(12) International Application Status Report

Received at International Bureau: 13 September 2018 (13.09.2018)

Information valid as of: 04 March 2019 (04.03.2019)

Report generated on: 19 September 2019 (19.09.2019)

(10) Publication number: (43) Publication date: (26) Publication language:
WO 2019/04352907 March 2019 (07.03.2019) English (EN)

(21) Application number: (22) Filing date: (25) Filing language:
PCT/IB2018/05638923 August 2018 (23.08.2018) English (EN)

(31) Priority number(s): (32) Priority date(s): (33) Priority status:
PCT/IB2017/055209 (IB)30 August 2017 (30.08.2017) Priority document received (in compliance with PCT Rule 17.1)

(51) International Patent Classification:
B33Y 50/00 (2015.01); B29C 64/386 (2017.01); B29C 64/10 (2017.01); H04N 1/40 (2006.01)

(71) Applicant(s):
ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL) [CH/CH]; EPFL-TTO EPFL Innovation Park J 1015 Lausanne (CH) (for all designated states)

(72) Inventor(s):
LOTERIE, Damien; Route du Bois 57 1024 Ecublens (CH)
DELROT, Paul; Chemin de la Dent d'Oche 6 1110 Morges (CH)
MOSER, Christophe; Ch. des Plaines 21 1007 Lausanne (CH)

(74) Agent(s):
MÜLLER, Christoph; c/o Hepp Wenger Ryffel AG Friedtalweg 5 9500 Wil (CH)

(54) Title (EN): METHODS AND APPARATUS FOR THREE-DIMENSIONAL FABRICATION BY TOMOGRAPHIC BACK PROJECTIONS
(54) Title (FR): PROCÉDÉS ET APPAREIL DE FABRICATION EN TROIS DIMENSIONS PAR DES RÉTROPROJECTIONS TOMOGRAPHIQUES

(57) Abstract:
(EN): A method for producing a three-dimensional object comprising computing a sequence of back-projections describing the three-dimensional object to be formed from different orientation angles of said object, defining a sequence of patterns of light using said back-projections, and irradiating with each of said patterns of light at the respective corresponding orientation angle and according to the defined sequence a photoresponsive material that is capable of alteration of its material phase upon irradiation by light, thereby creating a three-dimensional distribution of alterations within the photoresponsive medium which physically reproduces said three- dimensional object, thereby creating the three-dimensional object.
(FR): La présente invention concerne un procédé de production d'un objet tridimensionnel comprenant les étapes consistant à calculer une séquence de rétroprojections décrivant l'objet tridimensionnel à former à partir de différents angles d'orientation dudit objet, définir une séquence de motifs de lumière à l'aide desdites rétroprojections, et irradier avec chacun desdits motifs de lumière à l'angle d'orientation correspondant respectif et selon la séquence définie d'un matériau photosensible qui est apte à modifier sa phase de matériau lors de l'irradiation par la lumière, ce qui permet de créer une répartition tridimensionnelle d'altérations à l'intérieur du support photosensible qui reproduit physiquement ledit objet tridimensionnel, ce qui permet de créer l'objet tridimensionnel.

International search report:
Received at International Bureau: 14 December 2018 (14.12.2018) [EP]

International Report on Patentability (IPRP) Chapter II of the PCT:
Not available

(81) Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
European Patent Office (EPO) : AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR
African Intellectual Property Organization (OAPI) : BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG
African Regional Intellectual Property Organization (ARIPO) : BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW
Eurasian Patent Organization (EAPO) : AM, AZ, BY, KG, KZ, RU, TJ, TM