The Cell Theory

Events

The Invention of the Microscope

1590

Zacharias Janssen was a Dutch spectacle-maker. He is mostly known for making the first microscope.

Robert Hooke's Compound Microscope

1660

Robert Hooke's microscope had an oil lamp. It also had a lens that focused light from the flame onto the specimen.

The Anton van Leeuwenhoek Microscope

1674

Instead of buying a microscope, Leeuwenhoek made his own microscope. It looked nothing like the first microscope.

Schleiden, Schwann, and Virchow

1838

These three German scientists

The Modern Compound Light Microscope

1886

2 German scientists by the names of Ernst Abbe and Carl Zeiss made the compound light microscope with lenses that improved the image by a lot. A mirror would focus the light up through the specimen.

Transmission Electron Microscope

1933

A German physicist by the name of Ernst Ruska made the first electron microscope. This microscope can send electrons through a very thin specimen.

Scanning Electron Microscope

1965

This microscope can send electrons over the surface of a specimen instead of going through it. Then, you see that the result is a three- dimensional image of the surface of the specimen.

Scanning Tunneling Microscope

1981

This microscope can measure electrons that leak or 'tunnel' from the surface of a specimen.