对于MATLAB中的`zeros`函数,你需要为二维数组指定两个维度。之前的代码中,在初始化大的微透镜阵列时,只提供了一个维度,这显然是不够的。我们需要定义一个方形的零矩阵。以下是修正后的代码片段:
- % Initialize the entire microlens array
- z_array = zeros(points_per_lens * array_size, points_per_lens * array_size);
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完整代码如下:
- % MATLAB script to simulate a microlens array
- % Parameters
- microlens_diameter = 50e-6; % 50 micrometers
- microlens_spacing = 10e-6; % 10 micrometers
- focal_length = 300e-6; % 300 micrometers
- curvature_radius = 2.1e-6; % 2.1 micrometers
- wavelength = 1000e-9; % 1000 nm
- array_size = 64; % 64x64 microlens array
- points_per_lens = 500; % Sampling points per microlens
- % Create mesh grid for the shape of a single microlens
- [x, y] = meshgrid(linspace(-microlens_diameter/2, microlens_diameter/2, points_per_lens));
- % Calculate the surface profile of a single microlens
- R = curvature_radius;
- z_single = R - sqrt(R^2 - x.^2 - y.^2);
- z_single(x.^2 + y.^2 > (microlens_diameter/2)^2) = 0; % Mask out areas outside the lens
- % Initialize the entire microlens array
- z_array = zeros(points_per_lens * array_size, points_per_lens * array_size);
- % Fill the microlens array with repeated patterns
- for i = 0:(array_size-1)
- for j = 0:(array_size-1)
- x_offset = i * points_per_lens;
- y_offset = j * points_per_lens;
- z_array(x_offset+1:x_offset+points_per_lens, y_offset+1:y_offset+points_per_lens) = ...
- max(z_array(x_offset+1:x_offset+points_per_lens, y_offset+1:y_offset+points_per_lens), z_single);
- end
- end
- % Plot microlens array surface
- figure;
- surf(linspace(-array_size*(microlens_diameter+microlens_spacing)/2, ...
- array_size*(microlens_diameter+microlens_spacing)/2, array_size*points_per_lens) * 1e6, ...
- linspace(-array_size*(microlens_diameter+microlens_spacing)/2, ...
- array_size*(microlens_diameter+microlens_spacing)/2, array_size*points_per_lens) * 1e6, ...
- z_array * 1e6);
- title('Microlens Array Surface Profile');
- xlabel('X (micrometers)');
- ylabel('Y (micrometers)');
- zlabel('Height (micrometers)');
- shading interp;
- axis equal tight;
- colormap jet;
- view(3);
- % Simulate the diffraction pattern at the focal plane
- k = 2*pi / wavelength;
- [X, Y] = meshgrid(linspace(-array_size*(microlens_diameter+microlens_spacing)/2, ...
- array_size*(microlens_diameter+microlens_spacing)/2, array_size*points_per_lens));
- lens_phase = exp(-1j * k/(2*focal_length) * (X.^2 + Y.^2));
- field_at_lens = lens_phase .* exp(-1j*k*z_array); % Initial field passing through the lens
- % FFT to compute the field at the focal plane
- Eout = fftshift(fft2(ifftshift(field_at_lens)));
- intensity_pattern = abs(Eout).^2;
- % Normalize intensity
- intensity_pattern = intensity_pattern / max(intensity_pattern(:));
- % Plot intensity pattern at the focal plane
- figure;
- imagesc(linspace(-array_size*(microlens_diameter+microlens_spacing)/2, ...
- array_size*(microlens_diameter+microlens_spacing)/2, array_size*points_per_lens) * 1e6, ...
- linspace(-array_size*(microlens_diameter+microlens_spacing)/2, ...
- array_size*(microlens_diameter+microlens_spacing)/2, array_size*points_per_lens) * 1e6, ...
- intensity_pattern);
- title('Intensity Pattern at Focal Plane');
- xlabel('X (micrometers)');
- ylabel('Y (micrometers)');
- colormap hot;
- colorbar;
- axis equal tight;
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此修正应该可以解决初始化数组大小的问题,并正确地构建微透镜阵列。
--- 光学专家Gpt |