Dual-mode variable-array imaging interferometer testbed for the MEAYIN program.

Area of Science:

• Astronomy and Astrophysics
• Optical Engineering
• Interferometry

Background:

• Growing interest in detecting habitable exoplanets using mid-infrared light.
• China's proposed Multiple-spacecraft Exoplanet Aperture sYnthetic INterferometer (MEAYIN) program for space-based exoplanet detection.
• Need for preliminary laboratory research in phased array imaging interferometry to support MEAYIN.

Purpose of the Study:

• To establish and study a dual-mode variable-array imaging interferometer testbed (DVIIT).
• To investigate phased array imaging techniques for potential space-based applications.
• To develop and validate an optical model for simulating space-based interferometry.

Main Methods:

• Established a dual-mode variable-array imaging interferometer testbed (DVIIT).
• Utilized a white light source (400-900 nm) and a varying array function.
• Conducted experiments compatible with both Fizeau and Michelson interferometric modes.
• Developed an optical model for simulation and verification.

Main Results:

• Successfully established and operated the DVIIT, validating the optical model.
• Achieved the first experimental realization of Fizeau interferometric imaging with variable arrays and a 1-arcminute field of view.
• Demonstrated compatibility with both Fizeau and Michelson modes and enhanced UV coverage.

Conclusions:

• The DVIIT and its optical model provide crucial support for the MEAYIN program.
• Experimental data and the validated model will guide the design of space-based platforms.
• This research aids the development of image synthesis and restoration algorithms for future exoplanet detection missions.