Abstract: An energy transmission unit having a radiation source that generates an energy beam to transmit energy from the transmission unit to an energy receiving unit. The receiving unit includes an energy converter receiving an energy beam and converting it into electrical energy. When the energy transmission and receiving units are spatially aligned relative to one another, information is captured via markers or reflectors of the energy receiving unit about the presence of objects, humans or animals, or the position of the eyes of humans or animals. Defined criteria are checked on the basis of the captured information, and a radiation source of the energy transmission unit is aligned to a detected position of the energy receiving unit and activated, such that an energy beam is generated by the radiation source and energy of the energy beam generated by the radiation source can be received by the energy receiving unit.

Abstract: An information recording medium comprising a substrate and superimposed thereon a recording layer composed of Sb, Te and Ge has been found to be advantageously employed, because of its high thermal stability as well as high sensitivity and high S/N ratio, in a system of recording information by exposing an energy beam to a recording medium to cause the exposed areas to be different in optical extinction coefficient from the non-exposed areas.