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本专利阐述的近红外跟踪系统与目视观测系统共用一个镜头,这样可使瞄准达到最高精度并保持瞄准状态。通过波罗棱镜上的多层二向色膜把光分成两个光谱区。(美国专利号:5193025)
The near-infrared tracking system described in this patent shares a single lens with the visual inspection system to provide the highest level of aiming accuracy and aiming at aiming. The light is split into two spectral regions by a multilayer dichroic film on the Polo prism. (U.S. Patent No. 5193025)