Inner lens optics for omnidirectional lamp

摘要

An optical element for a lamp or lighting apparatus having at least one light emitting diode (LED) as a light source is provided. The optical element is positioned proximate to the LED and receives light rays therefrom. In turn, the optical element distributes the substantially unidirectional light output from the LED into an omnidirectional output with a controlled variance in light intensity at different directions about the LED. A diffuser can also be used around the optical element and LED to provide further distribution of the light rays by e.g., light scattering.

主权项

1. A lighting apparatus, comprising:
at least one light emitting diode; an optical element positioned adjacent to said at least one light emitting diode, said optical element defining a central axis and a lateral axis that is substantially orthogonal to the central axis, said optical element extending circumferentially about the central axis and comprising:
a convex light receiving surface that is substantially symmetrical about the central axis and positioned adjacent to said at least one light emitting diode;a frustoconical light projecting surface positioned laterally outside of the convex light receiving surface and substantially symmetrical about the central axis; andan arcuate light reflecting surface positioned laterally inside of the frustoconical light projecting surface and substantially symmetrical about the central axis, the arcuate light reflecting surface spaced apart along the central axis from the convex light receiving surface; wherein the optical element distributes the light output from the at least one light emitting diode into a substantially omnidirectional output.