- #1
zimbabwe
- 35
- 0
I'm really having trouble understanding how holograms work in a good enough way to explain it. I know it captures an interefernce pattern of two incoming waves in the form of a complicated diffraction grating. When the reference beam shines on to the plate the original object is created. But that really isn't clear.
So using 2 coherent beams of light with a ration of 1:4 and an angle of incidence 30 degrees different apart onto a holographic plate, is like adding 2 sin waves onto the plate. When I play the plate back using a laser I get three points. One in the center and two on either side. I was told this is a Fourier transform, can someone show me how do it with maths so it makes some sense, or explain what exactly is going on.
Thank a lot
So using 2 coherent beams of light with a ration of 1:4 and an angle of incidence 30 degrees different apart onto a holographic plate, is like adding 2 sin waves onto the plate. When I play the plate back using a laser I get three points. One in the center and two on either side. I was told this is a Fourier transform, can someone show me how do it with maths so it makes some sense, or explain what exactly is going on.
Thank a lot