A path detection system based on SBUV light signals is provided, including a SBUV light signal emitter, a SBUV detectors and a signal processing module, wherein the SBUV light signal emitter is arranged on a road to serve as a path mark line; the SBUV detector is configured to detect the path mark line and transmit the detected signals from the SBUV light signal emitter to the signal processing module; and the signal processing module acquires a traveling path in real time by using a path line extraction algorithm, and eventually outputs path information.

Method, product and blocking element of short wavelengths in LED-type light sources consisting of a substrate with a pigment distributed on its surface and, in that said pigment has an optical density such that it allows the selective absorption of short wavelengths between 380 nm and 500 nm in a range between 1 and 99%.

The present invention relates to an ornamental connector for connecting an ornamental item to and elongate flexible member such as a strap, belt or chain. The ornamental connector includes abase including an aperture a recess for receiving the elongate flexible member, as well as an engaging arrangement for removably connecting an ornamental item. The ornamental connector can further include a locking arrangement for locking the ornamental connector to the base. The ornamental connector can further include a holding arrangement for preventing sliding movement of the ornamental connector along the elongate flexible member.

A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

Provided are an ink composition, comprising greater than 0.2% by weight a graphene quantum dot nanosurfactant, a printable material, and a solvent, wherein the printable material is dispersed in the solvent by the graphene quantum dot nanosurfactant, and a method of preparing an ink composition. Advantageously, the present ink composition may be printed onto 2D and 3D substrates to form printed films with improved mechanical stability and photoconductance.

Provided is a semiconductor light detection device having a relatively high detection sensitivity to a light component of a specific wavelength. The semiconductor light detection device includes: a semiconductor light receiving element, in which a first conductive layer is formed on a surface of a semiconductor substrate, a second conductive layer is formed below the first conductive layer, a third conductive layer is formed below the second conductive layer, and a photocurrent based on the intensity of incident light is output from the third conductive layer while an input voltage is applied to the first conductive layer; and a semiconductor detection circuit configured to output an output voltage based on a current difference between a first photocurrent and a second photocurrent being output in response to the application of the first input voltage and the second input voltage, respectively.

A wearable apparatus for indicating a threshold amount of ultra-violet (UV) light has been received by a user and method of making the same are provided. In an embodiment, a wearable apparatus includes a first material and a second material. The second material includes a color changing material that changes color from a first color to a second color when exposed to a threshold level of UV light. The wearable apparatus is configured to be worn by a user in a place exposed to sunlight. The second color indicates that the user has been exposed to a threshold amount of UV light.

The computer system and computer-implemented method of generating and providing skin care product recommendations to a subject, wherein the method comprises determining, by a computing device, a UV-B exposure of the subject; determining, by the computing device, a vitamin D intake due to the UV-B exposure; determining, by the computing device, a target vitamin D of the subject; and providing, by the computing device, a skin care product recommendation to the subject when the vitamin D intake due to the UV-B exposure is less than the vitamin D target of the subject.

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.

The invention provides a system and related equipment for the precise measurement of the output characteristic of a light source, e.g., a dental light curing unit (LCU) or light for photodynamic therapy, using a light collector, a light detector, and a computer programmed to deliver the value of the output characteristic of the light source to the user. The systems allow for the determination of a proper 5 exposure time or the selection of a light source as needed for a specific application. The invention also provides a light device.