Microscopy Imaging 30, Microscopy Imaging Features

In fact, ordinary optical microscopes are based on the imaging principle of convex lenses, and they need to go through two imaging of convex lenses. The first time is imaged through the objective lens (convex lens 1), the object should be between one and two times the focal length of the objective lens (convex lens 1), and according to the principles of physics, the real image should be magnified and inverted. Then, the first image of the object is used as the "object", and the second image is taken through the eyepiece.

Since we observe on the other side of the eyepiece, according to the principle of optics, the second image should be a virtual image, so that the image and the object are on the same side. Therefore, the image of the first time should be within one time of the focal length of the eyepiece (convex lens 2), so that after the second imaging, the image of the second image is an enlarged upright virtual image. If it is relative to the real thing, it should be an upside-down enlarged virtual image.

The objective lens magnifies the image for the first time as an inverted virtual image, and then the eyepiece magnifies the virtual image again!

The kind you said There are a lot of microscopes now, and the principles of optics and electronics are different!

1.The length of the microscope eyepiece was negatively correlated with magnification, and the length of the objective lens was positively correlated with magnification. That is, the longer the eyepiece length, the lower the magnification; The longer the objective length, the higher the magnification1

The imaging process of the microscope: the observed object is placed between the first and two times the focal length of the objective lens to form an inverted magnified real image, and the real image is within one time of the focal length of the eyepiece, so the human eye sees the second magnified virtual image. This is the scale-up process.

The longer the objective lens, the closer the convex lens of the objective lens to the object being observed, i.e., the object is closer to the focal point but is still between the first and second focal lengths, so the magnification becomes higher. The longer the eyepiece, the closer the convex lens of the objective lens to the object being observed, but the magnification is reduced because of the distance between the first time and the double focal length.

It is the lens principle of the use.

1. The magnification of the microscope is equal to the product of the magnification of the objective lens used and the magnification of the eyepiece. The smaller the magnification of the eyepiece, the longer the lens, and the smaller the magnification of the objective, the shorter the lens. 2. The number of cells under low magnification is large, the volume is small, and the field of view is bright; The number of cells under high magnification is small, the volume is large, and the field of view is dark.

3. The image formed under the microscope is an inverted virtual image, that is, the upper and lower noises or the left and right are upside down. If the image of the cell under the microscope is "upper right", it is actually "lower left" on the slide, and the slide should be moved to the "top right" to move it to the field of view**.

A microscope is an optical instrument consisting of a lens or a combination of several lenses. An optical microscope is mainly composed of an eyepiece, an objective lens, a stage, and a reflective ascending scope. Both the eyepiece and the objective lens are convex lenses with different focal lengths.

The focal length of the convex lens of the objective lens is smaller than that of the convex lens of the eyepiece. The objective lens is equivalent to the lens of the projector, and the object passes through the objective lens into an inverted and magnified real image. The eyepiece is equivalent to an ordinary magnifying canton, and the real image is formed into an upright and magnified virtual image through the eyepiece.

Objects that pass through the microscope to the human eye become inverted and magnified virtual images. Mirrors are used to reflect and illuminate the object being observed. Reflectors generally have two reflective surfaces: one is a flat mirror, which is used when the light is strong; One is a concave mirror, which is used when the light is low and concentrates the light.

The microscope is one of mankind's greatest inventions. Before its invention, human ideas about the world around us were limited to what the naked eye could see, or by using a hand-held lens to help the naked eye. Microscopes have opened up a whole new world of human vision, and for the first time people have seen hundreds of "new" tiny animals and plants, as well as the inner workings of everything from the human body to plant fibers.

Microscopes also help scientists discover new species and help doctors with diseases.