Nolt I G, Kirby R D, Lytle C D, Sievers A J
Appl Opt. 1969 Feb 1;8(2):309-14. doi: 10.1364/AO.8.000309.
A far ir spectrometer has been built which uses a double pass optical system to increase the spectral dispersion. Because of the energy limitations in this spectral range, this means of increasing the dispersion is an efficient way to improve the resolving power of a grating monochromator. The same optical system is also used to advantage in a lamellar grating interferometer where the increased dispersion improves the performance at higher frequencies. Consideration is also given to instrument errors and signal noise which can affect, and in some cases limit, the present performance of a far ir Fourier interferometer.
已经制造出一种远红外光谱仪，它采用双程光学系统来增加光谱色散。由于该光谱范围内的能量限制，这种增加色散的方法是提高光栅单色仪分辨能力的有效途径。同样的光学系统在层状光栅干涉仪中也有优势，在这种干涉仪中增加的色散可提高高频下的性能。还考虑了可能影响并在某些情况下限制远红外傅里叶干涉仪当前性能的仪器误差和信号噪声。
