Dear Godfrey Gakingo ,
Nd:YAG lasers, commonly used in PIV setups, emit primarily at 1064 nm wavelength and its harmonics (532, 266, etc.) For safety reasons, the laser emission is typically bandpass filtered to isolate the 532 nm harmonics (this is green light, the only harmonic able to be seen by the naked eye.
For more information please refer to the link:https://en.wikipedia.org/wiki/Particle_image_velocimetry
Best wishes
lasers, such as Argon-ion laser and Nd:YAG laser, are widely used as light source in PIV systems due to their ability to emit monochromatic light with high energy density which can easily be bundled into thin light sheet for illuminating and recording the tracer particles without chromatic aberrations.
Thank you for the answers so far. Dear Abdelhalim abdelnaby Zekry , if the laser source available emitted red light as opposed to green light, would the experiment still work?
Dear Godfrey Gakingo ,
You can try the red laser light. It is also visible as the green light. But the eye sensitivity is less for the red light. The eye has its highest sensitivity for the green light. So, the resolution capability will be lower. What I said here is only expectations and you have to try it and see how far It may be suitable for such an application.
Best wishes
Hello everyone, I'm sorry I don't have an answer. Instead, since this thread is about PIV, I would like to let you know that we've started a Flow visualization Stack exchange forum. We are building a community currently. Once we have 60 people we will be allowed to proceed to a private beta version of the forum. Please join us if you are interested in flow vis and have questions to ask. Here's the link: https://area51.stackexchange.com/proposals/127312/flow-visualization?referrer=NTJlZjIyYzI3Zjk4N2I1NDZmMTJhZDUxMTViODcwMWUyNTM4OTI1YTU1OTYxN2ZkNDcwY2U2ZWI5NmU2OTY5OGhTtnNa4jEjFBFgB4o_K-u-LTdCqWX8yd8vul6HHcUb0
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