发明授权
- 专利标题: Ophthalmic lens having a progressive effect
- 专利标题(中): 具有渐进效果的眼科镜片
-
申请号: US448500申请日: 1995-06-05
-
公开(公告)号: US5992998A公开(公告)日: 1999-11-30
- 发明人: Herbert Pfeiffer , Helmut Altheimer , Walter Haimerl
- 申请人: Herbert Pfeiffer , Helmut Altheimer , Walter Haimerl
- 申请人地址: DEX Munich
- 专利权人: Optische Werke G. Rodenstock
- 当前专利权人: Optische Werke G. Rodenstock
- 当前专利权人地址: DEX Munich
- 优先权: DEX4337369 19931102
- 主分类号: G02C7/06
- IPC分类号: G02C7/06 ; G02C7/02
摘要:
Disclosed is an ophthalmic lens having a progressive optic power, this lens being provided with at least one surface having a surface power which changes in such a manner that, starting from at least one region, in which the optic power of the ophthalmic lens is practically constant, the optic power of the ophthalmic lens changes along at least one line (hereinafter referred to as the main line) which may lie in a plane or be sinuous and on which there is a prescribed astigmatism which is not identical with zero diopter. The surface astigmatism on the main line not only being a specific amount but also having a usually not constant axial position along the main line in such a manner that the resulting overall astigmatism of the bundle, allowing for oblique astigmatism, being practically constant along the main line after the surface of the lens facing the eye or being variable with regard to both said amount and said axial position according to physiological requirements.
公开/授权文献
- US4950908A Flocculant control system 公开/授权日:1990-08-21
信息查询