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System and method for changing spectral range of a cryogenically cooled detector
System and method for changing spectral range of a cryogenically cooled detector
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机译:用于改变低温冷却探测器的光谱范围的系统和方法
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摘要
The provided optical system allows selective spectral transfer of radiation, and provides a reflecting field of view at an undesired range directed towards cold surfaces. A removable spectral filter having a high transmittance at a first spectral range and a low transmittance at a second spectral range is disposed outside a cold shield. A reflective surface faces the detecting device and provides the detector a reflecting field of view at the second spectral range directed back towards the cold shield, and a blackened cold skirt thereof. Alternatively, a dichroic mirror is disposed inside the cold shield and has a high reflectance at a first spectral range and a high transmittance at a second range. The detecting device includes a first and a second arm of the cold shield to accommodate respective optical channels.
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