The camera works by illuminating objects with a laser that emits a different infrared frequency for every single pixel, allowing them to custom-amplify a signal that would otherwise be too dim to see.

该相机的工作原理是：用一束激光照在物体上，每一个像素点都被不同红外频率的激光照着，以此来优化放大在其他情况下太弱而看不见的信号。

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It works at a much lower frequency than the infrared sensors, and is less affected by dust particles.

它比红外传感器的频率要低得多，而且较少受到尘埃粒子的影响。

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Photovoltaic cells are usually most responsive to photons in the visible and ultraviolet parts of the spectrum, but they can also respond to high-frequency infrared photons.

光伏电池通常对光谱中的可见光和紫外线波段的光子受激性最好，但高频红外光子也能激发电流。

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It can use its High Frequency Instrument to look for the infrared emission from dust that is warmed by stars associated with far-off galaxies.

BBC: Science & Environment