Edit

Miraculous microscopes: a brief history

It is impossible to imagine where cell biology would be without the invention of the light microscope. But what is now a complex network of lasers, optics and mechanics, started off as a simple brass plate, with a small glass sphere serving as an objective – while the only light needed was sunlight. And we have Dutch scientist Anton van Leeuwenhoek to thank for that.

Mesmerising microscopy: Imre Gaspar, staff scientist in the Ephrussi group at EMBL Heidelberg, imaged these Drosophila ovarioles using a Leica SP8 confocal laser scanning microscope

Back in 1673 van Leeuwenhoek, then a curious young trader, began to take an interest in lens making – and from there, microscopes. Developing his ingenuously simple contraption to zoom in on the micro-world, he stepped into a completely different dimension, discovering what he called “animalcules” – or as we know them today, microorganisms.

Fast-forward two centuries, and Carl Zeiss, struggling with his lens-making workshop, decided to switch to microscope making. A collaboration with physicist Ernst Abbe provided the spark for microscopy to take another giant leap. Abbe postulated the Abbe sine condition, which had to be fulfilled by a lens to produce sharp, undistorted images. Calling in glass chemist Otto Schott, the trio put their heads together to design and build the first apochromatic objective – a powerful device allowing clearer images with minimal colour distortion – lenses that are still used in science today.

Developing his ingenuously simple contraption to zoom in on the micro-world, he stepped into a completely different dimension.

Abbe’s astonishing contribution to microscopy did not stop there. Crucially, he also defined the theoretical resolution limit of the microscope – roughly 100 times smaller than a human cell. This resolution limit held up for more than a century, until Stefan Hell, Eric Betzig and William Moerner smashed through the diffraction barrier to make super-resolution microscopy a reality.

Tags: microscopy, Science and Society

More from this category

Picture of the week

To study the effect of commonly used drugs on bacterial envelopes, EMBL scientists applied a biochemical assay using a colour reaction. The deeper the red, the stronger the disruptive effect of the drug.

By  Marius Bruer

A metal rack holding glass test tubes with yellow and red solutions in them.

EMBLetc.

Read the latest Issues of our magazine - EMBLetc.

Looking for past print editions of EMBLetc.? Browse our archive, going back 20 years.

EMBLetc. archive
Edit