Il n'y a qu'une seule description en anglais
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requires c.basic

I plan to write a program which calculates the diffraction pattern of optical aberrations in lenses. At the first step I played around with the mathematics and physics with the much simpler diffusion at a slit.
Variables:
D - distance slit-screen
l - wavelength
b - slith width (all that im metres)
Y - place at the screen
y - place at the slit
R - lenght of the central path
r - length of the path at the current place in slit
s - path difference of the wave in relation to the central one
a - amplitude of the wave for summation

The program superimposes wavelets form 10 points at the slit. I used the very easy to understand geometrical method. The path difference is calculated directly. This may be lead to numerical problems because R and r are nearly equal. Therefor, I give additional the first element of y Taylor series for that. Both ways work.

requires c.basic

I plan to write a program which calculates the diffraction pattern of optical aberrations in lenses. At the first step I played around with the mathematics and physics with the much simpler diffusion at a slit.
Variables:
D - distance slit-screen
l - wavelength
b - slith width (all that im metres)
Y - place at the screen
y - place at the slit
R - lenght of the central path
r - length of the path at the current place in slit
s - path difference of the wave in relation to the central one
a - amplitude of the wave for summation

The program superimposes wavelets form 10 points at the slit. I used the very easy to understand geometrical method. The path difference is calculated directly. This may be lead to numerical problems because R and r are nearly equal. Therefor, I give additional the first element of y Taylor series for that. Both ways work.