Schlieren Imaging
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Uploaded by goodmanjwheaton on Jan 22, 2009
A video showing a Schlieren imaging system, which allows the user to see moving air currents. Includes an explanation of how it works, and demonstrations of air motion near a hot plate, cold pack, a bare hand, a soda bottle, and a blowtorch.
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Uploader Comments (goodmanjwheaton)
All Comments (9)
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le CFP ca pue.
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I remember a schlieren setup that had two nice 16 inch parabolic mirrors to have a parallel beam of light going through the test area. Why do you use only one mirror? I can also tell your schlieren system is way more sensitive than the one I used. I had to rub my hands together to see the same effect. Also, why is the image not uniform (right side of the image darker than the left)? Is this an issue related to the knife-edge? Thanks for posting the video! Sorry for all the ?s, I'm a bit curious
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Can you please explain to me what the knife edge does exactly? To me the knife just makes the image half as bright? I dont understand why its placement to block some of the light rays, makes the camera more sensitive to see the variations in density?
also could i use any old camera to do this at home?
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Whre do you get this kind of system?
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Very good! Five stars!
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Very good. You can be my virtual Physics lab. I was wondering if you could duplicate my air bending / acoustic levitation experiment / feat and see what, if any vortices are forming. watch?v=ssZ1cq1uXls
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@musamoussi: The two mirror setup does help to avoid the double-vision effect you sometimes see here, but I only had the one mirror. The shading from right to left is caused by having the knife edge slightly ahead or behind the focal point: I didn't adjust it carefully enough.
goodmanjwheaton 11 months ago
@apball1223 -- the diagram at 1:20 helps to explain the knife edge. If there's no disruption of the light beam, the knife edge cuts out half the light, but where the light rays are bent by warm or cold air, more or less than half the light will get past the knife edge, making parts of the image brighter or darker. You can use any old camera to do this: the hard part is getting a big perfect parabolic mirror.
goodmanjwheaton 1 year ago