# US 12,184,035 B2 · Light-emitting device, optical device, and measurement device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,035 B2 - Document ID: US12184035B2 - Status: Granted - Kind: B2 - Application number: 17/117,029 - Filed: 2020-12-09 - Published: 2021-08-26 - Granted: 2024-12-31 - Earliest claimed: 2020-02-26 - Assignees: FUJIFILM Business Innovation Corp. - Applicants: FUJIFILM Business Innovation Corp. - Inventors: Daisuke Iguchi - Web page: https://patentgrep.com/patent/US12184035B2 ## CPC - G01S 7/4815: {using multiple transmitters} - H01S 5/042: Electrical excitation {; Circuits therefor (monolithically integrated laser drive components H01S5/0261)} - G01S 7/484: Transmitters - G01S 17/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) - G01S 17/89: for mapping or imaging - H01S 5/02208: characterised by the shape of the housings - H01S 5/02345: Wire-bonding - 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 5/04256: {characterised by the configuration} - G01S 17/894: Three-dimensional [3D] imaging with simultaneous measurement of time-of-flight at a two-dimensional [2D] array of receiver pixels, e.g. time-of-flight cameras or flash lidar - H01S 5/04252: {characterised by the material} - H01S 5/04254: {characterised by the shape} - H01S 5/18311: {using selective oxidation} - H01S 5/18347: {Mesa comprising active layer} - H01S 5/18361: {Structure of the reflectors, e.g. hybrid mirrors} - H01S 5/3432: {the whole junction comprising only (AI)GaAs} - H01S 5/423: {having a vertical cavity} - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - 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 A light-emitting device includes a first base member; a laser unit provided on the first base member; a capacitive element that is provided on the first base member and supplies a driving electric current to the laser unit; a wiring board that is constituted by a second base member having lower thermal conductivity than the first base member and on which the first base member is mounted; and a driving unit that is mounted on the wiring board and drives the laser unit. ## Claims ### Claim 1 A light-emitting device comprising: a first base member; a laser unit provided on the first base member, wherein the laser unit is a surface emitting laser element array; a capacitive element that is provided on the first base member and supplies a driving electric current to the laser unit; a wiring board that is constituted by a second base member having lower thermal conductivity than the first base member and on which the first base member is mounted; and a driving unit that is mounted on the wiring board and drives the laser unit. ### Claim 2 (depends on 1) The light-emitting device according to claim 1, wherein a planar shape of the first base member has a lateral direction and a longitudinal direction; and the driving unit is mounted on a line extended from the lateral direction so that at least part thereof overlaps a range of a width in the longitudinal direction. ### Claim 3 (depends on 2) The light-emitting device according to claim 2, wherein the driving unit is mounted on the line extended from the lateral direction so that the whole driving unit is within the range of the width in the longitudinal direction. ### Claim 4 (depends on 2) The light-emitting device according to claim 2, wherein the laser unit and the capacitive element are aligned in the longitudinal direction. ### Claim 5 (depends on 3) The light-emitting device according to claim 3, wherein the laser unit and the capacitive element are aligned in the longitudinal direction. ### Claim 6 (depends on 1) The light-emitting device according to claim 1, wherein the laser unit is deviated toward the driving unit from a center of the first base member. ### Claim 7 (depends on 2) The light-emitting device according to claim 2, wherein the laser unit is deviated toward the driving unit from a center of the first base member. ### Claim 8 (depends on 3) The light-emitting device according to claim 3, wherein the laser unit is deviated toward the driving unit from a center of the first base member. ### Claim 9 (depends on 4) The light-emitting device according to claim 4, wherein the laser unit is deviated toward the driving unit from a center of the first base member. ### Claim 10 (depends on 5) The light-emitting device according to claim 5, wherein the laser unit is deviated toward the driving unit from a center of the first base member. ### Claim 11 (depends on 6) The light-emitting device according to claim 6, wherein the capacitive element is deviated toward the driving unit from the center of the first base member. ### Claim 12 (depends on 7) The light-emitting device according to claim 7, wherein the capacitive element is deviated toward the driving unit from the center of the first base member. ### Claim 13 (depends on 8) The light-emitting device according to claim 8, wherein the capacitive element is deviated toward the driving unit from the center of the first base member. ### Claim 14 (depends on 1) The light-emitting device according to claim 1, wherein the first base member is made of a ceramic material. ### Claim 15 (depends on 1) The light-emitting device according to claim 1, wherein the first base member is a semiconductor substrate; and the driving unit that drives the laser unit is provided in the semiconductor substrate. ### Claim 16 (depends on 1) The light-emitting device according to claim 1, further comprising an optical member that changes at least one of a direction and a spread angle of light emitted from the laser unit. ### Claim 17 (depends on 1) An optical device comprising: the light-emitting device according to claim 1; and a light receiving unit that receives light emitted from the laser unit of the light-emitting device and then reflected by an object to be measured, wherein the light receiving unit outputs a signal corresponding to a period from the emission of the light from the laser unit to the reception of the light by the light receiving unit. ### Claim 18 (depends on 17) A measurement device that measures a three-dimensional shape of an object to be measured, comprising: the optical device according to claim 17; and a three-dimensional shape specifying unit that specifies the three-dimensional shape of the object to be measured on a basis of light emitted from the laser unit of the optical device, reflected by the object to be measured, and then received by the light receiving unit of the optical device.