If someone is pointing a Laser beam on the cockpit of a small low flying aircraft, what kind of hardware can be deployed near the windshield to deflect it?
As mentioned by others, the issue is that lasers are light. If you block too much light, you can't see out. OTOH, one key feature of lasers are that they operate at specific frequencies, so one solution is a spectral filter that blocks the frequencies used by the most common lasers. (This technology has been around for about 30 years.) Integrating the filters into a windscreen would be very expensive. Using film would likely have certification and maintenance issues, so it's not really practical for a windscreen installation. A better solution is for pilots to wear laser-protective eyewear containing lenses with the appropriate filtering.
Laser light is light: if you deflect the laser, you also deflect other light sources, hence you effectively blind the pilot.
You have then achieved the result of reducing the field of vision of the pilot.
To address your comment.
but that would be momentarily but the laser beam can actually blind the pilot completely or can create injury. So, i feel may be deflection is a better idea as it will deflect light only for some time..
how? laser travels at the speed of light, what are you trying to achieve? Blocking the light before it reaches the pilot? Blocking it afterwards? (for a pilot to be blinded, a few milliseconds are enough, given a powerful enough laser source)
Since the above seems not to be clear enough, I will try to express this in other words.
No matter the method of your choosing, laser light travels at the speed of light: by the time you detect it, and then block (or reflect, diffuse, selectively filter) it, the pilot might be already blinded.