液氦也用来冷却红外线探测器，核反应堆，以及核磁共振成像器械的超导磁体等。
Liquid helium cools infrared detectors, nuclear reactors, and the superconducting magnets used in MRI machines, too.
采用锤击法，利用冲击激励的宽频特性，研究了金属结构红外探测器的共振特性及影响振动噪声的力学因素。
Mechanical factors effecting on the vibration noise and resonance performance of IR detector were analyzed for the method of impact excitation using a hammer.
基于表面等离子体波共振技术的探测器中金属膜通常与被探测物直接接触，在金属膜和被探测物之间增加一层介质膜，可以对金属膜进行保护。
In the detector based on surface plasmon wave resonance, the metal film contacts the detected material directly. A dielectric layer is coated on the metal film to protect it.
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