EP1145069A2 - Ensemble dans lequel de la lumiere provenant d'une source lumineuse est dirigee sur une surface - Google Patents

Ensemble dans lequel de la lumiere provenant d'une source lumineuse est dirigee sur une surface

Info

Publication number
EP1145069A2
EP1145069A2 EP00967830A EP00967830A EP1145069A2 EP 1145069 A2 EP1145069 A2 EP 1145069A2 EP 00967830 A EP00967830 A EP 00967830A EP 00967830 A EP00967830 A EP 00967830A EP 1145069 A2 EP1145069 A2 EP 1145069A2
Authority
EP
European Patent Office
Prior art keywords
optics
light
optical axis
optical
partial
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.)
Withdrawn
Application number
EP00967830A
Other languages
German (de)
English (en)
Inventor
Christfried Symanowski
Gudrun SCHRÖTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jenoptik AG
Original Assignee
Carl Zeiss Jena GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Zeiss Jena GmbH filed Critical Carl Zeiss Jena GmbH
Publication of EP1145069A2 publication Critical patent/EP1145069A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0875—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements
    • G02B26/0883—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements the refracting element being a prism

Definitions

  • the invention relates to an arrangement in which light from a light source is directed by means of illumination optics onto a surface on which an image can be set that can be detected by means of projection optics.
  • Such arrangements are, for example, slide or film projectors, in which one of one
  • Light source originating light bundle is thrown onto a slide or film image with the aid of a condenser for uniform illumination, which is then subsequently displayed on a screen with a lens as projection optics.
  • Tilting mirror matrices video images are generated. These tilting mirror matrices consist of a field of individual tilting mirrors, which can assume two states, zero and one, depending on the direction of reflection set. The number of rows and columns of the field correspond to the video standard for lines and pixels per line of the video image to be displayed. In order to enable gray values or colors of individual pixels, the tilting mirrors assigned to them are subjected to a pulse train depending on the pixel information, which quickly switches these tilting mirrors back and forth between reflection in one of the two directions and reflection in the other direction, so that on average a corresponding intermediate value between light and dark is set by the pulse duty factor between the states zero and one. Such tilting mirror matrices are, for example, from the Texas company
  • the optics used when using such a tilting mirror matrix consist of an illumination optics of the tilting mirror matrix and a projection optics, which is usually referred to as an objective, for projecting the
  • Image content on a screen whereby both front and rear projections are possible.
  • the concept of the screen is to be understood very broadly here. Especially for show applications, the steam from a fog machine or a water wall is also understood here as a screen, for example.
  • Projection optics previously used optics with a long focal length, so that a certain size was always required for these projectors with tilting mirrors. Because of the long light paths, light losses are also possible, on the basis of which the input power requirement and thus also the heat output to be dissipated is increased, which in turn also necessitates an enlarged design. With smaller projectors and thus the desired reduced heat output, an image of a large screen diagonal is therefore no longer possible.
  • Small and bright projectors are of great interest. They should be transportable and should produce a sufficiently bright picture of a suitable size under normal room lighting. It is already being attempted to replace the portable projectors that are just coming onto the market with a next, significantly smaller generation of projectors, so-called palm-top projectors. For these projectors, much smaller optical systems are required both for the lighting optics and for the projection lens. One could try to achieve this by miniaturizing the known optics, but the size of the lamp, the heat problem and the additional cooling effort that would result would always determine a lower limit. In addition, the tilting mirror matrices must always have a certain size in order to be able to reflect enough light.
  • the object of the invention is to find a new arrangement for lighting and for projection, which allows such miniaturized projectors to be realized.
  • the lighting optics have an optics device connected downstream of the light source and a prism arranged between the surface and the optics device, by means of which the optics device incoming light is deflected without reflection. This allows the first optics, the lighting optics, to be close to the other optical elements of the
  • Projection optics are located and, in extreme cases, are arranged parallel to the optical axis of the second optics.
  • the compactness of a projection device can be increased extraordinarily, as will be explained in more detail later with the aid of exemplary embodiments becomes. It is essential that the light incident on the prism is deflected only by refraction.
  • Part optics each have a common optical axis.
  • the first optical system contains the optical device and the second partial optical system, so that the second partial optical system is both part of the first partial optical system and the second partial optical system.
  • the light for the illumination comes from the optics device (third partial optics).
  • the light coming from the third partial optics and incident in the second partial optics encloses an angle to the common optical axis, the third partial optics lying outside a range which is from the light reflected from the surface from the second to the first Partial optics is run through.
  • Apertures can be chosen suitably large enough and a sufficiently large path for the third partial optics is kept clear so that the light emerging from the tilting mirror matrix is let through unhindered.
  • the special design of such optics is known to the person skilled in the art.
  • Optics due to the smaller focal lengths for lighting and for collecting the light originating from the tilting mirror matrix and then to be projected can accordingly be kept much smaller than in the prior art, so that less light losses occur.
  • a prism can also be designed in such a way that light beams of different colors are separated, which are then directed to different tilting mirror matrices after this splitting, on which different color separations are then set to display color images. Compared to other solutions, for example with a color wheel, this results in an overall higher light output with regard to the electrical power fed in.
  • the third partial optics can be designed, for example, in such a way that a light source focused on one point is imaged again by this partial optics on the point of the tilting mirror matrix mentioned by way of example.
  • the uniformity of the image it has been shown to be considerably less complex if the third partial optics is designed to focus, that is, to convert a parallel beam into a point.
  • a parallel beam can then be assumed on the input side of the second partial optics, which beam is then focused on the tilting mirror matrix for imaging.
  • more space is generally required for the third partial optics in order to generate the parallel light beam, but the uniformity of the lighting is significantly increased.
  • a larger space requirement is at
  • an essential advantage of the invention is the special possibility of optimizing apertures both for imaging and for lighting.
  • the following developments of the invention have proven to be particularly advantageous, in which the second partial optics on the light source side have an aperture of greater than 0.3 and in particular 0.5 and the third partial optics for an illumination angle ⁇ on the reflective surface behind the second partial optics is designed with sin ⁇ less than 0.3 and in particular less than 0.2.
  • the aperture With increasing the aperture, a smaller distance between the tilting mirror matrix (reflecting surface) mentioned by way of example and the first or second optics is possible than is known from the prior art. Because of this favorable aperture for illumination, it is easily ensured that the light emanating from the tilting mirror matrix can be projected onto the screen unhindered by the illumination optics.
  • the reflecting surface is a rectangular image-forming element, in particular a tilting mirror matrix or a reflecting LCD, and the light bundle incident in the third partial optics has a rectangular beam profile which is matched to this aspect ratio.
  • the advantage of using the arrangement according to the invention in a tilting mirror matrix has already been made clear above.
  • the fact that the light beam has a rectangular beam profile adapted to its aspect ratio makes it possible for the light used for the illumination to be brought almost completely onto the tilting mirror matrix, as a result of which a maximum luminosity is then generated on the image.
  • a mixing rod for generating the rectangular beam profile is provided in front of the third partial optic according to an advantageous development of the invention.
  • a mixing rod mixes the light coming from a light source using multiple reflections. You can do this, for example, a rectangular rod with a rectangular shape
  • this mixing rod could also be arranged in front of or behind the third partial optics. To promote compactness, it has proven to be extremely favorable if the mixing rod is provided between the lighting device and the third partial optics.
  • a color wheel is usually provided for displaying color images.
  • a color wheel known in this regard from the prior art is a circular disk which has a plurality of sectors with different color filters on its circumference. This color wheel is quickly rotated to produce a color image, whereby the light is sequentially filtered for different colors.
  • the information content on the tilting mirror matrix is also synchronized with the respective colors of the individual color filters through which the light for illuminating the matrix passes. Due to the sluggishness of the eye and the adjusted rotation speed of the color wheel the different colors are perceived at the same time and the different color separations set sequentially on the tilting mirror matrix are recorded as a single colored video image.
  • Such optics according to the prior art usually require an increased effort for adjustment in order to match the corresponding axes to one another.
  • the tilting mirror matrix can be adjusted in position and / or angular position as an element for an adjustment.
  • a correction option for angle and distance is sufficient to correct both the
  • Illumination direction and the light passage through the first and second partial optics optimally set.
  • the optics device has a first optical axis and the second optics has a second optical axis
  • the optics device can be arranged laterally next to and above the second optics, so that a very compact arrangement is obtained. Furthermore, the arrangement of the prism allows the two optical axes to be skewed with respect to one another, so that there is great freedom of design.
  • the arrangement according to the invention can advantageously be developed in that the optical axis of the optical device runs parallel to the optical axis of the second optical system.
  • the optical device can be arranged directly above the second optical system, as a result of which the arrangement according to the invention is designed to be very slim.
  • 1 shows a schematic illustration of the position of the illumination optics and projection optics in a reflected light projection device
  • 2 shows a schematic representation of the position of the illumination optics and projection optics with a wedge-shaped prism
  • 3 shows a schematic illustration to explain the structure of the illumination optics and projection optics from three partial optics
  • Fig. 4 shows a detailed embodiment with three partial optics and a wedge-shaped prism.
  • FIGS. 1 and 2. 1 shows an optical system 2 for illuminating the image set on a reflecting surface 25.
  • this surface 25 is realized by a tilting mirror matrix.
  • a light bundle 6 falls onto a mirror 8, which can generally be a reflecting surface of a prism, from which it is thrown at a suitable angle onto the matrix lying in the surface 25.
  • FIG. 1 a prism 10 for deflecting is provided in FIG. 2. Furthermore, the illumination optics 12 lie above the projection optics 4. The prism
  • the light beam 6 is deflected by means of the prism only by refraction and without reflection.
  • FIG. 2 A more compact design can be clearly seen in the comparison of FIG. 2 with FIG. 1.
  • a further increased compactness compared to conventional lighting optics and projection optics can be achieved by using three partial optics, two of which serve as lighting optics and two as projection optics, one of the partial optics in the vicinity of the reflecting surface 25 being common to both optics.
  • a first partial optic 22 and a second partial optic 24 are arranged on an optical axis 20, which together form a projection optic with which an image displayed on a reflecting surface 25 is displayed on a projection screen.
  • the reflecting surface 25 is formed by a digital tilting mirror matrix (DMD matrix), as was already described at the beginning. If, instead of a single DMD matrix, three are to be used for the different color separations, a prism 26 can optionally be used, with which the illuminating light is split into light bundles of three different colors, which are then directed onto three different DMD matrices arranged at an angle become.
  • DMD matrix digital tilting mirror matrix
  • the second partial optics 24 instead of directing a separate lighting optic, as is known from the prior art, for illumination onto the reflecting surface 25, it is proposed that the second partial optics 24 also be used for lighting at the same time, and the light provided for this purpose via a third partial optics 28 and one To direct the device for deflection into the second partial optics 24. 3, a prism 10 is shown as a device for deflecting.
  • the second partial optics 24 are also used as partial optics 24 for projecting. Therefore, the reflecting surface 25 can be brought much closer to the second partial optics 24. The focusability is improved so that more light is available for projection than is known from the prior art.
  • the favorable aperture values for the light for illumination and the light collected for projecting which are also made possible as a result, also allow the reflecting surface 25 to be guided closer to the second partial optics.
  • the apertures of the entire optics are designed so that the light to be projected passes through the optics 24 and 26 outside a region in which the illuminating light is directed onto the reflecting surface 25.
  • the second partial optics 24 is a focusing optics that converts the light reflected by the reflecting surface 25 into the pupil plane 32 of the second optics, which is also the pupil plane of the second optics from which then projects the first partial optics 22 onto the projection wall.
  • the light emanating from the third partial optics 28 is also projected onto the pupil surface 32.
  • the prism 10 as shown in FIG. 3, lies in the vicinity of the pupil surface 32.
  • the DMD matrix 34 can be adjusted in terms of angle and position in order to be able to adjust it optically.
  • the partial optics 22, 24 and 28 are also shown in more detail in FIG. 4 as lens groups.
  • a special color wheel 40 is shown in FIG. In contrast to the prior art, this color wheel is not a disk, but it is designed as a lateral surface of a cylinder, the cylinder length of which only has to be approximately the size of the light beam in front of the third partial optics 28. This saves space compared to the known color disc.
  • This lateral surface is provided with different color filters, which in the exemplary embodiment were formed with the aid of dielectric layers.
  • This color wheel is rotated faster than its rotation axis 42 at 1/10 revolutions per second, so that an observer apparently simultaneously perceives the colors caused by the color filters provided on the lateral surface due to the inertia of the eye.
  • the image content on the DMD matrix 34 is set synchronously with these colors. The eye of an observer thus experiences a color image projected via the partial optics 22.
  • a mixing rod 46 is also provided. This is designed as a glass rod, on the jacket of which total reflection takes place. Due to the multiple total reflection on the sides, the information of the origin of the light emission is lost, so that a uniformly illuminated rectangular field results at the end of the mixing rod 46.
  • This uniformly illuminated rectangular field is directed onto the DMD matrix via the third partial optics 28 and the second partial optics 24.
  • a rectangular mixing rod 46 is advantageous, whose aspect ratio of the exit surface is adapted to the dimensions of the DMD matrix 34 in order to lose as little primary light from the lamp 44 as possible for its illumination.
  • this exemplary embodiment for imaging DMD matrices has proven to be particularly advantageous for the display of video images with screen diagonals larger than 2 m.
  • the optical elements are extremely compact. Since the electronics can also be kept small by means of miniaturization, this creates a device that can be conveniently carried in a briefcase. Such a thing The device is therefore particularly suitable for video demonstrations at trade fairs, but also for small artists and sales representatives who want to present a video presentation to a larger or smaller audience.
  • the position of the third partial optics 28 and thus also the position of the lamp 44 can be selected independently of the second optics 22, 24.
  • the lamp can be arranged above and next to the end of the first partial optics 22 facing away from the surface 25.
  • the third partial optics 28 are then arranged such that their optical axis 29, seen both in plan view and in side view, with the optical axis 20 of the first and second partial optics 22,
  • the prism 10 is arranged between the third and second partial optics 28, 24 such that the entrance surface of the third partial optics 28 Prisms with the optical axis 29 of the third partial optics 28 each include an angle that is not equal to 90 °, both in plan view and in side view. In this way, the incident light is deflected in two spatial directions.
  • the angle between the two optical axes 29 and 20 in the top view is preferably 0 ° to 40 ° and the angle in the side view is 15 °, for example.
  • the exit surface of the prism 10 facing the surface 25 can also include an angle with the optical axis 29, both in plan view and in side view, that is not equal to 90 °.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un ensemble dans lequel de la lumière provenant d'une source lumineuse (44) est dirigée, par l'intermédiaire d'une optique d'éclairage (12), sur une surface (25) sur laquelle on peut régler une image détectable par une optique de projection (4). L'ensemble selon l'invention est caractérisé en ce que l'optique d'éclairage (12) comprend un dispositif optique (28) placé en aval de la source lumineuse (44), ainsi qu'un prisme (10) placé entre la surface (25) et le dispositif optique (28) et déviant sans réflexion la lumière venant du dispositif optique (28).
EP00967830A 1999-10-08 2000-09-29 Ensemble dans lequel de la lumiere provenant d'une source lumineuse est dirigee sur une surface Withdrawn EP1145069A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19948542 1999-10-08
DE19948542A DE19948542A1 (de) 1999-10-08 1999-10-08 Anordnung, bei der von einer Lichtquelle aus Licht auf eine Fläche gerichtet wird
PCT/EP2000/009561 WO2001027683A2 (fr) 1999-10-08 2000-09-29 Ensemble dans lequel de la lumiere provenant d'une source lumineuse est dirigee sur une surface

Publications (1)

Publication Number Publication Date
EP1145069A2 true EP1145069A2 (fr) 2001-10-17

Family

ID=7924971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00967830A Withdrawn EP1145069A2 (fr) 1999-10-08 2000-09-29 Ensemble dans lequel de la lumiere provenant d'une source lumineuse est dirigee sur une surface

Country Status (4)

Country Link
US (1) US6784946B1 (fr)
EP (1) EP1145069A2 (fr)
DE (1) DE19948542A1 (fr)
WO (1) WO2001027683A2 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7333083B1 (en) * 2001-05-10 2008-02-19 Logitech Europe S.A. Optical based performance improvement for an optical illumination configuration
DE10325867B4 (de) * 2003-06-06 2013-08-01 Eberhard Piehler Projektionsvorrichtung
DE10361559A1 (de) * 2003-12-19 2005-07-14 Carl Zeiss Jena Gmbh Projektionsanordnung
EP1619578B1 (fr) * 2004-07-22 2016-04-06 STMicroelectronics (Research & Development) Limited Dispositif optique et souris optique le comprenant
US7586114B2 (en) 2004-09-28 2009-09-08 Honeywell International Inc. Optical cavity system having an orthogonal input
KR100664325B1 (ko) * 2005-02-04 2007-01-04 삼성전자주식회사 광 터널 및 이를 포함하는 프로젝션 장치
TWI305107B (en) * 2005-09-29 2009-01-01 Young Optics Inc Optical projection apparatus
DE102006008589A1 (de) * 2006-02-24 2007-09-06 Carl Zeiss Jena Gmbh Anordnung zur Bilddarstellung in einem Rückprojektions-Fernsehgerät
TW200900840A (en) * 2007-06-20 2009-01-01 Young Optics Inc Projection apparatus
DE102008045075B4 (de) * 2008-08-29 2019-10-31 Carl Zeiss Ag Bildwiedergabevorrichtung und Bildwiedergabeverfahren
US7864326B2 (en) 2008-10-30 2011-01-04 Honeywell International Inc. Compact gas sensor using high reflectance terahertz mirror and related system and method
US8198590B2 (en) * 2008-10-30 2012-06-12 Honeywell International Inc. High reflectance terahertz mirror and related method
US8269972B2 (en) 2010-06-29 2012-09-18 Honeywell International Inc. Beam intensity detection in a cavity ring down sensor
US8437000B2 (en) 2010-06-29 2013-05-07 Honeywell International Inc. Multiple wavelength cavity ring down gas sensor
US8322191B2 (en) 2010-06-30 2012-12-04 Honeywell International Inc. Enhanced cavity for a photoacoustic gas sensor
TWI427323B (zh) 2011-02-18 2014-02-21 Young Optics Inc 投影鏡頭與投影裝置
KR20150114763A (ko) * 2014-04-02 2015-10-13 삼성전자주식회사 프로젝터
JP6369164B2 (ja) * 2014-06-26 2018-08-08 セイコーエプソン株式会社 光源装置、光源装置の製造方法およびプロジェクター

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2084923A1 (fr) 1991-12-20 1993-06-21 Ronald E. Stafford Spectrometre a modulateur de lumiere spatial
US6252638B1 (en) * 1995-05-23 2001-06-26 Colorlink, Inc. Color controllable illumination device, indicator lights, transmissive windows and color filters employing retarder stacks
JPH11505334A (ja) 1995-05-11 1999-05-18 ディジタル プロジェクション リミテッド 投影装置
US5633691A (en) * 1995-06-07 1997-05-27 Nview Corporation Stylus position sensing and digital camera with a digital micromirror device
JP3517044B2 (ja) * 1995-09-28 2004-04-05 富士写真光機株式会社 ビデオプロジェクタ用光学系
JP4122594B2 (ja) * 1998-10-21 2008-07-23 三菱電機株式会社 光学装置、並びに、それを用いたプロジェクタ装置、リアプロジェクタ装置及びマルチプロジェクタ装置
US6525814B1 (en) * 1998-10-23 2003-02-25 Mission Research Corporation Apparatus and method for producing a spectrally variable radiation source and systems including same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0127683A3 *

Also Published As

Publication number Publication date
US6784946B1 (en) 2004-08-31
DE19948542A1 (de) 2001-05-23
WO2001027683A3 (fr) 2001-09-07
WO2001027683A2 (fr) 2001-04-19

Similar Documents

Publication Publication Date Title
DE69433600T2 (de) Projektionsanzeigevorrichtung
DE19832317C1 (de) Anordnung, bei der von einer Lichtquelle aus Licht auf eine Fläche gerichtet wird
DE4324848C1 (de) Videoprojektionssystem
DE69730282T2 (de) Projektionsgerät mit Mitteln zur Farbtrennung/-synthese
DE60209073T2 (de) Bildprojektionsanzeigevorrichtung mit einem innen reflektierenden Abtastpolygonspiegel
EP1145069A2 (fr) Ensemble dans lequel de la lumiere provenant d'une source lumineuse est dirigee sur une surface
DE69922906T2 (de) Beleuchtungseinrichtung und Projektions-Anzeigegerät
EP2294483B1 (fr) Système de projection
WO1995003676A1 (fr) Systeme de projection d'images video en couleurs et elements optiques de transformation correspondants
DE102004001800B4 (de) Optisches Beleuchtungssystem und Anzeigevorrichtung vom Projektionstyp
DE10251696B4 (de) Optische Kupplungseinrichtung verwendende optische Einrichtung
EP0907902B1 (fr) Procede de representation visuelle tridimensionnelle sur une surface de projection a grand ecran a l'aide d'un projecteur a laser
DE102005058586A1 (de) Wiedergabevorrichtung zur autostereoskopen Wiedergabe von dreidimensionalen Darstellungen
DE10341364A1 (de) Projektoroptiksystem und eine ein solches verwendende Projektorvorrichtung
DE69630731T2 (de) Beleuchtungseinrichtung mit veränderter Polarisationsrichtung und zugehörige Projektionsbildanzeigevorrichtung
DE19651516A1 (de) Flüssigkristall-Projektor mit einer monochromatischen Flüssigkristall-Sichtanzeige
WO2004039084A1 (fr) Ensemble pour projeter une image sur une surface de projection et optique de transformation associee
DE4219851A1 (de) Stereokamera
DE60024006T2 (de) Projektionsanzeigegerät
DE60006931T2 (de) Bildprojektionssystem
DE102008029789B4 (de) Projektionssystem
DE102008029788B4 (de) Projektionssystem
DE69923393T2 (de) Dünne Beleuchtungsvorrichtung für reflektierenden Anzeigevorrichtungen
DE10140806A1 (de) 1:1-Abbildungsoptik sowie Verwendung einer solchen bei einer Projektionsanordnung und einer Aufnahmeanordnung
DE102008029785B4 (de) Projektionssystem

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010427

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

XX Miscellaneous (additional remarks)

Free format text: DERZEIT SIND DIE WIPO-PUBLIKATIONSDATEN A3 NICHT VERFUEGBAR.

PUAK Availability of information related to the publication of the international search report

Free format text: ORIGINAL CODE: 0009015

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17Q First examination report despatched

Effective date: 20020225

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040228