A5009009013- Advanced X-ray Imaging Techniques
- Laser-Plasma Interactions and Diagnostics
- Optical measurement and interference techniques
- Digital Holography and Microscopy
- Optical Systems and Laser Technology
- Laser Material Processing Techniques
- Advanced Surface Polishing Techniques
- Optical Polarization and Ellipsometry
Zhejiang University
2024
Tsinghua University
2024
ShanghaiTech University
2019-2020
Shanghai Institute of Optics and Fine Mechanics
2017-2020
University of Chinese Academy of Sciences
2020
Chinese Academy of Sciences
2017
Determining the complete optical behavior of anisotropic samples using ptychography is always a difficult problem. We propose novel birefringence measurement method based on mixed-state that can simultaneously obtain azimuth angle and retardation in single scan. By reference system transformation, two mutually orthogonal object states are unambiguously retrieved, their errors greatly reduced. The normalized root mean square obtained 0.0011 0.0041, respectively. This offers more rapid data...
In a high power laser system, the stress in large-aperture optical component could affect system beam quality and safe operation. But studies on distribution influence mainly focus finite element analysis. A new measurement method for sample, which combines ptychography with polarization technique, is presented. The birefringent sample placed parallel probe-forming path. By complex amplitude reconstructions of probes carrying information under different states, separation two principal...
Recent advances in ptychography have extended to anisotropic specimens, but vectorial reconstruction of probes owing polarization aliasing remains a challenge. A polarization-sensitive that enables full optical property measurement vector light is proposed. An optimized strategy, first calibrating the propagation direction and then performing faithful retrieval, established. This method avoids multiple image acquisitions with various polarizer configurations significantly improves accuracy...
3ω laser damage of fused silica optics is the bottleneck high power systems for ICF. Excellent beam quality plays an important role in improving anti-damage capability final system. We have developed a new optical field measurement technology based on computational imaging. With prototype SGII-UP facility, resistance was experimentally studied. The near filed measured with resolution to study effects modulation and propagation damage. improvement are reported influence performance discussed....
A novel stress vector measurement method combining ptychography and polarization technologies is proposed. By placing the sample in probe-forming path two circular polariscopes with a beamsplitter, complex amplitudes of orthogonal probe components are reconstructed under single ptychographic scan. Three parameters extracted simple effective approach, where isopachics isoclinics directly obtained from phase information solution isochromatics easily realized by combination amplitude phase. The...
In a high power laser system, the wavefront quality of large optical components in mid spatial frequency band plays critical role system performance and safe operation. A simple efficient method based on ptychography is used to measure mid-frequency error, which has advantages structure, strong anti-interference ability, flexible frequency-range selection, low cost. It excellent response entire region. The transfer function demonstrated be greater than 0.7 at 1/2 Nyquist frequencies (8.33...
Although it is a simple and convenient birefringence analysis instrument, the traditional planar polariscope difficult to use for quantitative measurement of phase retardation azimuth angle. A novel 2D method based on ptychographic iterative engine (PIE) in proposed. The birefringent sample placed parallel probe-forming path. By inserting an isotropic diffractive object with good modulation property probe, scan measurements are performed under two different dark-field states. amplitudes...