光学
通带
波长
带阻滤波器
激光器
材料科学
滤波器(信号处理)
光学滤波器
物理
带通滤波器
计算机科学
低通滤波器
计算机视觉
作者
Neelam Gupta,Dennis R. Suhre
出处
期刊:Applied optics
[The Optical Society]
日期:2016-09-23
卷期号:55 (28): 7855-7855
被引量:11
摘要
A notch filtering operation was accomplished using a TeO2 acousto-optic tunable filter (AOTF) with 16 simultaneous overlapping passbands in the shortwave infrared wavelength region. By switching off specific radio frequency signals applied to the AOTF, laser wavelengths corresponding to the inactive passbands are rejected, providing see-through capability with the remaining wavelengths. The rejection level was determined by leakage through the sidelobes of adjacent passbands, as was shown by theory and corresponding measurements. By switching off multiple passbands near the laser wavelength, the rejection level can be increased at the expense of reduced see-through capability. The AOTF imaging system used telecentric confocal optics that compensate for AOTF aberrations, which are severe at high sidelobe operation.
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