柔性硫系玻璃红外光纤传像束的制备与性能测试

讨论了红外光纤传像束的学术意义和制备工艺,制备了一种硫系玻璃红外光纤传像束并进行了专门的性能测试。选用As40S58Se2、As40S60作为芯棒和皮管玻璃组分,采用管棒法拉制成纤,利用人机结合的排丝工艺制备出了单丝直径为50μm,纤芯直径为40μm,576元正方形排列的红外光纤传像束。搭建了相应的实验测试平台,对光纤束排列规则度、断丝率、光学效率及传像束引起系统调制传递函数(MTF)下降量等指标进行了测试。测试表明,传像束断丝率为2.7%,衰减损耗低于0.5dB/m,光学效率约为31%,在红外光纤传像系统中光纤传像束引起的MTF下降量小于10%。最后,利用研制的红外传像束完成了红外成像实验,结果表明,红外光纤传像束能够实现良好的红外成像。

Fabrication and optical performances measurements of flexible chalcogenide imaging fiber bundles

The academic meanings of infrared imaging fiber bundles were researched and their fabrication technologies were given. A kinds of flexible chalcogenide infrared imaging fiber bundles were fabricated, and their characteristics were tested. By taking As₄₀S₅₈Se₂ and As₄₀S₆₀ as the rod and tube materials, the fibers were drawn by rod-in-tube technique. The infrared imaging fiber bundle with a core diameter of 40 μm and a cladding diameter of 50 μm was prepared by man-machine-integration technique and it shows squared arrangement which incorporates 576 individual fibers. A special experimental equipment was constructed. The properties of this imaging fiber bundle including spatial arrangement and shaping, blind-fiber ratio and optical transmission efficiency were measured, and the decrease of Modulation Transfer Function (MTF) in the system caused by infrared imaging fiber bundle were measured. Experimental results indicate that the fiber bundle shows a good spatial arrangement and shaping. The blind-fiber ratio is 2.7%, fiber attenuation loss is lower than 0.5 dB/m, and the optical efficiency is almost 31%. Moreover, The decrease of MTF resulted from the fiber bundle in the system is less than 10%. Finally, an infrared imaging experiment was implemented, and the result shows that fine infrared thermal images have been delivered through this system.