日本奥林巴斯显微镜在我国使用较为普遍。显微镜中变光源电路设计紧凑,使用方便,但说明书中无图。我院有两台BH型显微镜均出现过电压不稳,光源瞬间闪动,使用不便。作者在BH型显微镜原调光电路的基础上,进行简单改造,同一般调光台灯相似,使用至今都未出现故障。改装后的电路如图 Japan Olympus microscope is more common in our country. Microscope light source circuit design is compact, easy to use, but the manual without map. Our hospital has two BH microscope over voltage instability, flashing light source, the use of inconvenience. Based on the BH original microscope dimming circuit, the author made a simple rebuild, similar to the ordinary dimming table lamp, so far it has not failed. Modified circuit shown in Figure