# US 10,374,380 B1 · Laser diode pumped white light emitter module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,380 B1 - Document ID: US10374380B1 - Status: Granted - Kind: B1 - Application number: 15/976,188 - Filed: 2018-05-10 - Granted: 2019-08-06 - Earliest claimed: 2018-05-10 - Applicants: Brant C. McLellan - Inventors: Brant C. McLellan - Web page: https://patentgrep.com/patent/US10374380B1 ## CPC - H01S 5/0087: {for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials} - H01S 3/005: {Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping (shaping laser beam for working metal or other materials B23K26/06; optical elements, systems or apparatus in general G02B)} - H01S 3/0612: {Non-homogeneous structure (H01S3/07 takes precedence)} - H01S 3/07: consisting of a plurality of parts, e.g. segments (H01S3/067 takes precedence) - H01S 3/08054: {Passive cavity elements acting on the polarization, e.g. a polarizer for branching or walk-off compensation (quarter-wave plates in a Q-switch laser H01S3/1124, H01S3/115)} - H01S 3/09415: {the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping} - H01S 5/0071: {for beam steering, e.g. using a mirror outside the cavity to change the beam direction} - H01S 5/02: Structural details or components not essential to laser action - H01S 5/02469: {Passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active cooling element like a TEC} - H01S 5/02208: characterised by the shape of the housings - H01S 5/02212: Can-type, e.g. TO-CAN housings with emission along or parallel to symmetry axis - H01S 5/4025: {Array arrangements, e.g. constituted by discrete laser diodes or laser bar (H01S5/42 takes precedence)} - H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL ## Abstract An apparatus includes a thermally conductive housing including a reflective chamber, the reflective chamber including a reflective surface on a first side of the reflective chamber and an orifice on a second side of the reflective chamber. The reflective surface includes a converging surface annularly surrounding a central recirculating surface. The apparatus includes a phosphor converter at the orifice of the reflective chamber. The apparatus further includes a plurality of laser diodes arranged annularly around the orifice, the plurality of laser diodes configured to emit laser beams towards the converging surface. ## Claims ### Claim 1 An apparatus comprising: a thermally conductive housing comprising a reflective chamber, the reflective chamber comprising a reflective surface on a first side of the reflective chamber and an orifice on a second side of the reflective chamber, wherein the reflective surface comprises a converging surface annularly surrounding a central recirculating surface, wherein the reflective chamber is formed by a heat sink and a reflector coupled to the heat sink, wherein the reflector comprises the reflective surface and the heat sink comprises the orifice; a phosphor converter at the orifice of the reflective chamber; a plurality of laser diodes arranged annularly around the orifice, the plurality of laser diodes configured to emit laser beams towards the converging surface. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the converging surface is a parabolic surface configured to converge the laser beams at the phosphor converter. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the recirculating surface is a spherical surface configured to reflect back recirculating light from the phosphor converter. ### Claim 4 (depends on 1) The apparatus of claim 1, the heat sink comprising a conical cavity below the orifice. ### Claim 5 (depends on 1) The apparatus of claim 1, the heat sink comprising a plurality of apertures arranged annularly around the central orifice to receive the plurality of laser diodes. ### Claim 6 (depends on 1) The apparatus of claim 1, the heat sink comprising a protruding rim on a first side of the heat sink, the protruding rim annularly surrounding the plurality of apertures. ### Claim 7 (depends on 6) The apparatus of claim 6, the heat sink comprising a plurality of projections extending out a second side of the heat sink. ### Claim 8 (depends on 1) The apparatus of claim 1, the heat sink comprising: a conical cavity below the orifice; a plurality of apertures arranged annularly around the central orifice to receive the plurality of laser diodes; a protruding rim on a first side of the heat sink, the protruding rim annularly surrounding the plurality of apertures; and a plurality of projections extending out a second side of the heat sink. ### Claim 9 (depends on 1) The apparatus of claim 1, the apparatus comprising an odd number of laser diodes. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the odd number of laser diodes are equally spaced around the orifice. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the reflective chamber comprises a conical cavity, a cylindrical cavity, and a cup-shaped cavity, and wherein the conical cavity is between the orifice and the cylindrical cavity, and wherein the cylindrical cavity is between the cup-shaped cavity and the conical cavity. ### Claim 12 (depends on 1) The apparatus of claim 1, the apparatus comprising an even number of laser diodes. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the even number of laser diodes are unequally spaced around the orifice. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the plurality of laser diodes arranged annularly around the orifice are aligned with the converging surface. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein: the converging surface is a parabolic surface configured to converge the laser beams at the phosphor converter; and the recirculating surface is a spherical surface configured to reflect back recirculating light from the phosphor converter. ### Claim 16 A method comprising: projecting laser beams from a plurality of laser diodes onto a converging surface of a reflective chamber of an emitter module, wherein the reflective chamber is formed by a heat sink and a reflector coupled to the heat sink; reflecting the laser beams to converge on a phosphor converter at an orifice of the reflective chamber, wherein the reflector comprises the reflective surface and the heat sink comprises the orifice; and recirculating reflected light and recirculated light from the phosphor converter back to the phosphor converter. ### Claim 17 (depends on 16) The method of claim 16, wherein the converging surface annularly surrounds a central recirculating surface. ### Claim 18 (depends on 17) The method of claim 17, wherein the central recirculating surface is a spherical surface. ### Claim 19 (depends on 16) The method of claim 16, wherein projecting laser beams from a plurality of laser diodes onto a converging surface comprises projecting collimated light onto the converging surface.