Optical Design of Wide-Field and Broadband Light Field Camera for High-Precision Optical Surface Defect Detection

To address the challenges in high-precision optical surface defect detection, we propose a novel design of wide-field and broadband light field camera. The system can achieve a 50° field of view (FOV) and work at visible and near-infrared wavelengths. By leveraging light field imaging principles, the proposed design enables 3D reconstruction of optical surfaces, facilitating the measurement of vertical surface height with enhanced accuracy. Using Zemax-based simulations, we evaluate the system’s modulation transfer function (MTF), optical aberrations, and tolerance to shape variations through Zernike coefficient adjustments. The results demonstrate that this system can achieve a required spatial resolution while maintaining high imaging quality, offering a promising solution for advanced optical surface defect inspection.