# US 11,442,282 B2 · Optical element including a plurality of regions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,282 B2 - Document ID: US11442282B2 - Status: Granted - Kind: B2 - Application number: 16/661,651 - Filed: 2019-10-23 - Published: 2020-04-30 - Granted: 2022-09-13 - Earliest claimed: 2018-10-26 - Assignees: Viavi Solutions Inc. - Applicants: Viavi Solutions Inc. - Inventors: Tasso R. M. Sales; George Michael Morris - Web page: https://patentgrep.com/patent/US11442282B2 ## CPC - G02B 27/0944: {Diffractive optical elements, e.g. gratings, holograms (gratings per se G02B5/18; holograms used as optical elements per se G02B5/32)} - G02B 27/0961: {Lens arrays (lens arrays per se G02B3/0006)} - G02B 5/0215: {the surface having a regular structure} - G02B 5/0221: {the surface having an irregular structure (G02B5/0226 takes precedence)} - G02B 5/0252: {using holographic or diffractive means} - G02B 5/18: Diffraction gratings {(holographic optical elements G02B5/32, G03H; integrally combined with optical fibres G02B6/02057; for coupling light guides G02B6/34; integrally combined with optical integrated light guides G02B6/12; grating systems G02B27/44)} - G02B 27/0927: {Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat} - G02B 27/48: Laser speckle optics - G06F 3/017: {Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883)} - G02B 5/1866: {Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials (G02B5/1809, G02B5/1828, G02B5/1833, G02B5/1838 and G02B5/1847 take precedence)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract An optical element comprising a body having a surface, wherein the surface has a plurality of regions periodically arranged in a tessellation, and wherein each region of the plurality of regions has a random spatial distribution of microstructures is disclosed. An optical system comprises a light source; and the optical element is also disclosed. Methods of making and using the optical element and the optical system are also disclosed. ## Claims ### Claim 1 An optical element comprising: a body having a surface, wherein the surface has a plurality of regions periodically arranged in a tessellation; wherein each region of the plurality of regions has an outer geometric boundary, wherein two or more regions of the plurality of regions have different outer geometric boundaries in a polygon shape; and wherein each region of the plurality of regions has a random spatial distribution of microstructures. ### Claim 2 (depends on 1) The optical element according to claim 1, wherein each region can be arranged in a repeating sequence in two orthogonal dimensions. ### Claim 3 (depends on 1) The optical element according to claim 1, wherein each region of the plurality of regions has an identical random spatial distribution of microstructures. ### Claim 4 (depends on 1) The optical element according to claim 1, wherein two or more regions of the plurality of regions have different random spatial distributions of microstructures. ### Claim 5 (depends on 1) The optical element according to claim 1, wherein the microstructures are saddle shaped. ### Claim 6 (depends on 1) The optical element according to claim 1, wherein the body having a surface includes a first surface and a second surface. ### Claim 7 (depends on 6) The optical element according to claim 6, wherein the second surface is oppositely oriented the first surface. ### Claim 8 (depends on 1) The optical element according to claim 1, wherein the body also has a second surface, wherein the second surface has a plurality of regions periodically arranged in a second tessellation, and wherein each region of the plurality of regions has a random spatial distribution of microstructures. ### Claim 9 An optical system, comprising: a light source, and an optical element including a body having a surface, wherein the surface has a plurality of regions periodically arranged in a tessellation, wherein each region of the plurality of regions has an outer geometric boundary, wherein two or more regions of the plurality of regions have different outer geometric boundaries in a polygon shape, and wherein each region of the plurality of regions has a random spatial distribution of microstructures. ### Claim 10 (depends on 9) The optical system according to claim 9, wherein the light source is a coherent light source. ### Claim 11 (depends on 10) The optical system according to claim 10, wherein the coherent light source is a laser. ### Claim 12 (depends on 10) The optical system according to claim 10, wherein the optical element projects a target pattern in accordance with the random spatial distribution of microstructures. ### Claim 13 (depends on 12) The optical system according to claim 12, wherein the target pattern is a random distribution of spots over a specified angular range. ### Claim 14 (depends on 12) The optical system according to claim 12, wherein the target pattern is different in two perpendicular directions. ### Claim 15 (depends on 9) The optical system according to claim 9, wherein a period defining the periodic arrangement is smaller than a size of an input beam from the light source in order to increase a contrast of a target pattern and fix speckle. ### Claim 16 A method of using an optical system, comprising: projecting an input beam from a light source to an optical element, wherein the optical element includes a body having a surface, wherein the surface has a plurality of regions periodically arranged in a tessellation, wherein each region of the plurality of regions has an outer geometric boundary, wherein two or more regions of the plurality of regions have different outer geometric boundaries in a polygon shape, and wherein each region of the plurality of regions has a random spatial distribution of microstructures; and shaping the input beam into a target pattern. ### Claim 17 (depends on 16) The method according to claim 16, further comprising fixing any speckle from the random spatial distribution of microstructures from varying with any movement of the input beam relative to the optical element.