暗视野显微镜常用于不染色活菌及螺旋体等的形态和动力检查，但中、小医院，防疫站等常没有暗视野聚光器，因此难以开展此项检查，医学院校虽有，但数量少、满虽不了教学需要。我们在微生物实验教学过程中，根据暗视野聚光器的基本原理，在上海光学仪器厂生产的ZXA型普通光学显 Dark-field microscopes are often used for the examination of morphology and dynamics of non-stained live bacteria and spirochetes. However, dark-field condensers are often not available in small and medium-sized hospitals, epidemic prevention stations, etc. Therefore, it is difficult to carry out this examination. Although there are medical schools, the number of Little, full, though not necessary for teaching. During the teaching of microbiological experiments, according to the basic principles of dark-field concentrators, the ZXA-type ordinary optical display produced at Shanghai Optical Instrument Factory