![How to Capture Heat on Camera Without Expensive Optics](http://petapixel.com/assets/uploads/2018/02/Paige-candle-cropA-DIFF-B-683x800.jpg)
Standard schlieren imaging techniques use a large mirror to be able to visualize heat or pressure differences in air. The problem with these techniques is that they require large precision telescope mirrors that are very expensive.
My lab is fortunate to have a 13-inch diameter telescope mirror; but what happens when I need to photograph […]. petapixel.com
2018-2-6 20:49