A brief history of microscopy by i-heart-histo
The Chinese use water microscopes made of a lens and a water filled tube to better visualize smaller objects.
Hans Jansen and his son Zacharias Jansen invent the compound microscope.
Galileo Galilei develops a compound microscope with a convex and concave lens. Calling it the occhiolino - the little eye.
The term ‘microscope’ is coined by Giovanni Faber of Bamberg, an anology with the word ‘telescope’
Robert Hooke publishes Micrographia and coins the word ‘cell’ after his examination of cork bark.
Anton van Leuwenhoek develops the compound microscope to optimize it for observing biological specimens.
Ernst Abbe discovers the Abbe sine condition for manipulating the axis of optical systems to improving sharpess of images. This breakthrough in microscope design was exploited by microscope manufacturers Zeiss and Leitz resulting in a microscope boom.
Olympus manufacture their first microscope - the Asahi.
The Olympus DF Biological Microscope becomes the first microscope to feature an attached light source rather than a mirror that reflects light on the specimen.
The popular CH series of Olympus microscopes appear in universities and colleges around the world. Chances are your college still uses these lab teaching scopes (or the slightly newer CH2 version).
Introduction of a unique Y-shaped design for the microscope body for enhancing optics.
Confocal and virtual microscopy are now common place.
Fighting the scourge of mental illness means giving psychiatry the kind of boost that physics got from the Higgs hunt
(Image: Andrzej Krauze)
The sun emitted a mid-level solar flare, peaking at 1:32 pm EDT on May 3, 2013. Solar flares are powerful bursts of radiation.
Harmful radiation from a flare cannot pass through Earth’s atmosphere to physically affect humans on the ground, however — when intense enough — they can disturb the atmosphere in the layer where GPS and communications signals travel. This disrupts the radio signals for as long as the flare is ongoing, and the radio blackout for this flare has already subsided.
This flare is classified as an M5.7-class flare. M-class flares are the weakest flares that can still cause some space weather effects near Earth.
Increased numbers of flares are quite common at the moment, as the sun’s normal 11-year activity cycle is ramping up toward solar maximum, which is expected in late 2013.
Sun’s quiet corona
This image taken by the Solar Dynamics Observatory’s Atmospheric Imaging Assembly (AIA) instrument at 171 Angstrom shows the current conditions of the quiet corona and upper transition region of the Sun.
Image credit: NASA/SDO
IBM Atomic Shorts: History of the scanning tunneling microscope (by IBM)
Moving Atoms: Making The World’s Smallest Movie (by IBM)
A Boy And His Atom: The World’s Smallest Movie (by IBM)
It’s almost like they’re RIGHT HERE.
Don’t you tell me to shush, Chuck. We have a lot to talk about. I have so many questions.
This is a hippocampal neuron (read about hippocampus here) infected with GFP and DsRed ( the green+red combination is why it looks kind of orangey). You can really see all the different branches the dendrites have made to receive input from other neurons. Besides which, it looks absolutely stunning!
Forget about leprechauns, engineers are catching rainbows
University at Buffalo engineers have created a more efficient way to catch rainbows, an advancement in photonics that could lead to technological breakthroughs in solar energy, stealth technology and other areas of research.
Qiaoqiang Gan, PhD, an assistant professor of electrical engineering at UB, and a team of graduate students described their work in a paper called “Rainbow Trapping in Hyperbolic Metamaterial Waveguide,” published Feb. 13 in the online journal Scientific Reports.
They developed a “hyperbolic metamaterial waveguide,” which is essentially an advanced microchip made of alternate ultra-thin films of metal and semiconductors and/or insulators. The waveguide halts and ultimately absorbs each frequency of light, at slightly different places in a vertical direction, to catch a “rainbow” of wavelengths. Gan is a researcher within UB’s new Center of Excellence in Materials Informatics. “Electromagnetic absorbers have been studied for many years, especially for military radar systems,” Gan said. “Right now, researchers are developing compact light absorbers based on optically thick semiconductors or carbon nanotubes. However, it is still challenging to realize the perfect absorber in ultra-thin films with tunable absorption band. “We are developing ultra-thin films that will slow the light and therefore allow much more efficient absorption, which will address the long existing challenge.” (via Forget about leprechauns, engineers are catching rainbows)