OMNI-DIRECTIONAL REFLECTOR COMPRISING A FRUSTO-CONICAL SURFACE FOR A LIGHT-EMITTING DIODE

摘要

An optical element (100) for a lamp or illumination device having a single light emitting diode (LED) as a light source, comprising: an optical element (100) for dispersing unidirectional light output from the LED into a forward output, Is provided. For example, a diffuser may also be used around the optical element and the LED to provide additional dispersion of light by scattering. The optical element 100 is disposed adjacent to the LED and defines a central axis CA and a transverse axis L that is substantially perpendicular to the central axis CA. The optical element 100 includes a convex light receiving surface 102 extending in the circumferential direction around the central axis CA and disposed symmetrically with respect to the central axis CA and adjacent to the LED, A truncated conical light projection surface 104 disposed laterally outside of the truncated cone light projection surface 104 and substantially symmetrical with respect to the central axis CA and a central truncated conical light projection surface 104 disposed laterally from the inside of the truncated conical light projection surface 104, And the light reflecting surface 114 of the curved surface is spaced apart from the convex light receiving surface 102 along the central axis CA. The light reflecting surface 114 of the curved surface is substantially symmetrical with respect to the convex light receiving surface 114. [