Patent US5301045A successfully refreshed from Google Patents.
US5301045A
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Helical liquid crystalline element which produces linear polarized light
Assignee: Wacker Chemie AG
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Filing: 1992-10-15
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Granted: 1994-04-05
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Expires: 2012-10-15
Abstract
Abstract The invention relates to optical elements based on helical liquid-crystalline substances, having reflection bands of linear-polarized light, and to a process for preparing the same. The optical elements of this invention contain only one optically effective component based on helical liquid-crystalline substances. They reflect light incident perpendicular to the surface in a linear-polarized manner parallel to the direction of incidence of the incident light. The process for preparing the optical elements comprises illuminating a helical liquid-crystalline substance which contains at least one photoisomerizable substance with linear-polarized light in such a manner that this substance is subsequently aligned so that it exhibits at least one reflection band of linear-polarized light on illumination. Suitable helical liquid-crystalline substances are in particular organopolysiloxanes. The optical elements are suitable, for example, for data storage.
Inventors
- 👤 Alfred Miller
- 👤 Franz-Heinrich Kreuzer
- 👤 Horst Leigeber
- 👤 Christoph Brauchle
- 👤 Andreas Petri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:51
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3016; C; C09; C09K; C09K19/00; C09K19/04; C09K19/40; C09K19/406; C09K19/408; G11; G11B; G11B7/00; G11B7/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
38 words
An optical element containing only one optically effective component based on helical liquid-crystalline substances, and said element reflects light incident perpendicular to the surface in a linear-polarized manner parallel to the direction of incidence of the incident light.
Claim 2
Dependent Claim
38 words
An optical element containing only one optically effective component based on helical liquid-crystalline substances, and said element reflects light incident perpendicular to the surface in a linear-polarized manner parallel to the direction of incidence of the incident light.
Claim 3
Dependent Claim
15 words
The optical element of claim 1, wherein said element is used as a linear polarizer.
Claim 4
Dependent Claim
15 words
The optical element of claim 1, wherein said element is used as a line filter.
Claim 5
Dependent Claim
16 words
The optical element of claim 1, wherein said element is used in an optical storage system.
Claim 6
Dependent Claim
14 words
The optical element of claim 1, wherein said element is used as a reflector.
Claim 7
Dependent Claim
47 words
An optical element containing only one optically effective component based on helical liquid-crystalline substances, and said element is obtained by illuminating a helical liquid-crystalline substance with linear-polarized light such that said substance is subsequently aligned to exhibit at least one reflection band of linear-polarized light upon illumination.
Claim 8
Dependent Claim
47 words
An optical element containing only one optically effective component based on helical liquid-crystalline substances, and said element is obtained by illuminating a helical liquid-crystalline substance with linear-polarized light such that said substance is subsequently aligned to exhibit at least one reflection band of linear-polarized light upon illumination.
Claim 9
Dependent Claim
78 words
A process for preparing an optical element containing only one optically effective component based on helical liquid-crystalline substances, and said element reflects light incident perpendicular to the surface in a linear-polarized manner parallel to the direction of incidence of the incident light, which comprises illuminating a helical liquid-crystalline substance which contains at least one photoisomerizable compound with linear-polarized light such that said substance is subsequently aligned to exhibit at least on refection band of linear-polarized light upon illumination.
Claim 10
Dependent Claim
78 words
A process for preparing an optical element containing only one optically effective component based on helical liquid-crystalline substances, and said element reflects light incident perpendicular to the surface in a linear-polarized manner parallel to the direction of incidence of the incident light, which comprises illuminating a helical liquid-crystalline substance which contains at least one photoisomerizable compound with linear-polarized light such that said substance is subsequently aligned to exhibit at least on refection band of linear-polarized light upon illumination.
Claim 11
Dependent Claim
15 words
The process of claim 7, wherein the helical liquid-crystalline substance is a helical liquid-crystalline organopolysiloxane.
Claim 12
Dependent Claim
22 words
The process of claim 7, wherein the helical liquid-crystalline substance is a helical liquid-crystalline organopolysiloxane containing mesogenic radicals in the side chain.
Claim 13
Dependent Claim
35 words
The process of claim 7, wherein the absorption characteristics of the compound and the wavelength of the linear-polarized light are matched such that the spectrum of the light and the absorption of the dye overlap.
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| 3.5 Years (Year 4) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
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