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OPHTHALMIC LENS AND METHOD FOR DESIGNING OPHTHALMIC LENS
专利权人:
LTD.;KOWA COMPANY
发明人:
ISHIKAWA, HARUO
申请号:
SG11201607593V
公开号:
SG11201607593VA
申请日:
2015.01.28
申请国别(地区):
SG
年份:
2016
代理人:
摘要:
It is provided with an ophthalmic lens having a cross-sectional shape in an arbitrary meridian direction on a lens surface of the ophthalmic lens. The cross-sectional shape is expressed by the following Z = cr 2 1 + 1 ˆ’ c 2 r 2 k + 1 ½ + A ¸ r 2 + B ¸ r 4 (1) wherein c is a paraxial curvature of the ophthalmic lens, r is a distance from a lens center of the ophthalmic lens, k is a conic constant of a surface which is in rotation symmetry with respect to an optical axis of the lens in the ophthalmic lens, c, r and k are used in common in the meridian direction on the lens surface, and A(¸) and B(¸) are parameters expressed by functions depending on an angle in the meridian direction.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/
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