# US 8,465,172 B2 · Lighting module with diffractive optical element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,172 B2 - Document ID: US8465172B2 - Status: Granted - Kind: B2 - Application number: 12/641,161 - Filed: 2009-12-17 - Published: 2011-06-23 - Granted: 2013-06-18 - Earliest claimed: 2009-12-17 - Assignees: Phoseon Technology, Inc. - Applicants: Jonathan L. Marson - Inventors: Jonathan L. Marson - Web page: https://patentgrep.com/patent/US8465172B2 ## CPC - G02B 19/0066: {in the form of an LED array} - G02B 19/0009: {having refractive surfaces only} - G02B 19/0014: {at least one surface having optical power} - G02B 19/0095: {for use with ultraviolet radiation} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A lighting module having an array of light-emitting elements on a substrate, at least one diffractive optical element arranged to receive light from the light-emitting elements and partially collimate the light. A method of packaging a lighting module including mounting at least one array of light-emitting elements on a substrate in a package, and enclosing the package with a window, the window has a diffractive optical element on a surface of the window closest to the array, the diffractive optical element arranged to partially collimate the light. A lighting module having an array of light-emitting elements on a substrate, at least one diffractive optical element arranged to receive light from the light-emitting elements and scatter the light into a random emission pattern to produce a uniform irradiance at a target surface. ## Claims ### Claim 1 A lighting module, comprising: an array of light-emitting elements on a substrate; a package containing the array of light-emitting elements and the substrate, the package enclosed with a window, wherein the window has two surfaces; an array of diffractive optical elements mounted to one of the surfaces of the window such that a gap exists between the array of diffractive optical elements and the array of light-emitting elements, each diffractive optical element corresponding to a light-emitting element, the diffractive optical elements arranged to receive light from the light-emitting elements and so as to only partially collimate the light; a lens element arranged adjacent to each light-emitting element to capture the light from the element; and a target surface arranged at a distance from the lighting module to receive a uniform distribution of the partially collimated light. ### Claim 2 (depends on 1) The lighting module of claim 1, wherein the uniform distribution of the partially collimated light comprises a distribution having less than 30% divergence over the target surface. ### Claim 3 (depends on 1) The lighting module of claim 1, wherein a second diffractive optical element is arranged to scatter light into a random emission pattern to produce a uniform irradiance at a target work surface. ### Claim 4 (depends on 1) The lighting module of claim 1, wherein each of the diffractive optical elements comprises a holographic optical element. ### Claim 5 (depends on 1) The lighting module of claim 1, wherein each of the diffractive optical elements has a focal point in a first axis. ### Claim 6 (depends on 3) The lighting module of claim 3, wherein the second diffractive optical element has a focal point in a first axis. ### Claim 7 (depends on 5) The lighting module of claim 5, wherein each of the diffractive optical elements partially collimates the light in a second axis. ### Claim 8 (depends on 1) The lighting module of claim 1, wherein the gap exists between the lens element and the window. ### Claim 9 (depends on 1) The lighting module of claim 1, wherein the gap is filled with one of either air or a gel material. ### Claim 10 (depends on 9) The lighting module of claim 9, wherein the gel material comprises a material that is index matched to at least one of the window or the light-emitting elements. ### Claim 11 A method of packaging a lighting module, comprising: mounting at least one array of light-emitting elements on a substrate in a package; and enclosing the package with a window, the window having two surfaces, the window having an array of diffractive optical elements mounted to the surface closest to the light-emitting element array such that a gap exists between the array of diffractive optical elements and the array of light-emitting elements, each diffractive optical element corresponding to a light-emitting element, the array of diffractive optical elements arranged at a distance to only partially collimate light at a target surface arranged at a distance from the lighting module so as to receive a uniform distribution of the partially collimated light. ### Claim 12 (depends on 11) The method of claim 11, wherein the diffractive optical elements are holographic optical elements. ### Claim 13 (depends on 11) The method of claim 11, wherein the window has pre-existing diffractive optical elements on the surface. ### Claim 14 (depends on 11) The method of claim 11, further comprising: dispensing a gel over the array of light-emitting elements; and mounting a transparent substrate on the gel, the transparent substrate having a second diffractive optical element on a surface. ### Claim 15 (depends on 14) The method of claim 14, wherein the second diffractive optical element comprises an array of diffractive optical elements. ### Claim 16 (depends on 11) The method of claim 11, further comprising arranging a lens adjacent to each light-emitting element inside the package. ### Claim 17 (depends on 11) The method of claim 11, further comprising allowing the gap to fill with air. ### Claim 18 (depends on 11) The method of claim 11, further comprising filling the gap with a gel material. ### Claim 19 (depends on 18) The method of claim 18, further comprising filling the gap with a gel material that is index matched to at least one of the window and the light-emitting elements. ### Claim 20 A method comprising: projecting partially collimated light from a lighting module to a target surface arranged at a distance from the lighting module so as to receive a uniform distribution of the partially collimated light, wherein the lighting module includes at least one array of light-emitting elements mounted on a substrate in a package; and a window enclosing the package, the window having two surfaces and an array of diffractive optical elements mounted to one of the surfaces of the window such that a gap exists between the array of diffractive optical elements and the array of light-emitting elements, each diffractive optical element corresponding to a light-emitting element, the diffractive optical elements arranged to receive light from the light-emitting elements; only partially collimating the light from the light-emitting elements via the diffractive optical elements; and uniformly curing a material at the target surface in a predetermined amount of time.