Short History of the Microscope

Before 1600: In the 11th century Arab Alhazan explained the usage and characteristics of glass lenses. After 200 years, British natural philosopher Roger Bacon was familiar with this camera. However, glasses were not invented until late 12th century.

In the 1760's: a telescope was invented, Galileo improved it with his own model. About 1600, the microscope was invented by Hans and Zacharias Janssen. Early compound microscopes (using two lenses) can only magnify objects by 20 or 30 times their normal size due to poor lens quality.

The first large scale microscopic study progressed in 1665 when Robert Hooke announced Micrographia. He is an example of a copper plate observed with his own compound microscope. When he observed the cork at 30 times magnification, he created the word "cell"

In the late sixties Antony van Leeuwenhoek grinds his lens and started making a simple microscope. Each microscope is not a compound microscope but a powerful magnifying glass. Leeuwenhoek's handmade lens can magnify objects by 200 times! He observed animals and plant tissues, sperm cells and blood cells, minerals, fossils and so on. He also discovered nematodes and rotifers (microscopic animals) that discovered bacteria when seeing plaque samples from their teeth and other teeth.

1700 - 1800 's: Although the design of the basic microscope has not changed so much, in order to solve problems such as color distortion and bad resolution of the image, a better lens (using a different shape from more pure glass ) Was made. In the late nineteenth century, Ernst Abbe discovered that oil immersion lenses can prevent distortion of light at the maximum magnification. They are still being used with a 1000-fold objective microscope.

1900 - present: In 1931, German scientists invented the electron microscope. Such a microscope directs the beam of accelerated electrons to a cell sample and when an electron is absorbed or scattered by different parts of the cell, they form an image that can be captured by the electronically sensitive photographic plate. With this model, scientists can see a very small part magnified 1 million times. The only drawback is that visible cells are not observed with the electron microscope. However, compound microscopes have been improved with digital and other new technologies, making it much easier for anyone to use microscopes, from children to laboratory microbiologists.

Antoni van Leeuwenhoek made a great contribution to cell theory by making his own microscopic version. It was not the first microscope in history, it was one of the best microscopes of the time. He discovered bacteria, microscopic protists, sperm cells, blood cells, microscopic nematodes and rotifers. His research has been widespread and distributed, and has opened up the whole world of micro-life for the consciousness of scientists.

In the late sixties Antony van Leeuwenhoek grinds his lens and started making a simple microscope. Each microscope is not a compound microscope but a powerful magnifying glass. Leeuwenhoek's handmade lens can magnify objects by 200 times! He observed animals and plant tissues, sperm cells and blood cells, minerals, fossils and so on. He also discovered nematodes and rotifers (microscopic animals) that discovered bacteria when seeing plaque samples from their teeth and other teeth.

Prior to the invention of composite microlenses, scientists had to use basic microscope lenses. Thanks to the basic microscope head, innovative thinking helps drive an intuitive microscope. The exploration of the two convex lenses to provide better magnification resulted directly in the modification of the microscope lens and the appearance of the final composite microlens. This material microscope is a hybrid of many microscope functions. I am looking forward to seeing some layout and version in the Toronto store. Among the best-selling products are Carl Zeiss, Leica, Olympus, Nikon microscope, and Meiji, but imported microscopes from China are getting customers who prefer cheaper and more accurate microscope heads.