发明名称 |
Optical lens system for image taking |
摘要 |
An optical lens system for image taking includes, in order from an object side to an image side, a first lens element with negative refractive power having a concave object-side surface and a concave image-side surface, a second lens element with positive refractive power having a convex image-side surface, and a third lens element with negative refractive power having a concave image-side surface of the third lens element near an optical axis and a convex image-side surface of the third lens element away from the optical axis. Both the object-side surface and the image-side surface of the third lens element are aspheric. The third lens element is made of plastic. |
申请公布号 |
US8724239(B2) |
申请公布日期 |
2014.05.13 |
申请号 |
US201213438674 |
申请日期 |
2012.04.03 |
申请人 |
TSAI TSUNG-HAN;CHOU MING-TA;LARGAN PRECISION CO., LTD |
发明人 |
TSAI TSUNG-HAN;CHOU MING-TA |
分类号 |
G02B9/12;G02B13/00;G02B13/18 |
主分类号 |
G02B9/12 |
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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