Patent ID: 6274860
Filing Date: 2001-08-14
Classification: F24S,G02B,G03H,H01L,Y02B,Y02E

Abstract:
A holographic planar concentrator for collecting and concentrating optical radiation, said holographic planar concentrator comprising(a) at least one planar highly transparent plate;(b) at least one multiplexed holographic optical film mounted on a surface thereof to form a light guiding structure, said at least one multiplexed holographic optical film having recorded therein a plurality of diffractive structures having two or more regions which are angularly and spectrally multiplexed, said multiplexed hologram adapted to couple said optical radiation into said planar highly transparent plate such that said optical radiation is not lost and travels through both said planar highly transparent plate and said multiplexed holographic optical film, said multiplexed holographic film being multiplexed to reduce recoupling losses in said holographic planar concentrator; and(c) at least one photovoltaic cell secured beneath said at least one multiplexed holographic optical film, on a side opposite to that upon which solar radiation is incident, each such photovoltaic cell bounded laterally by at least one said multiplexed holographic optical element recorded in at least one film.