Biaxial crystal filter for viewing devices
An optical lens is provided which comprises at least one layer of a birefringent material wherein the birefringent material has a crystal structure formed by at least one polycyclic organic compound with conjugated π-system, and an intermolecular spacing of 3.4±0.3 Å is in the direction of at least one of optical axes.
1 . An optical lens comprising:
at least one layer of a birefringent material
wherein the birefringent material has a crystal structure formed by at least one polycyclic organic compound with conjugated α-system, and an intermolecular spacing of 3.4±0.3 Å is in the direction of at least one of optical axes.
2 . A viewing device comprising:
at least one biaxial thin crystal film.
3 . The viewing device of claim 2 , wherein the biaxial crystal film is a color filter.
4 . The viewing device of claim 2 , wherein the biaxial crystal film is a polarizer characterized by the imaginary (K 1 , K 2 , K 3 ) and the real (n 1 , n 2 , n 3 ) parts of the complex refraction index, which satisfy the conditions K 1 ≧K 2 >K 3 , and (n 1 +n 2 )/2>n 3 .
5 . The viewing device of claim 2 , wherein the biaxial crystal film is a UV filter.
6 . The viewing device of claim 2 , wherein the biaxial crystal film of color filter, e-polarizer and a UV filter.
7 . The viewing device of claim 2 , wherein the biaxial crystal film is a UV-cut filter.
8 . The viewing device of any one of claims 2 to 6 , wherein biaxial thin crystal film is being made by means of Cascade Crystallization Process and characterized by a globally ordered structure with an intermolecular spacing of 3.4±0.3 Å in the direction of one of optical axes, and is formed by rodlike supramolecules, which represent at least one polycyclic organic compound with a conjugated π-system and ionogenic groups.
9 . The viewing device of claim 8 , wherein molecules of at least one organic compound material contain heterocycles.
10 . The viewing device of any one of claims 8 or 9 , wherein the biaxial thin crystal film is made of a lyotropic liquid crystal based on at least one dichroic dye.
11 . A visible range photochromic polarizer comprising a photochromic film, and an absorptive UV polarizer positioned on top of it and before the photochromic film on a way of UV light path.
12 . A visible range photochromic polarizer of claim 11 , wherein an absorptive UV polarizer comprising at least one layer of a birefringent material having a crystal structure formed by at least one polycyclic organic compound with conjugated α-system, and an intermolecular spacing of 3.4±0.3 Å is in the direction of at least one of optical axes.