Apparatus for utilizing solar energy for the purpose of illuminating enclosed spaces not accessible to sunlight

摘要

The invention provides apparatus for utilising solar energy for illuminating an enclosed space inaccessible to sunlight comprising a solar ray concentrator (1), one or more optical fibres (2) illuminated from the concentrator and one or more diffusers (3) for diffusing the light coming from the optical fibre(s) in the enclosed space. The concentration may comprise mirrors and the diffuser may be formed by divergence of the optical fibres. IMAGE