Robust optical edge detection enabled by a twisted
reflective q-plate
Posted on 2023-11-18 - 20:16
Optical edge detection significantly reduces the image information load and is highly sought after in instant image processing. Robustness to the wavelength and polarization of light as well as mechanical vibration is a key requirement for practical applications. Here, a robust optical edge detector is proposed and demonstrated based on a reflective twisted liquid crystal q-plate. The device is composed of a mirror and a 1.46-μm-thick liquid crystal layer with a twist angle of 69.2°. The backtracking of the light inside the twisted medium forms a mirror symmetric twisted design and thus leads to a broadband self-compensated spiral phase modulation. By this means, an optical edge detector with excellent wavelength and polarization independence is presented for both coherent and incoherent light sources. Additionally, the reflective design makes the system more compact and stable. This work supplies a practical design for robust optical edge detection, which may upgrade existing image processing techniques.
CITE THIS COLLECTION
CHEN, QUANMING; Cao, Han; Ouyang, Cheng; Shen, Yanchun; Hu, Wei (2023). Robust optical edge detection enabled by a twisted
reflective q-plate. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.6896992.v2
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AUTHORS (5)
QC
QUANMING CHEN
HC
Han Cao
CO
Cheng Ouyang
YS
Yanchun Shen
WH
Wei Hu