22 total contributions since 2012

MOHD ABDUL GAFFAR

IITG

Professional Interests: Optical image processing

Question

How to calculate the area of dark core of intensity distribution at Full width at half maximum?, which has ring like structure.

Hello sir, I have to calculate the area of dark core of intensity distribution at Full width at half maximum, which has ring li...

11 months ago | 1 answer | 0

Question

How to stop for loop if E approximately = 0.8.?

clc; clear all; close all; [x,y]=meshgrid(-1:2/128:1); circ=(x.^2+y.^2)<1; A=ones(129,129); B=A.*circ; a1...

4 years ago | 1 answer | 0

Question

I have intensity image , how to find half energy width of image.

<</matlabcentral/answers/uploaded_files/43267/a=0,linear.png>>

4 years ago | 1 answer | 0

Question

How can I draw poincare sphere using stokes parameters?

How can I draw poincare sphere using stokes parameters

5 years ago | 0 answers | 0

Question

How to implementation DFT (discrete fourier transform) to intensity?

Here I am trying to calculate intensity of Xpolarized light by using DFT (discrete fourier transform) instead of fft, by us...

5 years ago | 1 answer | 0

Question

How to calculate Discrete Fourier transform of a matrix by numerically?

Here I am able write code to find out DFT of array numerically with out using for loop(2 nd for loop), I am facing problem to f...

6 years ago | 0 answers | 0

Question

How to select matrix elements along aritrary angle i.e (Any angle between 0 and 90 degree except 0,90,45 deg ) ?

# clear all; # clc; # close all; # [kx,ky]=meshgrid(-1:2/21:1); # # circ=sqrt(kx.^2+ky.^2)<1; # alp=asin(0.95); # # ...

6 years ago | 1 answer | 0

Question

how we can create movie from the following program?

clear all; clc; close all; dim=32; [kx,ky]=meshgrid(-3:6/(dim-1):3); circ=sqrt(kx.^2+ky.^2)<1; r=sqrt(kx.^2+ky...

7 years ago | 1 answer | 0

Question

How we can display images at different times by using for loop instead of following program and how we can make movie from following program?

clear all; clc; close all; dim=32; [kx,ky]=meshgrid(-3:6/(dim-1):3); circ=sqrt(kx.^2+ky.^2)<1; r=sqrt(kx.^2+ky...

7 years ago | 0 answers | 0

Question

How we can display images at different times by using for loop instead of following program and how we can make movie from following program?

# clear all; # clc; # close all; # dim=32; # [kx,ky]=meshgrid(-3:6/(dim-1):3); # circ=sqrt(kx.^2+ky.^2)<1; # r=sqrt(kx.^2+...

7 years ago | 1 answer | 0

Question

how to increase magnification of images 2,3,4?

clear all; clc; close all; dim=32; [kx,ky]=meshgrid(-1:2/(dim-1):1); circ=sqrt(kx.^2+ky.^2)<1; alp=asin(0.95);...

7 years ago | 1 answer | 0

Question

How to perform integral ?

clear all; clc; close all; dim=64; L=531*10^-9; k=2*pi/L; [x,y]=meshgrid(-L:2*L/(dim-1):L); r=sqrt(x.^2+y.^...

7 years ago | 0 answers | 0

Question

How to find out the position matrix from Intensity matrix?

Hi sir, I sending following program by using this I am finding intensity in the focal plane for an X-polarized (linearly po...

7 years ago | 0 answers | 0

Question

How to replace a matrix element

Hi, I am having a particular problem in the foll matrix: A=[-1 1 0 0 0; 0 -1 1 0 0; 0 0 0 -1 1; -1 1 0 0 0]...

7 years ago | 1 answer | 0

Question

How to plot poynting vector profile by using electric and magnetic filed components ?

HERE I AM ADDING CODE here I have to plot Quiver plot for poynting vector components Sy,Sz; how to get position matrices...

7 years ago | 0 answers | 0

Question

how to perform for loop;

dim=64; [kx,ky]=meshgrid(-1:2/(dim-1):1); circ=sqrt(kx.^2+ky.^2)<1; kx=kx/2; ky=ky/2; a...

7 years ago | 0 answers | 0

Question

how to get cross product of two vectors?

hi, I have problem to find out crossproduct of two vectors(AXB), where each component of vector represent 4X4 matrix example...

7 years ago | 1 answer | 0

Question

How to get cross product?

Hi, I have problem in follolowing code,can any one help me to get cross product of E and B clear all; clc; close a...

7 years ago | 1 answer | 0

Question

HOW TO GET TOTAL DATA FROM FOR LOOP?

Hi, I have problem in following code, I am saving for loop data using the following method(matrix method) but it is lengt...

7 years ago | 1 answer | 0

Question

How to find out the separation between to peaks of the azimuthally polarised beam at full width at half maximum?

hi, I have problem to find separation between two peaks at full width at half maximum, if you run following code you find figure...

7 years ago | 0 answers | 0

Question

How to find out the separation between to peaks of the azimuthally polarised beam at full width at half maxiumu?

Hi, I have problem in the following code, can anyone help me in this regard, it is great help for me; [kx,ky]=meshgrid(-1:...

7 years ago | 0 answers | 0

Question

HOW TO FIND THE FULL WIDTH AT HALF MAXIMUM

Hi, I have a problem in the following code: clear all; clc; close all; lamda=531e-9; k=2*pi/lamda; [x,y]=...

7 years ago | 1 answer | 0