Abstract: An electromagnetic source has an electrode structure coupled to a substrate. The electrode structure has interspaced electrodes, at least one of which is spiral-shaped. At least one electrical contact interconnects the electrodes of the electrode structure. The electrode structure is responsive to an applied electrical current to generate a spatially non-uniform magnetic field. This field can act on a LC layer such that optical properties of the layer are controllable.
Type:
Application
Filed:
June 22, 2009
Publication date:
January 14, 2010
Applicant:
LENSVECTOR INC.
Inventors:
Tigran GALSTIAN, Karen ASATRIAN, Amir TORK, Vladimir PRESNIAKOV, Armen ZOHRABYAN, Aram BABRAMYAN
Abstract: A tunable-focusing liquid crystal lens (TLCL) cell has a liquid crystal layer arranged within a cell gap defined between substrates, a layer of optically transparent material arranged between the first substrate and the LC layer, and a liquid crystal alignment layer arranged between the optically transparent layer and the LC layer. The alignment layer is provided on a third optically transparent substrate having a non-planar shape for giving a non-planar profile to the LC layer, which substrate is obtained from a flexible sheet initially provided with the alignment layer and then formed into the non-planar shape. The lens further has a first optically transparent electrode provided on the second substrate, a second optically transparent electrode provided on either or both of first and third substrates. The electrodes are arranged to generate an electric field acting on the LC layer to change the focal distance of the LC cell.
Type:
Application
Filed:
June 19, 2009
Publication date:
December 24, 2009
Applicant:
LENSVECTOR INC.
Inventors:
Vladimir PRESNIAKOV, Tigran GALSTIAN, Karen ASATRYAN, Amir TORK, Aram BAGRAMYAN, Armen ZOHRABYAN
Abstract: A tunable optical imaging system uses a fixed lens and a tunable liquid crystal lens that is operated only outside of an operational range of high aberration. A voltage range applied to change the optical power of the liquid crystal lens is limited to a continuous tunable range of low aberration. The relative positioning between the lens and a corresponding photodetector, and the relative lens powers of a fixed lens and the tunable lens, may be selected to compensate for any optical power offsets resulting from the limitation of the voltage range of the tunable lens. The lens may be operated in either positive tunability or negative tunability mode.
Type:
Application
Filed:
February 25, 2009
Publication date:
August 27, 2009
Applicant:
LENSVECTOR INC.
Inventors:
Tigran GALSTIAN, Karen ASATRYAN, Vladimir PRESNIAKOV, Armen ZOHRABYAN, Amir TORK, Aram BAGRAMYAN