Fresnel-domain interpolation-based computer-generated hologram synthesis for high-resolution reconstruction

We present a Fresnel-domain interpolation-based method for computer-generated hologram (CGH) synthesis, designed for high-resolution reconstruction at finite propagation distances. The method enables high-resolution optical reconstruction of object waves from low-resolution data using analytically derived weight functions for several interpolation schemes. This is the first application, to the best of our knowledge, of analytically derived interpolation functions to Fresnel CGH synthesis. Numerical simulations and optical experiments demonstrate that reconstructed images obtained from interpolated low-resolution object data achieve image quality comparable to that obtained with conventional methods using high-resolution inputs. The proposed method has potential applications in high-resolution holographic displays, high-quality optical wavefront reconstruction, and related CGH-based technologies.