| 摘要 |
FIELD: electricity.SUBSTANCE: illuminator comprises a heat conductive base with a hole for radiation release, light emitting diodes (LEDs) fixed along the periphery of the hole, which emit primary radiation, at the distance from which at one side of the hole there are the following components arranged in series: a converter of primary radiation, made in the form of a concave layer of a photoluminescent material, and a light reflector with a concave light-reflecting surface, facing with concavities the LED and the output hole. The illuminator also comprises the second radiation converter arranged at the other side of the hole, having a flat or convex shape. Secondary radiation formed during ingress of primary radiation onto the surface of the converter, exits into a hole in the heat conductive base and excites the photoluminescent material of the second converter of radiation, resulting in emission of the tertiary radiation, besides, the white light produced as a result of mixing of the secondary and tertiary radiation exits from the second converter.EFFECT: increased light homogeneity and coefficient of colour rendition with low form factor of an illuminator.17 cl, 17 dwg, 1 tbl |
