Some laws obeyed by the beam expanding by use of the thin lens are discussed.

讨论了用薄透镜扩束时应遵从的规律。

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This article introduced the imaging principle of the thin lens and the refraction system of eyes. This article also analyzed the Simulation and Remedy of the Myopic eye.

介绍薄透镜成像原理和眼屈光系统。分析近视眼的模拟与矫正。

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The lens is also thin, which means it could be incorporated into a standard liquid crystal display, says Bathiche.

这个镜头很薄，这意味着可以装入一个标准的液晶显示器，Bathiche说。

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Despite the 22x zoom lens, the camera was very thin and light -- it should be able to tuck into a pocket just fine.

ENGADGET

Then your doctor uses a thin tube equipped with a camera lens and light (laparoscope) to view the area.

CNN: Ectopic pregnancy

So... hyperbole aside, the FX30 is thin and features a 3.6x LEICA DC VARIO-ELMARIT optical zoom lens, 7.2 megapixel CCD, Mega OIS optical image stabilization, Venus Engine III image-processing for shooting at ISO 1250, and a 2.5-inch 207k pixel LCD (the L74 throws down 230k pixels) with "Power LCD" to boost brightness by 40% (at the expense of battery life) when outdoors.

ENGADGET: Panasonic's DMC-FX30 wide-angle 7.2 megapixel shooter: not quite the world's slimmest