公开(公告)号：US11448529B2

公开(公告)日：2022-09-20

申请号：US17247141

申请日：2020-12-01

申请人： NATIONAL CHUNG-HSING UNIVERSITY

发明人： Hsi-Fu Shih

IPC分类号： G01D5/347 ,  G01D5/38

摘要： An optical rotary encoder includes a code disk, a laser source unit, a focusing unit and a photodetector array. The focusing unit converts the laser beam emitted by the laser source unit into incident laser beams that have a plurality of light points respectively on code tracks of the code disk, such that the code disk modulates the incident laser beams to form optical code signals. The photodetector array receives and converts the optical code signals into electric code signals.

公开(公告)号：US11175588B2

公开(公告)日：2021-11-16

申请号：US16139554

申请日：2018-09-24

申请人： NATIONAL CHUNG-HSING UNIVERSITY

发明人： Hsi-Fu Shih

IPC分类号： G03F7/20 ,  G03F7/00 ,  B33Y10/00 ,  B29C64/245 ,  B33Y30/00 ,  B29C64/241 ,  B29C64/135 ,  B29C64/268

摘要： An additive manufacturing apparatus is adapted to produce a solid object from a liquid resin and includes a vat, a lifting platform, an optical pickup head, and a planar scanning module mounted with the optical pickup head and operable to move the optical pickup head on a two-dimensional plane. The optical pickup head includes a focusing unit that has a first laser source for producing a laser beam, at least one first objective lens, and a first collimator lens disposed between the first laser source and the at least one first objective lens, such that the laser beam passes through the first collimator lens and the at least one first objective lens to strike and cure the liquid resin during movement of the lifting platform away from the vat.