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Single-pixel spiral phase contrast imaging.

Yifan Liu, Panpan Yu, Xinyao Hu

|July 16, 2020

Summary

This summary is machine-generated.

We developed single-pixel spiral phase contrast imaging for optical edge detection. This method directly captures object details for both amplitude and phase objects using Fourier spectrum analysis.

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Area of Science:

Optical Imaging
Image Processing
Metrology

Background:

Traditional optical imaging techniques often struggle with simultaneous edge detection of both amplitude and phase objects.
Edge detection is crucial for analyzing object structures in various scientific and industrial applications.

Purpose of the Study:

To introduce a novel single-pixel spiral phase contrast imaging technique.
To demonstrate its capability for isotropic optical edge detection of both amplitude and phase objects.

Main Methods:

Utilizes single-pixel detection to acquire the object's Fourier spectrum.
Employs spiral phase-encoded plane waves scanned in k-space for spectrum sampling.
Leverages a digital micromirror device for wave generation and a single-pixel detector with four-step phase-shifting.

Main Results:

Successfully demonstrated optical edge detection for digital and real objects.
Verified isotropic edge detection capabilities for both amplitude and phase contrast.
Directly obtained edge information by applying an inverse Fourier transform to the acquired spectrum.

Conclusions:

The proposed single-pixel spiral phase contrast imaging offers an effective method for isotropic edge detection.
This technique provides a direct approach to acquiring edge information from complex objects.