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电子多功能观片灯的研制中国医科大学（１１０００１）物理教研室徐跃平洪洋李冲弓长岭矿医院罗连奎观片灯是临床医生读片时不可缺少的器件。旧式观片灯主要存在两大弊端：一是频率低（市电频率５０Ｈｚ）产生的频闪，造成工作状态下亮度随时间不断变化，呈现摆动形式的明...
Development of electronic multi-functional film viewer China Medical University (110001) Department of Physics Xu Yueping Hong Yang Li Chong Bow Changling Hospital Luo Liankui film viewer is an indispensable device when reading films. There are two main drawbacks of the old style film viewer: one is the stroboscope with low frequency (mains frequency 50Hz), which causes the brightness in the working state to change with time, showing the form of swing ...