A biological microscope is a precision optical instrument used to observe biological sections, biological cells, bacteria, living tissue cultures, fluid precipitation, and other transparent or semi-transparent objects, as well as powders, fine particles, and other objects. Biological microscopes use transmission illumination, generally for observing transparent and semi-transparent samples, and cannot be used to observe opaque objects. So, what are the classifications of biological microscopes? Below, the editor from Shenshi Optics Valley will introduce it to everyone.
What are the classifications of biological microscopes:
1. Classification by positioning level. They can be divided into student-level, laboratory-grade, and research-grade biological microscopes.
2. Classification by the number of eyepieces. They can be classified as monocular, binocular, and triocular biological microscopes.
3. Classification by the relative position of the eyepiece and the moving table. They can be divided into upright biological microscopes and inverted biological microscopes. The objective lens of a upright (conventional) biological microscope is located above the moving stage, while the objective lens of an inverted biological microscope is located below the moving stage.
4. Classification by imaging principle. They can be divided into optical biological microscopes and electron biological microscopes.
The above content introduces the classifications of biological microscopes. Their optical technical parameters include: numerical aperture, resolution, magnification, depth of focus, field of view width, coverage difference, working distance, and more. These parameters are not always better the higher; they are interconnected and mutually constrained. In practical applications, the relationship between parameters should be coordinated according to the purpose and actual conditions of microscopy while ensuring resolution.
