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What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
Laguerre-Gaussian transverse mode patterns.
Bigger and better version created with the help of the Python script below
#!/usr/bin/env python
import sys
import Image
from math import *
from scipy.special.orthogonal import genlaguerre
size = 320
I_0 = 1.
w = size/4.
p = int(sys.argv[1])
l = int(sys.argv[2])
def linear_to_sRGB(l):
# Formula from http://www.w3.org/Graphics/Color/sRGB
if l <= 0.00304:
l = 12.92*l
else:
l = 1.055*pow(l,1.0/2.4) - 0.055
return 255.0*l
# First, let's make a floating-point image of the raw intensities.
raw = Image.new('F', (size,size))
high = 0
for x in range(1, size, 2):
for y in range(1, size, 2):
r = hypot(x,y)
phi = atan2(x,y)
rho = 2*r**2/w**2
I = I_0 * rho**l * (genlaguerre(p,l)(rho))**2 \
* (cos(l*phi))**2 * exp(-rho)
if I > high: high = I
raw.putpixel((size/2+(x-1)/2,size/2+(y-1)/2), I)
raw.putpixel((size/2+(x-1)/2,size/2-(y+1)/2), I)
raw.putpixel((size/2-(x+1)/2,size/2+(y-1)/2), I)
raw.putpixel((size/2-(x+1)/2,size/2-(y+1)/2), I)
print 'row ' + str((x+1)/2) + ' of ' + str(size/2) + ' complete'
# Now, let's normalize them and export them as sRGB.
cooked = Image.new('L', (size,size))
for x in range(size):
for y in range(size):
I = raw.getpixel((x,y))/high
cooked.putpixel((x,y), linear_to_sRGB(I))
print 'row ' + str(x+1) + ' of ' + str(size) + ' complete'
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{{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|Laguerre-Gaussian transverse mode patterns. Bigger and better version created with the help of this Python script: #!/usr/bin/env python import sys import Image from math import *
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):