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Incoherent bandpass spatial filtering with longitudinal periodicity.

T C Poon, G Indebetouw

|June 23, 2010

Summary

This summary is machine-generated.

This study demonstrates bandpass filtering with longitudinal periodicity in incoherent systems. A two-pupil system using Fresnel zone plates enables this spatial filtering effect.

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Area of Science:

Optics and Photonics
Wave Phenomena

Background:

Incoherent optical systems typically lack longitudinal periodicity in their filtering characteristics.
Achieving controlled spatial filtering in the longitudinal dimension is a challenge.

Purpose of the Study:

To investigate the feasibility of bandpass filtering with longitudinal periodicity in incoherent systems.
To derive the conditions necessary for achieving longitudinally periodic spatial filtering.

Main Methods:

Theoretical derivation of the necessary conditions for longitudinally periodic spatial filtering.
Analysis of a two-pupil system employing Fresnel zone plates.

Main Results:

A necessary condition for achieving longitudinally periodic spatial filtering was successfully derived.
The study confirmed that bandpass filtering with longitudinal periodicity is achievable.
This effect was demonstrated in a specific two-pupil configuration using Fresnel zone plates with a small opening ratio.

Conclusions:

Bandpass filtering with longitudinal periodicity is possible in incoherent optical systems.
The proposed two-pupil system with specific Fresnel zone plates offers a practical method for realizing this phenomenon.