Aspheric wide-angle long flange video lens

The invention discloses an aspheric wide-angle long flange video lens, which sequentially comprises a first lens group, an iris diaphragm and a second lens group along a light incidence direction, the first lens group and the second lens group both have positive focal power, the first lens group is...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: JIANG JIANXI, HUANG GUOSHAN, ZHENG ZHONGLIANG
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses an aspheric wide-angle long flange video lens, which sequentially comprises a first lens group, an iris diaphragm and a second lens group along a light incidence direction, the first lens group and the second lens group both have positive focal power, the first lens group is a fixed group, and the second lens group is a focusing group capable of moving along an optical axis; the first lens group and the second lens group satisfy the following relationships: 1.6 lt; f1/f2lt; 2.1); wherein f1 represents the focal length value of the first lens group, and f2 represents the focal length value of the second lens group, so that large aperture, high resolution, small distortion, long flange back focus and close-range focusing can be realized, meanwhile, a camera module matched with a relatively long flange back focus can be met, and the optical lens can be widely applied to the optical lens industry. 本发明公开了一种非球面广角长法兰视频镜头,沿光线入射方向依次包括第一透镜组、可变光阑以及第二透镜组,所述第一透镜组和第二透镜组均具有正光焦度,第一透镜组为固定组,第二透镜组可沿光轴移动的