Using excellent infinity optical system and modular function design concept, it is easy to upgrade the system and realize polarized light observation and dark field observation. The compact and stable high-rigidity body fully reflects the anti-vibration requirements of microscope operation. The ideal design with ergonomic requirements makes the operation more convenient and comfortable, and the space is wider. It is suitable for microscopic observation of metallographic structure and surface morphology. It is an ideal instrument for metallurgy, mineralogy and precision engineering research.