Abstract:
This invention relates to an irreversible indicator for detecting oxidising agents, or in particular an oxygen indicator, comprising at least one redox-sensitive dyestuff, at least one semiconductor material and at least one electron donor. This indicator is activated by exposure to light of about 200-400 nm. The invention also relates to UV light detector.
Abstract:
A service implementing method and apparatus according to an ultraviolet (UV) index in a mobile terminal provides diverse information and services according to the UV index detected by the mobile terminal having a UV sensor mounted thereon. The service implementing method and apparatus includes switching over to a UV alarm function mode when an alarm function is selected in a UV management mode, setting a predetermined time interval for informing a user of the UV index when an alarm interval is selected in the UV alarm function mode. The service implementing method and apparatus further includes setting a specified time for informing the user of the UV index when an alarm time is selected in the UV alarm function mode, and setting avatars or alarm sounds for informing the user of the UV index according to the set time when an alarm method is selected in the UV alarm function mode.
Abstract:
A spherical actinometer integrates the omnidirectional radiant flux over time to obtain the radiant energy or fluence incident on the sphere utilizing a small spherical vessel containing a solution that responds to germicidal radiation but not ambient room light. In one embodiment the actinometric solution, is an aqueous mixture of iodide and iodate that is optically opaque at 254 nm but insensitive radition above 330 nm. The UV-induced formation of triiodide, is facilitated by the presence of iodate that acts as an electron acceptor. The formation of triiodide, which is easily measured spectroscopically with a photometer, occurs with a quantum yield of 0.75 for 254 nm radiation at 21° C. The actinometeric measurement of UV fluence using the system is substantially independent of the size of the measuring device.
Abstract:
A light detecting device is fabricated to have the following structure: a light receiving element having a protective layer, in which a transparent conductive electrode, a semiconductor layer, an electrode and the protective layer are successively formed on a transparent substrate, is arranged on a first face of an insulating substrate having a terminal electrode formed to be exposed to first and second faces of the insulating substrate in such a manner that the protective layer is opposed to the first face of the insulating substrate; and further the transparent conductive electrode and the electrode are connected electrically to the terminal electrode exposed to the first face of the insulating substrate. The light detecting device having this structure is surface-mounted on a circuit board to connect the terminal electrode exposed to the second face of the insulating substrate to an external terminal of the circuit board.
Abstract:
A mobile UV-intensity indicator is mounted on a vehicle or a portable article. The UV-intensity indicator includes a UV detector and an indicator such as a display and/or an alarm, and warns of overexposure under UV radiation by marking in the display and/or sounding the alarm.
Abstract:
A compact device for quantifying and showing a time interval wherein an individual is exposed to lights in particular sunlight that cause the synthesis and production of vitamin D and its related precursors and derivatives adaptable to convert a quantity of absorbed sunlight to a quantity of electricity which is used to correlate, quantify and show the time interval required for the aforementioned synthesis and production by the body and skin subject to the same source, intensity and condition of light. The device also comprises various functions of tracking and showing various time intervals and junctures and maintaining and showing a flowsheet of time intervals and the acquisitions of vitamin D and its related precursors and derivatives.
Abstract:
A tubular holder for an actinometric monitoring element for monitoring the irradiance of ultraviolet light within a liquid to be treated for microorganism control. The holder extends into the interior of a vessel or a pipeline that carries a fluid to be treated by exposure to ultraviolet light. A transparent end cap is carried at the end of the holder that is within the vessel or pipeline. Positioned within the holder is an actinometric monitoring element that can be either a transparent container for an actinometric solution or a photocell, each for sensing the irradiance of ultraviolet light emitted by light sources positioned within the vessel or pipeline. The holder is removably received in a sleeve that extends through the wall of the vessel or pipeline.
Abstract:
An apparatus and process for measuring light intensities includes the use of a probe. The probe is configured for monitoring a wavelength range from about 180 nanometers to about 270 nanometers (nm). The probe comprises a reflective and diffusive layer adapted for collecting light; a waveguide having one end in optical communication with the reflective and diffusive layer, wherein the waveguide has greater than about 50 percent transmission at wavelengths of about 180 nm to about 270 nm; a sensor probe in optical communication with the other end of the waveguide; and a filter intermediate to the waveguide and the sensor, wherein the filter is adapted to remove wavelengths greater than about 270 nm and has a percent transmission at wavelengths of about 180 nm to about 270 nm greater than about 50 percent.
Abstract:
Extreme ultraviolet light is detected using a universal in-band detector for detecting extreme ultraviolet radiation that includes: (a) an EUV sensitive photodiode having a diode active area that generates a current responsive to EUV radiation; (b) one or more mirrors that reflects EUV radiation having a defined wavelength(s) to the diode active area; and (c) a mask defining a pinhole that is positioned above the diode active area, wherein EUV radiation passing through the pinhole is restricted substantially to illuminating the diode active area.
Abstract:
The present invention is a portable UV detector with simple operation, wherein a printed circuit board, a display module and multiple batteries are housed in the cylindrical body. A display panel window is located on the external wall of the cylindrical body to mount the display module with an appropriate UV level indicator. The light detector located underneath the filtering lens is enabled at the push of a button to measure the intensity of incoming light, whenever a user wants to find out the intensity of UV radiation in an outdoor environment. Light of different intensity exhibits different electrical characteristics in terms of current flow, voltage or resistance. Therefore, through the light detector a value is measured and converted to an appropriate reading scale corresponding to the UV radiation level measured which is then shown on the display of the UV detector.