I know that wind tunnel testing will use lasers to track velocity by incorporating a seed material, a very fine material that can closely follow the fluid flow. One version of it is called DPIV (Digital Particle Image Velocimetry). And if you know velocity and are willing to make some assumptions, you can get pressure and density from this.
If this isn’t what your referring to, another is a Laser Barometer. Uses laser radiation to sense the change in a gas’ refraction index. This can give you atmospheric pressure.
Schlieren photography is another good example of using light to determine the density gradients of a fluid flow. This one I don’t think is technically lasers.
jayprints t1_je2cyo2 wrote
Reply to How do laser measurement tools work? by Ninjewdi
I know that wind tunnel testing will use lasers to track velocity by incorporating a seed material, a very fine material that can closely follow the fluid flow. One version of it is called DPIV (Digital Particle Image Velocimetry). And if you know velocity and are willing to make some assumptions, you can get pressure and density from this.
If this isn’t what your referring to, another is a Laser Barometer. Uses laser radiation to sense the change in a gas’ refraction index. This can give you atmospheric pressure.
Schlieren photography is another good example of using light to determine the density gradients of a fluid flow. This one I don’t think is technically lasers.