CONCENTRATORE SOLARE E PROCEDIMENTO PER LA SUA REALIZZAZIONE

The invention relates to heliotechnology. A sunbeam concentrator is designed in the form of a prism (1) which has faces (2, 3, 4) for the entry, reflection and exit of beams. The concentrator according to the invention is characterised in that a material layer (5) having a spatial hologram generated therein is arranged on the entry face (2) and/or on the reflection face (3). Said hologram is of the transmission type if it is located on the entry face (2), and of the reflection type if it is located on the reflection face (3). In each case, the structure of the hologram is such that the radiation is introduced into the prism (1) at an angle of total reflection. The production process for the sunbeam concentrator is based on recording an interference pattern from a reference bundle (6) and an object bundle (7) of a laser beam in a light-sensitive layer (5). The light- sensitive layer (5) is applied to the entry face (2) and/or to the reflection face (3) of the prism (1). The interference pattern is recorded by guiding the reference bundle (6) in the direction of the radiation to be concentrated and the object bundle (7) at an angle ( theta ) of total reflection for the materials of the light-sensitive layer (5) and prism (1). The concentrator is preferably provided for use in devices for converting solar energy into thermal or electric energy.