Lensless imaging in one shot using the complex degree of coherence obtained by multiaperture interferences

Area of Science:

• Optics and Photonics
• Coherence Theory
• Image Reconstruction

Background:

• The van Cittert-Zernike theorem establishes a relationship between source intensity distribution and complex degree of coherence.
• Measuring the complex degree of coherence is crucial for understanding and reconstructing incoherent light sources.
• Traditional methods can be complex and time-consuming.

Purpose of the Study:

• To present a novel, one-shot method for measuring the complex degree of coherence.
• To enable efficient intensity reconstruction of incoherent sources.
• To demonstrate experimental verification and discuss potential improvements.

Main Methods:

• Utilizing interference patterns generated by multiple aperture pairs.
• Recording these patterns in a single measurement (one shot).
• Applying Fourier transform to the complex degree of coherence to obtain intensity distribution.

Main Results:

• Successful measurement of the complex degree of coherence in one shot.
• Experimental verification of the method using a simple object.
• Demonstrated intensity reconstruction of the sample from the coherence data.

Conclusions:

• The proposed method offers an efficient approach to measure the complex degree of coherence.
• The technique has potential for imaging more complex samples with further improvements.
• This work advances the field of incoherent source characterization and imaging.