Hi guys, I am thinking about building a laser microphone and found quite a bit of sites and videos on google about it but most of them are the angular solutions there is also this bounce back solution with beam splitter look here Fig 3.
I have a question about the beam bouncing, on the diagram laser is shown to be perpendicular to the window plane (in reality then it would have to be aligned along the normal vector of the plane of window) which makes sense, but it seems impossible to achieve in the reality.
I have looked into laser measures and seeing how they work on similar principle of bouncing the beam back and measuring time it travels in this case. I noticed on the videos that measurement can be taken at any angle, so it made me thinking that some of the light gets bounced back at the angle of 0 degrees same way it came from, Is this correct??
Sorry if my question seems very newbie but I have very little idea about lasers at this point.
I have a question about the beam bouncing, on the diagram laser is shown to be perpendicular to the window plane (in reality then it would have to be aligned along the normal vector of the plane of window) which makes sense, but it seems impossible to achieve in the reality.
I have looked into laser measures and seeing how they work on similar principle of bouncing the beam back and measuring time it travels in this case. I noticed on the videos that measurement can be taken at any angle, so it made me thinking that some of the light gets bounced back at the angle of 0 degrees same way it came from, Is this correct??
Sorry if my question seems very newbie but I have very little idea about lasers at this point.