Zacharias janssen biography information about marketing

The family had to move to Arnemuiden in after Zacharias's counterfeiting activities were exposed. There Zacharias was again accused of counterfeiting incausing him to be on the move again, ending up back in Middelburg in A year after the death of Janssen's first wife inhe married Anna Couget from Antwerp, who was the widow of a Willem Jansen probably a relative of Janssen.

He moved to Amsterdam in November with a profession of a spectacle maker, but was bankrupt by Janssen has been given a death date as late as although his sister said he was dead in testimony and his son Johannes declared his parents had died by the time of his marriage in April Zacharias worked for some time in the very competitive and secretive trade of spectacle-making and at one time lived next door to Middelburg spectacle maker Hans Lippersheywho is also claimed to have invented the telescope.

Janssen's attribution to these discoveries is debatable since there is no concrete evidence as to the actual inventor, and there are a whole series of confusing and conflicting claims from the testimony of his son and fellow countrymen. The claim that Zacharias Janssen invented the telescope and the microscope dates back to the year During that time Dutch diplomat Willem Boreel conducted an investigation trying to figure out who invented the telescope.

He had a local magistrate in Middelburg follow up on a 45 year old recollection of a spectacle maker named "Hans" who told a young Boreel in about inventing the telescope. In his investigation the magistrate was contacted by a then unknown claimant, Middelburg spectacle maker Johannes Zachariassen, the son of Zacharias Janssen, who testified under oath that his father invented the telescope and the microscope as early as and that Hans Lippershey had stolen his father's invention of the telescope.

This testimony seemed convincing to Boreel, who modified his recollections, concluding that Zacharias must have been who he remembered. Boreel's conclusion that Zacharias Janssen invented the telescope a little ahead of spectacle maker Hans Lippershey was adopted by Pierre Borel in his book on the subject. A year after the death of Janssen's first wife inhe married Anna Couget from Antwerp, who was the widow of a Willem Jansen probably a relative of Janssen.

He moved to Amsterdam in November with a profession of a spectacle maker, but was bankrupt by Janssen has been given a death date as late as [ 3 ] although his sister said he was dead in testimony [ 7 ] and his son Johannes declared his parents had died by the time of his marriage in April Zacharias worked for some time in the very competitive and secretive trade of spectacle-making and at one time lived next door to Middelburg spectacle maker Hans Lippersheywho is also claimed to have invented the telescope.

In his investigation the magistrate was contacted by a then unknown claimant, Middelburg spectacle maker Johannes Zachariassen, the son of Zacharias Janssen, who testified zacharias janssen biography information about marketing oath that his father invented the telescope and the microscope as early as and that Hans Lippershey had stolen his father's invention of the telescope.

In Boreel's investigation Johannes also claimed his father, Zacharias Janssen, invented the compound microscope in For this to be true Zacharias most likely dates of birth would have made him 2—5 years old at the time some historians concluded grandfather Hans Martens must have invented it. Other claims have come forward over the years.

Physicist Jean Henri van Swinden 's investigation reached the conclusion supporting Janssen and in a collector named Zacharias Snijder came forward with 4 iron tubes with lenses in them purported to be Janssen original telescopes. The confusion surrounding the claim to invention of the telescope and the microscope arises in part from the sometimes conflicting testimony of Zacharias Janssen's son, Johannes Zachariassen.

Johannes' various claims include that his father invented the telescope inthat his father invented the telescope inthat in he and his father invented the Keplerian telescope a design using two positive lenses proposed by Johannes Kepler inand that Adriaan Metius and Cornelis Drebbel bought a telescope from him and his father in and copied it.

The investigation by William Boreel who may have been a childhood friend of Zacharias Zachariassen added to the confusion over invention. The people he had the local magistrate interview were trying to recount details 50 or 60 years after the fact and Boreel may have confused the names of spectacle makers from his childhood. He may have also been confused about a microscope built by another optician for Drebbel, claiming it was built by Zacharias Janssen.

An investigation begun in in preparation for a memorial to commemorate Janssen as the inventor of the telescope and microscope turned up further problems with the claim including the Lippershey and Metius patent applications, Janssen late date of birth, and no record of him being a spectacle maker before In the years —, Janssen was tried several times for counterfeiting coins.

Despite this, it is considered that Janssen may have been the manufacturer of the single-lens and two-lens microscope. Furthermore, he came from a lens-making family. The first is classified as a simple microscope, while the other is called a compound. According to questionable sources, the elaboration of the artifact is dated tobut data was also found indicating that the manufacture was in During this period, Zacharias was trying to get even higher magnification of lenses, in order to help people with bad eyesight.

The images captured by these primitive microscopes were quite poor, showing only a small fraction of the observed object. In order to carry out the examination, it was necessary to use lamps, whose transfer made it difficult to observe the specimens. Following the invention of Zacharias Janssen, in a short period of time a remarkable number of designers began to emerge throughout the West.

It is said that the first improvement made to this device consisted of increasing the number of lenses used, going from 2 elements to 3, a configuration that is maintained by current standard microscopes. For his part, Robert Hooke strove to make more effective lenses that could facilitate scientific research, but the results were not entirely satisfactory.

Later, in the 18th century, John Marshall was in charge of perfecting the mechanical design of the microscope. However, the quality of the lenses was still poor. Notable advances in optical systems and microscopy as a science could not be made until the 19th century. Another of the inventions attributed to Zacharias Janssen is the telescope, since its first appearance is dated in the Dutch country.

However, in that same year the inventor Hans Lippershey submitted the zacharias janssen biography information about marketing request for said device. This is known thanks to the fact that in Cornelis de Waard found the marriage certificate of this inventor. Later, inthe Janssen family had to move to the city of Arnemuiden, located on the island of Walcheren, due to Janssen's legal problems.

A year later Zacharias was again accused of counterfeiting coins, for which he had to flee for the third time, this time for Middleburg, where he arrived in After the death of his first wife in Janssen remarried, this time to Anna Couget of Antwerp, who was the widow of a relative of Zacharias. In Janssen decided to move to the city of Amsterdam in order to practice the profession of polisher and manufacturer of lenses; however, he was unsuccessful and went bankrupt in After this date, no more records of the life of this inventor are kept until the year of his death.

At present, the claim that Zacharias Janssen was the inventor of the microscope is debatable, since there is no concrete evidence regarding this data. On the contrary, the only thing that could be recorded in the documents found were somewhat contradictory and at the same time confusing statements, which date from and Despite the confusion generated by the little data found, it is considered that Janssen may have been the manufacturer of the microscope for a single lens, as well as that of two lenses.

The first is classified as a simple microscope, while the other is called a compound.

Zacharias janssen biography information about marketing

Janssen's invention, which he made with the help of his father, consists of nine magnifications. According to questionable sources, the manufacture of the artifact is dated tobut data were also found indicating that the manufacture was in During this period Zacharias tried to achieve an even higher magnification of lenses, in order to help people with very poor eyesight.

Since the beginning of human history, man has tried to invent different methods to increase the visual perception of objects in order to find out or learn more about the characteristics of these elements. As man evolved in his discoveries, he realized that the answer was found in the refined compound of the glass. Two thousand years ago the Romans noticed that by means of a glass sphere, sunlight could be converged; However, it was not until the end of the 16th century that the magnification of lenses was discovered, allowing its application in the study of botany and zoology.

Before the invention of the microscope, the smallest living things that man had been able to visualize were insects; After the arrival of glasses and this invention, a profound epistemological change occurred in the history of humanity, as a whole world of microorganisms that inhabit everything that surrounds man was discovered. In Galileo Galilei had already used devices similar to the telescope, which he used for his important and revealing astronomical studies.

In the first decades of the seventeenth century, the use of glasses was becoming one of the most important mechanisms for scientific research and for the improvement of health. Starting in the 17th century, microscopes began to be built; however, these lacked accuracy and in many cases exceeded the stature of the person who was going to use them.

In addition to Zacharias Janssen, there was also another Dutchman who was in charge of manufacturing lenses for use in the development of microscopy; this character was named Anton Van Leeuwenhoek. Contrary to Zacharias, Anton Van Leeuwenhoek was in charge of recording his observations, making detailed sketches and taking notes on those tiny beings that he could visualize moving within the stagnant waters that he collected for his investigations.