A meter for measuring UV light having wavelengths, preferably between 205 nm and 237 nm. The meter includes at least one UV sensitive photo diode adapted for detecting the wavelengths of UV light between a lower end and an upper end; a first filter that blocks the UV light having wavelengths below 237 nm down to at least the lower end that the UV sensitive photo diode can detect; a second filter that blocks the UV light having wavelengths above 230 nm up to at least 205 nm; at least one amplifier for amplifying a signal from the UV sensitive photo diode; an analog to digital converter; a microprocessor; a battery in electrical communication with the microprocessor. The microprocessor preferably being in communication with the amplifier and the analog to digital converter. The microprocessor provides a result for the UV light that the UV sensitive photo diode is exposed to.

Provided are an image analysis method, an image analysis device, a program, and a recording medium capable of accurately estimating an image signal value of an object color-developed by using a specific coloring material by using an image signal value of a color chip.

The embodiment of the present invention acquires a spectral characteristic of an object color-developed by using a specific coloring material, acquires a spectral characteristic of each of a plurality of color chips formed of coloring materials different from the specific coloring material, approximates the spectral characteristic of the object by using an approximation expression including the spectral characteristic of each of the plurality of color chips as variables, acquires an image signal value, which is obtained by imaging each of the plurality of color chips by an imaging device and which corresponds to color of a captured image, for each color chip, and estimates the image signal value, which is obtained in a case where the object is imaged by the imaging device, based on the acquired image signal value for each color chip and the approximation expression.

The present disclosure teaches a UV dosimeter comprising a UV-sensitive layer and a barrier that protects the UV-sensitive layer. The barrier is permeable to oxygen but impermeable to water and, thus, protects the UV-sensitive layer from water while allowing exposure of the UV-sensitive layer to oxygen. The UV-sensitive layer is accessible to both UV radiation and visible light. The UV-sensitive layer comprises a mixture of a semiconductor material, a UV-oxidizable dye, a sacrificial electron donor, and a matrix material. The semiconductor material has a band gap that corresponds to photon energy of the UV radiation. The dye has both an oxidation state and a reduction state. The oxidation state of the dye is visibly distinguishable from the reduction state of the dye. The sacrificial electron donor oxidizes when exposed to UV radiation. The matrix provides structural integrity to the mixture.

An ultraviolet-ray detecting device, a smart apparatus and a fabricating method. The ultraviolet-ray detecting device has: a substrate (1); and a plurality of identification regions (2), wherein each of the identification regions (2) includes an ultraviolet-photochromic marker (3) on the substrate (1) and a cover (4) covering the ultraviolet-photochromic marker (3), wherein ultraviolet-ray blocking capacities of the covers (4) in the identification regions (2) are different.

An ultraviolet-ray detecting device, a smart apparatus and a fabricating method. The ultraviolet-ray detecting device has: a substrate (1); and a plurality of identification regions (2), wherein each of the identification regions (2) includes an ultraviolet-photochromic marker (3) on the substrate (1) and a cover (4) covering the ultraviolet-photochromic marker (3), wherein ultraviolet-ray blocking capacities of the covers (4) in the identification regions (2) are different.

The invention relates to a photosensitive printing composition comprising a photocatalyst which exhibits a photocatalytic effect when exposed to UV and/or visible radiation, a colouring agent that exhibits a colour change in response to the photocatalytic effect, and a film forming agent. The composition has a viscosity suitable for printing. The invention further relates to a sun-exposure sensor comprising a photosensitive layer printed on a surface of a support, the photosensitive layer comprising a photocatalyst which exhibits a photocatalytic effect when exposed to UV and/or visible radiation, a colouring agent that exhibits a colour change in response to the photocatalytic effect, and a film forming agent.

The invention relates to a photosensitive printing composition comprising a photocatalyst which exhibits a photocatalytic effect when exposed to UV and/or visible radiation, a colouring agent that exhibits a colour change in response to the photocatalytic effect, and a film forming agent. The composition has a viscosity suitable for printing. The invention further relates to a sun-exposure sensor comprising a photosensitive layer printed on a surface of a support, the photosensitive layer comprising a photocatalyst which exhibits a photocatalytic effect when exposed to UV and/or visible radiation, a colouring agent that exhibits a colour change in response to the photocatalytic effect, and a film forming agent.

A detecting device for indicating the intensity of a predetermined type of radiation present in electromagnetic radiation incident on the detecting device can include: a filter element for filtering the incident electromagnetic radiation, wherein the filter element is configured to filter off electromagnetic radiation with a wavelength of above 590 nm from the incident electromagnetic radiation; a converging element configured to increase the density of photons of the predetermined type of radiation present in the incident electromagnetic radiation; and a sensor element of material arranged to receive the incident electromagnetic radiation that has passed through the filter element and the converging element for indicating the intensity of the predetermined type of radiation present in the incident electromagnetic radiation by change of the color of the sensor element of material, wherein the material is represented by the following formula: (M′)8(M″M′″)6O24(X,S)2:M″″ (formula (I)).

A detecting device for indicating the intensity of a predetermined type of radiation present in electromagnetic radiation incident on the detecting device can include: a filter element for filtering the incident electromagnetic radiation, wherein the filter element is configured to filter off electromagnetic radiation with a wavelength of above 590 nm from the incident electromagnetic radiation; a converging element configured to increase the density of photons of the predetermined type of radiation present in the incident electromagnetic radiation; and a sensor element of material arranged to receive the incident electromagnetic radiation that has passed through the filter element and the converging element for indicating the intensity of the predetermined type of radiation present in the incident electromagnetic radiation by change of the color of the sensor element of material, wherein the material is represented by the following formula: (M′)8(M″M′″)6O24(X,S)2:M″″ (formula (I)).

An apparatus 5 comprises a first layer 20 comprising a colourimetric indicator; and a second layer 30 provided on at least a portion 22 of the first layer 20, at least a portion of the second layer 30 being configured to block and/or absorb a radiation to which the indicator is sensitive or reactive and being configured to be substantially transparent to visible light.