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Jan 1, 1214
Roger Bacon Writes About the Concept of Lenses
Bacon, a monk in Oxford, wrote on the topic of nature and often refrenced the concepts and use of lenses. -
Jan 1, 1285
Invention of Spectacles
Salvano d'Areamento degli Amati of Florence has a statement on his grave stating that he invented the spectacles. -
Invention of the Microscope
William Boreel and Zacharias Jansen are the inventors of the micrscope. At first, it could only be used for opaque objects and had a magnification of 20X -
Invetion of The Telescope
The telescope was invented by James Adriaanzoon (James Metius) in 1608. -
Robert Hook Publsihes "Microgphia"
It was a folio of 38 copper plate illustrations of objects drawn with the aid of his microscope. He was the first to describe and name the term "cell". -
Anthony van Leeuwenhoek Discovers Important Biology Information
He discovered bacteria, free-living and parasitic microscopic protists, sperm cells, blood cells and more. He had a device that magnified up to 300X. -
Discovery of Plant Cells
Matthias Jakob Schleiden was the first to recognize that all plants, and all the different parts of plants, are composed of cells. -
Discovery of Animal Cells
Theodor Schwann was the first to discover animcal cells at the same time that plant cells were disovered by Schleiden. -
Achromatic Lenses Introduced
Achromatic lenses introduced now provide resolution of 1 micron or 1/1000mm. -
Cell Theory
Theodor Schwann and Matthias Schleiden formally propose the "cell theory". -
First Micrographs
Donne' publishes the first micrographs in France. -
More Cell Theory Work
Rudolf Virchow exteneded the work of Schwann and Schleiden by discovering that all living cells must rise from pre-existing cells. -
Abbe's Theory
He made the clear difference between magnification and resolution and criticized the practice of using eye pieces with to high a magnification as "empty magnification". -
Revolving Mount (Turret)
Ernst Leiz microscope is introduced with a revolving mount for 5 objectives. -
Mitosis
Walther Flemming discovers mitosis. -
Microscope Lamp
August Kohler had worked out a light source and condenser position to obtain the best image projection. -
Apochromatic Objective
Ernst Abbe designs apochromatic objective lens that brings red, yello and blue into one focus. -
First Commercial UV Microscope
The first commercial UV microscope was made by Zeiss. The resolution based on Abbe's formula is twice that of a visible light microscope. -
Action of Lens is Described
A writing describing the action of the lens appears in the Arabian Alhazen.
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