发明名称 |
OPTICAL IMAGE PICK-UP LENS |
摘要 |
An optical image pick-up lens is formed from crescent-shaped first and second lenses that may be aspherical molded glass lenses or aspherical plastic lenses. A convex surface at a first side of the first lens faces toward an object, and a convex surface at a second side of the second lens faces toward a formed image. The lens enables reduced lens length and high resolution by satisfying the following relational expressions: 0.4f<=d<0.9f; 0.5f<=|R3|<=100f; and 0.01<|f2|/|f1|<0.9; where, f is an overall focal length of the lens; d is a distance from the first side of the first lens to the second side of the second lens; R3 is a radius of curvature of an object side of the second lens; f1 is a focal length of the first lens; and f2 is a focal length of the second lens.
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申请公布号 |
US2004184162(A1) |
申请公布日期 |
2004.09.23 |
申请号 |
US20030390780 |
申请日期 |
2003.03.19 |
申请人 |
E-PIN OPTICAL INDUSTRY CO., LTD. |
发明人 |
CHEN TZU-KAN |
分类号 |
G02B3/04;G02B13/00;G02B13/18;(IPC1-7):G02B13/18;G02B3/02 |
主分类号 |
G02B3/04 |
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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