公开(公告)号：US20230075451A1

公开(公告)日：2023-03-09

申请号：US18049699

申请日：2022-10-26

申请人： Carl Zeiss Vision International GmbH ,  OptoTech Optikmaschinen GmbH

发明人： Gerd Nowak ,  Wito Hartmann ,  Roland Mandler ,  Oswin Lack

IPC分类号： B24B13/005

摘要： A blocking piece for vacuum blocking a lens blank is disclosed. The blocking piece includes a blank contacting element formed of a rigid fluid-permeable material having an upper surface for contacting the lens blank. The blocking piece further includes a support element having an upper part tightly enclosing the blank contacting element on a peripheral surface of the blank contacting element and a lower part adapted to engage with a clamping device for clamping the blocking piece. The lens blank is fixed to the upper surface of the blank contacting element by applying a vacuum within the blocking piece to provide suction through essentially the entire upper surface of the blank contacting element. The disclosure further relates to a method for blocking a lens blank and a use of an element formed of a rigid fluid-permeable material as a part of a blocking piece.

公开(公告)号：US12059768B2

公开(公告)日：2024-08-13

申请号：US18049699

申请日：2022-10-26

申请人： Carl Zeiss Vision International GmbH ,  OptoTech Optikmaschinen GmbH

发明人： Gerd Nowak ,  Wito Hartmann ,  Roland Mandler ,  Oswin Lack

IPC分类号： B24B13/005

CPC分类号： B24B13/005 ,  B24B13/0052 ,  B24B13/0055

摘要： A blocking piece for vacuum blocking a lens blank is disclosed. The blocking piece includes a blank contacting element formed of a rigid fluid-permeable material having an upper surface for contacting the lens blank. The blocking piece further includes a support element having an upper part tightly enclosing the blank contacting element on a peripheral surface of the blank contacting element and a lower part adapted to engage with a clamping device for clamping the blocking piece. The lens blank is fixed to the upper surface of the blank contacting element by applying a vacuum within the blocking piece to provide suction through essentially the entire upper surface of the blank contacting element. The disclosure further relates to a method for blocking a lens blank and a use of an element formed of a rigid fluid-permeable material as a part of a blocking piece.