Turun Yliopisto

Isabella Norrbo

Mika Lastusaari

Pekka Laukkanen

A lighting device for adjusting the color temperature of white light emitted by a luminescent material is disclosed. The lighting device comprises: a luminescent material configured to emit white light when being exposed to electromagnetic radiation of a preselected wavelength range; at least one excitation unit configured to expose the luminescent material to electromagnetic radiation of a first wavelength range selected from the range of 230-330 nm; at least one excitation unit configured to expose the luminescent material to electromagnetic radiation of a second wavelength range, different from the first wavelength range, selected from the range of 300-600 nm; a metering unit configured to adjust the ratio of the irradiances of electromagnetic radiation of first wavelength range and of electromagnetic radiation of second wavelength range that is exposed on the luminescent material.

Lighting device

A detecting device for indicating the intensity of a predetermined type of radiation present in electromagnetic radiation incident on the detecting device can include:

Indicating the intensity of a predetermined type of radiation

The application relates to determining the amount of a predetermined type of radiation irradiated on a sensor material by: a) providing a sensor material; b) exposing the sensor material to the predetermined type of radiation for retaining the predetermined type of radiation in the sensor material for a predetermined period of time; c) subjecting the sensor material, which has been exposed to the predetermined type of radiation, to heat treatment and/or to optical stimulation; and d) determining the amount of visible light emitted by the sensor material as a result of being subjected to the heat treatment and/or to the optical stimulation; wherein the sensor material is represented by the following formula (I).

Determining the amount of a predetermined type of radiation irradiated on a sensor material

The invention relates to a material represented by the following formula (I)(M')(M&#x2033;M&#x2032;&#x2033;)O(X,X&#x2032;):M&#x2033;&#x2033;&#x2003;&#x2003; formula (I).Further, the invention relates to a luminescent material, and to different medical imaging and diagnostic methods of using the material. Also disclosed is a method of securely identifying an item using the material.

Luminescent material

A material represented by the following formula (I)(M')M&#x2033;M&#x2033;&#x2032;O(X,S):M&#x2033;&#x2033;&#x2003;&#x2003;formula (I).Also disclosed is an ultraviolet radiation sensing material, an X-radiation sensing material, a device and a method for determining the intensity of ultraviolet radiation.

Synthetic material for detecting ultraviolet radiation and/or X-radiation

The invention relates to a material represented by the following formula (I)(M')(M&#x2033;M&#x2032;&#x2033;)O(X,X&#x2032;):M&#x2033;&#x2033;&#x2003;&#x2003;formula (I). Further, the invention relates to a luminescent material, to different uses, and to a device.

The invention relates to a material represented by the following formula (I)(M')M&#x2033;M&#x2032;&#x2033;O(X,S):M&#x2033;&#x2033;&#x2003;&#x2003;formula (I).Further, the invention relates to an ultraviolet radiation sensing material, to an X-radiation sensing material, to different uses, to a device and to a method for determining the intensity of ultraviolet radiation.

Growing community of inventors

Turku, Finland

Isabella Norrbo