WO1997046908A1 - Interferenzfilter auf der basis von porösem silicium - Google Patents
Interferenzfilter auf der basis von porösem silicium Download PDFInfo
- Publication number
- WO1997046908A1 WO1997046908A1 PCT/DE1997/001117 DE9701117W WO9746908A1 WO 1997046908 A1 WO1997046908 A1 WO 1997046908A1 DE 9701117 W DE9701117 W DE 9701117W WO 9746908 A1 WO9746908 A1 WO 9746908A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- refractive index
- substance
- pores
- layer
- component
- 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.)
- Ceased
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
- G02F1/01—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
- G02F1/21—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 by interference
-
- 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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
Definitions
- the invention relates to an interference filter or a component with an interference filter function based on porous material, in particular silicon, according to the preamble of claim 1.
- interference filters with the desired reflection or transmission properties can be produced, as from MG Berger et al. , in Optical interference coatings, Florin Abeles ed., Proc. SPIE 2253, 865 (1994).
- a so-called Bragg reflector was produced, which on the one hand has a very high reflectivity for certain colors in the visible spectral range and on the other hand practically does not reflect other colors.
- a disadvantage of the known components with interference filter function is that this function is determined by the manufacturing constraints.
- the pores in the PS are filled with a substance which can change its refractive index under the influence of an electric field.
- liquid crystals are preferably considered as a suitable material, which have birefringent properties and whose refractive index can be changed or adjusted by reorienting the molecular chains in an electric field.
- a computer chip in particular as an interference filter, can be formed, for example, which consists of an arrangement, in particular of a matrix, of a plurality of reflection filters, preferably for the three primary colors red, green and
- a projection display for example for imaging devices, such as e.g. a monitor or TV set.
- porous silicon consists of a spongy structure of silicon crystallites, which is pervaded by pores.
- the PS appears to the light as a homogeneous material ("effective medium") and its properties are described by the specification of an effective refractive index, which is one of the refractive indices of the silicon Crystallites and the volume fraction of the pores (porosity) depends.
- the pores of the PS are filled with a substance which changes its refractive index through the application of an electrical voltage or under the influence of an electrical field (for example liquid crystals).
- an electrical field for example liquid crystals.
- the change in the refractive index of the substance under the influence of an electric field can take place both continuously and abruptly. It is also possible that, as in the case of liquid crystals, the refractive index can only be determined for certain by the alignment of molecular chains Propagation of the light changes
- the rest of the invention is not limited to PS as a material with pores. Rather, other porous materials are also conceivable, which are filled with suitable material.
- Fig. 1 inventive component with a
- Fig. 4 several interference filters according to the invention to form a reflection display
- FIG. 1 The filter structure according to the invention is shown in FIG. 1
- a layer sequence with successive layers is produced.
- An anti-reflection layer is formed on a substrate.
- the layer system made of PS which can be controlled with the applied electrical voltage and has different porosity in the individual layers.
- the number of PS layers can be chosen to be more or less large, for example 60.
- the electrically generated change in the refractive index of the substance causes a more or less strong change in the effective refractive index of the porous, depending on its respective volume fraction (ie porosity) Layer.
- a special choice of the refractive indices of the porous silicon skeleton and the substance filled into the pores is appropriate.
- the refractive index n of the silicon skeleton can be changed, for example by oxidation.
- the end result can then be a layer system made of porous glass (Si0 2 ).
- the refractive index of the filled substance corresponds to that of the silicon or SiO 2 crystallites at at least one specific voltage (eg when voltage is applied)
- the effective refractive index of a layer is no longer dependent on the volume fraction of the substance.
- the layer system loses its filtering effect since each individual layer now has the same refractive index.
- the course of the refractive index over the layer depth for such a case is shown in FIG.
- the dashed curve represents the case of applied voltage.
- the reflection spectrum shown above in FIG. 3 then results for the values assumed in the example in FIG. It has a low reflectivity over the entire spectral range shown.
- the low oscillations are caused by interference across the entire sample thickness.
- the refractive index of the substance in the pores changes to large values and deviates from that of the silicon or Si0 2 crystallites. Due to the different volume proportions of the substance in porous layers with different porosity, there is an overall greater change in the refractive index for those layers with high porosity. The course of the refractive index over the depth of the layer which results in the stress-free case consequently leads to the further reflection spectrum shown in the lower part of FIG. A very high reflectivity results for a certain wavelength, which is predetermined, for example, by the choice of the core formation parameters of the layer system.
- the tension-free r-nil shows a green color impression of the layer system when the layer system appears black when the voltage is applied.
- Such electrically changeable interference filters can be used, for example, in m reflection displays or also for color-selective detectors with high spectral sensitivity.
- the structure of a reflection display is shown schematically in FIG. 4, which results, for example, by assembling a plurality of interference filter functions in a matrix shape on a single substrate:
- White light is given to the electrically variable interference filters.
- the individual filters according to the invention can be controlled separately or together, so that em is formed on the projection screen from the sum of the individual reflections
- Point of light m of the desired color is displayed.
- a matrix of such filter layers thus forms a reflection display, which can display colored images on the projection screen.
- the color can be changed or adjusted in this way and the desired pixel can thus be obtained.
- an overall image to be formed from many such pixels, such as a screen with reflection can be obtained.
- porous SiGe or GaAs or other materials are also conceivable for forming the invention.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97925897A EP0902909B1 (de) | 1996-06-05 | 1997-05-30 | Interferenzfilter auf der basis von porösem silicium |
| JP10500097A JP2000514568A (ja) | 1996-06-05 | 1997-05-30 | 多孔質珪素をベースとする干渉膜フィルター |
| DE59708379T DE59708379D1 (de) | 1996-06-05 | 1997-05-30 | Interferenzfilter auf der basis von porösem silicium |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996122748 DE19622748A1 (de) | 1996-06-05 | 1996-06-05 | Interferenzfilter auf der Basis von porösem Silicium |
| DE19622748.8 | 1996-06-05 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/693,886 Continuation US6489733B1 (en) | 1998-04-21 | 2000-10-23 | Multi-purpose lighting system for airports, roads or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997046908A1 true WO1997046908A1 (de) | 1997-12-11 |
Family
ID=7796317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1997/001117 Ceased WO1997046908A1 (de) | 1996-06-05 | 1997-05-30 | Interferenzfilter auf der basis von porösem silicium |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0902909B1 (de) |
| JP (1) | JP2000514568A (de) |
| DE (2) | DE19622748A1 (de) |
| WO (1) | WO1997046908A1 (de) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19921190A1 (de) * | 1999-05-07 | 2000-11-16 | Forschungszentrum Juelich Gmbh | Verfahren zur Herstellung eines Elements mit porosidiertem Material |
| US8054532B2 (en) | 1994-05-05 | 2011-11-08 | Qualcomm Mems Technologies, Inc. | Method and device for providing illumination to interferometric modulators |
| US8094362B2 (en) | 2004-03-06 | 2012-01-10 | Qualcomm Mems Technologies, Inc. | Method and system for color optimization in a display |
| US8848294B2 (en) | 2010-05-20 | 2014-09-30 | Qualcomm Mems Technologies, Inc. | Method and structure capable of changing color saturation |
| US8861071B2 (en) | 2004-09-27 | 2014-10-14 | Qualcomm Mems Technologies, Inc. | Method and device for compensating for color shift as a function of angle of view |
| US8872085B2 (en) | 2006-10-06 | 2014-10-28 | Qualcomm Mems Technologies, Inc. | Display device having front illuminator with turning features |
| US8902484B2 (en) | 2010-12-15 | 2014-12-02 | Qualcomm Mems Technologies, Inc. | Holographic brightness enhancement film |
| US8928967B2 (en) | 1998-04-08 | 2015-01-06 | Qualcomm Mems Technologies, Inc. | Method and device for modulating light |
| US8971675B2 (en) | 2006-01-13 | 2015-03-03 | Qualcomm Mems Technologies, Inc. | Interconnect structure for MEMS device |
| US8979349B2 (en) | 2009-05-29 | 2015-03-17 | Qualcomm Mems Technologies, Inc. | Illumination devices and methods of fabrication thereof |
| US9019183B2 (en) | 2006-10-06 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Optical loss structure integrated in an illumination apparatus |
| US9019590B2 (en) | 2004-02-03 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Spatial light modulator with integrated optical compensation structure |
| US9025235B2 (en) | 2002-12-25 | 2015-05-05 | Qualcomm Mems Technologies, Inc. | Optical interference type of color display having optical diffusion layer between substrate and electrode |
| US9110289B2 (en) | 1998-04-08 | 2015-08-18 | Qualcomm Mems Technologies, Inc. | Device for modulating light with multiple electrodes |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7907319B2 (en) | 1995-11-06 | 2011-03-15 | Qualcomm Mems Technologies, Inc. | Method and device for modulating light with optical compensation |
| DE19757321A1 (de) * | 1997-12-23 | 1999-07-01 | Forschungszentrum Juelich Gmbh | Optische Komponente und Verwendung einer Beschichtung für eine solche Komponente |
| AU3477600A (en) * | 1999-02-01 | 2000-08-18 | Mcnc | A tunable electrooptic interference filter and method of manufacturing same |
| RU2379725C2 (ru) * | 2004-02-03 | 2010-01-20 | АйДиСи, ЭлЭлСи | Пространственный модулятор света с интегрированной оптической компенсационной структурой |
| US7706050B2 (en) | 2004-03-05 | 2010-04-27 | Qualcomm Mems Technologies, Inc. | Integrated modulator illumination |
| US7508571B2 (en) | 2004-09-27 | 2009-03-24 | Idc, Llc | Optical films for controlling angular characteristics of displays |
| US7898521B2 (en) | 2004-09-27 | 2011-03-01 | Qualcomm Mems Technologies, Inc. | Device and method for wavelength filtering |
| US7710636B2 (en) | 2004-09-27 | 2010-05-04 | Qualcomm Mems Technologies, Inc. | Systems and methods using interferometric optical modulators and diffusers |
| US7807488B2 (en) | 2004-09-27 | 2010-10-05 | Qualcomm Mems Technologies, Inc. | Display element having filter material diffused in a substrate of the display element |
| US7349141B2 (en) | 2004-09-27 | 2008-03-25 | Idc, Llc | Method and post structures for interferometric modulation |
| US7928928B2 (en) | 2004-09-27 | 2011-04-19 | Qualcomm Mems Technologies, Inc. | Apparatus and method for reducing perceived color shift |
| US7561323B2 (en) | 2004-09-27 | 2009-07-14 | Idc, Llc | Optical films for directing light towards active areas of displays |
| US7355780B2 (en) | 2004-09-27 | 2008-04-08 | Idc, Llc | System and method of illuminating interferometric modulators using backlighting |
| US7911428B2 (en) | 2004-09-27 | 2011-03-22 | Qualcomm Mems Technologies, Inc. | Method and device for manipulating color in a display |
| US7813026B2 (en) | 2004-09-27 | 2010-10-12 | Qualcomm Mems Technologies, Inc. | System and method of reducing color shift in a display |
| US8362987B2 (en) | 2004-09-27 | 2013-01-29 | Qualcomm Mems Technologies, Inc. | Method and device for manipulating color in a display |
| US7710632B2 (en) | 2004-09-27 | 2010-05-04 | Qualcomm Mems Technologies, Inc. | Display device having an array of spatial light modulators with integrated color filters |
| US7603001B2 (en) | 2006-02-17 | 2009-10-13 | Qualcomm Mems Technologies, Inc. | Method and apparatus for providing back-lighting in an interferometric modulator display device |
| US8004743B2 (en) | 2006-04-21 | 2011-08-23 | Qualcomm Mems Technologies, Inc. | Method and apparatus for providing brightness control in an interferometric modulator (IMOD) display |
| US7845841B2 (en) | 2006-08-28 | 2010-12-07 | Qualcomm Mems Technologies, Inc. | Angle sweeping holographic illuminator |
| US7855827B2 (en) | 2006-10-06 | 2010-12-21 | Qualcomm Mems Technologies, Inc. | Internal optical isolation structure for integrated front or back lighting |
| EP2069838A2 (de) | 2006-10-06 | 2009-06-17 | Qualcomm Mems Technologies, Inc. | Beleuchtungsvorrichtung mit eingebautem lichtkoppler |
| WO2008045462A2 (en) | 2006-10-10 | 2008-04-17 | Qualcomm Mems Technologies, Inc. | Display device with diffractive optics |
| US7864395B2 (en) | 2006-10-27 | 2011-01-04 | Qualcomm Mems Technologies, Inc. | Light guide including optical scattering elements and a method of manufacture |
| US7777954B2 (en) | 2007-01-30 | 2010-08-17 | Qualcomm Mems Technologies, Inc. | Systems and methods of providing a light guiding layer |
| US7733439B2 (en) | 2007-04-30 | 2010-06-08 | Qualcomm Mems Technologies, Inc. | Dual film light guide for illuminating displays |
| US8068710B2 (en) | 2007-12-07 | 2011-11-29 | Qualcomm Mems Technologies, Inc. | Decoupled holographic film and diffuser |
| CN101897033B (zh) | 2007-12-17 | 2012-11-14 | 高通Mems科技公司 | 具有干涉式背面掩模的光伏装置及其制造方法 |
| WO2009102733A2 (en) | 2008-02-12 | 2009-08-20 | Qualcomm Mems Technologies, Inc. | Integrated front light diffuser for reflective displays |
| WO2009102731A2 (en) | 2008-02-12 | 2009-08-20 | Qualcomm Mems Technologies, Inc. | Devices and methods for enhancing brightness of displays using angle conversion layers |
| WO2009129264A1 (en) | 2008-04-15 | 2009-10-22 | Qualcomm Mems Technologies, Inc. | Light with bi-directional propagation |
| US8670171B2 (en) | 2010-10-18 | 2014-03-11 | Qualcomm Mems Technologies, Inc. | Display having an embedded microlens array |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4411495A (en) * | 1981-04-15 | 1983-10-25 | Bell Telephone Laboratories, Incorporated | Refractive index switchable display cell |
| DE4319413A1 (de) * | 1993-06-14 | 1994-12-15 | Forschungszentrum Juelich Gmbh | Optoelektronisches und optisches Bauelement |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970129A (en) * | 1986-12-19 | 1990-11-13 | Polaroid Corporation | Holograms |
| US4828888A (en) * | 1987-04-10 | 1989-05-09 | Hoecast Celanese Corporation | Liquid crystalline polymer composites |
| JPH0687185B2 (ja) * | 1990-01-12 | 1994-11-02 | ポラロイド コーポレーシヨン | ミクロボイド中に液晶を含有する三次元位相型ホログラフィック要素、同要素の形成方法および同要素を利用したセル |
| JPH0490510A (ja) * | 1990-08-01 | 1992-03-24 | Seishiro Yoshihara | 表示用複合板 |
| US5469278A (en) * | 1992-09-25 | 1995-11-21 | Matsushita Electric Industrial Co., Ltd. | Liquid crystal panel and viewfinder for video camera and projection display using liquid crystal panel |
| JPH06265854A (ja) * | 1993-03-10 | 1994-09-22 | Seiko Epson Corp | 液晶表示素子 |
| JPH0792505A (ja) * | 1993-09-24 | 1995-04-07 | Nippon Steel Corp | エレクトロクロミックフィルター及びそれを用いた表示装置 |
-
1996
- 1996-06-05 DE DE1996122748 patent/DE19622748A1/de not_active Withdrawn
-
1997
- 1997-05-30 EP EP97925897A patent/EP0902909B1/de not_active Expired - Lifetime
- 1997-05-30 JP JP10500097A patent/JP2000514568A/ja active Pending
- 1997-05-30 DE DE59708379T patent/DE59708379D1/de not_active Expired - Lifetime
- 1997-05-30 WO PCT/DE1997/001117 patent/WO1997046908A1/de not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4411495A (en) * | 1981-04-15 | 1983-10-25 | Bell Telephone Laboratories, Incorporated | Refractive index switchable display cell |
| DE4319413A1 (de) * | 1993-06-14 | 1994-12-15 | Forschungszentrum Juelich Gmbh | Optoelektronisches und optisches Bauelement |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8054532B2 (en) | 1994-05-05 | 2011-11-08 | Qualcomm Mems Technologies, Inc. | Method and device for providing illumination to interferometric modulators |
| US9110289B2 (en) | 1998-04-08 | 2015-08-18 | Qualcomm Mems Technologies, Inc. | Device for modulating light with multiple electrodes |
| US8928967B2 (en) | 1998-04-08 | 2015-01-06 | Qualcomm Mems Technologies, Inc. | Method and device for modulating light |
| DE19921190A1 (de) * | 1999-05-07 | 2000-11-16 | Forschungszentrum Juelich Gmbh | Verfahren zur Herstellung eines Elements mit porosidiertem Material |
| US9025235B2 (en) | 2002-12-25 | 2015-05-05 | Qualcomm Mems Technologies, Inc. | Optical interference type of color display having optical diffusion layer between substrate and electrode |
| US9019590B2 (en) | 2004-02-03 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Spatial light modulator with integrated optical compensation structure |
| US8094362B2 (en) | 2004-03-06 | 2012-01-10 | Qualcomm Mems Technologies, Inc. | Method and system for color optimization in a display |
| US8861071B2 (en) | 2004-09-27 | 2014-10-14 | Qualcomm Mems Technologies, Inc. | Method and device for compensating for color shift as a function of angle of view |
| US8971675B2 (en) | 2006-01-13 | 2015-03-03 | Qualcomm Mems Technologies, Inc. | Interconnect structure for MEMS device |
| US8872085B2 (en) | 2006-10-06 | 2014-10-28 | Qualcomm Mems Technologies, Inc. | Display device having front illuminator with turning features |
| US9019183B2 (en) | 2006-10-06 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Optical loss structure integrated in an illumination apparatus |
| US9121979B2 (en) | 2009-05-29 | 2015-09-01 | Qualcomm Mems Technologies, Inc. | Illumination devices and methods of fabrication thereof |
| US8979349B2 (en) | 2009-05-29 | 2015-03-17 | Qualcomm Mems Technologies, Inc. | Illumination devices and methods of fabrication thereof |
| US8848294B2 (en) | 2010-05-20 | 2014-09-30 | Qualcomm Mems Technologies, Inc. | Method and structure capable of changing color saturation |
| US8902484B2 (en) | 2010-12-15 | 2014-12-02 | Qualcomm Mems Technologies, Inc. | Holographic brightness enhancement film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000514568A (ja) | 2000-10-31 |
| EP0902909B1 (de) | 2002-10-02 |
| DE59708379D1 (de) | 2002-11-07 |
| EP0902909A1 (de) | 1999-03-24 |
| DE19622748A1 (de) | 1997-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO1997046908A1 (de) | Interferenzfilter auf der basis von porösem silicium | |
| DE69305375T2 (de) | Schaltbarer resonanter Filter für optische Strahlung | |
| DE69607960T2 (de) | Flaches beugungsgitterlichtventil | |
| DE4407067C2 (de) | Dielektrisches Interferenz-Filtersystem, LCD-Anzeige und CCD-Anordnung sowie Verfahren zur Herstellung eines dielektrischen Interferenz-Filtersystems | |
| DE60314706T2 (de) | Drahtgitter-Polarisator | |
| EP0456652B1 (de) | Optische farbteiler-anordnung | |
| EP2766192B1 (de) | Sicherheitselement | |
| DE102004005233B4 (de) | Infrarotstrahlen-Sperrfilter und Methoden zu dessen Herstellung | |
| DE69111906T2 (de) | Verfahren zur Herstellung von Matrixen von MIM-Anordnungen und solche Matrixen enthaltende Anzeigevorrichtungen. | |
| EP0704068B1 (de) | Optisches bauelement | |
| EP0578302B1 (de) | Lichtquelle mit einer lumineszierenden Schicht | |
| DE69220120T2 (de) | Integrierte optische Wellenleitervorrichtungen und Herstellungsverfahren | |
| DE68920976T2 (de) | Flüssigkristall-Vorrichtung als räumlicher Lichtmodulator zur Modulation eines Laserstrahles. | |
| DE19533591A1 (de) | Optisches Beugungselement | |
| DE102008060281B4 (de) | Reflektierender Flächenlichtmodulator | |
| DE19624276C2 (de) | Phasenmodulierende Mikrostrukturen für höchstintegrierte Flächenlichtmodulatoren | |
| DE68927778T2 (de) | Elektronisch variables MUEF-Filter für Abbildungsanordnungen | |
| DE60222213T2 (de) | Abstimmbarer Fabry-Perot-Filter und Methode zu dessen Herstellung und Gebrauch | |
| DE68921576T2 (de) | Projektions-Anzeigevorrichtung unter Verwendung einer Flüssigkristallzelle mit reflektiven Farbfiltern. | |
| DE69131460T2 (de) | Optische ventilvorrichtung | |
| EP0187218A2 (de) | Flüssigkristallmodulator zur Sprach- und Informationsübertragung im sichtbaren und Infrarotbereich | |
| EP0483663A1 (de) | Bandpassfilter für elektromagnetische Strahlung | |
| DE4100831A1 (de) | Breitband-entspiegelungsschichtbelag | |
| EP0030600B1 (de) | Flüssigkristallzelle | |
| WO1997014226A2 (de) | Schaltungsanordnung zur dispersionskompensation in optischen übertragungssystemen mit hilfe von gechirpten bragg-gittern |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN JP KR US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 1997925897 Country of ref document: EP |
|
| WWP | Wipo information: published in national office |
Ref document number: 1997925897 Country of ref document: EP |
|
| WWG | Wipo information: grant in national office |
Ref document number: 1997925897 Country of ref document: EP |