WO2017055149A1 - Dispositif de projection de données - Google Patents

Dispositif de projection de données Download PDF

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Publication number
WO2017055149A1
WO2017055149A1 PCT/EP2016/072369 EP2016072369W WO2017055149A1 WO 2017055149 A1 WO2017055149 A1 WO 2017055149A1 EP 2016072369 W EP2016072369 W EP 2016072369W WO 2017055149 A1 WO2017055149 A1 WO 2017055149A1
Authority
WO
WIPO (PCT)
Prior art keywords
ground glass
holographic
wavelengths
projector
wavelength
Prior art date
Application number
PCT/EP2016/072369
Other languages
German (de)
English (en)
Inventor
Christoph ERLER
Marc Junghans
Alexander Pesch
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 WO2017055149A1 publication Critical patent/WO2017055149A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0112—Head-up displays characterised by optical features comprising device for genereting colour display
    • G02B2027/0116—Head-up displays characterised by optical features comprising device for genereting colour display comprising devices for correcting chromatic aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0252—Diffusing elements; Afocal elements characterised by the diffusing properties using holographic or diffractive means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission

Definitions

  • the present application relates to devices for data projection, in particular for data input, in particular for so-called head-up displays (HUDs).
  • HUDs head-up displays
  • the present application relates to such methods and devices which can be used in vehicles, especially in motor vehicles.
  • Vehicle area e.g. a driver of a vehicle, such as a driver of an automobile, to provide data while driving.
  • This can be done, for example, by appropriate elements, e.g. in the form of a so-called head-up display, in one
  • Windshield of a vehicle whereby the driver does not have to direct his gaze on a display, for example, a combination instrument to obtain data, but can essentially perceive this data, without his eyes to turn away from the road substantially.
  • Such devices are known, for example, in a general manner from DE 10 2008 039 737 A1.
  • a holographic optical element in a windshield for providing reflection to the human eye is proposed, the concepts being explained in particular for oblique windshields of passenger cars.
  • Automotive applications are known, are known from WO 2014/1 15095 A2.
  • a holographic screen is used, and depending on the distance of this screen from a human eye, a special contact lens is needed to easily focus on that screen.
  • a ground glass is used to create a scattering intermediate image. Such a ground glass can be used in transmission or in reflection. The scattering on a microstructure of a conventional
  • Holographic optical elements in a windshield also referred to as holographic head-up displays, mean that they can image the intermediate image generated by the ground glass holographically as a virtual image behind the windshield.
  • Wavelength-selective volume holograms used for this purpose diffract the light of one or more specific discrete wavelengths into a desired solid angle where the observer's eye may be located. This solid angle is also called Eyebox. If the intermediate image generated by a projector is not scattered efficiently enough by the ground glass screen, an unscattered zeroth order remains, which directly corresponds to transmitted light or reflected light from the projector. In conventional designs, this unwanted zeroth order is also accepted by the head-up display and can lead to significant quality degradation of the virtual image as it overlays it.
  • Ground glass according to claim 1 a ground glass according to claim 3, a device with such a ground glass according to claim 8 and a device according to claim 9 solved.
  • the subclaims define further embodiments.
  • a data projection apparatus comprising: a diffusing screen, a projector for projecting data onto the diffusing screen, and at least one further optical component for imaging an intermediate image formed by the diffusing screen toward an observer's eye; wherein the diffusing focusing screen is positioned relative to the projector such that the projector illuminates the diffusing screen obliquely at an angle other than 90 ° so that unscattered light from the screen does not reach the observer's eye.
  • Such an arrangement of a ground glass can suppress a zero-order influence.
  • the ground glass is so inclined to one
  • the diffusing screen may include a roughened glass mat.
  • a ground glass for a data projection apparatus comprising: a holographic structure, wherein the holographic structure is arranged to spread at least two different wavelengths, the holographic structure being further arranged, equal scattering angles for each of the at least two Wavelengths independent of the
  • a holographic focusing screen with holograms for different wavelengths preferably a red, a green and a blue wavelength used.
  • the holograms are coordinated in such a way that scattering angle in the
  • the holographic structure may be arranged to scatter the at least two different wavelengths in a direction which differs from a direction of unscattered light, for example by at least 10 °, at least 20 ° or at least 30 °.
  • a ground glass for a data projection apparatus comprising: a holographic structure, wherein the holographic structure is arranged to diffuse light having at least two different wavelengths, the holographic structure being arranged to diffuse the at least two wavelengths in a direction different from a direction of unscattered light, eg by at least 10 °, at least 20 ° or at least 30 °, so to speak to provide a directional "scattering lobe".
  • the above focusing screens may be for wavelengths outside of the at least two
  • the ground glass can have a respective one for each of the at least two wavelengths
  • holographic layer have.
  • the ground glass can comprise a volume hologram and / or a surface hologram.
  • the at least two wavelengths can have a wavelength in the red region, a
  • a data projection apparatus comprising: a ground glass as described above, a projector for projecting data onto the ground glass, and at least one further optical component for directing an intermediate image generated at the ground glass to an eye of an observer.
  • the projector may be configured to project based on a wavelength in the red region, a wavelength in the green region, and a wavelength in the blue region (RGB projector).
  • the at least one further optical component may comprise a holographic element, wherein the holographic element is arranged to generate a virtual image for viewing by the eye.
  • the at least one further optical component may comprise a component arranged in a window of a vehicle.
  • the device can be designed as a head-up display or as an image projector.
  • FIG. 1 is a schematic representation of a device for data projection, in particular data reflection, according to an embodiment
  • FIG. 3 shows a device for data reflection according to a further exemplary embodiment
  • FIG. 4 shows a device for data reflection according to a further exemplary embodiment
  • FIG. 3 shows a device for data reflection according to a further exemplary embodiment
  • FIG. 4 shows a device for data reflection according to a further exemplary embodiment
  • FIG. 3 shows a device for data reflection according to a further exemplary embodiment
  • FIG. 4 shows a device for data reflection according to a further exemplary embodiment
  • Fig. 5 is an illustration for illustrating the manufacture of a holographic focusing screen for use in embodiments.
  • FIG. 1 shows a schematic representation of a device for data projection, for example for data reflection in a vehicle.
  • the device of FIG. 1 comprises a projector 10, which projects data to be displayed on a ground glass pane 1 1 for generating an intermediate image.
  • the projector 10 may be in particular a projector, which for generating color images two or more different
  • Wavelengths in particular three wavelengths, connects.
  • the three wavelengths preferably comprise a red, a green and a blue wavelength (RGB projection).
  • the ground glass 1 1 can be scanned with three lasers of appropriate colors.
  • the intermediate image is then imaged by the ground glass 1 1 via further components 12 to one or both eyes 13 of a user.
  • the elements 12 may comprise, for example, imaging optical components such as lenses or holographic elements.
  • the elements 12 include a head-up display, which may be formed by, for example, a holographic element provided in or on a windshield of a vehicle.
  • the ground glass 1 1 is illuminated by the projector 10 at an angle (different from the illustrated vertical illumination), so that a zeroth order (substantially unscattered light) from the ground glass 1 1 does not or not significantly to the eye 13 passes ,
  • the ground glass pane 1 1 is a holographic ground glass, which holograms, such as volume holograms or
  • holographic focusing screen which is a
  • Fig. 2 shows a head-up display according to an embodiment, which is an example of the above-mentioned first aspect.
  • a projector 20 is provided which may be configured as illustrated for the projector 10 of FIG. 1, for example emitting red, green and blue light, or may project desired data in some other manner, for example by techniques conventionally known for projectors, such as by means of a micromirror arrangement (DMD, Digital
  • the projector 20 projects an image on a ground glass 21, which in the case of Figure 2 is a conventional screen, for example
  • the ground glass 21 is inclined to an axis which is defined by the projector 20, or, in other words, the projector 20 illuminates the ground glass 21 at an angle 22 (in Fig. 2, as usual in optics, drawn to the vertical ).
  • the intermediate image corresponding to the light scattered by the ground glass 21 reaches a windshield 24, which is at least in one
  • Partial area for example, in a region 25, a deflection optics integrated as a head-up display.
  • an optic may be arranged in the region 25, as described, for example, in the cited prior art or - as a holographic element - in German Patent Application 10 2015 101 687.7.
  • the optical element 25 images the image projected onto the ground glass 21 onto a virtual image 26 which can be viewed by a viewer (represented by an eye 27) within an eyebox.
  • an imaging hologram can be arranged in the region 25.
  • Such a hologram in area 25 may also have corresponding holograms or holographic functions for different wavelengths used, for example red, green and blue.
  • a device such as that shown in FIG. 2 can be used for example as a head-up display for a motor vehicle with the windshield 24.
  • a zeroth order ie, a beam passing through the ground glass 21, denoted by 23 in FIG. 2, does not enter the area 25, and thus is ultimately not detected by the eye 27.
  • the unscattered zeroth order can be suppressed or at least reduced.
  • a disadvantage of the device of FIG. 2 is that only a relatively small fraction of the
  • Light intensity for the head-up display can be used.
  • FIG. 3 shows a head-up display according to an exemplary embodiment, in which a holographic ground glass 30 is used.
  • the holographic focusing screen 30 is illuminated by a projector 20 in reflection, wherein the backscattered light from the ground glass 30 is in turn directed into a region 25 with a corresponding deflection optics, such as a holographic element on a windshield.
  • a corresponding deflection optics such as a holographic element on a windshield.
  • the embodiment of FIG. 3 corresponds to the embodiment of FIG. 2.
  • the projector 20 may scan the ground glass 30 with a variety of different colors, such as red, green, and blue laser beams.
  • the holographic focusing screen can then have surface and / or volume holograms for the corresponding colors.
  • three discrete holographic scattering functions for the three different colors can be realized.
  • These three discrete holographic scattering functions can be realized in one layer, but also in three separate layers. For such layers, for example, a
  • volume holographic layer can be used.
  • a scattering direction (scattering lobe) of the ground glass 30 may be set so that most of the light is scattered toward the area 25.
  • the geometric arrangement may be selected such that a theoretically occurring zeroth order does not reach the region 25.
  • this may be the
  • Diffraction direction of the focusing screen 30 by at least 10 °, preferably by at least 20 ° or at least 30 °, different from a direction of zero order.
  • the preparation of the described holographic focusing screen can be carried out by analogous means, i. by a holographic exposure of a photosensitive material (production of a master) or by optical replication of such a master.
  • holographic focusing screen in transmission (e.g., 40 in Fig. 4) with a desired one
  • Preferred direction of the scattering lobe can be such. in Fig. 5 described manufacture.
  • a holographic layer (photosensitive material) 50 falls a spherical wave 52 of a coherent laser at 51.
  • this layer 50 is hit by a diffuse scattered wave 53 with a specific preferred direction, by means of which the desired preferred direction of the scattering lobe can be determined.
  • Such exposure of the layer 50 may be done separately for any desired wavelength.
  • the scattered wave 53 can be scattered on a conventional ground glass (or any scattering body) or by means of an optoelectronic device Leos, DMD, phase modulator or the like. produce.
  • the preparation of the holographic ground glass in reflection (e.g., 30 in Fig. 3) may accordingly - except that in this case the two shafts 52, 53 fall from different sides onto the holographic layer 50.
  • FIG. 4 shows a modification of the exemplary embodiment of FIG. 3 with a holographic ground glass 40 which is operated in transmission. Apart from this
  • the ground glass 40 may be configured in terms of their properties with respect to color fringes and / or direction of a scattering lobe as explained above for the ground glass 30.
  • the angle arrangements shown in Figs. 2 to 4 are only the
  • the angles shown be different, and / or the arrangement can also be realized mirrored represented on a horizontal line.
  • Projection systems with scattering matt glass-produced intermediate images applicable, for example, Despeckgru with lenses, such as rotating or otherwise moving lenses, or projection screens, for example, for cinema applications.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instrument Panels (AREA)
  • Holo Graphy (AREA)

Abstract

La présente invention concerne des dispositifs et des procédés de projection de données, permettant d'éviter les franges de couleurs, par exemple par utilisation d'un verre dépoli holographique, et/ou permettant d'éviter les altérations de l'image grâce à un ordre zéro de la diffusion, par exemple par un agencement incliné du verre dépoli ou par l'utilisation d'un verre dépoli holographique.
PCT/EP2016/072369 2015-09-28 2016-09-21 Dispositif de projection de données WO2017055149A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015116408.6A DE102015116408A1 (de) 2015-09-28 2015-09-28 Vorrichtung zur Datenprojektion
DE102015116408.6 2015-09-28

Publications (1)

Publication Number Publication Date
WO2017055149A1 true WO2017055149A1 (fr) 2017-04-06

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PCT/EP2016/072369 WO2017055149A1 (fr) 2015-09-28 2016-09-21 Dispositif de projection de données

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DE (1) DE102015116408A1 (fr)
WO (1) WO2017055149A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019131732A1 (de) * 2019-11-25 2021-05-27 Bayerische Motoren Werke Aktiengesellschaft Projektionseinheit für eine Blickfeldanzeigevorrichtung zum Einsatz in einem Fahrzeug

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016113518A1 (de) 2016-07-21 2018-01-25 Carl Zeiss Jena Gmbh Vorrichtungen zur Dateneinspiegelung
DE102017217193B4 (de) 2017-09-27 2019-07-25 Audi Ag Anzeigevorrichtung, insbesondere für ein Fahrzeug, sowie Fahrzeug mit einer solchen Anzeigevorrichtung

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Publication number Priority date Publication date Assignee Title
DE19927712A1 (de) * 1998-12-02 2000-06-08 Hsm Gmbh Holografisches Display-System zur Darstellung von Information
DE19930710A1 (de) * 1999-07-02 2001-01-11 Daimler Chrysler Ag Bilddarstellungssystem und -verfahren für Fahrzeuge
DE102012219723A1 (de) * 2012-10-29 2014-04-30 Robert Bosch Gmbh Blickfeldanzeigegerät und Verfahren zum Projizieren einer Information für einen Fahrer eines Fahrzeugs
WO2014193480A1 (fr) * 2013-05-28 2014-12-04 Fusao Ishii Écran de projection à contraste élevé
WO2016124713A2 (fr) * 2015-02-05 2016-08-11 Carl Zeiss Jena Gmbh Procédé et dispositifs pour l'incrustation de données

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DE8026773U1 (de) 1981-03-19 Hopke, Bernd, Dipl.-Ing., 8961 Durach Durchlichtprojektionsbildwand
US5037166A (en) 1985-10-07 1991-08-06 Astronautics Corporation Of America Holographic optical element for instrument panel displays
EP1006375A1 (fr) 1998-12-02 2000-06-07 HSM Holographic Systems München GmbH Système holographique d'affichage d'information comportant un écran holographique d'image intermédiaire et méthode de production dudit écran holographique
DE10344684A1 (de) 2003-09-25 2005-05-25 Siemens Ag Head-Up-Display, insbesondere zum Einsatz in Kraftfahrzeugen
DE102008039737A1 (de) 2008-08-26 2010-04-01 G + B Pronova Gmbh Anzeigeeinrichtung, transparentes Abbildungselement sowie Verfahren zur Herstellung eines transparenten Abbildungselements
US20150362734A1 (en) 2013-01-28 2015-12-17 Ecole Polytechnique Federale De Lausanne (Epfl) Transflective holographic film for head worn display

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19927712A1 (de) * 1998-12-02 2000-06-08 Hsm Gmbh Holografisches Display-System zur Darstellung von Information
DE19930710A1 (de) * 1999-07-02 2001-01-11 Daimler Chrysler Ag Bilddarstellungssystem und -verfahren für Fahrzeuge
DE102012219723A1 (de) * 2012-10-29 2014-04-30 Robert Bosch Gmbh Blickfeldanzeigegerät und Verfahren zum Projizieren einer Information für einen Fahrer eines Fahrzeugs
WO2014193480A1 (fr) * 2013-05-28 2014-12-04 Fusao Ishii Écran de projection à contraste élevé
WO2016124713A2 (fr) * 2015-02-05 2016-08-11 Carl Zeiss Jena Gmbh Procédé et dispositifs pour l'incrustation de données

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019131732A1 (de) * 2019-11-25 2021-05-27 Bayerische Motoren Werke Aktiengesellschaft Projektionseinheit für eine Blickfeldanzeigevorrichtung zum Einsatz in einem Fahrzeug

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