大口径光纤倒像器制备工艺研究

Research on preparation technology of optical fiber image inverters with large aperture

摘要: 光纤倒像器是微光夜视仪的核心元件，大口径光纤倒像器可实现宽视场、大视野、远视距的探测，但现有的扭转成型工艺无法制备出合格产品，采用旋转差速扭转成型工艺和双内炉加热设计相结合的工艺，最终制备出性能指标符合要求的大口径光纤导像器产品。测试结果显示，扭转区域的角度集中量减少为5.98 °/mm，对大口径光纤倒像器的边缘分辨率改善效果明显。

Abstract: The optical fiber image inverters are the key components which applied in low-light level night vision device, and the optical fiber image inverters with large aperture can achieve the detection of wide field of view, large view and further visual range. However, the existing twisting operation process cannot produce the qualified products. The twisting operation process with rotation differential velocity combined with double internal furnace heating design was adopted, and finally the large-aperture optical fiber image inverters with required performance indexes were prepared. The test results show that the angle concentration amount in twisting region is decreased to 5.98 °/mm, which significantly improves the edge resolution of the large-aperture optical fiber image inverters.