What is the general magnification of an electron microscope?
The magnification of a microscope refers to the product of the magnification of the eyepiece and the objective lens. What is magnified is the length or width of the object image. For example, the magnification of the eyepiece is 10 times and the magnification of the objective lens is 40 times. The magnification of the microscope is ═10×40═400 times.
There are two concepts of total magnification, one is optical magnification, and the other is digital magnification (digital magnification is only involved when an imaging device is connected).
1. Optical magnification refers to the magnification factor of the object we observe through the microscope eyepiece. The calculation method of optical magnification is relatively simple, that is, objective lens magnification * eyepiece magnification.
For example: To calculate the magnification of a stereo microscope, the objective lens of a continuously variable stereo microscope is usually 0.7-4.5 times. In the case of a 10x eyepiece, the total magnification of this microscope is 7-45 times.
The calculations for biological microscopes and metallographic microscopes are simpler. The general objective lens configuration is 4x, 10x, 40x, and 100x. The conventional eyepiece configuration is 10x, and there are also 16x, 20x, etc., as long as the eyepieces are Multiply it with the magnification of the objective lens to get the total magnification.
2 digital magnification
Digital magnification refers to the magnification factor displayed on the image after being connected to an external device. Currently, most people on the market use a trinocular microscope, which is connected to a computer, monitor or TV through a CCD device for imaging observation to reduce eye fatigue. It is also easy to share with others.
