# US 2019/0377249 A1 · Lens adjustment mechanism and projection-type display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0377249 A1 - Document ID: US20190377249A1 - Status: Published application - Kind: A1 - Application number: 16/480,347 - Filed: 2018-01-11 - Published: 2019-12-12 - Earliest claimed: 2017-02-08 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Akihiro MIYAZAKI - Web page: https://patentgrep.com/patent/US20190377249A1 ## CPC - G03B 21/142: {Adjusting of projection optics} - G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)} - G02B 7/023: {permitting adjustment} - G03B 5/02: Lateral adjustment of lens - G03B 5/06: Swinging lens about normal to the optical axis - G03B 21/145: {Housing details, e.g. position adjustments thereof} - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A lens adjustment mechanism according to an embodiment of the present disclosure includes: a base section; a lens holding section that holds a lens having an optical axis in a Z-axis direction; an intermediate member disposed between the base section and the lens holding section; a first rotating cam that is disposed between the base section and the intermediate member, and is rotated about an optical axis of the lens, thereby causing the lens holding section to move in a Y-axis direction; and a second rotating cam that is disposed between the intermediate member and the lens holding section, and is rotated about the optical axis of the lens, thereby causing the lens holding section to move in an X-axis direction. The intermediate member moves in the Y-axis direction together with the lens holding section during rotation of the first rotating cam, and restricts movement in the Y-axis direction of the lens holding section during rotation of the second rotating cam. ## Claims ### Claim 1 A lens adjustment mechanism comprising: a base section; a lens holding section that holds a lens having an optical axis in a Z-axis direction; an intermediate member disposed between the base section and the lens holding section; a first rotating cam that is disposed between the base section and the intermediate member, and is rotated about an optical axis of the lens, thereby causing the lens holding section to move in a Y-axis direction; and a second rotating cam that is disposed between the intermediate member and the lens holding section, and is rotated about the optical axis of the lens, thereby causing the lens holding section to move in an X-axis direction, wherein the intermediate member moves in the Y-axis direction together with the lens holding section during rotation of the first rotating cam, and restricts movement in the Y-axis direction of the lens holding section during rotation of the second rotating cam. ### Claim 2 (depends on 1) The lens adjustment mechanism according to claim 1, wherein the lens holding section includes a cylindrical portion having a cylindrical surface in an optical axis direction of the lens, the base section, the intermediate member, the first rotating cam, and the second rotating cam each have an opening into which the cylindrical portion is inserted, and the base section, the intermediate member, the first rotating cam, the second rotating cam, and the lens holding section are coupled to one another. ### Claim 3 (depends on 1) The lens adjustment mechanism according to claim 1, wherein the first rotating cam and the second rotating cam rotate in a plane direction perpendicular to the optical axis of the lens. ### Claim 4 (depends on 1) The lens adjustment mechanism according to claim 1, wherein the intermediate member has a degree of freedom in the X-axis direction and the Y-axis direction. ### Claim 5 (depends on 1) The lens adjustment mechanism according to claim 1, wherein the first rotating cam has a plurality of first rotation grooves along a circumferential direction and a pair of first cam grooves inclined with respect to the circumferential direction. ### Claim 6 (depends on 5) The lens adjustment mechanism according to claim 5, wherein the first cam groove guides movement in the Y-axis direction of the intermediate member. ### Claim 7 (depends on 6) The lens adjustment mechanism according to claim 6, wherein the intermediate member has a first groove having a long axis in the Y-axis direction and a first pin penetrating the first cam groove. ### Claim 8 (depends on 7) The lens adjustment mechanism according to claim 7, wherein the base section has a second pin penetrating the first rotation groove of the first rotating cam, and a third pin penetrating the first groove of the intermediate member and restricting movement in the X-axis direction of the intermediate member. ### Claim 9 (depends on 1) The lens adjustment mechanism according to claim 1, wherein the second rotating cam has a plurality of second rotation grooves along a circumferential direction and a pair of second cam grooves inclined with respect to the circumferential direction. ### Claim 10 (depends on 9) The lens adjustment mechanism according to claim 9, wherein the second cam groove guides movement in the X-axis direction of the lens holding section. ### Claim 11 (depends on 10) The lens adjustment mechanism according to claim 10, wherein the intermediate member has a second groove having a long axis in the X-axis direction and a fourth pin penetrating the second cam groove. ### Claim 12 (depends on 11) The lens adjustment mechanism according to claim 11, wherein the lens holding section has a fifth pin penetrating the second rotation groove of the second rotating cam, and a sixth pin penetrating the second groove of the intermediate member and restricting movement in the Y-axis direction of the intermediate member. ### Claim 13 (depends on 1) The lens adjustment mechanism according to claim 1, further comprising a third rotating cam that includes a cylindrical portion having a cylindrical surface in an optical axis direction of the lens, and moves the lens holding section in the Z-axis direction. ### Claim 14 A projection-type display apparatus comprising: a light source section; an image generator that includes a plurality of optical units each including a light modulation element that modulates light from the light source section on a basis of an inputted image signal; and a projection section that projects image light generated in the image generator, the optical units each including: a base section, a lens holding section that holds a lens having an optical axis in a Z-axis direction, an intermediate member disposed between the base section and the lens holding section, a first rotating cam that is disposed between the base section and the intermediate member, and is rotated about an optical axis of the lens, thereby causing the lens holding section to move in a Y-axis direction, and a second rotating cam that is disposed between the intermediate member and the lens holding section, and is rotated about the optical axis of the lens, thereby causing the lens holding section to move in an X-axis direction, wherein the intermediate member moves in the Y-axis direction together with the lens holding section during rotation of the first rotating cam, and restricts movement in the Y-axis direction of the lens holding section during rotation of the second rotating cam.