用于激光测距的1 572 nm窄带滤光膜
1 572 nm narrow-band filter in laser telemeter
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摘要: 介绍了用于激光测距机的1 572 nm窄带滤光膜的用途、特性和制备方法。利用计算机优化软件对多腔结构进行计算后, 得到了损耗小、制备方便、重复性好的膜系设计。讨论了薄膜的光谱、温漂及均匀性等主要技术问题后，给出了特性测试和环境实验结果。目前相关的带宽12 nm滤光膜应用在新型激光测距机中分别达到了精度±5 m和重复频率(1±0.1)Hz下11 km的使用效果。Abstract: This paper introduces the primary purpose, characteristics and coating methods of 1 572 nm narrow-band filters in the laser telemeter. The multiple-cavity filters with low loss and high reliability have been developed using the computer coating optimization software. After the discussion of the technique problems, such as spectrum, temperature excursion and uniformity of the filters, experimental results of environment and characteristics tests are presented. Presently, these narrow-band filters （12 nm pass-band width）have been used in 1 572 nm laser telemeters. The effects are 11 km effective ranging distance at the precision of ±5 m and the frequency of (1±0.1) Hz．
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Key words:
- laser telemeter /
- narrow-band filter /
- multiple-cavity /
- uniformity
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