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发明授权
CN106556921B 摄像透镜以及摄像装置 失效 - 权利终止

摄像透镜以及摄像装置
摘要：
本发明提供一种不使全长变化而能够对焦、焦点调节范围宽、且抑制了因对焦导致的像差变动而具有良好的光学性能的摄像透镜以及具备该摄像透镜的摄像装置。摄像透镜从物侧起依次由在对焦时不动的第一透镜组(G1)、在从远距离物体向近距离物体的对焦时向物侧移动的正的第二透镜组(G2)、以及在对焦时不动且由一片正透镜构成的第三透镜组(G3)。第二透镜组(G2)从物侧起依次由将双凸透镜以及物侧的面的曲率半径的绝对值比像侧小的负透镜接合而成的第一接合透镜、和将像侧的面的曲率半径的绝对值比物侧小的负透镜以及物侧的面的曲率半径的绝对值比像侧小的正透镜接合而成且具有正光焦度的第二接合透镜构成。摄像透镜满足规定的条件式。
摘要（英）：

An imaging lens includes, in order from the object side, a first lens group fixed during focusing, a positive second lens group moved toward the object side during focusing from a distant to a close object, and a third lens group fixed during focusing and including one positive lens. The second group includes, in order from the object side, a first cemented lens including a biconvex lens and a negative lens having a smaller absolute value of curvature radius of the object-side surface than of the image-side surface, and a second cemented lens having a positive refractive power and including a negative lens having a smaller absolute value of curvature radius of the image-side surface than of the object-side surface and a positive lens having a smaller absolute value of curvature radius of the object-side surface than of the image-side surface. The imaging lens satisfies specific condition expressions.

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