In fluid mechanics we use a stroboscopic technique called Particle Image Velocimetry. The basic idea is a pulsed laser sheet illuminates a slice of a flow seeded with aerosol and we track the particles with a camera to capture the flow field. There is also stereo PIV where we exploit the scheimpflug effect to focus add axes two cameras to obtain three velocity components in a 2D slice.
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In fluid mechanics we use a stroboscopic technique called Particle Image Velocimetry. The basic idea is a pulsed laser sheet illuminates a slice of a flow seeded with aerosol and we track the particles with a camera to capture the flow field. There is also stereo PIV where we exploit the scheimpflug effect to focus add axes two cameras to obtain three velocity components in a 2D slice.