Laser Microphones

dimanche 30 mars 2014

I have been trying to write the mathematical simulation for this device but unfortunately I found no clue to start with .

the simulation should be starting with the Gaussian beam equation of the laser source and then the vibrations in the glass pane cause the window to flex, changing the center of curvature of the window, thereby causing the "focal length(=measure of how strongly the system(glass) converges or diverges light) of the window to change, albeit very slightly. This creates a varying divergence and converges in the reflected laser beam which then can be directed to a photo diode causes the voltage across the detector to fluctuate.

I'm really desperate for a mathematical simulation for this process.





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