The thickness of a liquid crystal (LC) cell is one of the main parameters of liquid crystal devices (LCD). This paper proposes a measurement method based on the multiple-beam interference between the ...

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The structures were made from a liquid crystal cell as well as a liquid crystal polymer — both of which are standard materials in the development of lenses intended for holographic imaging uses.

In the cell, the liquid crystal layer is sandwiched between two transparent substrates, creating a 2D material. When a voltage is applied across the cell, the molecules align along the electric field.

The liquid crystal cell layer also enables the bifocal lenses to rapidly change foci intensity in response to an external voltage. Previously developed bifocal lenses required mechanical rotation ...