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 # Example 04 - Matlab 

 Last update: 16.07.2025 

# <a class="anchor" id="ex04_s4"></a>Matlab

function [ r ] = MATLABStandalone_pull_data_from_FFTMTF( args )

 

if ~exist('args', 'var')

 args = [];

end

 

% Initialize the OpticStudio connection

TheApplication = InitConnection();

if isempty(TheApplication)

 % failed to initialize a connection

 r = [];

else

 try

 r = BeginApplication(TheApplication, args);

 CleanupConnection(TheApplication);

 catch err

 CleanupConnection(TheApplication);

 rethrow(err);

 end

end

end

 

 

function [r] = BeginApplication(TheApplication, args)

 

import [ZOSAPI](namespace_z_o_s_a_p_i.xhtml).*;

 

 % Set up primary optical system

 TheSystem = TheApplication.PrimarySystem;

 sampleDir = TheApplication.SamplesDir;

 

 %! [e04s01_m]

 % Open file

 testFile = System.String.Concat(sampleDir, '\Sequential\Objectives\Cooke 40 degree field.zos');

 TheSystem.LoadFile(testFile,false);

 %! [e04s01_m]

 

 %! [e04s02_m]

 % Create analysis

 newWin = TheSystem.Analyses.New_FftMtf(); 

 %! [e04s02_m]

 

 %! [e04s03_m]

 % Settings

 newWin_Settings = newWin.GetSettings();

 newWin_Settings.MaximumFrequency = 50;

 newWin_Settings.SampleSize = [ZOSAPI](namespace_z_o_s_a_p_i.xhtml).Analysis.SampleSizes.S_256x256;

 %! [e04s03_m]

 

 %! [e04s04_m]

 % Run Analysis &amp; gets results

 newWin.ApplyAndWaitForCompletion();

 newWin_Results = newWin.GetResults();

 %! [e04s04_m]

 

 

 figure('position', [50, 150, 900, 600])

 hold on;

 grid on;

 

 %! [e04s05_m]

 % Read and plot data series

 dataSeries = newWin_Results.DataSeries;

 cc=lines(double(newWin_Results.NumberOfDataSeries));

 for gridN=1:newWin_Results.NumberOfDataSeries

 data = dataSeries(gridN);

 y = data.YData.Data.double;

 x = data.XData.Data.double;

 plot(x,y(:,1),'-','color',cc(gridN,:));

 plot(x,y(:,2),':','color',cc(gridN,:));

 end

 %! [e04s05_m]

 

 title('FFT MTF');

 xlabel('Spatial Frequency in cycles per mm');

 ylabel('Modulus of the OTF');

 legend('0^\circ tangential', '0^\circ sagittal', '14^\circ tangential', ...

 '14^\circ sagittal', '20^\circ tangential', '20^\circ sagittal');

 

 

 r = [];

end

 

function app = InitConnection()

 

import System.Reflection.*;

 

% Find the installed version of OpticStudio.

zemaxData = winqueryreg('HKEY_CURRENT_USER', 'Software\Zemax', 'ZemaxRoot');

NetHelper = strcat(zemaxData, '\ZOS-API\Libraries\ZOSAPI_NetHelper.dll');

% Note -- uncomment the following line to use a custom NetHelper path

% NetHelper = 'C:\Users\Documents\Zemax\ZOS-API\Libraries\ZOSAPI_NetHelper.dll';

NET.addAssembly(NetHelper);

 

success = ZOSAPI_NetHelper.ZOSAPI_Initializer.Initialize();

% Note -- uncomment the following line to use a custom initialization path

% success = ZOSAPI_NetHelper.ZOSAPI_Initializer.Initialize('C:\Program Files\OpticStudio\');

if success == 1

 LogMessage(strcat('Found OpticStudio at: ', char(ZOSAPI_NetHelper.ZOSAPI_Initializer.GetZemaxDirectory())));

else

 app = [];

 return;

end

 

% Now load the ZOS-API assemblies

NET.addAssembly(AssemblyName('ZOSAPI_Interfaces'));

NET.addAssembly(AssemblyName('[ZOSAPI](namespace_z_o_s_a_p_i.xhtml)'));

 

% Create the initial connection class

TheConnection = [ZOSAPI](namespace_z_o_s_a_p_i.xhtml).ZOSAPI_Connection();

 

% Attempt to create a Standalone connection

 

% NOTE - if this fails with a message like 'Unable to load one or more of

% the requested types', it is usually caused by try to connect to a 32-bit

% version of OpticStudio from a 64-bit version of MATLAB (or vice-versa).

% This is an issue with how MATLAB interfaces with .NET, and the only

% current workaround is to use 32- or 64-bit versions of both applications.

app = TheConnection.CreateNewApplication();

if isempty(app)

 HandleError('An unknown connection error occurred!');

end

if ~app.IsValidLicenseForAPI

 HandleError('License check failed!');

 app = [];

end

 

end

 

function LogMessage(msg)

disp(msg);

end

 

function HandleError(error)

ME = MXException(error);

throw(ME);

end

 

function CleanupConnection(TheApplication)

% Note - this will close down the connection.

 

% If you want to keep the application open, you should skip this step

% and store the instance somewhere instead.

TheApplication.CloseApplication();

end

 

 

[ZOSAPI](namespace_z_o_s_a_p_i.xhtml)

The ZOSAPI namespace contains classes for initially connecting to zemax. See also ZOSAPI_Connection,...

**Definition:** IAS_FieldCurvatureAndDistortion.cs:5