Orientation-selective sub-Rayleigh imaging with spatial coherence lattices

Area of Science:

• Optics and Photonics
• Image Resolution
• Coherence Theory

Background:

• The Rayleigh resolution criterion traditionally limits the distinguishability of two-point objects in classical optical systems.
• Achieving resolutions beyond the classical limit is a key challenge in optical imaging.

Purpose of the Study:

• To demonstrate sub-Rayleigh resolution imaging in a telecentric system.
• To achieve orientation-selective imaging by controlling light coherence.
• To validate the proposed method through experimental demonstration.

Main Methods:

• Utilizing a telecentric imaging system.
• Employing partially coherent illumination with a lattice-like spatial coherence distribution.
• Engineering the symmetry of the coherence lattice to control imaging orientation.
• Conducting a proof-of-principle experiment using a 1951 USAF resolution target.

Main Results:

• Sub-Rayleigh resolution was successfully achieved.
• Orientation-selective imaging was demonstrated by manipulating the coherence lattice.
• Experimental validation confirmed the capability for high-resolution imaging beyond the Rayleigh limit.

Conclusions:

• Spatial coherence engineering of partially coherent light enables flexible, orientation-selective sub-Rayleigh imaging.
• This approach offers a pathway to overcome classical resolution limits in optical imaging.
• The demonstrated technique has potential applications in advanced microscopy and metrology.