| 摘要 |
A lens system ( 46 ) for a digital camera consecutively includes a first lens element ( 20 ), a second lens element ( 30 ), and a third lens element ( 40 ). The first lens element is biconvex and has a first aspheric surface ( 22 ) and an opposite second aspheric surface ( 24 ). The second lens element is concavo-convex and includes a third aspheric surface ( 32 ) and an opposite fourth aspheric surface ( 34 ). The third lens element convexo-concave and has a fifth aspheric surface ( 42 ) and an opposite sixth aspheric surface ( 44 ). The first lens element is made of glass, and the second lens element and the third lens are made of optical plastic.
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