matlab-光学组件工具包-可以仿真spot，几何像差，如慧差，球差，mtf

Welcome to the Optical Ray-trace TOOLBOX (RT TB), version 1.0 beta, for MATLAB (Trademark of the MathWorks, Inc.) from the University of Applied Sciences Heilbronn, November 2002. Please direct any questions and comments to the Author: Prof. Dr.-Ing. Peter Ott Mechatronics Department University of Applied Sciences Heilbronn Max-Planck-Str. 39 D-74081 Heilbronn Germany ott@fh-heilbronn.de For further information please visit my web site: http://www.mm.fh-heilbronn.de/ott/ This Optical Ray-trace Toolbox (RT TB) is intended to aid teaching on geometrical optics, ray-tracing and lens design. The RT TB is free to use. It is aimed to give the 'look and feel' of professional software with all possibilities to alter and add graphical output, algorithms and code All functions of the RT TB are documented in the same way as MATLAB functions, i.e. in the header of the files. Call 'help FUNCTION_NAME' in the command window to show the documentation. All functions are listed at the end of this file (ReadMe.txt). In short, the capabilities of the RT TB are: - to easily add or modify code! - to input surfaces of the following kind: Sphere, Asphere, Cylinder, Mirror, Ideal Lens - to do full paraxial analysis, including basic data (efl, bfl, ...), marginal and principal rays, pupils, ... - to perform exact sequential ray-trace on the above mentioned surfaces - to plot the layout of an optical system together with a bunch of rays - to plot spot diagrams, tangential and sagittal plots, curvature, distortion, lateral color - to calculate and display the wavefront in the exit pupil and the point spread function (PSF) - to optimize an optical system by the aid of the MATLAB OPTIMIZATION TOOLBOX - to adapt for special use, e.g. to simulate the sensor signal of an astigmatic-optical sensor for distance measurement Not yet realized: - graphical user interface to input an optical system (work in progress...) - decentered and tilted surfaces (work in progress...) - third order aberration contribution of each surface - error handling - ... To explore the capabilities and the handling of the software, please take some time. Software is as least as complicated as the subject it covers... Instead of a user manual, instructive and documented examples are included. Perform the following steps: - You must have installed MATLAB version 5.3 or later (for use of the optimization capabilities, the MATLAB OPTIMZATION TOOLBOX must be installed) - Please extract all files from RTTB.ZIP, downloaded from http://www.mm.fh-heilbronn.de/ott/ - Add all paths of the RT TB files to your MATLAB path list - Run the following examples which are located in the home directory of the RT TB, one by one and in the below mentionded order. Have a carefull look on the code and on the functions called in these examples. - Play around with the examples... Examples to explore the RT TB: (just execute the name in capital letters in the command window) %TEST_PAR test paraxial functions and draw the system togehter with the principal and marginal ray %TEST_PLOT_LAYOUT plot the layout of a of simple spherical system with the object at finite distance %TEST_PLOT_LAYOUT_INF plot the layout of a of simple spherical system with object point at infinity %TEST_SPOT_DIAG generate a single spot diagramm of simple spherical system with object point at infinity %TEST_IDEAL plots the layout of an optical system consisting of ordinary spherical surfaces and an ideal lens %TEST_CYL_SPOT_DIAG generate a single spot diagram of a simple sphero-cylindrical system with object point at infinity %TEST_PLOT_DIAGRAMMS show spot and plot diagrams and the layout of a triplet for an object at finite distance %TEST_PLOT_DIAGRAMMS_INF show spot and plot diagrams and a layout of a triplet %TEST_PLOT_DIAGRAMMS_ASPH_INF show spot and plot diagrams and the layout of a triplet with an aspheric surface %TEST_PSF show the wavefront in the exit pupil and the point spread function of a triplet for an off-axis object point at infinity; % The data of the entrance pupil is calculated from the data of the stop. % The wavefront is calculated in the elliptical shape of the exit pupil for off-axis object points. %TEST_OPT_LANDSCAPE test the optimization of a landscape lens (a simple lens with small stop used in the field); % the initial system is shown together with the spot and plot diagrams and the system after optimization. % The optimization will take some time (~1 min on a Pentium)... % As variable parameters for optimization the two curvatures of the lens, the thickness of the lens, the location % of the detector plane and the location of the entrance pupil are used. % The optimization function used here is FMINCON from the MATLAB OPTIMIZATION TOOLBOX. % The merit function is the average rms-spot-size on-axis, zone and full field for three wavelengths. %TEST_OPT_LANDSCAPE_PLOT test the optimization of a landscape lens while plotting the actual status of the optimization; % the initial system is shown together with the spot and plot diagrams. % The opimization process is monitored in another window... % The result afer optimzation is also shown. % The optimization will take some time (~1 min on a Pentium)... % As variable parameters for optimization the two curvatures of the lens, the thickness of the lens, the location % of the detector plane and the location of the entrance pupil are used. % The optimization function used here is FMINCON from the MATLAB OPTIMIZATION TOOLBOX. % The merit function is the average rms-spot-size on-axis, zone and full field for three wavelengths. % A bunch of paramters for the merit function is used, see below. %TEST_QUAD_DIAG shows an astigmatic sensor with 4-element detector for distance measurement, e.g. in optical disk drives. % For details see http://www.mm.fh-heilbronn.de/ott/ and download the presentation given at the DGaO 2001 % The layout of the system is shown, containing an ideal lens, a mirror and a cylindrical surface % The sensor signal is caluculated for different object locations based on exact ray trace together with approximative first order layout. % The calculation of the sensor signal takes some time (~ 1 min on a PENTIUM)... % The accuracy of the sensor signal calculation can be increased if more rays are traced, of course. % The beamsplitter, which is necessary in real world, is ommitted here in the simulation. Your input is very welcome! Peter Ott Heilbronn, 5th of June 2001 Descirbtion of the structure OPT_SYS, which defines an optical system (some fields are not needed in all functions) % OPT_SYS.N_SURF (number of optical surfaces including the detector plane) % OPT_SYS.C (OPT_SYS.N_SURF-by-1 element vector of the curvatures of the surfaces including the detector plane) % OPT_SYS.D (OPT_SYS.N_SURF-by-1 element vector of the distances between the surfaces; % the first distance OPT_SYS.D(1) is the distance from a starting surface % to the first refracting surface, which is not relevant in this function % OPT_SYS.N (OPT_SYS.N_SURF-by-N_C element matrix of the refraction indices of the media, where N_C is the % number of wavelength) % OPT_SYS.H (OPT_SYS.N_SURF-by-1 element vector of the heights of the surfaces, i.e. semi-diameter) % OPT_SYS.H_EP (the radius of the entrance pupil) % OPT_SYS.D_EP (the distance of the entrance pupil from the starting surface % OPT_SYS.A (OPT_SYS.N_SURF-by-? element matrix specifing the typ of surface and additional surface parameters % OPT_SYS.A(i,1) = 0 specifies the i-th surface to be of spherical typ % OPT_SYS.A(i,1) = 1 specifies the i-th surface to be of aspherical typ % OPT_SYS.A(i,2) specifies in this case the conical constant % OPT_SYS.A(i,3:N_ASPH) specify in this case the higher order terms (x^2+y^2)^(2:N_ASPH-1) % OPT_SYS.A(i,1) = 2 specifies the i-th surface to be of sphero-cylindrical typ %