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ABSTRACT
An electrically tunable liquid crystal (LC) lens with dual hole-patterned electrodes is demonstrated. When the LC lens is operated at low voltages, the dual hole-patterned electrodes with different diameters impart the lens with a coaxial bifocal characteristic. At high voltages, the proposed LC lens functions as a conventional lens with a single focal length but with a switchable optical aperture. The demonstrated LC lens is free of disclination lines because of the presence of voltage-assisted high pretilt angles created from the upmost hole-patterned electrode with small diameter.
GRAPHICAL ABSTRACT
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Funding
This work was supported by the Ministry of Science and Technology of the Republic of China, Taiwan [contract numbers Most 101-2112-M-018-002-MY3, 104-2811-M-018-001 and 103-2622-E-018-007-CC3].