How many years was the electron microscope born and who invented the electron microscope

The angle of view magnification of the microscope m=-(s*d) (fo*fe) where fo and fe are the focal lengths of the objective lens and eyepiece, respectively; d is the distance from the object focus to the image focus, that is, the length of the optical cylinder Therefore, the working distance of the objective lens is related to the focal length of the objective lens, the longer the focal length of the objective lens, the lower the magnification, and the longer the working distance. I hope to help you o ( o don't know how to ask more professional answers can contact Beijing Presaisi Instrument, product service: We have established a domestic sales network with professional knowledge and many years of valuable experience in selling products.

In order to provide high-quality services in a more timely manner, the company has established business divisions in Northeast China, East China, Northwest China, North China and South China. We have a dynamic and highly qualified sales team. Thank you!

The microscope was invented by Jas Jensen and Hans Lippers. Yas Jensen was an optician, but he didn't make any important observations with a microscope; Hans Lippers is a scientist from the Netherlands. Later, a man named Robert Hooke improved the microscope from a single to a double one, and the magnification was greatly increased, which is what people commonly see in their daily lives.

Yas Jensen was an eyeglassmaker who invented the microscope around 1590. It is made with a concave mirror and a convex mirror, and the level of production is still very low. Although Jensen was the first person to develop a microscopic microscope, he did not discover the true value of the microscope.

Perhaps it is for this reason that Jensen's invention did not attract the attention of the world.

A microscope is an optical instrument composed of a lens or a combination of several lenses, which is a sign that mankind has entered the atomic age. It is mainly used to magnify tiny objects and become instruments that can be seen by the human eye. Microscopes: Optical microscopes and electron microscopes.

The current optical microscope can magnify the object file Zheng Wang's body by 1600 times, and the minimum limit of resolution is 1 2 wavelength, and the length of the mechanical barrel of the domestic microscope is generally 160 mm. Among them, the person who has made great contributions to the development of microscopes and microbiology is Leeuwenhoek, a Dutch national.

1. Luska, a young researcher at the Technical University of Berlin in Germany, made the world's first electron microscope in 1932;

2. The electron microscope is composed of three parts: the lens tube, the vacuum device and the power cabinet, and the application of this technology is based on the optical microscope, and the transmission electron microscope is magnified 1000 times on the basis of the optical microscope.

3. According to the structure and use, it can be divided into transmission electron microscope, scanning electron microscope, reflection electron microscope and emission electron microscope, etc., which has become an indispensable important tool in modern science and technology after more than 50 years of development.

Ernst Luska and Max Knorr-Bremse.