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.

Systems, methods, and devices of the various embodiments may enable the detection and localization of power line corona discharges and/or electrical arcs by an unmanned aerial vehicle (UAV) including an ultraviolet (UV) sensor and a reflective parabolic dish. In various embodiments, the UV sensor may use the photoelectric effect to sense narrow-band UV photons in a Geiger-Mueller tube and circuit configuration. In various embodiments, the reflective parabolic dish may be fixed relative to the UV sensor and include a reflective concave surface. The reflective concave surface may be configured to reflect narrow-band UV photons toward the UV sensor.

Disclosed in one general aspect is a particle interaction characterization instrument that comprises a flow cell for a liquid sample that includes suspended particles and a light source positioned to illuminate the suspended particles in the liquid sample fluid in the sample vessel. A first scattering detector is positioned to receive light from the light source that has been scattered by the particles suspended in sample fluid in the sample vessel at at least one predetermined scattering angle. An ultraviolet transmittance detector is positioned to receive a portion of the light from the source that passes through the suspended particles without being absorbed or scattered. Interaction analysis logic is responsive to both the scattering detector and the ultraviolet detector, and is operative to derive at least one interaction property for the suspended particles.

Provided an ultraviolet-sensing sheet that facilitates measurement of ultraviolet irradiance over a wide area, that is suitable in ultraviolet irradiance in a range from 1 to 1,000 mJ/cm.sup.2, a method for manufacturing such an ultraviolet-sensing sheet, and a method for sensing ultraviolet. The ultraviolet-sensing sheet has a change in reflection density D1 of 0.2 or more over a range of cumulative illuminance 1 mJ/cm.sup.2 or more and less than 10 mJ/cm.sup.2, a change in reflection density D2 of 0.2 or more over a range of cumulative illuminance 10 mJ/cm.sup.2 or more and less than 100 mJ/cm.sup.2, and a change in reflection density D3 of 0.2 or more over a range of cumulative illuminance 100 mJ/cm.sup.2 or more and 1,000 mJ/cm.sup.2 or less, as measured at a wavelength of 365 nm when the ultraviolet-sensing sheet is irradiated with a high-pressure mercury lamp.

The Portable Ultra Violet C Sanitizer is a self-contained, portable, self-shut-off, preprogrammed/programmable UVC light irradiation microorganism inactivation device that more effectively, efficiently and safely sanitizes surfaces than comparable products presently on the market. Advantageously, the device provides a faster alternative for UVC sterilization of a surface, while protecting the operator from potentially dangerous exposure to the UVC radiation.

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 device for detecting exposure to light includes: a photo-responsive layer including a photochromic material; a skin-mimicking cover layer covering a first side of the photo-responsive layer; and an adhesive layer configured to couple a second side of the photo-responsive layer opposite the first side to a surface.

A wavelength measuring device configured to detect a wavelength of ultraviolet laser light outputted from a laser resonator with at least one etalon, the wavelength measuring device includes: a first housing having an interior space being sealed and accommodating the etalon, an input window through which the ultraviolet laser light enters to the first housing, the input window being provided at a first opening of the first housing, a first sealing member configured to seal a gap between a rim part of the input window and a circumferential portion of the first opening, a shielding film provided between the rim part of the input window and the first sealing member and configured to shield the first sealing member from the ultraviolet laser light coming from the input window, and a diffusing element provided outside of the first housing and configured to diffuse the ultraviolet laser light before being incident on the input window.

A computer executable method that can be stored in a memory, the method including: visually presenting on a display of a user device a history of UV dose that was calculated based on information sensed by a UV sensor in a wearable UV sensing device; visually presenting a percentile indicator on the display, the percentile indicator being indicative of a calculated percentile of the history of UV dose; and visually presenting on the display a user-adjustable UV dose threshold interface that is adapted to allow the user to interact with the user-adjustable UV dose interface and choose a user-chosen UV dose threshold quantity.

A beam delivery system may include: beam adjusters configured to adjust a divergence angle of a pulse laser beam; a beam sampler configured to separate a part of the pulse laser beam outputted from a first beam adjuster provided at the most downstream among the beam adjusters to acquire a sample beam; a beam monitor configured to receive the sample beam and output a monitored diameter; and a beam delivery controller configured to control the beam adjusters based on the monitored diameter. The beam delivery controller may adjust each of beam adjusters other than the first beam adjuster selected one after another from the most upstream so that the monitored diameter at the beam monitor becomes a predetermined value specific to the beam adjuster, and adjust the first beam adjuster so that the pulse laser beam becomes focused at a position downstream of a target position.