What is it about?
In contrast to traditional phase diversity, we propose a modified version of single-shot quasi-phase-diversity wavefront sensing using a multifocal Fibonacci zone-plate module. The Fibonacci zone plate was designed to generate a specific separation distance between the in-focus and defocuseded diffraction planes, enables recording multiplanar diffraction patterns at a given position under a single exposure. Thus, this modified wavefront sensing can improve recovery accuracy and realize real-time measurements via a single exposure.
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Why is it important?
(1)The proposed single-shot QPD based on a multifocal Fibonacci zone-plate module for a telescope structure can retrieve quantitative wavefront distributions in real time. (2) The designed multifocal Fibonacci zone plate has a fixed separation distance betweent the in-focus and defocused diffraction planes and can simultaneously realize multiplanar diffraction patterns at a given position. (3) This method can place recorder in the nonfoacl plane position, which gives it potential applications in high-power laser device without fear of damage to the recorder target by foacl-plane energy.
Perspectives
QPD wavefront sensor is a means for conducting quantitatively wavefront measurements and image restoration from several desired intensity measurements. It has great potential for the fields of x-ray imaging and terahertz detection.
Xiuping Zhang
Read the Original
This page is a summary of: Single-shot quasi-phase-diversity wavefront sensing with a Fibonacci zone-plate module, Applied Physics Letters, July 2023, American Institute of Physics,
DOI: 10.1063/5.0157109.
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