【摘要】 一种结构新颖,性能优异的球载红外天文望远镜的副镜斩波器已经研制成功.使用一对自制的扁平动圈式直线电机作为驱动装置,工作时不存在任何机械碰击和摩擦,不仅提高了斩波效率而且避免了通常副摆工作时所产生的机械噪声对红外探测器的干扰. 测试结果表明,当斩波频率为10Hz时,调制方波上升沿接近2ms,无任何超调且和摆幅大小无关.该系统已成功地用于1990年6月15日夜在北京香河地区上空进行的球载红外望远镜的首次远红外飞行观测.更多还原

【Abstract】 An improved chopping secondary system for a 30 cm balloon-borne IR telescope has been developed. This telescope (BIT) was flown at altitude of 32kin on June 15, 1990 for conducting far-infrared observations in China. Design and overall properties of the chopping secondary system are presented. The important feature of this chopping secondary system is its control driver which is a new type of vibrator designed and made by ourselves. The whole system including the control circuit is very simple, lightweight and low-cost. A 2ms rise time of the 93 mm secondary mirror motion was achieved at a frequency of 10Hz.更多还原