# US 9,518,725 B2 · Light source apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,725 B2 - Document ID: US9518725B2 - Status: Granted - Kind: B2 - Application number: 14/567,845 - Filed: 2014-12-11 - Published: 2015-05-28 - Granted: 2016-12-13 - Earliest claimed: 2011-12-28 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Takashi Sasamuro; Hidenori Matsuo - Web page: https://patentgrep.com/patent/US9518725B2 ## CPC - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21V 5/04: of lens shape - F21V 21/00: Supporting, suspending, or attaching arrangements for lighting devices (F21V17/00, F21V19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M11/00); Hand grips - F21V 29/74: with fins or blades - H01S 5/02: Structural details or components not essential to laser action - H01S 5/02253: using lenses - 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 5/4025: {Array arrangements, e.g. constituted by discrete laser diodes or laser bar (H01S5/42 takes precedence)} - F21Y 2115/30: Semiconductor lasers - G03B 21/2033: {LED or laser light sources} - 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 5/02212: Can-type, e.g. TO-CAN housings with emission along or parallel to symmetry axis - H01S 5/02257: using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing - H01S 5/32341: {blue laser based on GaN or GaP} - H01S 5/405: {Two-dimensional arrays} - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - 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 - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract A light source apparatus is provided which uses a plurality of semiconductor laser devices and which offers adequate heat dissipation. The light source apparatus using a plurality of semiconductor laser devices includes a holding member on which the plurality of semiconductor laser devices is arranged, wherein at least one semiconductor laser device among the plurality of semiconductor laser devices is arranged on the holding member such that a relative position of the semiconductor laser device in an optical axis direction with respect to an adjacent semiconductor laser device in a front view of the holding member is greater than a relative position of the semiconductor laser device in a direction perpendicular to the optical axis direction with respect to the adjacent semiconductor laser device. ## Claims ### Claim 1 A light source apparatus comprising: a plurality of semiconductor laser devices; and a holding member on which the plurality of semiconductor laser devices are disposed, wherein at least one semiconductor laser device among the plurality of semiconductor laser devices is disposed on the holding member such that a relative position of the semiconductor laser device in an optical axis direction with respect to an adjacent semiconductor laser device in a front view of the holding member is greater than a relative position of the semiconductor laser device in a direction perpendicular to the optical axis direction with respect to the adjacent semiconductor laser device, wherein depressions are located on a front face and a rear face of the holding member, respectively, and wherein each of the semiconductor laser devices is disposed in a respective one of the depressions. ### Claim 2 (depends on 1) The light source apparatus according to claim 1, wherein the semiconductor laser devices are collimator lens-integrated semiconductor laser devices. ### Claim 3 (depends on 1) The light source apparatus according to claim 1, wherein at least one of the depressions is formed such that an inner diameter thereof corresponds to an outer diameter of a semiconductor laser device disposed therein. ### Claim 4 (depends on 1) The light source apparatus according to claim 1, wherein at least one of the depressions is formed such that a depth thereof corresponds to a thickness of a semiconductor laser device disposed therein. ### Claim 5 (depends on 1) The light source apparatus according to claim 1, wherein a radiating member is attached to at least one of the front face and the rear face of the holding member. ### Claim 6 (depends on 5) The light source apparatus according to claim 5, wherein: at least one of the semiconductor laser devices has a stem, and the radiating member abuts the stem of said at least one semiconductor laser device. ### Claim 7 (depends on 6) The light source apparatus according to claim 6, wherein said at least one semiconductor laser device is held by the holding member due to the stem being pressed down by the radiating member. ### Claim 8 (depends on 5) The light source apparatus according to claim 5, wherein the radiating member has a plurality of fins. ### Claim 9 (depends on 8) The light source apparatus according to claim 8, wherein: a through hole is provided in the radiating member attached to the front face of the holding member, and light emitted from the semiconductor laser device passes through the through hole. ### Claim 10 (depends on 9) The light source apparatus according to claim 9, wherein radiating members are respectively attached to the front face and the rear face of the holding member. ### Claim 11 (depends on 9) The light source apparatus according to claim 9, wherein each semiconductor laser device comprises a semiconductor laser element that includes a nitride semiconductor.