The Leica DM4 P semi-automatic upright polarizing microscope has a simple structure, and with the help of coding function, it can flexibly adapt to various measurement tasks. Its operation is flexible, safe, and simple, making it more suitable for academic research, novice operators, and multi user environments. A 25mm wide field of view displays a clear overview image, identifying the details of interest. Equipped with a 6-position objective lens turntable with different magnifications, it can obtain richer sample information. Especially for studying crystal structure, a polarizing microscope is a better choice. Whether it is minerals, polymers, plastics, drugs, pharmaceuticals, binders, fuels, etc., this polarizer can make samples present crystal clear and transparent images, observe small details of interest, and complete research or quality control testing tasks.