GB1522681A - Optical modulation devices - Google Patents
Optical modulation devicesInfo
- Publication number
- GB1522681A GB1522681A GB49675A GB49675A GB1522681A GB 1522681 A GB1522681 A GB 1522681A GB 49675 A GB49675 A GB 49675A GB 49675 A GB49675 A GB 49675A GB 1522681 A GB1522681 A GB 1522681A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alignment
- electrodes
- light
- corners
- field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
Abstract
1522681 Controlling light NATIONAL RESEARCH & DEVELOPMENT CORP 30 Dec 1975 [6 Jan 1975 26 June 1975] 496/75 and 27180/75 Heading G2F Nematic liquid crystal material with positive dielectric aristropy in a layer of thickness sufficient for surface introduction alignment effects to be unable to extend through its entire volume is selectively subjected either to a first field producing substantially uniform unidirectional molecular alignment, or to a second field producing a molecular alignment which provides a refractive index gradient capable of refracting light with a polarization direction in a plane containing the gradient, whereby the light may be deflected (e.g. the alignment of Fig. 3) or focused, Fig. 4. The alignments of Figs. 3 and 4 are obtained using four electrodes (at the corners of the figures) with the polarities shown. A magnetic field may be used in lieu of the electric field. An arrangement comprising eight electrodes at the corners of a cube, e.g. for two-dimensional deflection, is described. Instead of using spaced electrodes, potentials may be applied to each end of a resistive electrode strip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB49675A GB1522681A (en) | 1975-01-06 | 1975-01-06 | Optical modulation devices |
| US05/646,834 US4066334A (en) | 1975-01-06 | 1976-01-05 | Liquid crystal light deflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB49675A GB1522681A (en) | 1975-01-06 | 1975-01-06 | Optical modulation devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1522681A true GB1522681A (en) | 1978-08-23 |
Family
ID=9705372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB49675A Expired GB1522681A (en) | 1975-01-06 | 1975-01-06 | Optical modulation devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1522681A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2184560A (en) * | 1985-12-18 | 1987-06-24 | Gen Electric Co Plc | Apparatus for deflecting a beam of light |
-
1975
- 1975-01-06 GB GB49675A patent/GB1522681A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2184560A (en) * | 1985-12-18 | 1987-06-24 | Gen Electric Co Plc | Apparatus for deflecting a beam of light |
| GB2184560B (en) * | 1985-12-18 | 1990-06-20 | Gen Electric Plc | Apparatus for deflecting a beam of light |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |