Abstract: An irradiation device which is suitable, in particular, in the field of medicine for photodynamic diagnosis or therapy, comprises a plurality of flat luminous segments (1-4) which respectively generate radiation directed towards a particular irradiation surface (A). The individual luminous segments (1-4) are arranged at an angle to one another so that, when the irradiation device is arranged at a particular distance (D) from the irradiation surface (A), the directed radiations of the luminous segments (1-4) overlap essentially fully on this irradiation surface (A). In this way, homogeneous irradiation of the irradiation surface (A) with a high irradiation intensity will be achieved even in the event that each individual luminous segment (1-4) only has a relatively low irradiation intensity.

Abstract: A portable iontophoresis cold-contact electrode system having an outwardly raised, arched, electrically conducting electrode surface area (13) that can be cooled by a built-in sensor-regulated cooling element (30) in a defined way for the simultaneous cooling of the epidermis and the iontophoretic introduction of medicinal and cosmetic active substances through the epidermis into the underlying body tissue. In this process, the cooling of the epidermis makes possible an abrasion of horny skin cells on the skin surface, and also a conditioning and a better conductivity of the skin in order to funnel medicinal or cosmetic iontophoretic active substances more rapidly and more reliably through the human skin membrane into the underlying body tissue. The same electrode surface area can, if necessary, also be used to heat the skin by switching at the iontophoresis control unit if the individual conditions of the skin to be treated require it.