Biological microscopes are used to observe and study biological slices, biological cells, bacteria, living tissue culture, fluid sedimentation, etc. It can also observe other transparent or translucent objects, powders, fine particles and other objects.
A metallographic microscope is a microscope specially used to observe the metallographic structure of opaque objects such as metals and minerals. These opaque objects cannot be observed in ordinary transmitted light microscopes, so the main difference between metallographic and ordinary microscopes is that the former is illuminated by reflected light, while the latter is illuminated by transmitted light. In a metallographic microscope, the illumination beam is emitted from the direction of the objective lens to the surface of the object being observed, is reflected by the object surface, and then returns to the objective lens for imaging. This reflected lighting method is also widely used in the inspection of integrated circuit silicon wafers.
Stereo microscope, also known as "solid microscope" or "anatomy microscope", is a visual instrument with an upright three-dimensional sense. It is widely used in biology, medicine, agriculture, forestry, industry and marine. Various departments of biology.