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1. 发明授权

US08576496B2 Imaging lens system 有权
标题翻译：成像镜头系统
公开(公告)号：US08576496B2
公开(公告)日：2013-11-05
申请号：US13557152
申请日：2012-07-24
申请人： Dung-Yi Hsieh , Tsung-Han Tsai , Wei-Yu Chen
发明人： Dung-Yi Hsieh , Tsung-Han Tsai , Wei-Yu Chen
IPC分类号： G02B9/10 , G02B13/003 , G02B13/18
CPC分类号： G02B13/003
摘要： This invention provides an imaging lens system comprising two non-cemented lens elements with refractive power: a positive first lens element having a convex object-side surface at a paraxial region and a convex or flat image-side surface at the paraxial region; and a negative second lens element having a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and both the object-side and image-side surfaces being aspheric; wherein, the shape of the image-side surface of the second lens element changes from concave when near an optical axis to convex when away from the optical axis. By such arrangement, the imaging lens system has not only a shorter total track length for compact electronic products, but also the advantage of a more comparable focusing performance between the short wavelength and long wavelength applications with improved image quality.
摘要翻译：本发明提供了一种成像透镜系统，其包括具有屈光力的两个非胶合透镜元件：在近轴区域具有凸形物体侧表面的正的第一透镜元件和在近轴区域处的凸形或平坦的图像侧表面; 以及在近轴区域具有凹入物侧表面和在近轴区域处具有凹形图像侧表面的负第二透镜元件，并且所述物体侧和像侧表面都是非球面的; 其中，当离开光轴时，第二透镜元件的图像侧表面的形状从靠近光轴的凹部变为凸形。通过这种布置，成像透镜系统不仅具有缩短电子产品的总轨道长度，而且具有改善的图像质量的短波长和长波长应用之间的更可比较的聚焦性能的优点。

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