The Leica Leica DM750 M dual tube material science microscope is a metallographic microscope used in education, conventional metallography, and public security science. Its unique LED reflected light illumination provides bright field, polarized light, and tilted light illumination modes, enabling observation of multiple different samples under the same microscope. The multifunctional mechanical stage can be adapted to both transmitted and reflected light applications, and can also be equipped with multiple sample holders, To fix specimens with different diameter sizes. Suitable for obtaining high-quality and clear images of various samples, it is an ideal optical equipment for industrial laboratories or materials science in basic material applications.