Here’s some exciting potential for the astrophotography and/or science enthusiasts out there. NASA has announced they have been experimenting with different types of Schlieren based photography techniques to help them photograph things we typically can’t see, such as air density gradients and, in this case, supersonic schockwaves left behind by a moving aircarft. [Read more…]
This is pretty awesome. Scientists at Harvard Science Demonstrations put out a video earlier this year that let’s us see air moving with our naked eye. The team assembled some Schlieren optics (which we’ve talked about before) by reflecting a light source from a concave mirror onto a razor blade. The optics are setup in front of a camera to record as they demonstrate the process with a hair dryer, an air filled helium balloon, and a big glass full of sulfur hexafluoride gas. You can get a preview of the setup in the image above, but be sure to watch the video for the full effect, especially if you’re not familiar with Schlieren. [Read more…]
Okay, Schlieren photography is still pretty awesome. I’m actually still quite fascinated with our ability to photograph sound waves. I also love that I can do it myself for less than $10. But, this project announcement from MIT is pretty wicked, too. Scientists from Microsoft, MIT, and Adobe have developed a way to use similar science to recover the audio from images taken using high speed cameras and even a prosumer level DSLR.