high speed photography

[Bruce Watson]

This is about as far from LF as it gets. Slow and contemplative it's not. But at six million exposures per second (http://news.bbc.co.uk/2/hi/science/nature/8025211.stm) it sure is fast. Since LFers are often gear heads as well (at least I am) I thought this might be interesting to a fair number of people here.

[Dan Fromm]

Its a little odd that they compare their new trick with what video cameras can do, not with ultra high speed cine cameras. Here http://www.iop.org/EJ/abstract/1063-7869/37/7/A05 is a reference to a biography of a Soviet physicist who, it claims, developed a cine camera that ran at 33,000,000 fps. One has to wonder how he lit such short exposures.

Bruce, the laser with cute optics device you pointed us at has several intriguing aspects. They claim it can run for, in effect, quite a while. And it need not be limited by illumination problems since it makes its own light.

I suppose that the rogue cell finding application they mention will require the same kind of image processing techology used to find rare events in scintillation chambers.

[redrockcoulee]

In my previous position we had a demostration of a camera capable of 1 million frames per second however the cameras we used could only go up to 400 000 but in real life we only using went as high as 12000. But it takes longer to set up for a shot with high speed than with a large format.

We lite our exposures with explosions. They tend to give off a fair amount of light :) Often the problem could be too much exposure. And sometimes too much shrapnel that cut the power line and we would lose the recording. There is a change in mindset that one must do when you record less than a second of video and need to edit out over half of it cause the action occurred only in the centre of the time frame. 300 millisecs was plenty long.