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概述了声光可调谐滤光器 (AOTF)的基本色散原理 ,介绍了以AOTF为色散元件的红外单色系统的组成。对光源准直系统和系统工作距离进行了分析讨论。对DDS的使用以及DDS与DSP之间接口设计进行了介绍。理论和实验表明 ,输出红外光波数与驱动频率成良好线性关系。系统输出红外光波长范围 2 5～ 5 0 μm ,光谱半宽度为 15nm
The basic principle of dispersion of acousto-optic tunable filter (AOTF) is introduced. The composition of infrared monochromatic system with AOTF as dispersive element is introduced. The collimation system of light source and system working distance are analyzed and discussed. The use of DDS and the interface design between DDS and DSP are described. Theoretical and experimental results show that the output of infrared wave number and driving frequency into a good linear relationship. System output wavelength range of infrared 2 5 ~ 5 0 μm, spectral half-width of 15nm