# US 11,307,377 B2 · Light source device, projector and lighting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,377 B2 - Document ID: US11307377B2 - Status: Granted - Kind: B2 - Application number: 17/269,765 - Filed: 2019-07-10 - Published: 2021-09-30 - Granted: 2022-04-19 - Earliest claimed: 2018-08-22 - Assignees: Maxell, Ltd. - Applicants: Maxell, Ltd. - Inventors: Masatoshi Arai; Kazuo Shikita - Web page: https://patentgrep.com/patent/US11307377B2 ## CPC - G02B 7/04: with mechanism for focusing or varying magnification - F21V 9/32: characterised by the arrangement of the photoluminescent material - F21V 14/06: by movement of refractors {(in vehicle head lamps F21S41/635)} - G02B 19/0014: {at least one surface having optical power} - G03B 21/204: {using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197)} - G03B 21/2066: {Reflectors in illumination beam (in projection beam G03B21/28)} - G03B 21/208: {Homogenising, shaping of the illumination light} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - 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 device includes an excitation-light light source which emits excitation light, a reflection member which reflects the excitation light, a lens which is arranged on an optical path of the excitation light which leads from the excitation-light light source to the reflection member and refracts the excitation light, a housing which houses the reflection member in a hermetically sealed internal space, an operation member which is exposed from the housing in a direction which intersects the optical path and is moved towards the inside and outside of the housing, and an adjustment mechanism which adjusts a length of an optical path between the reflection member and the lens in linkage with the operation member which is moved towards the inside and outside of the housing. ## Claims ### Claim 1 A light source device comprising: an excitation-light light source which emits excitation light; a reflection member which reflects the excitation light; a lens which is arranged on an optical path of the excitation light which leads from the excitation-light light source to the reflection member and refracts the excitation light; a housing which houses the reflection member in a hermetically sealed internal space; an operation member which is exposed from the housing in a direction which intersects the optical path and is moved towards the inside and outside of the housing; and an adjustment mechanism which adjusts a length of an optical path between the reflection member and the lens in linkage with the operation member which is moved towards the inside and outside of the housing. ### Claim 2 (depends on 1) The light source device according to claim 1, wherein the adjustment mechanism moves the lens along the optical path. ### Claim 3 (depends on 2) The light source device according to claim 2, wherein the housing is configured by a first housing and a second housing between which the internal space is formed by bringing peripheral edges thereof into close contact with each other, and the lens, the operation member, and the adjustment mechanism are supported to the first housing. ### Claim 4 (depends on 3) The light source device according to claim 3, wherein a bolt hole which passes through in a direction which intersects the optical path is formed in the first housing, the operation member is a bolt which is screwed into the bolt hole, and the adjustment mechanism moves the lens along the optical path in linkage with the bolt which is moved towards the inside and outside of the first housing. ### Claim 5 (depends on 4) The light source device according to claim 4, wherein the adjustment mechanism includes a rotation member which is supported to the first housing in a state of being rotatable around an axis line which extends in a direction of the optical path in linkage with the bolt which is moved towards the inside and outside of the first housing, and a first energization member which is arranged on the opposite side of the rotation member with the lens being sandwiched therebetween and energizes the lens and the rotation member in the direction of the optical path, wherein one of a protruded portion and a recessed portion which accepts the protruded portion is formed on a wall face of the rotation member which is in contact with the first housing, and the other of the protruded portion and the recessed portion is formed on a wall face of the first housing which is in contact with the rotation member, and wherein the rotation member rotates and the protruded portion runs on a peripheral edge of the recessed portion, and thereby the adjustment mechanism moves the lens in a direction which is opposite to the direction that the lens is energized by the first energization member. ### Claim 6 (depends on 5) The light source device according to claim 5, wherein the adjustment mechanism further includes a transmission member which is supported to the first housing to be rotatable around the axis line extending in the direction of the optical path, is composed of contact with both of the bolt and the rotation member so as to convert a linear motion of the bolt to a rotational motion, and transmits the rotational motion to the rotation member. ### Claim 7 (depends on 6) The light source device according to claim 6, wherein the adjustment mechanism further includes a second energization member which energizes the rotation member in a direction that the rotation member is pressed against the transmission member. ### Claim 8 (depends on 6) The light source device according to claim 6, wherein the bolt includes a first bolt and a second bolt, and the transmission member includes a first transmission member which converts the linear motion of the first bolt to the rotational motion and thereby rotates the rotation member clockwise or counterclockwise, and a second transmission member which converts the linear motion of the second bolt to the rotational motion and thereby rotates the rotation member in a direction which is opposite to a rotation direction that the rotation member is rotated by the first transmission member. ### Claim 9 (depends on 7) The light source device according to claim 7, wherein the bolt includes a first bolt and a second bolt, and the transmission member includes a first transmission member which converts the linear motion of the first bolt to the rotational motion and thereby rotates the rotation member clockwise or counterclockwise, and a second transmission member which converts the linear motion of the second bolt to the rotational motion and thereby rotates the rotation member in a direction which is opposite to a rotation direction that the rotation member is rotated by the first transmission member. ### Claim 10 (depends on 1) The light source device according to claim 1, further comprising a fixing member which fixes the operation member after adjustment of optical path length by the adjustment mechanism. ### Claim 11 (depends on 1) The light source device according to claim 1, wherein the reflection member is a wavelength conversion member which includes a phosphor layer which converts the excitation light to fluorescent light and reflects the fluorescent light. ### Claim 12 (depends on 1) The light source device according to claim 1, wherein the reflection member is a diffusion plate which diffuses and reflects the excitation light. ### Claim 13 (depends on 1) The light source device according to claim 1, wherein the lens is the closest to the reflection member among a plurality of lenses which are arranged on the optical path which leads from the excitation-light light source to the reflection member. ### Claim 14 (depends on 1) A projector, comprising the light source device according to claim 1. ### Claim 15 (depends on 1) A lighting device, comprising the light source device according to claim 1.