Dual holographic interferometry for measuring the three velocity components in a fluid plane
Related Experiment Video
Updated: Aug 23, 2026

High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
Julia Lobera1, Nieves Andrés, M Pilar Arroyo
1Instituto de Investigación e Ingeniería de Aragón (I3A), Facultad de Ciencias, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain.
Abstract:
A technique that allows one to measure simultaneously the three velocity components in a fluid plane is presented. One obtains the quantitative information from only one holographic recording by combining two different reconstruction processes. As both processes use an interferometric comparison of two waves, we refer to this technique as dual holographic interferometry. The far-field fringe pattern that is obtained when reconstruction is made with an expanded laser beam allows one to determine the in-plane velocity components. The image-field fringe pattern that is obtained when a pointwise laser beam is used for reconstruction contains information about an out-of-plane velocity component. As the two reconstruction processes have different sensitivities, two different ways to combine them are proposed. The system has been demonstrated in a fluidlike solid object and in a convective flow.
Related Concept Videos
Measurement of Fluid Pressure
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
Accelerating Fluids
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
Uniform Depth Channel Flow
Fluid Pressure over Curved Plate of Constant Width
Velocity and Acceleration in Steady and Unsteady Flow
The acceleration can be generalized to any point in the flow, and expressed as components along three perpendicular directions, representing changes in velocity over time.
Pressure Variation in a Fluid at Rest
When measuring pressure at two different levels within the fluid, the difference in pressure...

