# US 10,481,349 B2 · Optical path conversion device, optical interface apparatus, and optical transmission system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,481,349 B2 - Document ID: US10481349B2 - Status: Granted - Kind: B2 - Application number: 15/764,418 - Filed: 2016-08-18 - Published: 2018-10-04 - Granted: 2019-11-19 - Earliest claimed: 2015-10-20 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Yusuke Oyama - Web page: https://patentgrep.com/patent/US10481349B2 ## CPC - G02B 6/4214: {the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device (G02B6/4246 takes precedence)} - G02B 6/4206: {Optical features (G02B6/4207, G02B6/421 take precedence)} - G02B 6/425: {Optical features (semiconductor laser arrays H01S5/40; hybrid LED arrays H10W90/00)} - G02B 6/426: {mounting, engaging or coupling of the package to a board, a frame or a panel} - H01S 5/02253: using lenses - H01S 5/02255: using beam deflecting elements - H01S 5/0239: Combinations of electrical or optical elements - H01S 5/40: Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30 (H01S5/50 takes precedence) - H01S 5/4025: {Array arrangements, e.g. constituted by discrete laser diodes or laser bar (H01S5/42 takes precedence)} - H10F 77/40: Optical elements or arrangements (surface textures H10F77/70) - G02B 6/4246: {Bidirectionally operating package structures} - H01S 5/02251: using optical fibres - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION ## Abstract An optical path conversion device according to an embodiment of the present technology is disposed between a plurality of optical devices that are arranged in one line or in a zigzag manner and a plurality of optical fibers that are arranged in one line or in a zigzag manner with an arrangement pitch different from an arrangement pitch of the plurality of optical devices. The optical path conversion device includes a light refractive surface for pitch conversion. ## Claims ### Claim 1 An optical interface apparatus, comprising: a plurality of optical devices in one of a line pattern or a zigzag pattern; an optical path conversion device that includes a first light refractive surface inclined to an arrangement direction of the plurality of optical devices; and a housing that includes an insertion port into which a front end of an optical fiber array is inserted, wherein the plurality of optical devices and the optical path conversion device are included in the housing, and the first light refractive surface obliquely faces the insertion port. ### Claim 2 (depends on 1) The optical interface apparatus according to claim 1, wherein a first angle between a line segment parallel to an optical axis of the insertion port and the first light refractive surface is smaller than 45 degrees. ### Claim 3 (depends on 2) The optical interface apparatus according to claim 2, wherein the first light refractive surface is in contact with air. ### Claim 4 (depends on 2) The optical interface apparatus according to claim 2, wherein the optical path conversion device further includes: a first optical block that includes the first light refractive surface on a surface, and a second optical block that is fixed in contact with the first light refractive surface. ### Claim 5 (depends on 2) The optical interface apparatus according to claim 2, wherein the optical path conversion device further includes a light reflective surface in an optical path between the first light refractive surface and the plurality of optical devices. ### Claim 6 (depends on 5) The optical interface apparatus according to claim 5, wherein a second angle between the line segment parallel to the optical axis of the insertion port and the light reflective surface is smaller than 45 degrees. ### Claim 7 (depends on 5) The optical interface apparatus according to claim 5, wherein the optical path conversion device further includes a plurality of convex shapes, and wherein each of the plurality of convex shapes is on one of the light reflective surface or a surface that faces a respective optical device of the plurality of optical devices of the optical path conversion device. ### Claim 8 (depends on 5) The optical interface apparatus according to claim 5, wherein the optical path conversion device further includes a flat surface on the light reflective surface and on a surface that faces the plurality of optical devices of the optical path conversion device, the optical interface apparatus further includes a plurality of convex lenses, and each of the plurality of convex lenses is between a respective optical device of the plurality of optical devices and the surface that faces the respective optical device of the optical path conversion device. ### Claim 9 (depends on 5) The optical interface apparatus according to claim 5, wherein the first light refractive surface includes a plurality of first flat surfaces, the light reflective surface includes a plurality of second flat surfaces, the plurality of first flat surfaces are arranged such that the first light refractive surface is in a recessed shape, and the plurality of second flat surfaces are arranged such that the light reflective surface is in the recessed shape. ### Claim 10 (depends on 5) The optical interface apparatus according to claim 5, wherein the optical path conversion device further includes a flat surface on the light reflective surface and on a surface that faces the plurality of optical devices of the optical path conversion device, the optical interface apparatus further includes a plurality of eccentric lenses, and each of the plurality of eccentric lenses is between a respective optical device of the plurality of optical devices and the surface that faces the respective optical device of the optical path conversion device. ### Claim 11 (depends on 5) The optical interface apparatus according to claim 5, wherein the optical path conversion device further includes a flat surface on the light reflective surface and on a surface that faces the plurality of optical devices of the optical path conversion device, and the optical interface apparatus further includes: a plurality of convex lenses, each of the plurality of convex lenses is between a respective optical device of the plurality of optical devices and the surface that faces the respective optical device of the optical path conversion device, and a second light refractive surface that obliquely intersects with optical axes of the respective optical device, between a respective convex lens of the plurality of convex lenses and the surface that faces the respective optical device of the optical path conversion device. ### Claim 12 (depends on 5) The optical interface apparatus according to claim 5, wherein the optical path conversion device further includes a flat surface on the light reflective surface and on a surface that faces the plurality of optical devices of the optical path conversion device, the optical interface apparatus further includes a plurality of convex lenses, and each of the plurality of convex lenses includes an optical axis that obliquely intersects with an optical axis of a corresponding one of the plurality of optical devices, between a respective optical device of the plurality of optical devices and the surface that faces the respective optical device of the optical path conversion device. ### Claim 13 (depends on 2) The optical interface apparatus according to claim 2, wherein the first light refractive surface is directly above a respective optical device of the plurality of optical devices. ### Claim 14 (depends on 2) The optical interface apparatus according to claim 2, wherein a surface, that faces a respective optical device of the plurality of optical devices of the optical path conversion device, obliquely intersects with optical axes of the respective optical device. ### Claim 15 (depends on 14) The optical interface apparatus according to claim 14, wherein the surface, that faces the respective optical device of the optical path conversion device, obliquely intersects with the optical axes of the respective optical device at a second angle that is one of equal to or larger than 2 degrees. ### Claim 16 (depends on 2) The optical interface apparatus according to claim 2, wherein the optical path conversion device further includes, at a first position that faces the insertion port, a positioning part that defines a second position of the front end of the optical fiber array. ### Claim 17 An optical transmission system, comprising: a plurality of optical devices in one of a line pattern or a zigzag pattern; an optical path conversion device that includes a first light refractive surface inclined to an arrangement direction of the plurality of optical devices; an optical fiber array that includes a plurality of optical fibers in one of the line pattern or the zigzag pattern in a direction corresponding to the arrangement direction of the plurality of optical devices; and a housing that includes an insertion port into which a front end of the optical fiber array is inserted, wherein the plurality of optical devices and the optical path conversion device are included in the housing, and the first light refractive surface obliquely faces the insertion port. ### Claim 18 (depends on 17) The optical transmission system according to claim 17, wherein an arrangement pitch of the plurality of optical fibers in one of the line pattern or the zigzag pattern is smaller than an arrangement pitch of the plurality of optical devices, and an angle between a line segment parallel to an optical axis of the insertion port and the first light refractive surface is smaller than 45 degrees. ### Claim 19 An optical path conversion device, comprising: a light refractive surface for pitch conversion, wherein the optical path conversion device is between a plurality of optical devices in one of a line pattern or a zigzag pattern, and a plurality of optical fibers in one of the line pattern or the zigzag pattern, an arrangement pitch of the plurality of optical fibers is different from an arrangement pitch of the plurality of optical devices, the light refractive surface obliquely faces an insertion port, and a front end of each of the plurality of optical fibers is inserted into the insertion port. ### Claim 20 (depends on 19) The optical path conversion device according to claim 19, wherein the optical path conversion device is a block-shaped optical device, the light refractive surface is on a surface of the block-shaped optical device, and the block-shaped optical device includes a light reflective surface at a position, of the block-shaped optical device, that is opposite to a position of the light refractive surface.