公开(公告)号：AT482790T

公开(公告)日：2010-10-15

申请号：AT05847559

申请日：2005-12-21

Applicant: ESSILOR INT

Inventor： SILVA MARC ,  RIALL JAMES ,  PADIOU JEAN-MARC ,  QUERE LOIC

IPC: B24B13/01

Abstract: A polishing wheel (10) arranged to polish an article. The polishing wheel comprises a hub (12) provided with an axial cavity (18) coaxial with an axis (26). The polishing wheel further comprises a substrate layer (14) being made of an elastomer material affixed to the hub (12) and coaxial with the axis (26). The substrate layer (14) has an outer surface (20) having a substantially symmetrical shape with respect to the axis (26). The polishing wheel (10) further comprises a continuous cover layer (16) affixed to the outer surface (20) and coaxial with the axis (26). The continuous cover layer (16) is made of an elastomer material covering substantially entirely the outer surface (20).

公开(公告)号：AT449656T

公开(公告)日：2009-12-15

申请号：AT05782713

申请日：2005-08-03

Applicant: ESSILOR INT

Inventor： RIALL JAMES ,  DANNHARDT WALTER ,  MANDLER ROLAND ,  MULLER TOBIAS

IPC: B23C3/16 ,  B23Q15/00 ,  B24B13/06 ,  G05B19/18

Abstract: A raster cutting apparatus and method for producing accurately formed, aspheric ophthalmic lenses having a good quality surface finish. The accurate form and good surface finish are obtained by using a substantially spherically shaped cutting tool having a large radius. The methods include utilizing a cutting path which provides substantially constant cutting-force, such as a constant surface-cutting-speed raster pattern.