Systems and methods for accurate measurement and real-time feedback of solar ultraviolet exposure for management of ultraviolet dose. The systems can include a wearable device including a proximity sensor, the proximity sensor used to initiate an alert that the proximity sensor is covered. The systems can include a visible light sensor, the visible light sensor used to enter into a sleep, or night, mode.

An electronic device including a processor configured to receive a first radiation measurement and determine a skin surface condition information based on the first radiation measurement.

A process for improving sensitivity of a film base, coated with a dispersion of a normally crystalline polyacetylenic compound in a non-solvating liquid which is dried on the film surface, to particular photon energy band, specifically, long wavelength UV; the polyacetylenic compound preferably having at least two conjugated acetylenic linkages and containing from 12 to 60 carbon atoms. The sensitization of the film to long wavelength UV is achieved via the addition of photoinitiator(s) capable of absorbing UV energy and converting it to free radicals. The process comprises dispersing the normally crystalline polyacetylenic compound in the non-solvating liquid to a concentration of from about 2 to about 50% polyacetylene crystalline solids and a photoinitiator or combination of photoinitiators to a concentration of from 0.01 to 10%. The resultant dispersion is then coated and dried on a substrate. Additionally, applications using this film as a UVA illumination indicator and dosimeter are disclosed as well.

A device for processing items, in particular items in a production sequence, in different processing steps, has at least one sensor arrangement having a plurality of sensors, wherein at least one item is measured in a detection mode by at least a partial quantity of the sensors as the detection means, wherein an impacting of the at least one item with an irradiation means is determined by a control means while considering a result of the measuring procedure of the at least one item; and wherein the at least one item is irradiated in an irradiation mode by at least a further partial quantity of the plurality of sensors as the irradiation means. If appropriate, at least part of the method is repeated with a renewed measuring, determination and/or irradiation.

Methods and apparatus for processing an image of a beam generated by an optical system to extract information indicative of an extent of damage to optical elements in the optical system. Also disclosed is a beam image and analysis tool capable of acquiring an image of a beam at any one of a number of locations.

One variation of a method for measuring ambient ultraviolet light radiation including: calculating a target direct orientation of a light exposure device based on a location, a current date and time, and a direct solar position model; calculating a target diffuse orientation of the light exposure device based on the location, the current date and time, and a diffuse solar position model; in response to detecting alignment between orientation of the light exposure device and the target direct orientation, recording a direct ultraviolet value; in response to detecting alignment between orientation of the light exposure device and the target diffuse orientation, recording a diffuse ultraviolet value; in response to detecting alignment between orientation of the light exposure device and a target global orientation, recording a global ultraviolet value; and calculating an ultraviolet index based on the global ultraviolet value, the direct ultraviolet value, and the diffuse ultraviolet value.

A system for solar disinfection of fluid. One most preferred version of the system includes: (a) A UVTC, made of a polyethylene laminate film with an approximately rectangular plan, providing: a. A first compartment. b. A second compartment for holding fluid, with a port to fill and dispense. (b) A Disinfection Monitor Module (DMM) located in the first compartment which: a. Includes at least one sensor to measure radiation intensity. b. Provides at least one user interface: c. Contains a wireless communication interface. d. Operates according to a process that ensures sufficient cumulative exposure of the contained fluid to solar UV to achieve adequate solar disinfection. Alternative embodiments may also include sensors to detect additional characteristics, such as transmittance, turbidity, combined transmittance, and/or temperature.

The present invention concerns a method for the detection of sunlight with a detector arrangement that delivers an output signal as a function of incident sunlight. In the method a detector arrangement is deployed with an SiC-semiconductor detector, which is only sensitive to the UV-component of the incident sunlight. By the deployment of such a detector arrangement a disturbance of the sunlight detection by artificial light sources is to a large extent avoided, so that a more reliable detection of the sunlight is enabled.

A method of making an ultraviolet sensor includes applying a metal-containing solution to a substrate using a spin coating technique to form a metal-containing coat. The metal-containing coat is baked and pyrolyzed to form a metal-containing oxide film on the substrate. The metal-containing oxide film has a cubic crystalline structure suitable for ultraviolet photodetectors in flame detection applications.

Methods, devices, and systems for determining failure of an ultraviolet (UV) sensor are described herein. One device includes a memory, and a processor configured to execute executable instructions stored in the memory to reduce an excitation voltage of a UV sensor until no conduction occurs in the UV sensor, increase, upon no conduction occurring in the UV sensor, the excitation voltage of the UV sensor until a conduction event occurs, compare the excitation voltage at which the conduction event occurs to a reference voltage, and determine whether the UV sensor has failed based on the comparison.