# US 9,435,510 B2 · Method and system for managing light from a light emitting diode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,510 B2 - Document ID: US9435510B2 - Status: Granted - Kind: B2 - Application number: 14/729,941 - Filed: 2015-06-03 - Published: 2015-11-26 - Granted: 2016-09-06 - Earliest claimed: 2011-02-28 - Assignees: Cooper Technologies Company - Applicants: Cooper Technologies Company - Inventors: Kevin Charles Broughton - Web page: https://patentgrep.com/patent/US9435510B2 ## CPC - F21V 5/04: of lens shape - F21S 8/032: {the surface being a floor or like ground surface, e.g. pavement} - F21V 3/02: characterised by the shape - F21V 5/08: producing an asymmetric light distribution - F21V 7/0066: {specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified (F21V7/16 - F21V7/30 take precedence)} - F21V 7/0091: {using total internal reflection} - F21V 7/28: characterised by coatings - F21V 13/04: the elements being reflectors and refractors {(for vehicle rear lights F21S43/40)} - F21V 15/01: Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) - G02B 5/045: {Prism arrays} - G02B 5/124: plural reflecting elements forming part of a unitary plate or sheet - G02B 5/13: plural curved refracting elements forming part of a unitary body - G02B 17/086: {wherein the system is made of a single block of optical material, e.g. solid catadioptric systems} - G02B 19/0028: {refractive and reflective surfaces, e.g. non-imaging catadioptric systems} - G02B 19/0061: {the light source comprising a LED} - F21W 2131/103: of streets or roads - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract 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 an inner surface facing the source and an outer surface that is opposite the inner surface. The inner surface can comprise a refractive surface that receives light headed away from the optical axis of the light source, for example opposite the street. The refractive surface can form the received light into a beam. The outer surface of the optic can reflect the beam back across the optical axis, for example so that light headed away from the street is redirected towards the street. ## Claims ### Claim 1 An illumination system comprising: an optic comprising an inner surface that forms a cavity and an outer surface; and a light emitting diode that is oriented to emit light into the cavity and that has an optical axis, wherein the inner surface and the outer surface are asymmetrical with respect to the optical axis, wherein the inner surface comprises a refractive surface that is located on a first side of the optical axis, that bulges into the cavity, and that forms a beam within the optic, and wherein the outer surface comprises a total internally reflective surface that is located on the first side of the optical axis and that is positioned to receive the formed beam and to reflect the formed beam across the optical axis to a second side of the optical axis. ### Claim 2 (depends on 1) The illumination system of claim 1, wherein the refractive surface comprises a lens. ### Claim 3 (depends on 1) The illumination system of claim 1, wherein the refractive surface comprises a collimating lens. ### Claim 4 (depends on 1) The illumination system of claim 1, wherein the refractive surface comprises a focusing element. ### Claim 5 (depends on 1) The illumination system of claim 1, wherein the optic comprises a street side and a house side. ### Claim 6 (depends on 1) The illumination system of claim 1, wherein the first side of the optical axis comprises a house side, and wherein the second side of the optical axis comprises a street side. ### Claim 7 (depends on 1) The illumination system of claim 1, wherein an array of optics comprises the optic, wherein an array of light emitting diodes comprises the light emitting diode, and wherein the illumination system comprises a street luminaire. ### Claim 8 An illumination system comprising: a light emitting diode having an optical axis; and a lens comprising: an inner surface that faces the light emitting diode, that is asymmetric with respect to the optical axis, and that comprises a convex refractive surface disposed on a side of the optical axis; and an outer surface that is asymmetric with respect to the optical axis and that comprises an internally reflective surface, the internally reflective surface disposed on the side of the optical axis in a position to receive a beam of light formed by the convex refractive surface and to reflect the received beam across the optical axis. ### Claim 9 (depends on 8) The illumination system of claim 8, wherein the convex refractive surface comprises a lens. ### Claim 10 (depends on 8) The illumination system of claim 8, wherein the convex refractive surface comprises a collimating lens. ### Claim 11 (depends on 8) The illumination system of claim 8, wherein the convex refractive surface comprises a focusing element. ### Claim 12 (depends on 8) The illumination system of claim 8, wherein the internally refractive surface comprises a totally internally reflective surface. ### Claim 13 (depends on 8) The illumination system of claim 8, wherein the side of the optical axis comprises a house side. ### Claim 14 (depends on 8) The illumination system of claim 8, wherein the lens comprises a house side and a street side, wherein an array of lenses comprises the lens, and wherein an array of light emitting diodes comprises the light emitting diode. ### Claim 15 (depends on 8) The illumination system of claim 8, wherein the illumination system comprises a street luminaire. ### Claim 16 A lens comprising: an inner surface forming a cavity sized to receive light from an LED source that has an optical axis; and an outer surface opposite the inner surface, wherein a cross section of the lens taken at the optical axis shows asymmetry of the inner surface with respect to the optical axis and asymmetry of the outer surface with respect to the optical axis, and wherein the cross section comprises: a first portion of the outer surface defining a total internally reflective surface located on a side of the optical axis; and a second portion of the inner surface defining a focusing element that is located on the side of the optical axis for forming a beam extending within the lens between the focusing element and the totally internally reflective surface. ### Claim 17 (depends on 16) The lens of claim 16, wherein the focusing element comprises a lens. ### Claim 18 (depends on 16) The lens of claim 16, wherein the focusing element comprises a convex refractive surface. ### Claim 19 (depends on 16) The lens of claim 16, further comprising a house side and a street side. ### Claim 20 (depends on 16) The lens of claim 16, wherein a house side of the lens is disposed on the side of the optical axis, opposite a street side of the lens.