Objective 01
Lock degraded optical signals
Measure Shack-Hartmann spot patterns when turbulence, noise, scintillation, and uneven sub-aperture reliability make the wavefront difficult to recover.
Optical Engineering · Wavefront Sensing
Robust Wavefront Sensing
Zhihao Lei / 雷知昊 · PhD Candidate in Optical Engineering
Robust Shack-Hartmann wavefront sensing for noisy, turbulent, and low-signal optical measurements.
Shack-Hartmann WFSAdaptive OpticsComputational ImagingSpot Image DenoisingCentroid EstimationSNR-weighted Reconstruction
Research Focus
Reliable measurement across the sensing workflow.
Objective 02
Restore the measurement chain
Connect spot restoration, centroid estimation, confidence weighting, and wavefront reconstruction into a practical image-to-correction workflow.
Objective 03
Guide adaptive correction
Treat reconstruction as a mission-critical handoff: robust measurements become actionable inputs for adaptive optics control and computational imaging.
Research Workflow
From spot images to corrected wavefronts.
Acquire spot field
Capture noisy, distorted Shack-Hartmann spot arrays under unstable optical conditions.
Restore image signal
Apply denoising and preprocessing so weak spot patterns remain measurable.
Estimate centroids
Extract reliable local displacements and weigh sub-apertures by signal quality.
Reconstruct wavefront
Convert local measurements into a corrected wavefront estimate for AO workflows.
Selected Research Directions
Current projects in wavefront sensing, image restoration, and adaptive optics.
WTCOG + SNR-WLS Wavefront Reconstruction
Weighted centroiding and signal-quality-aware reconstruction for Shack-Hartmann measurements.
WTCOGSNR-WLSSH-WFS
View projectSH-WFS Spot Image Denoising
Denoising workflows for degraded Shack-Hartmann spot images before centroid estimation.
Spot ImagesLow-SNRDenoising
View projectDnCNN-BN Residual Denoising Network
Residual-learning denoising experiments for optical spot image restoration workflows.
DnCNN-BNResidual LearningVST-domain
View projectPublications & Contact
Manuscripts in preparation
Only verified publications will be listed. Current work remains presented as research direction and project context, not performance claims.
Publication Policy