History of Zacharias Janssen

Zacharias Janssen was born in 1580 in the state Windmills, the Netherlands, and died at the age of 58 years or more precisely in 1638. is a scientist who came from the Netherlands. The most famous inventions is the first microscope is used to see objects that are very small in size and difficult to reach when using the naked eye. Invention of the microscope is a major influence on the development of science and not a few of the discoveries that are beneficial to the world civilization examined using a microscope.

He is well aware that in this world there are objects with a smaller size and difficult to reach with the naked eye. In 1590, along with his father, he succeeded in creating a microscope using a convex and concave lens to magnify objects look very small in size. The first adjustment mechanism to focus the microscope created and perfected by Campini, a scientist who came from Italy, in 1668. Microscopy findings when it encourages other scientists, such as Galileo Galilei (Italy), to make the same tool. Even Galileo claimed self as the creator of the first that has made this tool in 1610.

Galileo completed the manufacture of microscopes and microscope in 1609 he made given the same name as the inventor, the Galileo microscope. This type of microscope uses optical lenses, so called optical microscope. The microscope is assembled from the optical lens has a limited ability to increase the size of the object. This is caused by the diffraction limit of light is determined by the wavelength of light. Theoretically, the wavelength of light is only up to about 200 nanometers. To that end, the lens-based optical microscope can not observe the size below 200 nanometers.

After that a Dutch national named Antony van Leeuwenhoek (1632-1723) continues to develop enlargement microscopic. Antony van Leeuwenhoek is not really a professional researcher or scientist. Actual profession is as a 'wine terster' in town Delf, Netherlands.  Leewenhoek using a very simple microscope to observe the river water, rain water, saliva, feces, and so forth. He is interested in the number of small objects that can move are not visible to the naked eye. He called moving objects before the 'animalcule' which he says is the animals that are very small. This discovery makes it more enthusiasm in observing the objects had to further improve his microscope. This is done by stacking more lens and put it on a silver plate. Finally Leewenhoek make microscopes that can magnify 250 times 200-300. 

Leewenhoek carefully recorded observations and send to the British Royal Society. One of the first on the letter dated 7 September 1674 he describes the very small animals which are now known as protozoa. Between the years 1963-1723 he wrote more than 300 letters that report various observations. One of them is the form of rods, cocci or spiral which is now known as bacteria. The findings make the world aware of the existence of a very small life forms that eventually gave birth to the science of microbiology.

When In Europe, the microscope has been known since the 17th century and used to see animals similar microbes. Interestingly, the Japanese love to use them to observe small insects, and the result is the description of the books contains about insects in detail.