可见+1.54μm激光/长波红外分色片分离可见光、激光和长波红外光, 在多通道成像光学系统中起着重要的 作用.分析了分色片基板和薄膜材料的选择, 优化设计并用电子束蒸发法制备了该分色片, 其反射率和透射率都达 到了94%以上, 已成功应用于实际光学系统.

Visible+1.54μm laser/longwave infrared dichroic beamsplitters, which separate the incident spectrum into visible light, laser and longwave infrared light, take an important role in multichannel imaging spectrum technique. The choice of substrates and coating materials was discussed. Then the coating design of reflecting the visible(400～800nm) and laser (1540nm) light while transmitting the longwave infrared(8～12μm) spectrum was analysed, and the beamsplitter was manufactured by e-gun evaporation.The measured reflectivity and transmittance of the corresponding channel are all above 94% and the dichroic beamsplitters has been used in practical optical system successfully.