| 发明名称 |
MULTIFOCAL DIFFRACTIVE OPHTHALMIC LENSES |
| 摘要 |
A lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second diffractive order. SWBAPPl(43254FOR.ABS)
|
| 申请公布号 |
CA2048013(A1) |
申请公布日期 |
1992.02.09 |
| 申请号 |
CA19912048013 |
申请日期 |
1991.07.26 |
| 申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
FUTHEY, JOHN A.;SIMPSON, MICHAEL J. |
| 分类号 |
A61F2/16;G02B5/18;G02C7/04;G02C7/06;(IPC1-7):G02C7/06;G02B3/10;A61F2/14 |
主分类号 |
A61F2/16 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
