JXL-300BDDIC series upright metallurgical microscopes are suitable to observe the surface of opaque object or transparent object, it is also with the Differential Interference Contrast system which is for differential-interference -contrast-observation in the surface of un-transparent object and micro-observation in transparent object. It equipped excellent UIS optical system and modularization function design, provide excellent optical performance and the update of the system, update system expediently and provided observation in reflected or transmitted and mixed illumination, polarizing observation, dark field observation and DIC observation. This instruments have beautiful sculpt, convenient control and clear image. They are the ideal instrument in research work in biology, metallography, mineralogy, precision engineering, electronic, etc.