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    • 6. 发明授权
    • Zoom lens system
    • 变焦镜头系统
    • US07280286B2
    • 2007-10-09
    • US11513123
    • 2006-08-31
    • Satoshi Hayakawa
    • Satoshi Hayakawa
    • G02B15/14
    • G02B15/173
    • Providing a zoom lens system that can excellently correct aberrations over entire range from a wide-angle end state W to a telephoto end state T in spite of having a high zoom ratio including, in order from an object, a first group G1 having positive power, a second group G2 having negative power, a third group G3 having positive power, a fourth group G4 having negative power, and a fifth group G5 having positive power. When zooming from the wide-angle end state W to the telephoto end state T, a distance between the first group G1 and the second group G2 increases, a distance between the second group G2 and the third group G3 decreases, a distance between the third group G3 and the fourth group G4 increases, and a distance between the fourth group G4 and the fifth group G5 decreases. Given conditions are satisfied.
    • 提供一种变焦透镜系统,其可以从广角端状态W到远摄端状态T的整个范围内优异地校正像差,尽管具有高变焦比,其包括从物体起依次具有正的第一组G 1 功率为负的第二组G 2,具有正功率的第三组G 3,具有负功率的第四组G 4,以及具有正功率的第五组G 5。 当从广角端状态W变焦到远摄端状态T时,第一组G 1和第二组G 2之间的距离增加,第二组G 2和第三组G 3之间的距离减小, 第三组G 3和第四组G 4之间的距离增加,并且第四组G 4和第五组G 5之间的距离减小。 给定条件满意。