Optical edge detection with adjustable resolution based on cascaded Pancharatnam-Berry lenses

We designed a versatile optical edge detection setup with two cascaded Pancharatnam-Berry lenses (PBLs) placed at the Fourier plane of a 4f system. When the two PBLs are parallel and close to each other, owing to the moiré-like effect, one-dimensional edge detection with adjustable resolution is ach...

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Veröffentlicht in:Optics letters 2023-07, Vol.48 (14), p.3801-3804
Hauptverfasser: Tu, Yingnan, Li, Ruijian, Xiong, Zhenyu, Wu, Hao, Ren, Yuan, Liu, Zhengliang, Sun, Rusheng, Liu, Tong
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container_end_page 3804
container_issue 14
container_start_page 3801
container_title Optics letters
container_volume 48
creator Tu, Yingnan
Li, Ruijian
Xiong, Zhenyu
Wu, Hao
Ren, Yuan
Liu, Zhengliang
Sun, Rusheng
Liu, Tong
description We designed a versatile optical edge detection setup with two cascaded Pancharatnam-Berry lenses (PBLs) placed at the Fourier plane of a 4f system. When the two PBLs are parallel and close to each other, owing to the moiré-like effect, one-dimensional edge detection with adjustable resolution is achieved by introducing a transverse displacement of one PBL. Furthermore, two-dimensional edge detection with adjustable resolution can also be realized by tuning the longitudinal distance between the PBLs, and the transverse displacement is exploited to adjust the edge resolution in specified directions. The proposed scheme is verified by a proof-of-principle experiment in which the resolution-adjustable edges of different targets and cells were clearly observed, showing its flexibility and potential application in image processing and high-contrast microscopy.
doi_str_mv 10.1364/OL.485436
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subjects Edge detection
Image contrast
Image processing
Image Processing, Computer-Assisted
Lens, Crystalline
Lenses
Microscopy
title Optical edge detection with adjustable resolution based on cascaded Pancharatnam-Berry lenses
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