# US 8,540,501 B2 · Three-dimensional stereolithography apparatus, three-dimensional stereolithography method, and three-dimensional object > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,501 B2 - Document ID: US8540501B2 - Status: Granted - Kind: B2 - Application number: 12/913,928 - Filed: 2010-10-28 - Published: 2011-05-05 - Granted: 2013-09-24 - Earliest claimed: 2009-11-05 - Assignees: Sony Corporation - Applicants: Hiroyuki Yasukochi - Inventors: Hiroyuki Yasukochi - Web page: https://patentgrep.com/patent/US8540501B2 ## CPC - B29C 64/135: the energy source being concentrated, e.g. scanning lasers or focused light sources - B33Y 10/00: Processes of additive manufacturing - B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor - B33Y 40/00: Auxiliary operations or equipment, e.g. for material handling - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING ## Abstract A three-dimensional stereolithography apparatus includes a stage, a support mechanism to support a film so that the film is opposed to the stage, a pressing mechanism, a supply mechanism, an irradiation unit, a movement mechanism, and a control mechanism. The pressing mechanism presses at least a linear area of the film so that the linear area closest to the stage is formed in the film. The supply mechanism supplies a light-curing material into a slit area formed between the stage and the linear area. The irradiation unit irradiates the light-curing material supplied into the slit area with laser light through the pressing mechanism and the film. The movement mechanism moves the stage and the pressing mechanism relatively to the film, to form one cured layer of the light-curing material. The control mechanism controls a distance between the stage and the linear area of the film, to stack the cured layer. ## Claims ### Claim 1 A three-dimensional stereolithography apparatus, comprising: a stage; a film; a support mechanism operable to support the film so that the film is opposed to the stage; a pressing mechanism having a lens disposed at least partially in the pressing mechanism, the pressing mechanism operable to press at least a linear area of the film supported by the support mechanism so that the linear area that is opposed to and closest to the stage is formed in the film, the linear area being formed in a first direction; a supply mechanism operable to supply a light-curing material into a slit area formed between the stage and the linear area of the film; an irradiation unit operable irradiate the light-curing material supplied into the slit area by the supply mechanism with laser light through the pressing mechanism and the film; a movement mechanism operable (i) to move the stage and the pressing mechanism relatively to the film in a second direction, and (ii) to form one cured layer of the light-curing material, the second direction being different from the first direction; and a control mechanism operable (i) to control a distance between the stage and the linear area of the film, and (ii) to stack the cured layer of the light-curing material. ### Claim 2 (depends on 1) The three-dimensional stereolithography apparatus according to claim 1, wherein the pressing mechanism is configured to press the film so that a curved area including the linear area is formed in the film. ### Claim 3 (depends on 2) The three-dimensional stereolithography apparatus according to claim 2, wherein the lens has a curved surface corresponding to a shape of the curved area. ### Claim 4 (depends on 3) The three-dimensional stereolithography apparatus according to claim 3, wherein the lens is a rod lens. ### Claim 5 (depends on 4) The three-dimensional stereolithography apparatus according to claim 4, wherein the rod lens is provided rotatably about an axis extended in the first direction. ### Claim 6 (depends on 4) The three-dimensional stereolithography apparatus according to claim 4, further comprising: a correction lens to correct a shape of a beam spot of the laser light with which the light-curing material is irradiated. ### Claim 7 (depends on 3) The three-dimensional stereolithography apparatus according to claim 3, wherein the lens is a cylindrical lens having a cylindrical surface as the curved surface. ### Claim 8 (depends on 1) The three-dimensional stereolithography apparatus according to claim 1, wherein the pressing mechanism presses the film so that a flat area including the linear area and a curved area provided in continuous with the flat area are formed on the film. ### Claim 9 (depends on 8) The three-dimensional stereolithography apparatus according to claim 8, wherein the pressing mechanism includes an optical path of the laser light, a slit having an opening surface corresponding to a shape of the flat area, the optical path being formed in the slit, and a curved surface that is provided in continuous with the opening surface, and corresponds to a shape of the curved area. ### Claim 10 (depends on 9) The three-dimensional stereolithography apparatus according to claim 9, wherein the pressing mechanism further includes a flow path that introduces a gas into a gap between the film and the opening surface and curved surface. ### Claim 11 (depends on 9) The three-dimensional stereolithography apparatus according to claim 9, further comprising: a pressure control mechanism to control a pressure in the slit. ### Claim 12 (depends on 1) The three-dimensional stereolithography apparatus according to claim 1, further comprising: a scanning mechanism to perform relative scanning with respect to the pressing mechanism and the stage with the laser light in the first direction. ### Claim 13 (depends on 1) The three-dimensional stereolithography apparatus according to claim 1, wherein the movement mechanism integrally moves the stage and the film relatively to the pressing mechanism. ### Claim 14 A three-dimensional stereolithography apparatus, comprising: a stage; a film; a support mechanism operable to support the film so that the film is opposed to the stage; a pressing mechanism operable to press at least a linear area of the film supported by the support mechanism so that the linear area that is opposed to and closest to the stage is formed in the film, the linear area being formed in a first direction; a supply mechanism operable to supply a light-curing material into a slit area formed between the stage and the linear area of the film; an irradiation unit operable to irradiate the light-curing material supplied into the slit area by the supply mechanism with laser light through the pressing mechanism and the film; a movement mechanism operable (i) to move the stage and the pressing mechanism relatively to the film in a second direction, and (ii) to form one cured layer of the light-curing material, the second direction being different from the first direction; and a control mechanism operable (i) to control a distance between the stage and the linear area of the film, and (ii) to stack the cured layer of the light-curing material, wherein, the pressing mechanism is configured to press the film so that a curved area including the linear area is formed in the film, the pressing mechanism includes a light-transmissive member having a curved surface corresponding to a shape of the curved area, the pressing mechanism includes a support member operable to support the light-transmissive member, and the support member includes (i) a curved surface continuous with the curved surface of the light-transmissive member to form the curved area of the film, and (ii) flow path operable to introduce a gas into a gap between the film and the curved surfaces of the light-transmissive member and the support member.