I did some VERY UNSCIENTIFIC testing with a LS to how well they 'disperse' a laser...
I don't own a lidar gun, so I needed to find another way to check how much the LS dispersed a laser-beam.
All I did was the following:
I took a shiny CD case, and propped it so it would be completely perpendicular to the ground. I then made sure the room was dark. I took a regular 'laser-pointer' and at ~18inches away from the case I shined the pointers beam onto the CD case (at about a 45Degree angle) so the reflection would bounce back to the wall so I could take a picture on how 'concentrated' the beam was.
(In this instance the CD case replaces a License Plate, the laser pointer represents the Lidar gun, and the 'reflection of the beam' onto the wall would represent the lidar signature back to the lidar gun.)
Before LS was put in front of the CD case this is what 'reflected-back' to the wall: Representing the return signature to the lidar gun:
After LS was placed 'on' the CD-case... just how it would be over a LP, and this would represent the (much reduced) 'return signature' to the lidar gun:
Yes this is very unscientific... I know an LEO's gun is ~904nm, not mid-600's (Laser-pointer), has a different 'beam pattern', wouldn't (most likely) be at the angle in my set-up... etc etc I said this was unscientific, but its the best I could do without a Lidar unit, and it allows us to SEE the dispersion of a concentrated beam.
In conclusion: Yes its unscientific and there are lots of 'holes' in this 'testing', take it or leave it folks, just trying to think of new ideas to test the LS (with results we can see with the naked eye). These results are promising IMO to proving the effectiveness of the LS.