Comments on: Shockwaves and High Speed Videography

By: Ville Lekholm

Ville Lekholm — Thu, 08 Jan 2009 16:47:26 +0000

Hi!

Fantastic write-up on schlieren photography! I was amazed by the images, and would be very interested to know more about the simulated schlieren. What is your source for that image?

Thank you!
/Ville

By: Rich

Rich — Tue, 09 Dec 2008 05:52:57 +0000

Absolutely amazing picture. The waves are invisible but I the heat and air make it detectable.

By: AirShowFan

AirShowFan — Mon, 08 Dec 2008 05:15:44 +0000

Shockwaves are completely invisible? I think not:

http://www.fencecheck.com/forums/index.php?action=dlattach;topic=12072.0;attach=225088;image

By: Rich

Rich — Mon, 14 Jul 2008 06:12:50 +0000

Patric, if you are dealing with bullet photography (video) you will need a camera that can capture 50,000 frames per second. If you can manage to get a camera that can do half that speed, your shot will be jerky. Seems like including a mirror would be a trippy shot, however I am not technical enough to begin to set that shop up. However if you are feeling up to it, read through MIT's bullet photography algorithms.

By: Patrickmckeown

Patrickmckeown — Mon, 14 Jul 2008 00:56:16 +0000

I have a question I hope you can answer. Suppose I have a video camera which is taking a film of a highly reflective surface (from above) I now fire a pistol some distance from the mirror and at a right angle to it. The bullet passes between the reflective surface and the video camera. If I now view the film I am aware that the bullet will be invisible..However (and this is the question) could any existing technology discern the path of the bullet by disturbance observed in the air particles( captured by the film) as the bullet moved across the gap between the surface and the camera