embodiment, the sensor 110 is associated with the target 104. In another embodiment, the sensor 110 is associated with the ultraviolet light source 102. The sensor can be associated with one or both of the target 104 or the ultraviolet light source 102 by being removably coupled, permanently coupled, or integrally formed with the target 104 or the ultraviolet light source 102. In some embodiments, the sensor 110 can be coupled to a reflector or absorber that is coupled, located nearby, or integrally formed with the target 104 or the ultraviolet light source 102. In another embodiment, the sensor 110 can be a separate, remote element configured to detect use of the target or other triggering event. Depending on the embodiment, the sensor 110 can be one or more of a temperature sensor, a pressure sensor, a timer, and combinations thereof.

[0052] The mobile device 116 may be, for example, a phone, a tablet, wearable technology (such as a watch, jewelry, a heads-up display, clothing, eyeglasses, etc.), a personal data assistant, a laptop, or a hybrid device. The mobile device 116 may be used to activate the cleaning system 100 and to record and analyze the operation of the cleaning system 100 by communicating with the server computer 108 and / or the data store 114. <Example of how to use the cleaning system>

[0053] Figure 2 shows a flowchart of a cleaning method 200. In step 202, a triggering event is detected (202 - detect triggering event) by a sensor associated with an ultraviolet cleaning system, for example, the cleaning system may be similar to the cleaning system of Figure 1. In step 204, in response to detecting this first triggering event, a cleaning program is executed (204 - execute cleaning program) to clean a target removably coupled to a contact element. As noted, the target may be removably coupled to the contact element directly, using an intermediate element, using a fixture, or a combination thereof.

[0054] Executing the cleaning program in step 204 includes activating an ultraviolet light source of the ultraviolet cleaning system for a predetermined period of time. In step 206, the target is cleaned when the ultraviolet light source emits ultraviolet light toward the target (206—CLEAN TARGET). As described, the ultraviolet light source is configured to emit ultraviolet light in a predetermined wavelength range to clean at least one of the target's multiple surfaces. In some examples, the predetermined wavelength range is, for example, from about 200 nm to about 360 nm. In other examples, the predetermined wavelength range is, for example, from about 210 nm to about 320 nm. In some examples, the predetermined wavelength range is, for example, from about 222 nm to about 300 nm. A triggering event may include, for example, a sensor detecting a temperature increase or decrease within a predetermined distance from the target or ultraviolet light source, a pressure sensor detecting use of the target and the underlying contact element, a predetermined time associated with a schedule, activation of a contact element associated with the target, a predetermined time associated with a previous ultraviolet emission from the ultraviolet light source, and combinations thereof.

[0055] In some embodiments, if a reflector is coupled to the target, step 206 further includes reflecting the ultraviolet light received from the ultraviolet light source with the reflector. In this embodiment, the ultraviolet light source is configured to emit ultraviolet light to clean a first surface of the target's multiple surfaces. Further, in this embodiment, the one or more reflectors can be configured to reflect the ultraviolet light back to the first surface to re-clean the first surface. In some embodiments, which may be combined with other embodiments herein, the reflector can be configured to reflect light to a second surface of the multiple surfaces to clean the second surface.

[0056] In some embodiments, step 204 further includes storing a first time associated with the detection of the first triggering event and a second time associated with the execution of the cleaning program in a data store, the data store being in wireless communication with the ultraviolet cleaning system. In some embodiments, executing the cleaning program in step 204 further includes activating an ultraviolet light source for a predetermined period of time, the ultraviolet light source being configured to emit a predetermined range of wavelengths to clean multiple targets within a predetermined proximity from the ultraviolet light source.

[0057] Further, in method 200, after executing the cleaning program, a contact element coupled to the target is activated (208—activate contact element under target) in step 208. After activating the contact element in step 208, the contact element is released (210—release contact element under target) in step 210. If the contact element is an active element, activation by the target in step 208 may result in movement of a lever, activation of a button, activation of a portion of a touchscreen / GUI, or other action. If the contact element is a stationary element, activation by the target in step 208 may include, for example, a user touching the target with a hand / arm, a stylus, or other implement. If the contact element is an active element, release of the target in step 210 may occur, for example, in response to completion of a given action. If the contact element is a stationary element, release of the target in step 210 may include, for example, a user removing their hand / arm or stylus from the target.

[0058] In some embodiments, the cleaning program executed in step 204 can continuously activate the ultraviolet light source. In this embodiment, in method 200, the target is continuously cleaned with ultraviolet light while repeatedly activating and deactivating the contact element with the target multiple times, as indicated by the arrow from step 210 to step 206. In other embodiments, the cleaning program executed in step 204 can activate and deactivate the ultraviolet light source in response to a triggering event. That is, the ultraviolet light source remains activated to continue cleaning the target until any second triggering event occurs in step 212 (212—SECOND TRIGGER EVENT DETECTED). The ultraviolet light source can be deactivated in step 214 (214—UV LIGHT SOURCE STOP), after which it can be activated again in response to a further triggering event, as indicated by the arrow from step 212 to step 202. In some embodiments, in step 216, a plurality of data related to the execution of the cleaning program in step 204, as well as other data related to any or all of steps 206-214, may be stored in a data store, such as data store 114, for later analysis or use, including predictive modeling (216—storing data related to cleaning).

[0059] The second triggering event in step 212 may be, for example, a sensor detecting a temperature increase or decrease within a predetermined distance of the target or ultraviolet light source, a pressure sensor detecting use of the target and the contact element thereunder, a predetermined time associated with a schedule, activation of a contact element associated with the target, a predetermined time associated with a previous ultraviolet emission from the ultraviolet light source, and combinations thereof. In other embodiments, the ultraviolet light source may remain active to provide continuous cleaning until maintenance is scheduled for the cleaning system in step 206 or until the environment in which the target is located is closed (e.g., a store is closed, an aircraft is grounded overnight), at which point the ultraviolet light source is shut down in step 214.

[0060] The targets and contact elements described above can take on a variety of configurations, combinations of configurations, and types of releasable connections, as shown in Figures 3A-3D and described below. <Example of assembly of target and contact element>

[0061] 3A-3D illustrate target and contact element assemblies according to embodiments of the present disclosure. FIG. 3A illustrates a first assembly 300A including a first target 302 removably coupled to a first contact element 304. The first target 302 is in direct contact with the first contact element 304, with a first surface 302A of the first target 302 directly coupled to a first surface 304A of the first contact element 304. The removably coupled first target 302 and first contact element 304 can be achieved by using adhesives (e.g., pressure or heat adhesives), mechanical couplings using snaps, clips, hook-and-loop fasteners, threads, or nails, magnetic couplings, or a combination of various couplings. Thus, the first target 302 can be disconnected from the first contact element 304 and repaired or replaced without damaging the first contact element 304. The first assembly 300A can be used in locations without space constraints, for example, when the contact elements are configured to directly contact the target. A space-free installation environment is one configured to allow a target (e.g., first target 302) to be coupled, in this case directly coupled, to a contact element (e.g., first contact element 304) without interfering with a user's access to the installation environment of first assembly 300A. For example, first assembly 300A can be used in an installation environment where first contact element 304 is a button, a door handle, a lever, a component of a gaming system, or a touch screen (GUI).

[0062] 3A, the second surface 304B of the first contact element 304 can be aligned along a common plane with the second surface 302B of the first target 302. In other embodiments, the first target 302 can be configured and aligned differently relative to the first contact element 304, where the coupling of the first target 302 to the first contact element 304 is configured such that a user wishing to perform a given function via the first contact element 304 (e.g., actuating a button, handle, lever, or other contact element to open a door, open a chute (e.g., a trash can with rollers and wheels), flush a toilet (e.g., a flush button), press a button (e.g., a soap dispenser cap), perform a banking function, etc.) can perform the function by touching the first target 302 without having to touch the first contact element 304. Additionally, although first target 302 is shown as rectangular in FIG. 3A, in other embodiments, first target 302 can take the form of a triangle or other polygon, a circle, a sphere, a cone, or any other shape or combination of shapes.

[0063] FIG. 3B illustrates a second assembly 300B including a second target 308 removably coupled to a first contact element 304. The second assembly 300B employs a first intermediate element 306. The first intermediate element 306 may be used, for example, in space-limited locations to improve access for a user wishing to activate the first contact element 304. In another example, the first intermediate element 306 may be used in combination with the second target 308 to facilitate cleaning of the second target 308, for example, by the relative positioning of an ultraviolet light source (not shown). In yet another example, the first intermediate element 306 may be used to improve access to the second target 308 for users of various mobility abilities. The first intermediate element 306 may be positioned in direct contact with each of the first contact element 304 and the second target 308. In this example, the first intermediate element 306 is removably coupled directly to the first surface 304A of the first contact element 304. In another embodiment, the first intermediate element 306 can be slidingly engaged with the first surface 304A of the first contact element 304 and configured to roll or slide along the first surface 304A. Further, in this embodiment, the first intermediate element 306 can be removably coupled directly to the first surface 308A of the second target 308. In this embodiment, application of a force to the second target 308 causes the first intermediate element 306 to apply a force to the first contact element 304, causing the first contact element 304 to perform the operation described above. The first intermediate element 306 can be formed from, for example, a fluorocarbon, polytetrafluoroethylene (PTFE), a polymer, an elastomer, a metal, a composite material, or an organic material (e.g., wood), with or without a coating. The first intermediate element 306 may be removably coupled to each of the first contact element 304 and the second target 308 by similar or different types of coupling means, including the use of one or more adhesives (e.g., pressure or heat adhesives), mechanical couplings such as snaps, clips, hook-and-loop fasteners, threads, or nails, magnetic couplings, or combinations of these various couplings, where the adhesive is positioned so as not to interfere with the use of an ultraviolet light source, for example, to clean the targets.

[0064] The second target 308 can be decoupled from the first intermediate element 306 and repaired or replaced without damaging the second target 308 or the first intermediate element 306. In one embodiment, the second surface 304B of the first contact element 304 can be aligned along a common plane with the second surface 308B of the second target 308, as shown in FIG. 3A . In other embodiments, the second target 308 can be configured to be aligned along a different plane than the first contact element 304 and can cover the first contact element 304 such that a user wishing to perform a given function via the first contact element 304 (e.g., activate a button, handle, lever, or other contact element to open a door, open a chute, flush a toilet, perform a banking function, etc.) can do so by touching the second target 308 without having to directly touch the first contact element 304. Additionally, although second target 308 is shown as rectangular in FIG. 3B, in other embodiments, second target 308 can take the form of a triangle or other polygon, a circle, a sphere, a cone, or any other shape or combination of shapes.

[0065] FIG. 3C illustrates a third assembly 300C including a third target 312 removably coupled to a second contact element 314, illustrating the use of a second intermediate element 310 for a differently shaped third target 312 and second contact element 314 than the embodiments described above and below. The second intermediate element 310 may be used, for example, in space-limited locations to improve access for a user wishing to activate the second contact element 314. In another example, the second intermediate element 310 may be used in combination with the third target 312 to facilitate cleaning of the third target 312, for example, by the relative positioning of an ultraviolet light source (not shown). In yet another example, the second intermediate element 310 may be used to improve access to the third target 312 for users of various mobility abilities. The second intermediate element 310 may be positioned in direct contact with each of the second contact element 314 and the third target 312. In this embodiment, the first intermediate element 306 is directly and removably coupled to the first surface 314A of the second contact element 314 and the first surface 312A of the third target 312, and when a force is applied to the third target 312, the second intermediate element 310 applies a force to the second contact element 314, which then performs the operation described above.

[0066] The second intermediate element 310 is shown in FIG. 3C as having a crescent-shaped cross-section. The second intermediate element 310 can contact the first surface 312A of the third target 312 via the first contact 310A and the second contact 310B. In one embodiment of the third assembly 300C, a plurality of user-visible etchings (not shown here) can be formed on the first surface 312A of the third target 312 between the first contact 310A and the second contact 310B. The second intermediate element 310 can be formed from a fluorocarbon, a polymer, an elastomer, a metal, a composite material, an organic material (e.g., wood), or a combination thereof, and may or may not include a coating. The first intermediate element 306 may be removably coupled to each of the second contact element 314 and the third target 312 by similar or different types of coupling means, examples of which include the use of adhesives (e.g., pressure or heat adhesives), mechanical couplings using snaps, clips, hook-and-loop fasteners, threads or nails, magnetic couplings, or combinations of these various couplings.

[0067] The third target 312 can be disconnected from the first intermediate element 306 and repaired or replaced without damaging the third target 312 or the first intermediate element 306. The third target 312 and the second contact element 314 are configured so that the third target 312 covers the second contact element 314 so that a user wishing to perform a given function via the second contact element 314 (e.g., activate a button, handle, lever, or other contact element to open a door, open a chute, flush a toilet, perform a banking function, etc.) can do so by touching the third target 312 without having to directly touch the second contact element 314. The third target 312 is shown in FIG. 3C as having a circular, disk-like shape. However, in other embodiments, the third target 312 can take the form of a triangle or other polygon, a circle, a sphere, a cone, or any other shape or combination of shapes.

[0068] 3D illustrates a fourth assembly 300D including a fourth target 316 removably coupled to a third contact element 318, shown with a first fixture 320. The first fixture 320 may be used, for example, in space-limited locations to improve access for a user wishing to activate the third contact element 318. In another example, the first fixture 320 may be used in combination with the fourth target 316 to facilitate cleaning of the fourth target 316, for example, by the relative positioning of an ultraviolet light source (not shown). In yet another example, the first fixture 320 may be used to improve access to the fourth target 316 for users of various mobility abilities. The first fixture 320 may be positioned in direct contact with each of the third contact element 318 and the fourth target 316.

[0069] In the fourth assembly 300D, the first fixture 320 is directly and removably coupled to the first contact point 318A of the third contact element 318 and the first contact point 316A of the fourth target 316, such that application of a force to the fourth target 316 moves the first fixture 320, which in turn causes the fourth target 316 to apply a force directly to the third contact element 318, causing the third contact element 318 to perform the motion described above. In other embodiments, an intermediate element (not shown here) may be used in combination with the first fixture 320 to cause application of a force to the fourth target 316 to move the first fixture 320. Movement of the first fixture 320 applies a force to the third contact element 318, which in turn moves the third contact element 318. As shown here, application of a force to the fourth target 316 in the direction of the arrow can move the third contact element 318 in a direction perpendicular to the arrow. In other examples, depending on various factors, including the function of the third contact element 318, the first fixture 320 can cause movement of the third contact element 318 in various directions by applying forces to the fourth target 316 in other directions.

[0070] The first fixture 320 can be formed from a fluorocarbon, polymer, elastomer, metal, composite, organic material (e.g., wood), or combinations thereof, with or without a coating. The first fixture 320 can be configured with pivots, springs, slides, magnets, or other features or combinations of features that can be configured to cause movement of the first fixture 320 and ultimately activation of the third contact element 318 when a force is applied to the fourth target 316 in one or more directions. The first fixture 320 can be removably coupled to each of the third contact element 318 and the fourth target 316 by similar or different types of coupling means, including the use of adhesives (e.g., pressure or heat adhesives), mechanical couplings using snaps, clips, hook-and-loop fasteners, threads, or nails, magnetic couplings, or combinations of these various couplings.

[0071] Fourth target 316 can be disconnected from first fixture 320 and repaired or replaced without damaging fourth target 316 or first fixture 320. Fourth target 316 and third contact element 318 are configured so that fourth target 316 covers third contact element 318 such that a user wishing to perform a given function via third contact element 318 (e.g., activate a button, handle, lever, or other contact element to open a door, open a chute, flush a toilet, perform a banking function, etc.) can do so by touching fourth target 316 without having to directly touch third contact element 318. Furthermore, although fourth target 316 is shown in FIG. 3D as being spherical, in other embodiments, fourth target 316 can take the form of a triangle or other polygon, a circle, a sphere, a cone, or any other shape or combination of shapes. <Example of UV light source and target configuration>

[0072] 4A-4F illustrate various configurations of a target and ultraviolet light source of a cleaning system according to embodiments of the present disclosure. FIG. 4A illustrates a first configuration 400A of an ultraviolet light source 404 and a target 402. The ultraviolet light source 404 may optionally include a first sensor 414A, for example, similar to the sensor 110 described above in FIG. 1. The target 402 includes a first surface 402A opposite a second surface 402B, a third surface 402C opposite a fourth surface 402D, and a fifth surface 402E opposite a sixth surface 402F. The target 402 and ultraviolet light source 404 illustrated in FIGS. 4A-4F are depicted as rectangular. However, in other aspects of the cleaning systems described herein, one or both of the target 402 and the ultraviolet light source 404 may be formed in other shapes or combinations of shapes, such as other polygons, triangles, circles, domes, spheres, ellipses, crescents, etc., and the ultraviolet light source 404 may be configured to emit ultraviolet light toward one or more faces of the target 402.

[0073] In some embodiments, instead of or in addition to the first sensor 414A associated with the ultraviolet light source 404, the target 402 includes a second sensor 414B. The target 402 can further include indicia 406, for example, etched on or coupled to the sixth surface 402F. The indicia 406 can include, for example, text, graphics, or a combination of text and graphics, indicating that the target 402 has been ultraviolet cleaned. In some examples, the indicia 406 can further include brand identity associated with the manufacturer of the target 402, the owner of the environment in which the target 402 is located, or other brand, as appropriate.

[0074] In the embodiment shown in FIG. 4A , the ultraviolet light source 404 is positioned along a plane shared with the target 402, and ultraviolet light emitted from the ultraviolet light source 404 is directed through the third surface 402C and through the target 402 in the y-direction, thereby allowing each surface (402A-402F) to be cleaned by the ultraviolet light source 404. In other embodiments described herein, the ultraviolet light source 404 and / or the target 402 may be positioned such that some, but not all, of the surfaces of the target 402 are cleaned by the ultraviolet light source. In still other embodiments described herein, the ultraviolet light source 404 and / or the target 402 may be positioned such that two or more, but not all, of the surfaces of the target 402 are cleaned by the ultraviolet light source. In these embodiments, more than one surface of the target 402 may be cleaned by the ultraviolet light, for example, using one or more additional elements to direct ultraviolet light from the ultraviolet light source 404 toward or through various surfaces of the target 402.

[0075] 4B illustrates a second configuration 400B of a UV light source 404 and a target 402. The target 402 includes a first side 402A opposite the second side 402B, a third side 402C opposite the fourth side 402D, and a fifth side 402E opposite the sixth side 402F. The target 402 can further include indicia 406, for example, etched into or coupled to the sixth side 402F. The indicia 406 can include, for example, text, graphics, or a combination of text and graphics indicating that the target 402 has been UV cleaned. In some examples, the indicia 406 can further include brand identity associated with the manufacturer of the target 402, the owner of the environment in which the target 402 is located, or other appropriate brand or indicia.

[0076] The ultraviolet light source 404 further includes an ultraviolet light source reflector 416 disposed around the ultraviolet light source 404. In the example shown in FIG. 4B , the ultraviolet light source 404 is disposed along a plane shared with the target 402, and ultraviolet light emitted from the ultraviolet light source 404 is directed to pass through the target 402 in the x-direction through the fifth surface 402E. The ultraviolet light source reflector 416 can be formed of a porous material described herein configured to direct light toward the fifth surface 402E of the target 402, thereby allowing the ultraviolet light emitted from the ultraviolet light source 404 to clean the fifth surface 402E, which may subsequently be touched by a user. In one embodiment, the ultraviolet light source reflector 416 can be formed of a fluoropolymer. In another embodiment, the ultraviolet light source reflector 416 can be formed of a material including a plurality of pores, each of which has a maximum diameter smaller than the smallest wavelength emitted by the ultraviolet light source 404.

[0077] In this example, the sixth surface 402F may also be cleaned by the ultraviolet light source 404, while other surfaces may not be cleaned. The various ultraviolet light source and target configurations described herein can be selected to clean various surfaces of the target that a user may touch, while not cleaning surfaces that a user may not touch. Non-user-touchable surfaces may include surfaces flush with a wall or other surface, surfaces coupled to a contact element, or other surfaces, depending on the configuration. Although not shown in FIG. 4B , one or more sensors may be provided on or coupled to the ultraviolet light source 404 or target 402, or may be located remotely within the environment in which the second configuration 400B is installed.

[0078] 4A and 4B, the ultraviolet light source 404 is not directly coupled to the target 402. Rather, the ultraviolet light source 404 may be remotely located relative to the target 402. In some embodiments, the ultraviolet light source 404 may be configured to emit ultraviolet light to clean one or more surfaces of the target 402 in response to a triggering event detected by a sensor (414A, 414B) or in response to a manual command. Remotely locating the ultraviolet light source 404 relative to the target 402 allows for a variety of distances from the ultraviolet light source 404 to the target 402. This distance may vary, for example, from a few inches to several feet, depending on the type of contact element, the type of ultraviolet light source 404, the shape of the target 402 or contact element, the type of installation environment, or other factors or combinations of factors.

[0079] 4C illustrates a third configuration 400C of the ultraviolet light source 404 and target 402. The target 402 and indicia 406 are similar to those described above in FIGS. 4A and 4B. The ultraviolet light source 404 is removably coupled to a third surface 402C of the target 402. The third configuration 400C, in which the ultraviolet light source 404 is removably coupled to the target 402, can be employed when the environment in which the cleaning system is installed allows for this configuration, such as when the ultraviolet light source 404 is configured to illuminate continuously rather than for discrete periods between uses, for a predetermined period, or in response to some other trigger.

[0080] Depending on the embodiment, the target reflector 418 can be removably or permanently coupled to or integrally formed with the fourth surface 402D of the target 402. In one example, the target reflector 418 can be formed from a fluoropolymer. In another embodiment, the target reflector 418 can be formed from a material including a plurality of pores, each of which has a maximum diameter smaller than the smallest wavelength emitted by the ultraviolet light source 404. The ultraviolet light emitted from the ultraviolet light source 404 is irradiated along the x-axis and reflected by the target reflector 418. Depending on the embodiment, the target reflector 418 can have a smooth surface facing the ultraviolet light source 404 or a textured surface facing the ultraviolet light source. If the target reflector 418 includes a textured surface, the reflector reflects ultraviolet light irradiated through, for example, the third surface 402C and / or the fifth surface 402E through one or more of the surfaces (402A, 402B, 402F). In another example, the target reflector 418 can be positioned along the z-axis, as shown in FIG. 4D . In yet other examples, which may be combined with other examples herein, the target reflector 418 can be curved or bent along the z-axis, x-axis, or y-axis, or a combination thereof, to direct UV light emitted through the third surface 402C and / or the fifth surface 402E through one or more surfaces (402A, 402B, 402F). As described above, one or more sensors (414A, 414B) can be installed and coupled to the UV light source 404 or the target 402, or can be remotely located within the environment in which the configuration 400B is installed, and configured to activate and / or deactivate the UV light source 404.

[0081] The surfaces (402A-402F) of the target 402 can be configured as smooth surfaces, where a "smooth" surface is one that allows UV light to pass through but does not reflect UV light directed toward it. In other examples, one or more surfaces (402A-402F) can be configured with various patterns, such as chemical etching, machining, or other forms. Such etching may be part of indicia 406 (discussed above) that indicate the cleaning method and / or brand used to clean the target. In other examples, which may be combined with other examples herein, one or more surfaces (402A-402F) of the target 402 can be etched or otherwise patterned to direct UV light toward other surfaces of the target 402 to clean those surfaces. This is discussed below with reference to Figures 7A-7E.

[0082] FIG. 4D illustrates a fourth configuration 400D of the ultraviolet light source 404 and target 402. The fourth configuration 400D is similar to the first configuration 400A illustrated in FIG. 4A, with the ultraviolet light source 404 remotely located (e.g., not coupled) from the target 402. Depending on the embodiment, the target reflector 412 can be removably or permanently coupled to the fourth surface 402D of the target 402, or formed integrally therewith. The target reflector 412 can be configured to couple to the fourth surface 402D or other surfaces of the target, regardless of whether the surfaces are flat, curved, wavy, or have other shapes. In one example, the target reflector 412 can be formed from a fluoropolymer. In another embodiment, the target reflector 412 can be formed from a material including a plurality of pores, each of which has a maximum diameter smaller than the smallest wavelength emitted by the ultraviolet light source 404. The ultraviolet light emitted from the ultraviolet light source 404 can be irradiated along the x-axis and reflected by the target reflector 412. The target reflector 412 can have a smooth surface or a textured surface, depending on the embodiment. If the target reflector 412 includes a textured surface, the reflector reflects, for example, UV light irradiated through the third surface 402C and / or the fifth surface 402E through one or more surfaces (402A, 402B, 402F). In another embodiment, the target reflector 412 can be positioned along the z-axis, as shown in FIG. 4D . In yet another embodiment, possibly in combination with other embodiments herein, the target reflector 412 can be curved or bent along the z-axis, y-axis, or y-axis, or a combination thereof, and can be used to direct UV light irradiated through the third surface 402C and / or the fifth surface 402E through one or more surfaces (402A, 402B, 402F). As described above, one or more sensors 414A, 414B may be installed and coupled to the ultraviolet light source 404 or the target 402, or may be remotely located within the environment in which the second configuration 400B is installed, and configured to activate and / or deactivate the ultraviolet light source 404.

[0083] FIG. 4E illustrates a fifth configuration 400E of the ultraviolet light source 404 and the target 402. The fifth configuration 400E is similar to the third configuration 400C of FIG. 4C. The ultraviolet light source 404 is removably coupled to the third surface 402C of the target 402. Unlike FIG. 4C, the target 402 includes a target absorber 420 configured to absorb ultraviolet light emitted from the ultraviolet light source 404. The target absorber 420 can be removably or permanently coupled to or integrally formed with the fourth surface 402D of the target 402, depending on the embodiment. In one embodiment, the target absorber 420 can be formed from a fluoropolymer. In another example, the target absorber 420 can be formed from a material including a plurality of pores, each of which has a maximum diameter greater than the smallest wavelength emitted by the ultraviolet light source 404. As described above, one or more sensors (414A, 414B) may be installed and coupled to the ultraviolet light source 404 or the target 402, or may be remotely located within the environment in which the second configuration 400B is installed, and configured to activate and / or deactivate the ultraviolet light source 404. The fifth configuration 400E may be employed, for example, when a contact element (not shown) removably coupled to the target 402 is activated by a user touching one or more of the surfaces 402A, 402B, 402E, or 402F of the target 402. In this example, the third surface 402C may not be cleaned.

[0084] FIG. 4F illustrates a sixth configuration 400F of the ultraviolet light source 404 and target 402, similar to the third configuration 400C of FIG. 4C, except that the ultraviolet light source 404 is positioned remotely relative to the fifth surface 402E of the target 402. Thus, the ultraviolet light source 404 is configured to emit ultraviolet light through the fifth surface 402E. The target 402 in this configuration may include a light directing element 408. As used herein, the term "light directing element" 408 refers to a component used to direct ultraviolet light toward or away from the element. Thus, the light directing element 408 may be a reflector or an absorber, depending on the embodiment. The light directing element 408 may be removably or permanently coupled to or integrally formed with the fifth surface 402E of the target 402. In one example, the light directing element 408 may be formed from a fluoropolymer. In another example, the light directing element 408 is a reflector formed, for example, by a material including a plurality of pores, each of which has a maximum diameter smaller than the smallest wavelength emitted by the ultraviolet light source 404. The ultraviolet light emitted by the ultraviolet light source 404 can be emitted along the y-axis and reflected by the light directing element 408 through one or more of the target surfaces (402A, 402B, 402C, 402D) if the light directing element 408 has a textured surface configured to receive and reflect the ultraviolet light. Such reflection can also occur if the light directing element 408 is curved or bent along the z-axis, the y-axis, or the y-axis, or a combination thereof. In some embodiments, the light directing element 408 includes a textured surface and may further be bent or curved along one or more directions. The sixth configuration 400F can be employed, for example, when a user touches surfaces 402E, 402C, 402D, 402A, or 402B in various combinations using a contact element (not shown) removably coupled to target 402.For example, sixth configuration 400F can be employed when the contact element is a handle or lever, or when sixth surface 402F is in sliding engagement with another surface such that the user does not touch the sixth surface.

[0085] FIG. 5 illustrates a cross-section of a cleaning system 500 including an ultraviolet light source 504 remotely positioned relative to a target 502, according to an embodiment of the present disclosure. The ultraviolet light source 504 is configured to emit ultraviolet light toward a first surface 502A of the target 502. The target 502 is illustrated in FIG. 5 as having a rectangular cross-section. In other examples, the target 502 can have a cross-sectional shape that is another polygon, triangle, circle, oval, crescent, or other shape or combination of shapes. In this example, the first surface 502A is parallel to and opposite the second surface 502B. The distance between the target 502 and the ultraviolet light source 504 is not limited. In one example, the distance between the target 502 and the ultraviolet light source 504 is about 3 inches to about 24 inches. In another example, the distance between the target 502 and the ultraviolet light source 504 is about 6 inches to about 18 inches. In yet another example, the distance between the target 502 and the ultraviolet light source 504 is about 9 inches to about 12 inches. The third surface 502C of the target 502 is parallel to and opposite the fourth surface 502D. The target 502 includes a reflector 506 disposed between the first surface 502A and the second surface 502B. The reflector 506 is shown in cross section as having a curved shape, such that ultraviolet light emitted from the ultraviolet light source 504 toward the first surface 502A passes through the first surface 502A and is reflected toward the first surface 502A, the third surface 502C, and the fourth surface 502D, thereby cleaning at least the first surface 502A, the third surface 502C, and the fourth surface 502D. The reflector 506 is shown as curved toward the x-axis. In other examples, the reflector 506 may be bent or curved along the z-axis, the y-axis, or a combination of axes. The ultraviolet light-emitting surface 506A of the reflector 506 may be smooth. In another example, the UV-irradiating surface 506A of the reflector 506 can be textured to include various irregularities designed to direct UV light in different directions toward different sides of the target 502.

[0086] Depending on the curvature and / or texture of the reflector 506, the ultraviolet light may be reflected through other surfaces of the target 502 that are not shown in this figure. In some embodiments, the target 502 may be disassembled for maintenance or renovation so that the reflector 506 can be reused, or the entire target 502 and reflector 506 assembly may be replaced. In other embodiments, the ultraviolet light source 504 may be positioned at other locations relative to the target 502 to clean different surfaces of the target 502. <Cleaning system configuration example>

[0087] 6A-6C illustrate example cleaning systems according to embodiments of the present disclosure. FIG. 6A is a side view of a first cleaning system 600A including an ultraviolet light source 602, a reflector 608, a target 604, and an absorber 606. The target 604 is shown here as having a rectangular shape, such that a first surface 604A is parallel to and opposite a second surface 604B, and a third surface 604C is parallel to and opposite a fourth surface 604D. The third surface 604C and the fourth surface 604D are perpendicular to the first surface 604A and the second surface 604B, respectively.

[0088] The reflector 608 is positioned to direct ultraviolet light emitted by the ultraviolet light source 602 through the fourth surface 604D of the target 604 toward the first surface 604A, thereby cleaning at least the first surface 604A and the fourth surface 604D. In embodiments where the distance between the third surface 604C and the fourth surface 604D is the width 628 of the target 604, which is greater than the width 630 of the contact element 610, the ultraviolet light can also be reflected upward through the second surface 604B of the target 604, further cleaning the second surface 604B. The upper end 608A of the reflector 608 is substantially flush with the first surface 604A of the target, and the reflected ultraviolet light from the ultraviolet light source 602 cleans the first surface 604A. The target 604 is removably coupled to the contact element 610 via the second surface 604B of the target 604. Contact element 610 may be any of the contact elements described herein, such as, for example, a handle, a lever, a button, a touch screen, a counter, or any other type or combination of types of contact element.

[0089] The absorber 606 is disposed adjacent to the third surface 604C of the target 604. In some embodiments, the absorber 606 is removably coupled to the target, for example, by using an adhesive (e.g., a pressure or heat adhesive), a mechanical connection using snaps, clips, hook-and-loop fasteners, threads, or nails, a magnetic connection, or a combination of these various connections. The absorber 606 is configured to absorb ultraviolet light emitted from the ultraviolet light source 602. The thickness of the target 604 measured perpendicular to the first surface 604A can be from about 0.2 millimeters (mm) to about 20 centimeters (cm). In another example, the thickness of the target 604 measured perpendicular to the first surface 604A can be from about 0.2 mm to about 2 mm. In yet another example, the thickness of the target 604 measured perpendicular to the first surface 604A can be from about 1 mm to about 10 cm.

[0090] 6A can be used, for example, when the contact element 610 is a counter or other surface and a user is positioned on the same side of the system 600A as the third surface 604C and the absorber 606, which can be used to protect the user from reflected and emitted UV light. The first cleaning system 600A can be used when the UV light source 602 is configured to emit UV light continuously.

[0091] 6B is a side view of a second cleaning system 600B including an ultraviolet light source 602, a reflector 608, a target 604, a light directing element 612, and an absorber 614. The target 604 is shown here as having a rectangular side (cross-sectional) shape, such that a first surface 604A is parallel to and opposite a second surface 604B, and a third surface 604C is parallel to and opposite a fourth surface 604D. The third surface 604C and the fourth surface 604D are perpendicular to the first surface 604A and the second surface 604B, respectively.

[0092] The reflector 616 is positioned to direct ultraviolet light emitted by the ultraviolet light source 602 toward the first surface 604A of the target 604. The top end 616A of the reflector 616 is positioned above the first surface 604A of the target 604 by a distance 618 measured from the first surface 604A to the top end 616A of the reflector 616. In one example, the distance 618 can be from about 0.20 inches (in) to about 4.00 inches. In another example, the distance 618 can be from about 0.50 inches to about 2.50 inches. In yet another example, the distance 618 can be from about 0.75 inches to about 1.50 inches. The above-described position of the upper end 616A of the reflector 616 relative to the first surface 604A of the target 604 allows the ultraviolet light to strike the first surface 604A at an angle perpendicular to the first surface 604A, which differs from the shallow contact angle achieved by the coplanar reflector 608 in the first cleaning system 600A.

[0093] The first surface 604A is cleaned with ultraviolet light emitted and reflected from the ultraviolet light source 602. The target 604 is removably coupled to a contact element 610 via a second surface 604B of the target 604. The contact element 610 may be any of the contact elements described herein, such as a handle, a lever, a button, a touchscreen, a counter, or any other type or combination of types of contact element.

[0094] As a further difference from the first cleaning system 600A, the second cleaning system 600B includes an absorber 614 positioned parallel to the fourth surface 604D of the target 604. As shown in FIG. 6B , the absorber 614 is offset from the fourth surface 604D of the target, thereby reflecting a portion of the UV light emitted from the UV light source 602 through the fourth surface 604D while protecting at least the surface 610A of the contact element 610 from UV light. In one embodiment, the absorber 614 can be used to protect a user from UV light, for example, by preventing UV light from passing through the target 602 and exiting upward from the first surface 604A. In another embodiment, the absorber 614 can be used to prevent UV light from entering the target 604 through the second surface 604B of the target 604, for example, when the target 604 protrudes from the contact element 610 (e.g., when the target 604 and the contact element 610 have different shapes along the removable coupling surface). This configuration may be used, for example, when contact element 610 is made of a material that is sensitive to direct exposure to ultraviolet light, or when the user may come into a position where ultraviolet light may strike them.

[0095] The second cleaning system 600B may further include a light directing element 612 disposed adjacent to the third surface 604C of the target 604. In some embodiments, the light directing element 612 is removably coupled to the target, for example, by using an adhesive (e.g., a pressure or heat adhesive); a mechanical connection using snaps, clips, hook-and-loop fasteners, threads, or nails; a magnetic connection; or a combination of these various connections. In one embodiment, the light directing element 612 is configured to absorb ultraviolet light emitted from the ultraviolet light source 602. In another embodiment, the light directing element 612 is configured to reflect ultraviolet light emitted from the ultraviolet light source 602 back toward the target 604 to clean or re-clean various surfaces of the target 604. The light directing element 612 can be made of various materials, as described above, depending on whether it is used as an absorber or a reflector. The configuration shown in FIG. 6B may be used, for example, to control the direction of ultraviolet light, such as for cleaning touchscreens. In this case, the contact element 610 may include a touch screen located in an aircraft passenger cabin or cockpit, or other vehicle, or may be used in a gaming system or kiosk, such as a kiosk in a retail store or a kiosk associated with a financial institution. The second cleaning system 600B may be used for continuous lighting applications, as described in other embodiments herein.

[0096] FIG. 6C is a side view of a third cleaning system 600C including an ultraviolet light source 602, a reflector 622, and a target 620. The target 620 is shown here as having a rectangular cross-sectional shape, such that a first face 620A is parallel to and opposite a second face 620B, and a third face 620C is parallel to and opposite a fourth face 620D. The third face 620C and the fourth face 620D are perpendicular to the first face 620A and the second face 620B, respectively, in FIG. 6C. In other embodiments, the target may have a different cross-sectional shape, such as another polygon, triangle, circle, semicircle, crescent, or other shape or combination of shapes. The target 620 is removably coupled to the contact element 610 via the second face 620B of the target 620. Contact element 610 may be any of the contact elements described herein, such as, for example, a handle, a lever, a button, a touch screen, a counter, or any other type or combination of types of contact element.

[0097] Unlike other embodiments described herein, the reflector 622 is disposed around two or more outer surfaces (e.g., 620C, 620D) to direct the ultraviolet light emitted by the ultraviolet light source 602 toward the first surface 620A of the target 620 and confine the emitted ultraviolet light. In other embodiments, the reflector 622 can be disposed around the outer periphery of the target 620. The reflector 622 can be removably or permanently coupled to the target 620 by adhesive, mechanical coupling, magnetic coupling, press-fit coupling, or a combination thereof. The upper edge 622A of the reflector 622 is substantially flush with the first surface 620A of the target. The third cleaning system 600C can be configured such that the upper edge 622A of the reflector 622 is flush with the first surface 620A of the target 620, and both the upper edge 622A of the reflector 622 and the first surface 620A of the target 620 are flush with a surface 626 of the installation environment. As mentioned above, the installation environment may be, for example, an aircraft, plane, train, ship, automobile, retail store, restaurant, or other environment having a tabletop, seatback, kiosk, wall, or other surface 626.

[0098] The thickness of target 604, measured perpendicular to first surface 604A, can be from about 1 cm to about 20 cm. In another example, the thickness of target 620, measured perpendicular to first surface 620A, can be from about 5 cm to about 15 cm. In yet another example, the thickness of target 620, measured perpendicular to first surface 620A, can be from about 10 mm to about 20 cm.

[0099] The configuration of the third cleaning system 600C shown in Figure 6C can be used, for example, for intermittent UV cleaning rather than continuous illumination. The thickness of the target 620 is greater than that of the targets shown in the other embodiments, and this, combined with the absence of an absorber, allows more UV light to be reflected upward through the target toward the first surface 620A, as indicated by the arrows. A portion 624 of the target 620 is shown in Figure 6C, and this portion will be used in the following description of Figures 7A to 7E. <Example of texture processing used for directing ultraviolet light>

[0100] 7A-7E illustrate examples of textured targets according to embodiments of the present disclosure. FIGS. 7A-7E illustrate portion 624 of FIG. 6C and illustrate various texturing options (shown as 702, 706, 710, and 714, respectively, in FIGS. 7A-7E) for second surface 620B of target 620 when the second surface 620B is not a smooth surface. In some embodiments, the textured surfaces described herein extend across, for example, the entire second surface 620B. In other embodiments, the textured surfaces described herein extend across, for example, less than the entire second surface 620B.

[0101] 7A illustrates a first portion 624A having a target 620 including a first surface 620A opposite a first textured surface 702. The first textured surface 702 includes a plurality of triangular shapes having a first angle α, a second angle β, and a height 704. In one example, the height 704 is from about 1 micron (μm) to about 0.1 millimeters (mm) (100 μm). In another example, the height 704 is from about 20 μm to about 80 μm. In another example, the height 704 is from about 30 μm to about 90 μm. In one example, which may be combined with other examples herein, the first angle α is from about 30 degrees (°) to about 120°. In another example, which may be combined with other examples herein, the first angle α is from about 45° to about 100°. In one example, which may be combined with other examples herein, the first angle α is from about 75° to about 90°. In one example, which may be combined with other examples herein, the second angle β is between about 20 degrees (°) and about 85°. In another example, which may be combined with other examples herein, the second angle β is between about 25° and about 60°. In one example, which may be combined with other examples herein, the second angle β is between about 30° and about 45°. While the triangular irregularities of the first textured surface 702 are shown in FIG. 7A as each having the same height 704, in other embodiments, the irregularities may be formed at different heights from one another, in regular or random arrangements, as described below in at least FIG. 7B.

[0102] FIG. 7B illustrates a second portion 624B having a target including a first surface 620A opposite a second textured surface 720. The second textured surface 720 includes a plurality of triangular features having a first angle γ and a second angle β. Unlike the first textured surface 702 illustrated in FIG. 7A, the second textured surface 720 includes a plurality of triangular features of different heights. In one example, the first height 722A of the first triangular singularity 722 is from about 1 micron (μm) to about 0.1 millimeters (mm) (100 μm). In another example, the first height 722A is from about 20 μm to about 80 μm. In another example, the first height 722A is from about 30 μm to about 90 μm. Each triangular singularity has a lower height than the adjacent triangular singularity. For example, the second height 724A of the second triangular singularity 724 is lower than the first height 722A. The third height 726A of the third triangular unique portion 726 is less than the second height 724A. The fourth height 728A of the fourth triangular unique portion 728 is less than the third height 726A. In one example, the height of each triangular unique portion is, for example, about 10% to 70% less than its adjacent height. In another example, the height of each triangular unique portion is, for example, about 15% to 50% less than its adjacent height. In yet another example, the height of each triangular unique portion is, for example, about 20% to 40% less than its adjacent height. Depending on the embodiment, each triangular unique portion of the second textured surface 720 can be configured to decrease (or increase) in height by the same or different amounts (%) compared to its adjacent triangular unique portion. In one example, the ultraviolet light 730 is incident from a first direction, for example, along the x-axis. In other embodiments, the UV light 730 can be incident along other directions shown in the inset coordinate system, such as opposite or perpendicular to the direction shown by the UV light 730. If the UV light 730 is incident from a direction opposite to that shown in Figure 7B, the second textured surface 720 may include a series of triangular singularities that increase in height from 722 to 728, rather than gradually decreasing in height as in the example of Figure 7B.

[0103] In one example that may be combined with other examples herein, the first angle γ is between about 30 degrees (°) and about 120°. In another example that may be combined with other examples herein, the first angle γ is between about 45° and about 100°. In one example that may be combined with other examples herein, the first angle γ is between about 75° and about 90°. In one example that may be combined with other examples herein, the second angle δ is between about 20 degrees (°) and about 85°. In another example that may be combined with other examples herein, the second angle δ is between about 25° and about 60°. In one example that may be combined with other examples herein, the second angle δ is between about 30° and about 45°.

[0104] 7C illustrates a third portion 624C having a target 620 including a first surface 620A opposite a third textured surface 706. Unlike the first portion 624A, the third textured surface 706 is formed of a plurality of polygonal structures having a height 708. In one example, the height 708 is from about 1 micron (μm) to about 0.1 millimeters (mm) (100 μm). In another example, the height 708 is from about 20 μm to about 80 μm. In another example, the height 708 is from about 30 μm to about 90 μm.

[0105] 7D illustrates a fourth portion 624D having a target 620 including a first surface 620A opposite a fourth textured surface 710. The fourth textured surface 710, unlike the third textured surface 706, includes a plurality of polygonal structures having either a first height 708 or a second height 712, where the second height 712 is less than the first height 708. In one example, the second height 712 is about 10% to about 25% less than the first height 708. In another example, the second height 712 is about 26% to about 50% less than the first height 708. In yet another example, which may be combined with other examples herein, the second height 712 is about 51% to about 75% less than the first height 708. Although FIG. 7C shows singularities alternating between first heights 708 and second heights 712, in other examples, the singularities can be arranged in various height configurations other than the alternating spacing arrangement as shown.

[0106] FIG. 7E illustrates a fifth portion 624E of a target 620 including a first surface 620A opposite a fifth textured surface 714. Unlike the other textured surfaces described above, the fifth textured surface 714 includes a series of irregularities, each having a smooth surface. The irregularities of the fifth textured surface 714 have a height 716 and each have a width 718. In one example, the height 716 is from about 1 micron (μm) to about 0.1 millimeters (mm) (100 μm). In another example, the height 716 is from about 20 μm to about 80 μm. In another example, the height 716 is from about 30 μm to about 90 μm. In one example, the width 718 is from about 1 micron (μm) to about 0.1 millimeters (mm) (100 μm). In another example, the width 718 is from about 20 μm to about 80 μm. In another example, the width 718 is from about 30 μm to about 90 μm. In one example, the height to width ratio (716:718) is from about 4:1 to about 1:4. In another example, the height to width ratio (716:718) is from about 3:1 to about 1:3. In yet another example, the height to width ratio (716:718) is from about 2:1 to about 1:2.

[0107] While the distinctive features of the fifth textured surface 714 are shown in FIG. 7E as each having the same height 716, in other examples, the distinctive features can be formed at different heights and in a regular or random arrangement. In still other examples, the distinctive features of the fifth textured surface 714 can be separated from one another by valleys, e.g., flat, sloped, or rounded, shapes. The distinctive features shown in FIGS. 7A-7E can be used in combination in some embodiments. Additionally, in some embodiments, the texture can be used to form indicia, such as graphics or text indicating that the target has been UV cleaned or branded, as described herein. Furthermore, while the textured surfaces shown in FIGS. 7A-7E are described as being used on targets, these textured surfaces can also be provided on UV light sources or reflectors associated with the target to direct UV light to clean various surfaces of the target. As discussed with respect to Figure 7B, ultraviolet light can be incident on the target (620) shown in Figures 7A and 7C-7E along the x-axis, y-axis, z-axis, or at an angle between these axes, depending on the configuration of the cleaning system in which the target (620) is incorporated.

[0108] In this manner, disinfecting a target using the cleaning systems and methods described herein allows a user of a contact element coupled to the target to directly touch the UV-cleaned target rather than the contact element. The target is configured to be repairable and replaceable, so that removal of the target for repair or replacement does not damage the contact element. Targets can be customized with reflectors, absorbers, or with various shapes, textures, colors, or indicia for many applications related to a variety of contact elements and installation environments. Additionally, a light-directing element can be incorporated into the cleaning systems described herein as part of the UV light source or can be located remotely relative to either or both the target and the UV light source. Depending on the location of the indicia and the user's visual capabilities, a user can see, and possibly touch, the target to confirm that it has been UV-cleaned, providing confidence in the cleanliness of at least some surfaces of the installation environment in which the cleaning system is located.

[0109] Various embodiments are described in this disclosure. However, the disclosure is not limited to the particular embodiments described. Rather, any combination of the above-described features or elements, whether related to different embodiments or not, is contemplated for practicing and implementing the teachings presented herein. Also, when an element of an embodiment is described in the form of "at least one of A and B," embodiments including only element A, only element B, and both element A and element B are contemplated. Furthermore, while some embodiments may be advantageous over other possible approaches or the prior art, whether or not a particular advantage is obtained by a given embodiment is not intended to limit the disclosure. Accordingly, the embodiments, features, aspects, and advantages disclosed herein are merely exemplary and should not be considered elements or limitations of the appended claims unless expressly recited in the appended claims. Similarly, references to the "invention" should not be construed as a generalization of the inventive subject matter disclosed herein, and should not be considered elements or limitations of the appended claims unless expressly recited in the appended claims.

[0110] As will be appreciated by those skilled in the art, aspects described herein may be embodied as a system, method, or computer program product. As such, these aspects may take the form of entirely hardware aspects, entirely software aspects (including, for example, firmware, resident software, microcode, etc.), or aspects combining software and hardware, all of which may be referred to generally herein as "circuits," "modules," or "systems." Furthermore, aspects described herein may take the form of a computer program product embodied as one or more computer-readable storage medium(s) having computer-readable program code embodied thereon.

[0111] The program code embodied in the computer readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, fiber optic, radio frequency (RF), or any suitable combination thereof.

[0112] Computer-readable program code for carrying out the processes of aspects of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and the like, and conventional procedural programming languages ​​such as the "C" programming language or similar. The program code may run entirely on the user's computer, partially on the user's computer as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer via any type of network, such as a local area network (LAN) or wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet Service Provider).

[0113] Aspects of the present disclosure are described herein with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to aspects of the present disclosure. Each block of these flowcharts and / or block diagrams, and combinations of blocks in these flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be supplied to a processor of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus to configure a machine, such that the instructions, executed by the processor of the computer or other programmable data processing apparatus, create means for performing the functions / acts described in the flowchart and / or block diagram blocks.

[0114] These computer program instructions may also be stored on a computer-readable medium that can instruct a computer, other programmable data processing apparatus, or other device to function in a particular manner, such that the instructions stored on the computer-readable medium create an article of manufacture including instructions that implement the functions / acts described in the flowchart and / or block diagram blocks.

[0115] Furthermore, computer-readable program instructions can be loaded into a computer, other programmable data processing device, or other device to cause the computer, other programmable data processing device, or other device to perform a series of operational steps to realize a computer-implemented process, and the instructions executed on the computer, other programmable data processing device, or other device provide a process for implementing the functions / operations described in the blocks of the flowcharts and / or block diagrams.

[0116] The flowcharts and block diagrams in the accompanying drawings illustrate the structure, functionality, and operation of possible implementations of systems, methods, and computer program products according to various aspects of the present disclosure. In this regard, each block in the flowcharts or block diagrams may represent a module, segment, or portion of code, which is one or more executable instructions for performing a particular logical function. It should be noted that in some alternative implementations, the functions shown in the blocks may be performed in an order different from that shown in the figures. For example, two blocks shown as successive may in fact be executed substantially concurrently, or the blocks may be executed in the reverse or different order, depending on the functionality involved. Furthermore, each block in the block diagrams and / or flowcharts, or combinations of blocks in the block diagrams and / or flowcharts, may be realized by a special-purpose hardware-based system that performs the specified functions or operations, or by a combination of special-purpose hardware and computer instructions.

[0117] Furthermore, the present disclosure includes embodiments according to the following notes:

[0118] Appendix 1. A target (104) having at least 30% transparency to ultraviolet light in the wavelength range of about 222 nanometers (nm) to about 300 nm; a contact element (112) removably coupled to the target (104) and configured to undergo movement in response to a force being applied to the target (104).

[0119] Clause 2. The cleaning system of clause 1, wherein the target (104) is at least about 30% transparent to ultraviolet light.

[0120] Clause 3. The cleaning system of clause 1 or 2, wherein the target (104) has a transmittance of about 50% to about 75% to the ultraviolet light.

[0121] Appendix 4. The cleaning system of any one of Appendixes 1 to 3, wherein the target (104) comprises a transparent material having an ultraviolet transmittance of about 95% to about 99.15%.

[0122] Clause 5. The cleaning system of Clause 4, wherein the transparent material comprises borosilicate glass.

[0123] Appendix 6. The cleaning system of any one of Appendixes 1 to 5, wherein the target (104) has a thickness of about 0.2 millimeters (mm) to about 20 centimeters (cm).

[0124] Appendix 7. The cleaning system of any one of Appendixes 1 to 6, wherein the target (104) is directly coupled to the contact element (112) by adhesive, mechanical coupling, magnetic coupling, press-fit coupling, or a combination thereof.

[0125] Appendix 8. The cleaning system of any one of appendices 1 to 7, wherein the target (104) is indirectly coupled to the contact element (112) via a fixture (106).

[0126] Appendix 9. The cleaning system of any one of appendices 1 to 8, further comprising a component (106) that directly contacts and is removably connected to each of the contact element (112) and the target (104).

[0127] Clause 10. The cleaning system of any of clauses 1-9, further comprising an ultraviolet (UV) light source (102) configured to emit ultraviolet light in a wavelength range of about 222 nm to about 254 nm.

[0128] Clause 11. The cleaning system of clause 9, further comprising a first reflector (616) configured to reflect the ultraviolet light onto at least one surface of the target (104).

[0129] Appendix 12. The cleaning system of Appendix 11, wherein the first reflector (616) is formed from a fluoropolymer.

[0130] Appendix 13. The cleaning system of Appendix 11, wherein the first reflector (616) is formed from a material containing a plurality of pores, each pore having a maximum diameter of less than 222 nm.

[0131] Appendix 14. The cleaning system of Appendix 9, wherein the target (104) includes at least one target absorber (420) configured to absorb ultraviolet light after the ultraviolet light passes through at least one surface of the target (104).

[0132] Appendix 15. The cleaning system of Appendix 10, wherein the target (104) includes a second reflector (612) configured to reflect the ultraviolet light received from the ultraviolet light source (102) in at least one direction through the target (104) and direct the ultraviolet light toward at least one other surface of the target (104).

[0133] Clause 16: An ultraviolet (UV) light source (102) configured to emit ultraviolet light in a wavelength range of about 222 nm to about 300 nm; a target (104) having at least 30% transparency to ultraviolet radiation in the wavelength range of about 222 nanometers (nm) to about 300 nm; a contact element (112) removably coupled to the target (104) and configured to undergo movement in response to a force being applied to the target (104).

[0134] Clause 17. The cleaning system of clause 16, wherein the target (104) comprises a transparent material having a transmittance of about 95% to about 99.15%.

[0135] Clause 18. The cleaning system of clause 17, wherein the transparent material comprises borosilicate glass.

[0136] Appendix 19. The cleaning system of any of Appendixes 16-18, further comprising a non-transitory medium (108) executable by a processor and configured to store a plurality of logics including at least one cleaning program.

[0137] Appendix 20. A cleaning system described in any of Appendixes 16 to 19, further comprising a sensor (110) configured to detect a triggering event, and wherein the at least one cleaning program is configured to emit the ultraviolet light in response to the sensor (110) detecting the triggering event.

[0138] Clause 21. The cleaning system of clause 20, wherein the sensor (110) is associated with the target (104).

[0139] Clause 22. The cleaning system of clause 20, wherein the sensor (110) is associated with the ultraviolet light source (102).

[0140] Clause 23. The cleaning system of clause 20, wherein the sensor (110) is of a type selected from a temperature sensor, a pressure sensor, a timer, and combinations thereof.

[0141] Clause 24. Detecting a first triggering event (202) by a sensor associated with an ultraviolet (UV) cleaning system; and executing (204), by a processor, a cleaning program for cleaning the target in response to detecting the first trigger event, wherein executing the cleaning program includes: activating an ultraviolet light source of the ultraviolet cleaning system for a predetermined period of time, the ultraviolet light source configured to emit ultraviolet light in a wavelength range of about 222 nm to about 300 nm to clean the target.

[0142] Clause 25. The method of clause 24, further comprising, after executing the cleaning program (204), activating (208) a contact element coupled to the target.

[0143] Addendum 26. The method of Addendum 24 or 25, further comprising storing (216) a first time associated with detecting the first triggering event and a second time associated with executing the cleaning program in a data store (114), the data store (114) wirelessly communicating with the ultraviolet cleaning system.

[0144] Addendum 27. The method of any of Addendums 24 to 26, wherein activating the ultraviolet light source includes causing the ultraviolet light source to emit ultraviolet light to clean at least one of the plurality of surfaces of the target.

[0145] Addendum 28. The method of any one of Addendums 24 to 27, further comprising reflecting the ultraviolet light received from the ultraviolet light source by a reflector coupled to the target to clean the target (206).

[0146] Clause 29. Configuring the ultraviolet light source to emit the ultraviolet light to clean a first surface of the plurality of surfaces of the target (206); 29. The method of claim 28, further comprising: configuring the reflector to reflect the ultraviolet light through a second surface of the plurality of surfaces to clean the second surface (206).

[0147] Addendum 30. The method of any of Addendums 24-29, wherein executing the cleaning program (204) further includes activating the ultraviolet light source for the predetermined period, the ultraviolet light source configured to emit a predetermined range of wavelengths to clean (206) a plurality of targets within a predetermined proximity from the ultraviolet light source.

[0148] Addendum 31. The method of any of Addendums 24-30, wherein the first trigger event includes a predetermined time associated with a schedule, activation of a contact element associated with a target, a predetermined time associated with a previous ultraviolet emission from the ultraviolet light source, or a combination thereof.

[0149] While aspects of the present disclosure have been described above, other and further aspects of the disclosure may be devised without departing from the basic scope thereof, the scope of the present disclosure being defined by the following claims.

Claims

1. a target having at least 30% transmittance to ultraviolet light in the wavelength range of about 222 nanometers (nm) to about 300 nm and having multiple surfaces; a contact element removably coupled to the target and configured to produce movement in response to application of a force to the target; a component in direct contact with and removably coupled to each of the contact element and the target; a cleaning system, wherein a portion of a first surface of the plurality of surfaces is provided with at least one target absorber configured to absorb ultraviolet light after the ultraviolet light passes through a second surface of the plurality of surfaces.

2. The cleaning system of claim 1 , wherein the target is at least about 40% transmissive to ultraviolet light.

3. 3. The cleaning system of claim 1, wherein the target comprises a transparent material having an ultraviolet transmittance of about 95% to about 99.15%.

4. The cleaning system of claim 3 , wherein the transparent material comprises borosilicate glass.

5. The cleaning system of any one of claims 1 to 4, wherein the target has a thickness of about 0.2 millimeters (mm) to about 20 centimeters (cm).

6. The cleaning system of any of claims 1 to 5, wherein the target is coupled to the contact element by adhesive, mechanical coupling, magnetic coupling, press-fit coupling, or a combination thereof.

7. The cleaning system of any preceding claim, wherein the target is indirectly coupled to the contact element via a fixture.

8. The cleaning system of any of claims 1 to 7, further comprising an ultraviolet (UV) light source configured to emit ultraviolet light in the wavelength range of about 222 nm to about 254 nm.

9. The cleaning system of claim 1 , further comprising a first reflector configured to reflect the ultraviolet light onto at least one surface of the target.

10. 9. The cleaning system of claim 8, wherein the target includes a second reflector configured to reflect the ultraviolet light received from the ultraviolet light source in at least one direction through the target and direct the ultraviolet light toward at least one other surface of the target.

11. an ultraviolet (UV) light source configured to emit ultraviolet light in a wavelength range of about 222 nm to about 300 nm; a target having at least 30% transmittance to ultraviolet light in the wavelength range of about 222 nanometers (nm) to about 300 nm and having multiple surfaces; a contact element removably coupled to the target and configured to produce movement in response to application of a force to the target; a component in direct contact with and removably coupled to each of the contact element and the target; a cleaning system, wherein a portion of a first surface of the plurality of surfaces is provided with at least one target absorber configured to absorb ultraviolet light after the ultraviolet light passes through a second surface of the plurality of surfaces.

12. 12. The cleaning system of claim 11, further comprising: a non-transitory medium executable by a processor and configured to store a plurality of logics including at least one cleaning program; and a sensor configured to detect a triggering event, wherein the at least one cleaning program is configured to emit the ultraviolet light in response to the sensor detecting the triggering event.

13. The cleaning system of claim 1, wherein the target includes a third surface of the plurality of surfaces, the third surface including a textured surface.

14. A cleaning system as described in claim 13, wherein the textured surface extends across the entire third surface.

15. A cleaning system as described in claim 1, wherein the first surface and the second surface are parallel or perpendicular to each other.

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