A direct tracing method of the laser ray-path is provided.

提供了一种激光光路的直接追踪方法。

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The puncture path was marked on patient′s body surface according to the laser ray projected into the body surface;

根据机架激光灯束在体表的投影，标出体表穿刺径路；

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Quinophthalone compound, mixed colorant, laser ray transmitting colored resin composition, and laser-welded product.

喹酞酮化合物，混合着色剂，透射激光的着色树脂组合物，激光焊接产品。

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This X-ray laser was aimed at a piece of aluminum foil, and in less than a trillionth of a second, the laser heated the foil up to 2 million degrees celsius (3.6 million degrees Fahrenheit).

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This is made possible by the fact that Blu-ray uses a 405nm laser to read its 0.1mm deep info layer, while HD DVD uses the same blue laser wavelength at the depth of 0.6mm.

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Instead, physicians and diagnosticians have to print out the digital images on X-ray-type film or laser paper.

FORBES: Fact And Comment