Time-average Fourier telescopy: a scheme for high-resolution imaging through horizontal-path turbulence

Area of Science:

• Optical physics
• Astronomy
• Remote sensing

Background:

• Long-standing challenge of achieving high-resolution imaging through atmospheric turbulence.
• Limitations of existing methods for ground-level, horizontal-path imaging over long distances.

Purpose of the Study:

• To present a novel method for achieving diffraction-limited imaging through ground-level turbulence.
• To address the problem of imaging with large apertures over kilometer-scale distances.

Main Methods:

• Utilizing Fourier telescopy to collect image data in the spatial frequency domain.
• Implementing time averaging of the magnitude and phase of the Fourier telescopy signal.
• Employing active laser illumination of the target.

Main Results:

• Demonstrates a promising approach for overcoming atmospheric turbulence limitations.
• Potential for achieving unprecedented resolution in long-distance imaging.

Conclusions:

• The proposed Fourier telescopy method shows significant potential for high-resolution imaging through turbulence.
• The technique requires active illumination and long averaging times, limiting its use to static scenes.