| 发明名称 |
LENTILA CU PUTERE FOCALA VARIABILA |
| 摘要 |
<p>Ophthalmic lens having an aspheric surface of which the section taken through a substantially vertical plane is an umbilical curve along which the focal power of the lens varies progressively. At each point Bij of the aspheric surface the section of this surface through a substantially vertical plane pi j parallel to the plane pi of the umbilical curve MM1 is a curve SIGMA j the curvature CB+346 +347 of which at said point Bij complies with the relationship: ¦CB+346 +347 - CA+346 ¦</=N Wherein CA+346 is the curvature of said umbilical curve MM1 at a point Ai of said umbilical curve which lies on a same horizontal section Si as said point Bij, the lens being in its position of use, N being a number having a predetermined value complying with the relationship N </= 3.</p> |
| 申请公布号 |
RO72099(A) |
申请公布日期 |
1981.06.26 |
| 申请号 |
RO19730075583 |
申请日期 |
1973.07.25 |
| 申请人 |
ESSILOR INTERNATIONAL SOCIETE ANONYME,FR |
发明人 |
MAITENAZ,BERNARD,FR |
| 分类号 |
G02C7/06;G02B3/02;G02B3/10;G02C7/02;(IPC1-7):02B3/00 |
主分类号 |
G02C7/06 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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