Asymmetrical Optical System

摘要

An asymmetrical optical assembly employs reflecting surfaces and a lens to combine the light from a plurality of LED lamps into an illumination pattern useful in a floodlight or work light. The reflecting surfaces and lens optical element are not symmetrical with respect to a plane bisecting the optical assembly and including the optical axes of the LED light sources. Some light from the LED light sources is redirected from its emitted trajectory into the desired illumination pattern, while a significant portion of the light from the LED light sources is permitted to exit the optical assembly without redirection. Minimizing the number of optical elements employed and the redirection of light enhances the efficiency of the resulting light assembly.

主权项

1. A light assembly having an illumination pattern, said light assembly comprising:
an LED light source comprising a light emitting die and having an optical axis extending from said light emitting die and perpendicular to a first plane, said LED emitting light within a hemisphere centered on said optical axis, said hemisphere bisected by a second plane including said optical axis and perpendicular to said first plane; a reflecting surface spaced from said second plane in a first direction, said reflecting surface arranged to redirect light from a range of emitted angles at which said light is emitted from said LED light source into a range of reflected angles with respect to said second plane, said range of reflected angles including angles defining a first trajectory of light emission convergent with and passing through said second plane in a second direction opposite the first direction; and an optical element in the path of light emitted from said LED light source, said optical element comprising light entry and light emission surfaces configured to refract at least a portion of light emitted from said LED light source passing through said optical element into a range of refracted angles with respect to said second plane, said range of refracted angles including angles defining a second trajectory of light emission convergent with and passing through said second plane in the second direction; wherein said optical element is asymmetrical with respect to said second plane.