# US 10,120,337 B2 · Adjustable scanned beam projector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,120,337 B2 - Document ID: US10120337B2 - Status: Granted - Kind: B2 - Application number: 15/344,130 - Filed: 2016-11-04 - Published: 2018-05-10 - Granted: 2018-11-06 - Earliest claimed: 2016-11-04 - Assignees: Microsoft Technology Licensing, LLC - Applicants: Microsoft Technology Licensing, LLC - Inventors: Andrew Maimone; Joel S. Kollin; Joshua Owen Miller - Web page: https://patentgrep.com/patent/US10120337B2 ## CPC - G03H 1/2645: {Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing} - G02B 27/0025: {for optical correction, e.g. distorsion, aberration} - G02B 27/0172: {characterised by optical features} - G03H 1/0248: {Volume holograms} - G03H 1/2286: {Particular reconstruction light (G03H1/24 takes precedence); Beam properties} - G03H 1/265: {Angle multiplexing; Multichannel holograms (G03H1/268 takes precedence)} - G03H 1/28: superimposed holograms only - G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)} - G02B 2027/0174: {holographic} - G03H 2001/2284: {Superimposing the holobject with other visual information} - G03H 2001/2292: {Using scanning means} - G03H 2001/2615: {in physical contact, i.e. layered holograms} - G03H 2001/266: {Wavelength multiplexing} - G03H 2222/18: RGB trichrome light - G03H 2222/34: Multiple light sources - G03H 2222/36: Scanning light beam - G03H 2223/17: Element having optical power - G03H 2223/22: Polariser - G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00}) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Examples are disclosed herein relating to an adjustable scanning system configured to adjust light from an illumination source on a per-pixel basis. One example provides an optical system including an array of light sources, a holographic light processing stage comprising, for each light source in the array, one or more holograms configured to receive light from the light source and diffract the light, the one or more holograms being selective for a property of the light that varies based upon the light source from which the light is received, and a scanning optical element configured to receive and scan the light from the holographic light processing stage. ## Claims ### Claim 1 An optical system, comprising an array of light sources; a holographic light processing stage comprising, for each light source in the array, one or more holograms configured to receive light from the light source and diffract the light, the one or more holograms being selective for a property of the light that varies based upon the light source from which the light is received, and a scanning optical element configured to receive and scan the light from the holographic light processing stage. ### Claim 2 (depends on 1) The optical system of claim 1, wherein the holographic light processing stage is configured to vary an optical power of the light received from each light source based upon an angle of the light received from the light source. ### Claim 3 (depends on 1) The optical system of claim 1, wherein the holographic light processing stage is configured to correct one or more optical aberrations based upon an angle of the light received from the light sources. ### Claim 4 (depends on 1) The optical system of claim 1, wherein the holographic light processing stage comprises a volume hologram. ### Claim 5 (depends on 1) The optical system of claim 1, wherein the holographic light processing stage comprises a plurality of stacked holograms. ### Claim 6 (depends on 1) The optical system of claim 1, further comprising one or more of a switchable hologram and a variable power optical element. ### Claim 7 (depends on 1) The optical system of claim 1, further comprising a switchable polarizing element configured to receive the light from the array of light sources and output the light to the holographic light processing stage. ### Claim 8 (depends on 1) The optical system of claim 1, wherein two or more light sources of the array of light sources are configured to emit light of different wavelengths, and wherein the holographic light processing stage is wavelength selective. ### Claim 9 (depends on 1) The optical system of claim 1, wherein two or more light sources of the light source array are configured to output light of different polarizations. ### Claim 10 (depends on 1) The optical system of claim 1, further comprising a controller configured to control the array of light sources and the scanning optical element to vary a property of light output by the holographic light processing stage on a per-pixel basis. ### Claim 11 (depends on 1) The optical system of claim 1, further comprising an eye tracking unit configured to provide eye tracking data, and wherein the holographic light processing stage is configured to correct aberrations based upon the eye-tracking data. ### Claim 12 A holographic light processing structure, comprising a plurality of holograms each configured to diffract light received from a corresponding angle, two or more of the holograms being configured to diffract light received from different corresponding angles, and each hologram being configured to selectively impart a different optical characteristic on light for output by the holographic light processing structure. ### Claim 13 (depends on 12) The holographic light processing structure of claim 12, wherein the optical characteristic comprises an optical power. ### Claim 14 (depends on 12) The holographic light processing structure of claim 12, wherein the optical characteristic comprises an optical aberration correction. ### Claim 15 (depends on 12) The holographic light processing structure of claim 12, wherein the plurality of holograms comprises one or more of a volume hologram and a plurality of stacked holograms. ### Claim 16 A method of controlling a light field on a per-pixel basis, the method comprising: emitting light via a first light source of an array of light sources; receiving the light from the first light source at a holographic light processing stage comprising a plurality of holograms, a first hologram of the plurality of holograms being configured to selectively diffract light from the first light source; outputting light from the first light source diffracted by the first hologram; receiving the light from the first light source at a scanning optical element and scanning the light to direct the light toward a first pixel; emitting light via a second light source of the array of light sources; receiving the light from the second light source at the holographic light processing stage, a second hologram of the plurality of holograms being configured to selectively diffract light from the second light source; outputting the light from the second light source diffracted by the second hologram differently than the light from the first light source; and receiving the light from the second light source at the scanning optical element and scanning the light to direct the light toward a second pixel. ### Claim 17 (depends on 16) The method of claim 16, wherein the first hologram and the second hologram have different optical powers. ### Claim 18 (depends on 16) The method of claim 16, further comprising illuminating the second light source while illuminating the first light source, such that light diffracted by the first hologram and light diffracted by the second hologram are directed toward the first pixel. ### Claim 19 (depends on 18) The method of claim 18, further comprising illuminating the first light source and the second light source at different intensities to control a balance of optical properties of the first light source and the second lights source at the first pixel. ### Claim 20 (depends on 16) The method of claim 16, further comprising controlling the array of light sources and the scanning optical element to vary a property of light output by the holographic light processing stage on a per-pixel basis.