公开(公告)号：EP2571474A2

公开(公告)日：2013-03-27

申请号：EP11731476.5

申请日：2011-05-19

申请人： The Secretary of State for Business, Innovation And Skills of Her Majesty's Britannic Government

发明人： Hall, Simon, Richard, Geoffrey ,  Stevens, Richard, Frederick

IPC分类号： A61H5/00 ,  G03H1/00 ,  G01B9/00 ,  G03B13/00 ,  A61B3/032

CPC分类号： A61B3/032 ,  A61B3/0091 ,  A61B3/08 ,  A61H5/00 ,  G01M11/0207 ,  G03H1/0005 ,  G03H1/0272 ,  G03H1/0402 ,  G03H1/041 ,  G03H1/16 ,  G03H1/22 ,  G03H1/2249 ,  G03H2001/0033 ,  G03H2001/0066 ,  G03H2001/0413 ,  G03H2001/221 ,  G03H2001/226

摘要： A substrate includes a diffracting structure providing a hologram which encodes one or more holographic images. Every image of the one or more holographic images has a holographic location at either a finite or substantially infinite effective optical distance. The hologram is to be used as an ophthalmic eye chart or an eye exercise device or to provide a scale for measuring distances.