抱歉之前的答案没有准确实现您的要求。让我们重新整理这个过程并确保我们构建了正确的微透镜阵列及其光学仿真。下面是调整后的代码:
- % 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 = 10; % 10x10 microlens array
- points_per_lens = 500; % Sampling points per microlens
- edge_margin = 20e-6; % 20 micrometers on each edge
- % Calculate grid dimensions considering the margins
- individual_lens_size = microlens_diameter + microlens_spacing;
- total_size = array_size * individual_lens_size;
- physical_total_size = total_size + 2 * edge_margin;
- grid_points = round(points_per_lens * physical_total_size / microlens_diameter);
- % Create mesh grid for the shape of a single microlens
- [x_single, y_single] = 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_single.^2 - y_single.^2);
- z_single(x_single.^2 + y_single.^2 > (microlens_diameter/2)^2) = 0; % Mask out areas outside the lens
- % Initialize the entire microlens array
- z_array = zeros(grid_points);
- % Fill the microlens array with individual microlens profiles
- single_lens_points = size(z_single, 1);
- offset_margin = round(edge_margin * grid_points / physical_total_size);
- for i = 0:(array_size-1)
- for j = 0:(array_size-1)
- % Calculate position indices in terms of grid points
- x_offset = offset_margin + i * single_lens_points;
- y_offset = offset_margin + j * single_lens_points;
-
- z_array(x_offset+1:x_offset+single_lens_points, y_offset+1:y_offset+single_lens_points) = ...
- max(z_array(x_offset+1:x_offset+single_lens_points, y_offset+1:y_offset+single_lens_points), z_single);
- end
- end
- % Plot microlens array surface
- figure;
- x_space = linspace(-physical_total_size/2, physical_total_size/2, size(z_array, 1)) * 1e6;
- y_space = linspace(-physical_total_size/2, physical_total_size/2, size(z_array, 2)) * 1e6;
- surf(x_space, y_space, z_array * 1e6);
- title('Microlens Array Surface Profile');
- xlabel('X (micrometers)');
- ylabel('Y (micrometers)');
- zlabel('Height (micrometers)');
- shading interp;
- axis tight;
- colormap jet;
- view(3);
- % Simulate the diffraction pattern at the focal plane
- k = 2*pi / wavelength;
- [X_focal, Y_focal] = meshgrid(linspace(-physical_total_size/2, physical_total_size/2, size(z_array, 1)));
- lens_phase = exp(-1j * k/(2*focal_length) * (X_focal.^2 + Y_focal.^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(x_space, y_space, intensity_pattern);
- title('Intensity Pattern at Focal Plane');
- xlabel('X (micrometers)');
- ylabel('Y (micrometers)');
- colormap hot;
- colorbar;
- axis equal tight;
复制代码
### 关键修正:
1. **变量定义**:确保 `x_single` 和 `y_single` 使用 `meshgrid` 正确创建,用于计算单个微透镜的曲面形状。
2. **索引正确性**:根据 `z_single` 的大小准确递增偏移量,确保在阵列中放置每一个微透镜。
3. **光学计算**:使用 Fourier 光学的方法计算通过微透镜聚焦后的强度分布。
请尝试执行这段代码并查看结果。如果仍有问题,请告诉我以便进一步帮助。
--- 光学专家Gpt |