It has a lens system to focus light onto the film at the back of the camera.

它的镜片系统可以将光线聚焦到相机后部的胶片上。

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The camera system contains not only the detector but also, and very importantly, a lens system.

摄像系统不仅仅包含一个照相机，而更重要的，有一个透镜系统。

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One way to get the best of both worlds is to use GRDDL, a system for viewing XML through an RDF lens.

集两者之大成的方法之一就是使用 GRDDL，一种通过 RDF 的视角查看 XML 的系统。

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Cheap sensors that help cars avoid collisions could emerge from research into a lens-less imaging system.

BBC: Lens-less camera emerges from metamaterials work

In a conventional optical system, light rays enter through a lens and converge at a point to form an image.

ECONOMIST: MONITOR

New lens elements and glass materials ensure the clearest possible imaging performance, and the proven dust and splashproof mechanism originally featured in the Four Thirds SHG (Super High Grade) series lenses is now incorporated for the first time in a Micro Four Thirds System lens.

ENGADGET: Olympus unveils a cavalcade of point and shoot cameras and a PEN lens at CES