Method and System for Managing Light from a Light Emitting Diode

摘要

A light source, for example a light emitting diode, can emit light and have an associated optical axis. The source can be deployed in applications where it is desirable to have illumination biased laterally relative to the optical axis, such as in a street luminaire where directing light towards a street is beneficial. The source can be coupled to an optic that comprises a cavity. At least a portion of the cavity can have an outline that is egg-shaped in cross section. A backside of the cavity (or a backside portion of the optic) can have an irregular shape for receiving the light emitting diode, for example to form a receptacle shaped to fit a circuit

主权项

1. An illumination system comprising:
an optic comprising an interior surface that defines a cavity and an exterior surface opposite the interior surface; and a light emitting diode disposed to emit light into in the cavity, wherein the optic is operable to:
transmit and emit a first portion of the emitted light that is oriented in a street side direction;with a region of the interior surface, focus a second portion of the emitted light that is oriented in a house side direction;with a surface that is internally reflective, receive the focused second portion of the emitted light and redirect the focused second portion in the street side direction;with a region of the exterior surface, receive a third portion of the emitted light that is oriented in a house side direction and internally reflect the received third portion to a backside of the optic; andsend street side a portion of the internally reflected third portion that is incident on the backside of the optic.