Back to results
US 2020/0050076 A1Published application
Lc beam broadening device with improved beam symmetry
AssigneeLensvector Inc.
InventorsTigran Galstian, Vladimir Presniakov, Karen Asatryan, Armen Zohrabyan
Life of this patent
Estimating the term…
Abstract
Liquid crystal light beam broadening devices and their manufacture are described. Beneficial aspects of beam broadening devices employed for controlled illumination and architectural purposes are presented including providing symmetric beam broadening, improving the beam intensity profile, beam divergence preconditioning and improving projected beam intensity uniformity. Both beam control devices having in-plane and homeotropic ground state liquid crystal alignment are presented.
Claims11
A liquid crystal (LC) beam broadening device comprising:
- a first LC sandwich having LC material contained within opposed front and back first substrates to have a homeotropic ground state orientation, the front and the back first substrates each having an arrangement of parallel electrode segments, wherein the segments on the front first substrate extend orthogonally to the segments on the back first substrate;
- a second LC sandwich having LC material contained within opposed front and back second substrates to have a homeotropic ground state orientation, the front and the back second substrates each having an arrangement of parallel electrode segments, wherein the segments on the front second substrate extend orthogonally to the segments on the back second substrate;
- and
- wherein the electrode segments of said first LC sandwich are rotationally offset from being parallel or orthogonal with respect to the electrode segments of said second LC sandwich by about 2 to about 8 degrees.
1 more element
A liquid crystal (LC) beam broadening device comprising:
- a first LC sandwich having LC material contained within opposed front and back first substrates to have a homeotropic ground state orientation, the front and the back first substrates each having an arrangement of parallel electrode segments, wherein the segments on the front first substrate extend orthogonally to the segments on the back first substrate;
- a second LC sandwich having LC material contained within opposed front and back second substrates to have a homeotropic ground state orientation, the front and the back second substrates each having an arrangement of parallel electrode segments, wherein the segments on the front second substrate extend orthogonally to the segments on the back second substrate;
- a third LC sandwich having LC material contained within opposed front and back first substrates to have a homeotropic ground state orientation, the front and the back first substrates each having an arrangement of parallel electrode segments, wherein the segments on the front first substrate extend orthogonally to the segments on the back first substrate;
- a fourth LC sandwich having LC material contained within opposed front and back second substrates to have a homeotropic ground state orientation, the front and the back second substrates each having an arrangement of parallel electrode segments, wherein the segments on the front second substrate extend orthogonally to the segments on the back second substrate;
- and
- wherein the electrode segments of said first LC sandwich are rotationally offset from being parallel or orthogonal with respect to the electrode segments of said second LC sandwich by 0 to about 8 degrees, the electrode segments of said third LC sandwich are rotationally offset from being parallel or orthogonal with respect to the electrode segments of said fourth LC sandwich by 0 to about 8 degrees, and the electrode segments of said second LC sandwich are rotationally offset with respect to the electrode segments of said third LC sandwich by approximately 45 degrees.
3 more elements
A liquid crystal (LC) beam broadening device comprising:
- four LC cells each having LC material contained within opposed front and back substrates to have a planar aligned ground state orientation, at least one of said substrates having an arrangement of parallel electrode segments for creating a spatial variation of LC orientation within the cells, one each of said four LC cells for each of two polarizations and for each of two orthogonal parallel electrode orientation;
- wherein the electrode segments of at least one of said LC cells are rotationally offset from being parallel or orthogonal with respect to the electrode segments of at least one other of said LC cell by about 2 to about 8 degrees.
Dependencies are inferred from the claim text.