Hua Liu

High-fidelity fabrication of sub-millimeter thickness silica glass optical components via a synergistic suppression strategy in UV imprint lithography

Ultraviolet imprinting technology offers significant advantages in fabricating silica glass optical devices due to the high precision, high efficiency, and excellent reproducibility. However, when fabricating components with sub-millimeter thickness and high aspect ratios, the st...

Multiscale axial displacement measurement based on radially segmented double-helix PSF and multi-feature hierarchical demodulation

The double-helix point spread function (DH-PSF) inherently suffers from a trade-off between axial range and sensitivity, which limits its use in optical alignment and focal-plane tracking tasks that require both wide-range acquisition and high-precision localization. To overcome...