Optical delay line for stellar interferometer
Optical delay line for stellar interferometer
复制标题
恒星干涉仪光学延迟线
DOI：
10.1117/12.19188
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Emmanuel Manil
中科院分区：
文献类型：
--
作者：
B. Koehler;Emmanuel Manil
CHARON计划（由5个直径26厘米的望远镜组成的十字形阵列，允许可变基线达到50米）的主要设计准则之一是避免使用激光测量，主要是出于简单和成本的原因。目标是实现延迟线在平移过程中的振动水平可以忽略不计，即在15毫秒的曝光时间内，RMS小于12 nm，而不需要测量延迟线引入的实际光路长度。光学延迟线围绕着一个1米行程的零售市场转盘而建，转盘的移动速度可以在0.1微米/秒到1毫米/秒之间，同时产生低振动水平。结果表明，所获得的性能值在光学和机械方面都令人满意。
One of the major design guidelines of the CHARON program (consisting of a cross shaped array of five 26 cm diameter telescopes allowing variable baselines up to 50 m) was to avoid the utilization of a laser metrology, principally for simplicity and cost reasons. The objective was to achieve a delay line whose vibration level during translation remains negligible, i.e., less tham 12 nm RMS for a 15 msec exposure time, without any measurement of the actual optical path length introduced by the delay line. The optical delay line is built around a 1-meter stroke, retail-market translation table whose carriage can move at speeds between 0.1 micron/sec and 1 mm/sec, while generating a low vibrational level. Results indicate that the performance values achieved were satisfactory for both optical and mechanical aspects.