LENS ASSEMBLY FOR REMOTE PHOSPHOR LED DEVICE

摘要

Lens assemblies for use in remote phosphor lighting systems, and methods of making and using them, are described. The lens assemblies typically include a lens member, a dichroic reflector attached to an outer surface of the lens member, and a phosphor layer attached to an inner surface of the lens member. The dichroic reflector reflects LED light originating from a given source point in a reference plane proximate the inner surface to a given image point in the reference plane. The phosphor layer may be patterned to cover one or more first portions of the inner surface and to expose one or more second portions, and/or the phosphor layer may be removably bonded to the inner surface. The lens assemblies can be readily combined with one or more short wavelength (e.g. blue) LEDs and other components to provide a remote phosphor lighting system.

主权项

1. A lens assembly for use in a remote phosphor LED device, comprising:
a lens member having an outer surface and an inner surface, the outer surface being curved to define an optical axis that intersects the inner surface; a dichroic reflector attached to at least a portion of the outer surface, the dichroic reflector being configured to reflect LED light originating from a given source point in a reference plane proximate the inner surface to a given image point in the reference plane; and a phosphor layer attached to at least a portion of the inner surface, the phosphor layer adapted to emit phosphor light; wherein the dichroic reflector is adapted to transmit the phosphor light; and wherein (a) the phosphor layer is patterned to cover one or more first portions of the inner surface and to expose one or more second portions of the inner surface, the given image point being disposed proximate the one or more first portions and the given source point being disposed proximate the one or more second portions, and/or (b) the phosphor layer is removably bonded to the inner surface.