I-L series reflected metallurgical microscopes are suitable to observe the surfaces of non-transparent object. They are equipped with vertical illuminator, plan achromatic objectives with long working distance (no cover glass), wide-field eyepieces and set polarizer device in trinocular. They provide clear and high-contrast picture, convenient operation and etc. They are the ideal instruments for research work in metallography, mineralogy, precision engineering, electronics and etc. They are suitable for scientific research, teaching demonstration in the colleges and factory.