# US 10,119,662 B2 · Lens with controlled light refraction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,662 B2 - Document ID: US10119662B2 - Status: Granted - Kind: B2 - Application number: 15/236,612 - Filed: 2016-08-15 - Published: 2016-12-01 - Granted: 2018-11-06 - Earliest claimed: 2009-04-28 - Assignees: Cree, Inc. - Applicants: Cree, Inc. - Inventors: Kurt S. Wilcox; Craig Raleigh; Corey Goldstein - Web page: https://patentgrep.com/patent/US10119662B2 ## CPC - F21V 5/007: {Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V5/008)} - F21K 9/69: Details of refractors forming part of the light source - F21V 5/04: of lens shape - F21V 7/0091: {using total internal reflection} - G02B 19/0014: {at least one surface having optical power} - G02B 19/0061: {the light source comprising a LED} - F21Y 2115/10: Light-emitting diodes [LED] - G02B 2003/0093: {characterised by the shape} - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 lens for distribution of light from a light emitter having an emitter axis. The lens including an outer surface receiving light from the inner surface which defines an inner cavity and includes an axial inner-surface portion of a conical shape formed by a substantially cross-sectionally linear inner region extending outwardly from positions at the emitter axis toward an open end of the inner cavity. An LED light fixture comprising a mounting structure supporting a plurality of spaced LED light sources with a plurality of the lenses each in alignment with a corresponding one of the light sources. ## Claims ### Claim 1 A lens for distribution of light from a light emitter having an emitter axis, comprising: a refracting inner surface defining an inner cavity with an open end, the inner surface comprising an axially-adjacent inner-surface portion of a substantially conical shape formed by a substantially cross-sectionally linear inner region extending outwardly away from the emitter axis toward the open end of the inner cavity; and an outer surface receiving light from the inner surface and including an axial output region configured for receiving light from the axially-adjacent inner-surface portion and refracting it away from the emitter axis. ### Claim 2 (depends on 1) The lens of claim 1 wherein the open end into the inner cavity is formed by an open-end inner-surface portion shaped differently than the axially-adjacent inner-surface portion. ### Claim 3 (depends on 2) The lens of claim 2 wherein the open-end inner-surface portion is substantially cross-sectionally convex for refracting emitter light rays toward the emitter axis. ### Claim 4 (depends on 3) The lens of claim 3 wherein the open-end inner-surface portion is a substantial portion of the inner surface and adjoins the axially-adjacent inner-surface portion which is another substantial portion of the inner surface. ### Claim 5 (depends on 1) The lens of claim 1 wherein the axial output region of the outer surface is substantially concave and is surrounded by a substantially convex region of the outer surface. ### Claim 6 (depends on 5) The lens of claim 5 wherein the convex output region of the outer surface transitions away from the emitter axis toward a base-adjacent outer-surface region being substantially free from receiving any emitter light. ### Claim 7 (depends on 6) The lens of claim 6 wherein the base-adjacent outer-surface region is substantially parallel to the emitter axis. ### Claim 8 (depends on 5) The lens of claim 5 wherein: the outer surface is substantially rotationally symmetrical; and the axial output region is substantially circular in planes substantially orthogonal to the emitter axis. ### Claim 9 (depends on 8) The lens of claim 8 wherein the inner-cavity surface is substantially rotationally symmetrical. ### Claim 10 (depends on 1) The lens of claim 1 wherein the inner-cavity surface is substantially rotationally symmetrical. ### Claim 11 An LED light fixture comprising a mounting structure supporting a plurality of spaced LED light sources with a plurality of lenses each in alignment with a corresponding one of the light sources, each of the lenses having an outer surface receiving light from a refracting inner surface which defines an inner cavity with an open end, the inner surface comprising an axially-adjacent inner-surface portion of a substantially conical shape formed by a substantially cross-sectionally linear inner region extending outwardly away from a corresponding emitter axis toward the open end of the inner cavity, the outer surface including an axial output region configured for receiving light from the axially-adjacent inner-surface portion and refracting it away from the axis. ### Claim 12 (depends on 11) The light fixture of claim 11 wherein the open end into the inner cavity is formed by an open-end inner-surface portion shaped differently than the axially-adjacent inner-surface portion. ### Claim 13 (depends on 12) The light fixture of claim 12 wherein the open-end inner-surface portion is substantially cross-sectionally convex for refracting emitter light rays toward the emitter axis. ### Claim 14 (depends on 13) The light fixture of claim 13 wherein the open-end inner-surface portion is a substantial portion of the inner surface and adjoins the axially-adjacent inner-surface portion which is another substantial portion of the inner surface. ### Claim 15 (depends on 11) The light fixture of claim 11 wherein the axial output region of the outer surface is substantially concave and is surrounded by a substantially convex region of the outer surface. ### Claim 16 (depends on 15) The light fixture of claim 15 wherein the convex output region of the outer surface transitions away from the emitter axis toward a base-adjacent outer-surface region being substantially free from receiving any emitter light. ### Claim 17 (depends on 11) The light fixture of claim 11 wherein: the outer surface is substantially rotationally symmetrical; and the axial output region is substantially circular in planes substantially orthogonal to the emitter axis. ### Claim 18 (depends on 11) The light fixture of claim 11 wherein the inner-cavity surface is substantially rotationally symmetrical.