Optical system and lighting device comprised thereof

摘要

The present disclosure describes embodiments of an optical system for use in a lighting device, e.g., replacements for MR/PAR/R directional lamps. In one embodiment, the optical system comprises optical elements (e.g., a lens element) with features that form light from a light source into a light beam. In one embodiment, the optical elements have a plurality of focus points, which do not all converge to a single focus point proximate the light source. Rather one or more of the focus points are spaced apart from the light source so the collective configuration of focus points causes the light beam to exhibit favorable characteristics.

主权项

1. A lighting device, comprising:
a light source comprising an array of light-emitting diodes, the light source aligned on an optical axis; and a beam forming optical system to form light from the light source into a light beam, the beam forming optical system comprising an optical element having a plurality of focus points, at least one of which is spaced apart from the optical axis and falls outside of an imaging region that bounds the light source, the imaging region having a boundary spaced apart from the light source; wherein the beam forming optical system further comprises a frusto-conical reflector that revolves about the optical axis, and wherein the frusto-conical reflector has an entrance aperture proximate the light source and an exit aperture proximate the optical element.