2008/8/8 Matthias Hillenbrand <[EMAIL PROTECTED]>:
> My Gaussian beam and the lenses have a diameter of approximately 2^16
> array elements while the total array has a size of 2^18. The absolute
> value of the Gaussian beam multiplied by the lenses converges to zero.
> Out of this reason I assume
Hello,
today I found time to do concentrate on the proposed zero padding.
My Gaussian beam and the lenses have a diameter of approximately 2^16
array elements while the total array has a size of 2^18. The absolute
value of the Gaussian beam multiplied by the lenses converges to zero.
Out of this
Hello,
> When you convolve two signals, of lengths N and M, you need to pad the
> FFTs to length (N+M-1) before multiplication.
> You can take a look at my linear position-invariant filtering code at:
> http://mentat.za.net/hg/filter
I understand your comments that I need zero padding when doin
2008/8/6 Matthieu Brucher <[EMAIL PROTECTED]>:
> Exactly. Using FFT to do a convolution should be done after some
> signal processing readings ;)
When you convolve two signals, of lengths N and M, you need to pad the
FFTs to length (N+M-1) before multiplication.
You can take a look at my linear p
ias Hillenbrand
> נשלח: ד 06-אוגוסט-08 05:26
> אל: numpy-discussion@scipy.org
> נושא: [Numpy-discussion] Horizontal lines in diffraction image (NumPy FFT)
>
> Hello,
>
> I am trying to calculate the propagation of a Gaussian beam with an
> angular spectrum propagation algo
-
מאת: [EMAIL PROTECTED] בשם Matthias Hillenbrand
נשלח: ד 06-אוגוסט-08 05:26
אל: numpy-discussion@scipy.org
נושא: [Numpy-discussion] Horizontal lines in diffraction image (NumPy FFT)
Hello,
I am trying to calculate the propagation of a Gaussian beam with an
angular spectrum propagation algorithm
Hello,
I am trying to calculate the propagation of a Gaussian beam with an
angular spectrum propagation algorithm.
My program does the following steps:
1. Generation and multiplication of the Gaussian beam, an aperture,
and a lens -> u
2. FFT(u)
3. Multiplication of FFT(u) with the angular spectru
