Wyatt C L, Esplin R W
Appl Opt. 1974 Nov 1;13(11):2651-3. doi: 10.1364/AO.13.002651.
The application of multiplex spectrometry to cryogenically cooled LWIR extrinsic photodetectors is limited by system noise. This noise limitation results in a detector NEP that is directly proportional to bandwidth. Therefore, multiplex schemes that require increased bandwidth are not productive of real advantage. However, doubly encoded systems that are based on 2n - 1 or n + N - 1 measurements have the potential to provide a real throughput gain proportional to the number of elements used on the throughput matrix.
多路光谱法在低温冷却的长波红外非本征光电探测器中的应用受到系统噪声的限制。这种噪声限制导致探测器的噪声等效功率与带宽成正比。因此，需要增加带宽的多路复用方案并不能带来实际优势。然而，基于2n - 1或n + N - 1测量的双重编码系统有可能提供与吞吐量矩阵上使用的元素数量成比例的实际吞吐量增益。
