Publications by authors named "Qianjin Xiang"
Moiré fringe is an effective approach to realize nano-alignment. However, affected by short periodicity and phase unwrapping, moiré fringe technology has small alignment ranges and redundant algorithms, making it difficult to meet practical application requirements. To solve the problem, we propose a large-range lithography nano-alignment method without phase unwrapping by a dual-frequency moiré fringe heterodyne.
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- Fourier single-pixel imaging (FSI) is a cost-effective technique that reconstructs images by measuring Fourier coefficients using just one detector, gaining popularity for its broad spectrum range.
- Current methods struggle to balance noise reduction and image details due to limited measurements, prompting the need for an improved sampling strategy.
- The new method considers the unique spectral distribution of target images and the general properties of natural images, allowing for more efficient and detailed sampling of important Fourier coefficients, resulting in less noise and better overall image quality.
Article Synopsis
- - Recent research in modulation-based structured illumination microscopy focuses on improving modulation distribution extraction from images, as current frequency-domain algorithms often miss high-frequency details, leading to analytical errors.
- - A new spatial area phase-shifting method enhances precision by retaining high-frequency information but struggles with abrupt changes in surface topography, like steps.
- - To address this issue, a high-order spatial phase shift algorithm is introduced, effectively analyzing discontinuous surfaces and utilizing a residual optimization strategy, resulting in improved accuracy for complex topographies, which is supported by simulations and experimental findings.