发明名称 |
VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL DEVICE, AND MANUFACTURING METHOD FOR VARIABLE MAGNIFICATION OPTICAL SYSTEM |
摘要 |
PROBLEM TO BE SOLVED: To provide a compact variable magnification optical system and an optical device which exhibit superior optical performances, and to provide a manufacturing method for the variable magnification optical system.SOLUTION: A variable magnification optical system: comprises a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a rear lens group GR in this order from the object side, where the first lens group G1 includes at least one lens having a positive refractive power and at least one lens having a negative refractive power; is configured such that a distance between the first lens group G1 and the second lens group G2 and a distance between the second lens group G2 and the rear lens group GR are changed when magnification from a wide-angle end state to a telephoto end state; and fulfills a prescribed formula. |
申请公布号 |
JP2014085493(A) |
申请公布日期 |
2014.05.12 |
申请号 |
JP20120233966 |
申请日期 |
2012.10.23 |
申请人 |
NIKON CORP |
发明人 |
KOHAMA AKIHIKO;YAMASHITA MASAFUMI |
分类号 |
G02B15/20;G02B13/18;G03B5/00;H04N5/232 |
主分类号 |
G02B15/20 |
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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