Variable-ratio radial-shearing interferometry with bifocal zone-plate twins.

Area of Science:

• Optical Engineering
• Wavefront Sensing
• Interferometry

Background:

• Traditional radial-shearing interferometers require complex adjustments or component replacements for ratio changes.
• Existing wavefront sensing methods can be limited by optical complexity and processing demands.

Purpose of the Study:

• To develop a compact and simplified radial-shearing interferometer.
• To enhance wavefront reconstruction by integrating a UNet network for fringe analysis.
• To address real-time precision measurement challenges in optical systems.

Main Methods:

• Utilized bifocal zone-plate twins for a compact radial-shearing interferometer design.
• Acquired two interference images with varying radial-shearing ratios simultaneously.
• Employed a UNet network to extract interference fringe skeletons for iterative wavefront reconstruction.

Main Results:

• Achieved a simplified optical hardware setup compared to traditional systems.
• Enabled simultaneous measurement of two different radial-shearing ratios.
• Integrated image processing with wavefront reconstruction for efficiency.

Conclusions:

• The proposed compact interferometer simplifies optical hardware and image processing in wavefront sensing.
• This technology shows promise for real-time precision measurements in astronomy and gravitational science.
• Offers a novel approach to overcome limitations in current interferometric systems.