发明名称 IMAGING LENS, OPTICAL APPARATUS EQUIPPED THEREWITH, AND METHOD FOR MANUFACTURING IMAGING LENS
摘要 The imaging lens includes, in order from an object side, a first lens group having positive refractive power; and a second lens group having the positive refractive power, the first lens group being fixed with respect to an image plane, the second lens group being moved toward the object side to adjust a focus on a close object, and a given conditional expression being satisfied, thereby disclosing a downsized imaging lens having a wide angle of view, capable of preferably correcting various aberrations upon focusing on a close object from an infinitely distant object and having high optical performance over an entire picture, an optical apparatus including the imaging lens and an imaging lens manufacturing method.
申请公布号 US2011317281(A1) 申请公布日期 2011.12.29
申请号 US201113166654 申请日期 2011.06.22
申请人 TAKE TOSHINORI;NIKON CORPORATION 发明人 TAKE TOSHINORI
分类号 G02B15/14 主分类号 G02B15/14
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