METHOD OF FORMATION OF TWO-BRIDGE VORTEX LIGHT FIELDS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC G02F1/133 

FIELD: physics.

SUBSTANCE: this device is related to optical technology and is intended for the formation of two-lobed vortex light fields. A transparent high-resistance coating is applied to each of the first and second transparent substrates; opaque low-resistance coatings connected to the transparent high-resistance coating are applied to the opposite edges of each of the transparent substrates, thereby forming two contact electrodes on each of the transparent substrates so that the edges of these electrodes facing each other on any of the transparent substrates are parallel; the transparent high-resistance coating and contact electrodes are divided in the second transparent substrate in the middle of the edges of these contact electrodes perpendicularly facing each other, thereby forming a non-conductive transparent strip and four contact electrodes; an orienting coating is applied to a high-resistance transparent coating and contact electrodes on each of the transparent substrates; have transparent substrates at the predetermined distance from one another with the sides facing each other with orienting coatings so that the non-conductive transparent strip on the second transparent substrate was parallel to the edges of the contact electrodes on the first transparent substrate; the layer of nematic liquid crystal between transparent substrates is placed; variable potentials are supplied to the contact electrodes on both transparent substrates to form a voltage distribution with equipotential lines in the form of concentric circles at the given shift of the centers of these circles between high-resistance coatings on different transparent substrates and to form a jump in the phase delay profile of the nematic liquid crystal layer with respect to the non-conducting transparent strip, which ensures the formation of vortex two-bladed light fields with rotation of the intensity distribution during their propagation.

EFFECT: expansion of the arsenal of technical means, ensuring high energy efficiency, the width of the working spectral range and the manufacturability of the device and its control system.

6 cl, 9 dwg