Examples of diffraction limited optics calculations.

See also: oiCreate, oiCompute, oiSet, oiPlot

(c) Imageval Consulting, LLC, 2012

Contents

ieInit

Create a point array scene

scene = sceneCreate('point array');
scene = sceneSet(scene,'h fov',1);    % Degrees
ieAddObject(scene); sceneWindow;

Compute the irradiance

oi = oiCreate;
oi = oiCompute(oi,scene);
oi = oiSet(oi,'name','Default f/#');
ieAddObject(oi);
oiWindow;

Create diffraction limited optics with f/# of 12

% Current f number
oiGet(oi,'optics f number')

% The larger f/# blurs the image more
% It has larger depth of field, however, because the aperture is smaller.
oi = oiSet(oi,'optics fnumber',12);
oi = oiSet(oi,'name','Large f/#');
oi = oiCompute(oi,scene);

ieAddObject(oi);
oiWindow;

ans =

     4

Plot the point spread

oiPlot(oi,'psf 550');

Check the inter-related parameters

p = oiGet(oi,'optics pupil diameter','mm')
f = oiGet(oi,'optics focal length','mm')
f/p

p =

    0.3219


f =

    3.8628


ans =

   12.0000

Show the diffraction-limited blur dependence on wavelength

uData = oiPlot(oi,'ls wavelength');
title(sprintf('F/# = %.0d',oiGet(oi,'optics f number')))

Look at the data structure returned by oiPlot

uData

uData = 

  struct with fields:

             x: [-16.8000 -16 -15.2000 -14.4000 -13.6000 … ] (1×41 double)
    wavelength: [31×1 single]
        lsWave: [31×41 double]

Published with MATLAB® R2024a