| 摘要 |
PROBLEM TO BE SOLVED: To provide a photographing optical lens set designed so that imaging quality is satisfactory, the volume of a lens set is reduced, astigmatism falls, and the number of lenses is reduced. SOLUTION: The photographing optical lens set comprises three lenses which are, in order from the object side to the image side: a first lens having positive refractive power and an aspherical face; a second lens having negative refractive power; and a third lens having negative refractive power and an aspherical face. If the focal distance of the third lens is f3 and the focal distance of the entire system is f, the condition of ¾f/f3¾>0.2 is satisfied. COPYRIGHT: (C)2008,JPO&INPIT
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