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Dutch lens grinders Hans and Zacharias Janssen make the first microscope by placing two lenses in a tube.
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Dutch lens grinders Hans and Zacharias Janssen make the first microscope by placing two lenses in a tube.
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Galileo Galilei develops a compound microscope with a convex and a concave lens.
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Robert Hooke studies various object with his microscope and publishes his results in Micrographia. Among his work were a description of cork and its ability to float in water.
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Anton van Leeuwenhoek uses a simple microscope with only one lens to look at blood, insects and many other objects. He was first to describe cells and bacteria, seen through his very small microscopes with, for his time, extremely good lenses.
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Joseph Jackson Lister reduces the problem with spherical aberration by showing that several weak lenses used together at certain distances gave good magnification without blurring the image.
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Richard Zsigmondy develops the ultramicroscope and is able to study objects below the wavelength of light.
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Frits Zernike invents the phase-contrast microscope that allows the study of colorless and transparent biological materials.
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Ernst Ruska develops the electron microscope. The ability to use electrons in microscopy greatly improves the resolution and greatly expands the borders of exploration.
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Gerd Binnig and Heinrich Rohrer invent the scanning tunneling microscope that gives three-dimensional images of objects down to the atomic level.