Opt Lett. 2019 Mar 15;44(6):1500-1503. doi: 10.1364/OL.44.001500.
A new protocol of hyperspectral data acquisition with an acousto-optical tunable filter is proposed and tested experimentally. Correction for the illumination source spectrum and regular spectral sensitivity factors is embedded in the data acquisition routine. The protocol is based on the adaptive electronic setting of the filter transmission passband inversely proportional to the power spectrum of the light source. Spectral equalization of the light source spectrum in a hyperspectral imaging spectrometer is demonstrated with 3% standard deviation over the bandwidth 465-820 nm. The broadening of the point-spread function does not exceed 20% at fourfold bandwidth extension owing to a confocal configuration of the spectrometer.
提出并实验测试了一种使用声光可调谐滤波器的高光谱数据采集新方案。在数据采集过程中嵌入了对光源光谱和常规光谱灵敏度因子的校正。该方案基于滤波器传输通带的自适应电子设置，其与光源的功率谱成反比。在带宽为 465-820nm 的范围内，通过自适应电子设置，在高光谱成像光谱仪中实现了光源光谱的 3%标准偏差的光谱均衡。由于光谱仪采用共焦配置，因此在四倍带宽扩展的情况下，点扩散函数的展宽不超过 20%。
