Where’s the laser lens for this new material?

适合新订单原材料的激光镜头在哪里？

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Protective countermeasures are under development, including lens shutters and filters that block certain laser frequencies.

防御性对策正在开发，包括透镜光闸及滤波器，能阻止某个频谱的激光。

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It is using its mast-mounted colour cameras and laser spectrometer, together with its arm-held "hand lens" camera and X-ray spectrometer, to try to find the best drill candidate.

BBC: Curiosity Mars rover deploys its rock brush

However, LG's Laser TV makes installation and viewing easier by allowing users to place the lens a mere 22 inches (approximately 56 centimeters) from the screen, while having the flexibility to position it near the floor or fasten it to the ceiling.

ENGADGET: LG 'Hecto' laser TV projector to debut at CES 2013, promises a 100-inch screen from 22-inches away