Zoom lens and imaging apparatus
一种变焦镜头、像侧的技术,应用在放映装置、洗印装置、透镜等方向,能够解决焦点移动等问题,达到提高画质、对焦状态良好的效果
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[0097] 0030
[0098] The best mode for implementing the zoom lens and imaging device of the present invention will be described below with reference to the drawings.
[0099] 0031
[0100] The zoom lens of the present invention is composed of a plurality of lens groups, and the magnification is changed by changing the distance between each lens group. The last lens group located on the image side includes a sub-lens group GS with a positive refractive index and is arranged adjacent to the image side. 1. The sub-lens group GR with a positive refractive index can make the above-mentioned sub-lens group GS displace along the direction perpendicular to the optical axis to correct the image movement, assuming that the lateral magnification of the above-mentioned sub-lens group GS is βs, the above-mentioned sub-lens group GR When the lateral magnification is βR, the following conditional expressions (1) and (2) are satisfied.
[0101] (1) βs<1,
[0102] (2) 0<βR<1.
[0103] The ...
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Abstract
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