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• Time of issue:2019-12-25
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(Summary description)Microscope is an optical refraction imaging system composed of two kinds of lens, which can be affected by different magnification after different objective lens is magnified. In general, in the focal length section, the lens closer to the object becomes the objective lens, while the image close to the eye is virtual image. This kind of lens is called objective lens, and the eyepiece and objective lens are the most basic lenses of microscope.
With the progress of science and technology, people need to observe the problem more precisely, so the microscope is more and more clear, but its basic optical principle is mainly divided into two aspects
First, refraction and refractive index, because light in the same medium, when the density of media is different, it is easy to refract. This is because of the different propagation speed of light in different media. However, when irradiating the transparent object in a non perpendicular way, it will change the direction, so it forms the refraction angle with the normal.
Second, the performance of the lens. The lens is the basic component of optics, and the objective lens and eyepiece are all composed of objective lens. At the same time, the lens is also divided into convex lens and concave lens. The main basis of microscope imaging is light. When a beam of parallel light irradiates a point behind the lens, this point is called the focus, and adjusting different focal length according to the focus will get different times However, the image passing through a concave lens is usually an upright virtual image, while a convex lens is an upright real image. And when using the objective lens, we should pay attention to the optical accessories of the lens.
Moreover, according to the development of science and technology, there are various kinds of microscopes, such as full-phase microscope, polarizing microscope, reflecting microscope, and so on, and the quantity required is relatively large.