function [] = initializeMirror(args)
    arguments
        args.shape       char   {mustBeMember(args.shape,{'spherical', 'conical'})} = 'spherical'
        args.angle (1,1) double {mustBeNumeric, mustBePositive} = 45
    end

    %%
    mirror = struct();
    mirror.h = 50; % height of the mirror [mm]
    mirror.thickness = 25; % Thickness of the plate supporting the sample [mm]
    mirror.hole_rad = 120; % radius of the hole in the mirror [mm]
    mirror.support_rad = 100; % radius of the support plate [mm]
    mirror.jacobian = 150; % point of interest offset in z (above the top surfave) [mm]
    mirror.rad = 180; % radius of the mirror (at the bottom surface) [mm]

    mirror.density = 2400; % Density of the mirror [kg/m3]
    mirror.color = [0.4 1.0 1.0]; % Color of the mirror

    mirror.cone_length = mirror.rad*tand(args.angle)+mirror.h+mirror.jacobian; % Distance from Apex point of the cone to jacobian point

    %% Shape
    mirror.shape = [...
        0 mirror.h-mirror.thickness
        mirror.hole_rad mirror.h-mirror.thickness; ...
        mirror.hole_rad 0; ...
        mirror.rad 0 ...
    ];

    if strcmp(args.shape, 'spherical')
        mirror.sphere_radius = sqrt((mirror.jacobian+mirror.h)^2+mirror.rad^2); % Radius of the sphere [mm]

        for z = linspace(0, mirror.h, 101)
            mirror.shape = [mirror.shape; sqrt(mirror.sphere_radius^2-(z-mirror.jacobian-mirror.h)^2) z];
        end
    elseif strcmp(args.shape, 'conical')
        mirror.shape = [mirror.shape; mirror.rad+mirror.h/tand(args.angle) mirror.h];
    else
        error('Shape should be either conical or spherical');
    end

    mirror.shape = [mirror.shape; 0 mirror.h];

    %% Save
    save('./mat/stages.mat', 'mirror', '-append');
end