A refractive defect of a lens or other optical system that prevents light rays from converging at a single point resulting in a blurred or imperfect image.

散光有折射缺陷的透镜或其它光学系统，阻碍光线汇聚于一个焦点，形成一个模糊或不完全的图象。

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Even the simple trilobite has an eye (complete with its double lens system) that's considered an optical miracle by today's standards.

按照今天的标准，即使是简单的三叶虫，它的眼睛(完美的双镜头系统)也是一个光学奇迹。

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A lens is an optical system including two refracting surfaces.

一个透镜是包含两个折射面的光学系统。

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Panasonic's new compact 3D lens for the LUMIX G Micro System features two optical systems installed within the diameter of the lens mount, creating stereo images from the left and right lenses that are then processed with a 3D image processing system.

ENGADGET: Panasonic's $900 Lumix GH2 officially debuts: 16MP, 1080p movie mode, 3D interchangeable lens

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

ECONOMIST: MONITOR

CDM's imaging system, it passes first through conventional optical elements, and then through a lens moulded into a shape of a cubic-like function (ie, with a surface which, instead of being spherical, is relatively flat in the centre but has scalloped edges).

ECONOMIST: MONITOR