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CN102298197B 成像镜头、配备其的光学设备和用于制造成像镜头的方法 有权

成像镜头、配备其的光学设备和用于制造成像镜头的方法
摘要：
涉及成像镜头、配备其的光学设备和用于制造成像镜头的方法。一种在单反数字照相机中安设的成像镜头(SL)，按照从物体侧的次序包括：第一透镜组(G1)，和具有正折射光焦度的第二透镜组(G2)。第一透镜组(G1)按照从物体侧的次序包括：具有带有面向物体侧的凸形表面的负弯月形状的第一透镜构件(L11)、具有带有面向物体侧的凸形表面的负弯月形状的第二透镜构件(L12)、和第三透镜构件(L13)。第三透镜构件(L13)包括置于最物体侧的双凹透镜。成像镜头(SL)包括至少六个或者更多透镜构件，由此提供一种具有优良光学性能的、足够快速的成像镜头，该成像镜头是具有非球面的大孔径、单焦距、广角镜头。
摘要（英）：

An imaging lens SL installed in a single-lens reflex digital camera includes, in order from an object side, a first lens group G1, and a second lens group G2 having positive refractive power. The first lens group G1 includes, in order from the object side, a first lens component L11 having a negative meniscus shape with a convex surface facing the object side, a second lens component L12 having a negative meniscus shape with a convex surface facing the object side, and a third lens component L13. The third lens component L13 includes a double concave lens to the most object side. The imaging lens SL includes at least six lens components or more, thereby providing a sufficiently fast imaging lens having excellent optical performance, which is a large aperture, single-focal-length, wide-angle lens having an aspherical surface.

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