The invention relates to an irradiation module for use in a device for irradiation with medical and cosmetic radiation, comprising a plurality of LEDs arranged on a carrier. The invention also relates to a device for irradiating a user with medical and cosmetic radiation, comprising a plurality of irradiation modules for irradiation with medical and cosmetic radiation, which modules are accommodated in a housing part. The invention further relates to a method for irradiating a user with medical and cosmetic radiation, comprising a plurality of irradiation modules for irradiation with medical and cosmetic radiation, which modules are selected from the group comprising fluorescent tubes, LEDs, organic LEDs, and high-pressure lamps. In order to provide improved irradiation results, a first group of first LEDs, which emits radiation within the UVA spectrum, and a second group of second LEDs, which emits radiation within the UVB spectrum, are arranged on the carrier.

A phototherapeutic system in accordance with an embodiment of the present technology includes a housing at least partially defining an irradiation zone configured to accommodate at least a portion of a human subject. The system further comprises an ultraviolet (UV) radiation source configured to direct UV radiation along a radiation path extending from the radiation source to the irradiation zone. The radiation source includes a concentrated source at which UV radiation is generated, and a collimating reflector (or lens) configured to reflect (or refract) the UV radiation and thereby increase collimation of the UV radiation. The system still further comprises a filter, a spreader, and a collimator disposed successively farther downstream from the radiation source along the radiation path. The spreader and the collimator respectively decrease and increase collimation of the UV radiation before the UV radiation reaches the subject.

The present invention relates to a radiation-emitting device (100), comprising at least one radiation source (110) configured to emit radiation of at least one wavelength towards a target (190) or towards a subject (192); at least one space or surface (140) configured to place the target (190) or the subject (192) therein or thereon; at least one means (185) configured to control the at last one radiation source's radiation emission towards the target (190) or towards the subject (192); wherein the radiation-emitting device (100) further comprises: at least one dual heating or cooling system (170) configured to heat or to cool the at least one space or surface (140) and comprising a Peltier device (171), said Peltier device (171) comprising at least two cuboids (172, 172) made of two semiconductor materials having different electron densities, said at least two cuboids (172, 172) being placed thermally in parallel to each other and electrically in series, interconnected with thermally conducting metal bridging plates (173, 173) and sandwiched between a non-conducting material reduced temperature cover plate (174) and a non-conducting material elevated temperature cover plate (174) and configured to be supplied with DC electric current via electrical connections (179); at least one first heat exchanger (175) thermally connected as a heat source to the Peltier device's (171) reduced temperature cover plate (174); at least one second heat exchanger (176) thermally connected as a heat sink to the Peltier device's (171) elevated temperature cover plate (174); at least one fan or fan assembly (177, 178) configured to cause environmental air to flow along the at least one heat exchanger (175, 176); at least one nozzle (180) configured to pass and direct the environmental air flow having passed the at least one first and/or second heat exchanger (175, 176) and heated or cooled towards the at least one space or surface (140) configured to place the target (190) or the subject (192) therein or thereon; and at least one means (181) configured to control the DC electric current supply to the Peltier device (171). The invention also relates to a dual heating or cooling system, to the use of the dual heating or cooling system in a radiation-emitting device and a method of alternatingly heating or cooling areas or parts of a radiation-emitting device (100) before, during or after a radiation-emitting operation of sai