Methods of accurately estimating erythemaly-weighted UV exposure, such as the UV Index, and sensors adapted for the same.

Methods of accurately estimating erythemaly-weighted UV exposure, such as the UV Index, and sensors adapted for the same.

The invention relates to a method for determining the thickness of a contaminating layer and/or the type of a contaminating material on a surface (7) in an optical system, in particular on a surface (7) in an EUV lithography system, comprising: irradiating the surface (7) on which plasmonic nanoparticles (8a,b) are formed with measurement radiation (10), detecting the measurement radiation (10a) scattered at the plasmonic nanoparticles (8a,b), and determining the thickness of the contaminating layer and/or the type of the contaminating material on the basis of the detected measurement radiation (10a). The invention also relates to an optical element (1) for reflecting EUV radiation (4), and to an EUV lithography system.

There is a sunscreen detection device for detecting a sunscreen product, the sunscreen detection device comprising: a substrate; a first light, disposed on the substrate and controllably coupled to a processor, controllable by the processor to emit light at a first light wavelength at the subject's skin when the sunscreen detection device is oriented to emit light on the subject's skin; a first light sensor circuit, disposed on the substrate and communicatively coupled to the processor, capable of sensing a percentage absorption of light by the subject's skin at the first light wavelength (% AbsAtWL1) and communicating the % AbsAtWL1 to the processor; a processor, configured to: cause the first light to emit light when the sunscreen detection device is oriented to emit light on the subject's skin; record the % AbsAtWL1 from the first light sensor; and assess a level of sunscreen protection based at least on the % AbsAtWL1.

A Thomson scattering measurement system according to the present disclosure includes: a transfer optical system provided on an optical path of a slit light beam group generated by division through a slit array and configured to transfer the slit light beam group to a plurality of transfer image groups separated from each other; and a second slit provided on an optical path of light from the transfer image groups and configured to selectively allow light from a plurality of transfer images positioned on a straight line extending in a direction corresponding to a first direction to pass through the second slit, the transfer images corresponding to slit light beams at positions different from each other in a second direction in the slit light beam group among transfer images included in the transfer image groups.

A method of monitoring ultraviolet radiation reflectance is provided for activating an ultraviolet radiation reflectance digital sensor and display monitor; capturing ultraviolet radiation reflectance passing through a lens onto the digital sensor; analyzing ultraviolet radiation reflectance against a preloaded and predetermined color palate; generating a video image; and outputting the video image to the display monitor. A device is also provided for an ultraviolet radiation reflectance monitoring application which receives data from an ultraviolet radiation sensitive digital imaging plate installed on the device; wherein the application processes data received from the digital imaging plate and generates an output image of ultraviolet radiation reflectance to a video monitor communicatively connected to the device.

An electronic device for determining an ultraviolet (UV) dose includes a memory, at least one non-UV sensor, a display, and a processor, coupled to the memory, the at least one non-UV sensor, and the display. The processor is configured to determine a context of the electronic device, obtain information of ambient light using one or more parameter sensed by the light sensor, estimate an ultraviolet (UV) dose based on the context of the electronic device and the information of ambient light, and control the display to output information of the UV dose.

Eyewear having monitoring capability, such as for radiation or motion, is disclosed. Radiation, such as ultraviolet (UV) radiation, infrared (IR) radiation or light, can be measured by a detector. The measured radiation can then be used in providing radiation-related information to a user of the eyewear. Motion can be measure by a detector, and the measured motion can be used to determine whether the eyewear is being worn.

This disclosure is directed to devices, systems, and methods for skin damage protection and detection, including providing images and recommendations and images to users to assist them with proper application of an applied-to-skin sunscreen. Disclosed devices include personal user devices that are operable to emit ultraviolet light and to measure the degree of ultraviolet light reflected from skin, upon which images can be presented on a device screen to give visual indications of sunscreen coverage and/or skin aging. Measured ultraviolet images and visible light images can further be presented to device users in an overlay, side-by-side, or other fashion, to further assist in detection of sunscreen coverage and/or degrees of skin damage. Further, the user of the device may be able to view real-time video in the same ultraviolet/visible light overlay fashion, and assess the state of photo-protective effects of an applied-to-skin sunscreen.

This disclosure is directed to devices, systems, and methods for skin damage protection and detection, including providing images and recommendations and images to users to assist them with proper application of an applied-to-skin sunscreen. Disclosed devices include personal user devices that are operable to emit ultraviolet light and to measure the degree of ultraviolet light reflected from skin, upon which images can be presented on a device screen to give visual indications of sunscreen coverage and/or skin aging. Measured ultraviolet images and visible light images can further be presented to device users in an overlay, side-by-side, or other fashion, to further assist in detection of sunscreen coverage and/or degrees of skin damage. Further, the user of the device may be able to view real-time video in the same ultraviolet/visible light overlay fashion, and assess the state of photo-protective effects of an applied-to-skin sunscreen. The disclosed devices, systems, and methods allow for a number of additional functionalities including, but not limited to, the ability to use images or videos to monitor the progression of skin damage from ultraviolet radiation, retention of historical records of the damage through an associated user profile, access to image analytic tools which may quantify the degree of skin damage, and access to contextualized suggestions or recommendations for sunscreen and sunscreen application based on location, time of day, geographic data, weather data, historical data, or other extrinsic information.