| 摘要 |
The invention relates to a zoom optical system that makes it possible to offer a sensible tradeoff between cost savings and size reductions and an electronic system that incorporates it. The zoom optical system comprises a lens group having negative refracting power and a lens group having positive refracting power. At least one lens is formed by molding of a first lens blank ( 11 ) that provides a surface including at least an optical function surface after molding, and a second lens blank ( 12 ) that provides a surface other than said surface including at least an optical function surface after molding, wherein the first lens blank ( 11 ) and the second lens blank ( 12 ) are integrated into a one-piece lens ( 10 ).
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