PIV and Viaualisation

Litron Lasers designed for
PIV & Visualisation applications

Litron is the acknowledged leader in supplying lasers for PIV applications, ranging from lamp pumped Nd:YAG lasers in the 15 Hz to 200 Hz repetition rates range up to diode pumped Nd:YLF and Nd:YAG lasers giving kilohertz repetition rates for high speed applications.



PIV PIV Series Plasma 75 PIV Nano TRL PIV Series Bernoulli Series
Time Resolved PIV LD75-G PIV LDY PIV Series    
PLIF LPY PIV Series Nano TRL PIV Series Nano PIV Series Plasma 75 PIV
LIF LPY Series Nano TRL Series Nano Series Aurora II Integra
Holography LPY700G U Series LPY600 U Series    
ESPI LPY700G U Series LPY600 U Series    

>Click here to see a list of interesting scholarly papers written by researchers using Litron Lasers in many PIV applications.

Particle image velocimetry is a widespread technique for analysing fluid flows in gases and liquids. Typical application areas are in aerodynamics, hydrodynamics, combustion analysis and medical imaging, with flow velocities varying from centimetres per second to hypersonic.

Pairs of laser pulses, typically from a dual cavity Nd:YAG or Nd:YLF laser are formed into a sheet using light sheet forming optics to illuminate the area of interest. Particles within the flow field scatter light back to form an image on a camera and a computer with specialized PIV software analyses the images to create a two-dimensional flow field showing speed and direction at various points. Holographic or tomographic PIV techniques enable a three-dimensional image to be obtained.

Advances in camera design have enabled high speed PIV to become a reality for looking at very high velocity flow phenomena at frame rates of several kilohertz, requiring the use of high-speed lasers operating at up to 20 kHz.

For two-dimensional PIV, laser beam quality is an important consideration. Good spatial uniformity gives images that are clear and free from under or over exposed regions. Lasers with low divergence beams with corresponding low M2 values, even TEM00 can give thinner light sheets that extend over a larger image area than other lasers with higher divergence.

The most common PIV disciplines are listed above with links to the most appropriate Litron laser for that application.

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