- #1
Tibo123
- 6
- 0
Hello,
My name is Thibaut, I am a student in physics and I currently struggling with something that some of you might find obvious.
I did an experiment with a laser 650nm passing through a 2D squared grid. The light interferes and diffracts and a photomultiplier collect only the central spot of the diffraction pattern 1m away from the grid. We progressively deposit on the bars of the grids a material that blokes the light and makes the holes of the grids look gradually smaller. We see a decrease in the light intensity collected at the photomultiplier. The intensity of the light decreases with x^4, where x is the size of the hole. I would like to be able to show numerically that trends.
I have tried a few things already but without any success. I am currently making the 2D FT of the pattern of the grid but while the holes shrink, I only observe a x^2 trend. I wonder if it is possible to include in my calculation the beam but I don't know enough about FT to tell.
I am opened to your suggesting,
Best Regards,
Thibaut
My name is Thibaut, I am a student in physics and I currently struggling with something that some of you might find obvious.
I did an experiment with a laser 650nm passing through a 2D squared grid. The light interferes and diffracts and a photomultiplier collect only the central spot of the diffraction pattern 1m away from the grid. We progressively deposit on the bars of the grids a material that blokes the light and makes the holes of the grids look gradually smaller. We see a decrease in the light intensity collected at the photomultiplier. The intensity of the light decreases with x^4, where x is the size of the hole. I would like to be able to show numerically that trends.
I have tried a few things already but without any success. I am currently making the 2D FT of the pattern of the grid but while the holes shrink, I only observe a x^2 trend. I wonder if it is possible to include in my calculation the beam but I don't know enough about FT to tell.
I am opened to your suggesting,
Best Regards,
Thibaut