Liquid crystal phase modulation device

US11927863B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Benoit Racine · Grenoble, FR
• Arnaud Verdant · Meylan, FR
• Pierre Joly · Edinburgh, GB

Key dates

• Filing date: Dec 14, 2022
• Grant date: Mar 12, 2024
• Expiry date: Dec 14, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2203/50
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A device for modulating the phase of a light beam includes a matrix of elementary cells, called pixels, coupled to a circuit for addressing the pixels, the device further comprising a set of so-called lateral electrodes extending in a so-called vertical direction (Y) at right angles to the alignment direction (Xa) and configured to apply, for each pixel and via at least two lateral electrodes, a so-called acceleration voltage generating a lateral electrical field (Era) substantially parallel to the alignment direction, in a vector allowing an accelerated return of the liquid crystal molecules to their orientation of rest, the acceleration voltage being configured to be applied in a phase called acceleration relaxation phase, when the activation voltage is no longer applied.