公开(公告)号：US20210004507A1

公开(公告)日：2021-01-07

申请号：US16976669

申请日：2018-03-08

Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Noriko YAMAZAKI ,  Noriko WATARI ,  Yuzuru OGURA ,  Toshiya WATANABE

IPC: G06F30/10 ,  B33Y50/00 ,  G01N15/02

Abstract: A powder material as the raw material of a three-dimensional laminated and shaped object is accurately evaluated. This invention provides an evaluation apparatus of a powder material as a raw material of a three-dimensional laminated and shaped object, including a calculator that calculates, using powder constitution data concerning particles constituting the powder material, a volume of a closed space formed by the plurality of particles in the powder material, and an evaluator that evaluates the powder material by comparing the volume of the closed space calculated by the calculator with a predetermined threshold.

公开(公告)号：US20170038596A1

公开(公告)日：2017-02-09

申请号：US14763151

申请日：2015-03-10

Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Saneyuki GOYA ,  Toshiya WATANABE ,  Minoru DANNO ,  Yoshihito FUJITA ,  Haruhiko NIITANI

IPC: G02B27/14 ,  G01J1/04 ,  G02B17/00

CPC classification number: G02B27/144 ,  B23K26/032 ,  B23K26/042 ,  B23K26/046 ,  B23K26/0643 ,  B23K26/36 ,  G01J1/0418 ,  G02B5/205 ,  G02B27/108

Abstract: This invention is directed to attenuating a beam output without changing the beam position and the beam diameter. A high-output optical attenuator includes a first reflector that totally reflects incident light and causes first reflected light serving as reflected light of the incident light to enter a second reflecting portion, a second reflector that reflects the first reflected light and causes second reflected light serving as reflected light of the first reflected light to enter a third reflecting portion, a third reflector that reflects the second reflected light and causes third reflected light serving as reflected light of the second reflected light to enter a fourth reflecting portion, and a fourth reflector that reflects the third reflected light as fourth reflected light having the same optical axis as the optical axis of the incident light. At least two of the second reflector, the third reflector, and the fourth reflector are half mirrors.

Abstract translation: 本发明涉及在不改变光束位置和光束直径的情况下衰减光束输出。 高输出光衰减器包括：全反射入射光的第一反射器，并且使作为入射光的反射光的第一反射光进入第二反射部;反射第一反射光的第二反射体， 作为第一反射光的入射到第三反射部的反射光，反射第二反射光并使第三反射光作为第二反射光的反射光的第三反射光入射到第四反射部的第三反射器，以及第四反射器， 将第三反射光反射为具有与入射光的光轴相同的光轴的第四反射光。 第二反射器，第三反射器和第四反射器中的至少两个是半反射镜。