1 results about "Zemax" patented technology

This invention discloses a full-field metalens, a piezoelectric fiber scanning device, and a two-photon imaging system, belonging to the technical field of two-photon imaging systems. The metalens of this invention uses gallium nitride (GaN) material and includes a substrate, a GaN thin film, and a periodically arranged nanopillar unit structure. The unit period is 400–800 nm, the nanopillar height is 300–800 nm, and the length and width are both 50–600 nm. Based on the generalized Snell's law, image plane field curvature and off-axis vignetting are introduced in Zemax software to perform polynomial optimization of the phase distribution of the metalens, achieving full-field imaging. The piezoelectric fiber scanning device passes an optical fiber through a piezoelectric tube and fixes it in place. A voltage signal is applied to the electrodes of the piezoelectric tube by a controller to drive the optical fiber to perform two-dimensional scanning. This invention overcomes the limitations of traditional off-axis imaging through the optimized design of the metalens. Combined with the resonant scanning mechanism of the piezoelectric fiber scanning device, it achieves a synergistic improvement in large field of view and high-speed imaging, possessing the advantages of simplified structure, lightweight design, and high performance.