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首页> 外文会议>Infrared spaceborne remote sensing and instrumentation XVI >Performance of a Cryogenic Michelson Interferometer
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Performance of a Cryogenic Michelson Interferometer

机译：低温迈克尔逊干涉仪的性能

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A cryogenic Fourier transform infrared spectrometer (Cryo-FTS) was developed for the Low Background Infrared (LBIR) facility at the National Institute of Standards and Technology (NIST). This spectrometer was developed for the Missile Defense Agency Transfer Radiometer (MDXR) that will be used to calibrate infrared sources that cannot be transported to NIST for calibration. When used inside the MDXR, the Cryo-FTS provides relative spectral measurements with a repeatability better than 1 % over the spectral range from 3 μrn to 15 μrn and at a spectral resolution of 0.6 cm~(-1). This level of performance is enabled by the use of an advancec real-time resampling method.rnThe compact interferometer uses a compensated Michelson configuration and has an operating temperature range between 10 K and 340 K with very low static beam redirection (< 215 μrad). The interferometer uses flat mirrors and a KBr beamsplitter and compensator. This optics maintains low wavefront distortion for infrared beams of up to 2 cm diameter and 5 mrad divergence. It integrates a digitally servo-controlled porchswing mechanism to provide an accurate and repeatable optical path difference and is supported by a Wavefront Alignment (WA) system to correct for wavefront residual tilt in real time using a fibre optic coupled metrology system. The interferometer provides modulation efficiency of better than 44% with limited power dissipation (< 2.8 W) during operation.
机译：美国国家标准技术研究院（NIST）的低本底红外（LBIR）设施开发了一种低温傅里叶变换红外光谱仪（Cryo-FTS）。该光谱仪是为导弹防御局转移辐射计（MDXR）开发的，它将用于校准无法传输到NIST进行校准的红外源。当在MDXR内部使用时，Cryo-FTS可提供相对光谱测量，在3 cm至15μm的光谱范围内，光谱分辨率为0.6 cm〜（-1），重复性优于1％。通过使用先进的实时重采样方法，可以达到这种性能水平。紧凑型干涉仪采用补偿的迈克尔逊配置，工作温度范围在10 K至340 K之间，静态光束重定向非常低（<215μrad）。干涉仪使用平面镜和KBr分束器和补偿器。该光学器件可对直径最大为2 cm且发散度为5 mrad的红外光束保持低波前畸变。它集成了数字伺服控制的门廊摆动机制，可提供准确且可重复的光程差，并由波前对准（WA）系统支持，可使用光纤耦合计量系统实时校正波前残留倾斜。干涉仪在工作期间具有有限的功耗（<2.8 W），调制效率超过44％。

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