EP0704085A1 - Process and device for producing two- or three-dimensional images in gaseous media - Google Patents
Process and device for producing two- or three-dimensional images in gaseous mediaInfo
- Publication number
- EP0704085A1 EP0704085A1 EP94920440A EP94920440A EP0704085A1 EP 0704085 A1 EP0704085 A1 EP 0704085A1 EP 94920440 A EP94920440 A EP 94920440A EP 94920440 A EP94920440 A EP 94920440A EP 0704085 A1 EP0704085 A1 EP 0704085A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser
- image
- light
- laser beams
- focusing
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/16—Advertising or display means not otherwise provided for using special optical effects involving the use of mirrors
Definitions
- the invention relates to a method and a device for generating two- or three-dimensional images in gaseous media, in particular in the earth's atmosphere.
- Fig. 1 shows the schematic structure of a device according to the invention with two laser beam deflection systems
- Fig. 2 shows the entire arrangement in a block diagram
- the invention is based on the fact that nitrogen and oxygen molecules can be ionized in very large electrical fields (field ionization), and that when an electron is recombined or recaptured, energy is released which is then visible to the molecule in question as light radiation (flash of light) Spectral range is given. If such lighting phenomena are caused at given points, for example a two-dimensional or three-dimensional matrix, a two- or three-dimensional image can be produced. A point of light that is repeated at approx. 25 Hz appears to the viewer as standing. The human eye has a resolution of about 1 minute of arc. At a distance of 100 m from the image to be generated, a line can therefore be drawn if the light points generated are approximately 3 cm apart.
- the light spots are generated by bundling one or more laser beams, which preferably emit outside or at the edge of the visible spectral range, at the intended location where the light spot is to appear.
- the corresponding device is shown in FIG. 1.
- Laser beams or beam pulses are generated by one or more lasers (1)
- the laser beam falls onto a focusing mirror (4), which focuses the received laser light and focuses it at a distance of 10-100 in a narrow area, in which the field strength then becomes so high that the atmospheric gases contained therein , mainly nitrogen and oxygen, are ionized. Because of the high probability of recombination, the ionization is immediately followed by the laser pulse.
- a C0 2 laser or a YAG laser is used. Such a laser emits in the infrared spectral range, so that the observers cannot see the laser beam, but only the effect caused by it, ie the light flash (9) or the image composed of such light flashes (9).
- the expansion mirror (3) shown in Fig. 1 can also be used for beam deflection, so that - analogous to the deflection of an electron beam in a black and white television picture - the focus of the
- Laser beam pulses scans a given point matrix and generates light flashes (9) at those matrix points that are to appear bright in the image.
- the focusing mirrors have a diameter of 30 to 50 cm, for example.
- Both mirrors preferably the entire beam deflection system
- Tons are used.
- the two laser beams shown in FIG. 1 do not necessarily have to be in phase at the focusing point his. The only thing that matters is that enough molecules of the atmospheric air are ionized. However, if phase correctness is achieved, an increase in the field strength at the focal point is to be expected, so that the luminous efficiency increases.
- the optical device (3) with which the laser beam is deflected so that its focal point scans the rows and columns of the intended image, can be equipped with piezo elements. These piezo elements move the deflection mirror and thus achieve beam deflection. So-called scanners are also possible, e.g. rotating mirrors with electrical coil arrangements, as well as so-called Bragg reflectors.
- the spatial depth, i.e. the third dimension can be achieved by changing the focal length of the optical device (zoom).
- the laser beam is sent to individual parallel amplifiers in each case after preamplification via a mirror system.
- the 10 individual laser beams are directed onto the common focus lens via separate deflection systems and focused at the intended pixels, for example, at a distance of about 100 m from the focus lenses. Since the repetition frequency of the laser pulses can be 5 kHz, 50,000 light points per second can be generated with this system. This is sufficient, for example, to produce a neon sign floating in free space.
- the components of the deflection device are shown schematically in FIG.
- the entire control is synchronized to the laser beam source (1).
- electrical signals are derived from the laser pulses with a trigger pulse generator (8), which signals are used in the computer control (6) for triggering the deflection device.
- the position data available in a storage unit are called up in the computer control (6) and processed into signals which are fed to the optical device (3), which then independently sets the positioning units for the deflection mirrors.
- the next position data is provided by the storage unit during the setting time.
- the setting of the positioning units (7) is completed and the next light pulse is emitted by the synchronization source, which now generates the first image and at the same time acts as a trigger for the setting of the next positioning process.
- a photo transistor can be used in the trigger pulse generator, the input signal of which is converted into a digital signal in an AD converter.
- a standard office computer with a RAM memory capacity of more than 40MB can be used as the storage unit, for example.
- the required position data for the pixels to be generated are stored in this memory.
- One byte contains the information for a positioning unit.
- the ready data are transmitted to the positioning units (7) on the basis of the trigger signal. After the data has been transferred, the edge position data are provided.
- Each positioning unit (7) consists of a separate electrical control and a mechanical part.
- the mechanical part can consist of a rotary magnet, for example, which is set to the 16 possible positions by fixed resistors.
- a servomotor stepper motor
Landscapes
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Marketing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4319680A DE4319680A1 (en) | 1993-06-14 | 1993-06-14 | Method and device for generating two- or three-dimensional images in gaseous media |
DE4319680 | 1993-06-14 | ||
PCT/EP1994/001888 WO1994029837A1 (en) | 1993-06-14 | 1994-06-09 | Process and device for producing two- or three-dimensional images in gaseous media |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0704085A1 true EP0704085A1 (en) | 1996-04-03 |
EP0704085B1 EP0704085B1 (en) | 1997-03-26 |
Family
ID=6490315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94920440A Expired - Lifetime EP0704085B1 (en) | 1993-06-14 | 1994-06-09 | Process and device for producing two- or three-dimensional images in gaseous media |
Country Status (4)
Country | Link |
---|---|
US (1) | US5871267A (en) |
EP (1) | EP0704085B1 (en) |
DE (2) | DE4319680A1 (en) |
WO (1) | WO1994029837A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19837425A1 (en) * | 1998-08-18 | 2000-03-02 | Andre Srowig | Device for volumetric reproduction of a three-dimensional image in an autostereoscopic display by means of pulsed plasma generation in a natural atmosphere by means of a single focused laser beam |
DE10127549A1 (en) * | 2001-06-01 | 2002-12-05 | Opto System Gmbh | Variation of radiation behavior in planar, light-guiding transparent body for e.g. lighting or information display, is achieved by varying refractive index locally |
JP3650811B2 (en) * | 2002-02-13 | 2005-05-25 | 株式会社トプコン | Aerial visible image forming device |
AU2003304004A1 (en) * | 2003-03-20 | 2004-10-11 | Anton A. Dremlyuga | Method and device for generating spatial images |
US20060255020A1 (en) * | 2005-05-16 | 2006-11-16 | Igor Troitski | Method for production of laser-induced images inside liquids |
US7710643B2 (en) * | 2007-01-31 | 2010-05-04 | Alion Science And Technology Corporation | Apparatus for and method of delivering visual image into air |
DE102012014364B3 (en) * | 2012-07-20 | 2013-11-28 | Audi Ag | Display device for displaying information in motor vehicle, has display modules to represent display content, which is two-dimensional and to display display content by volume, and laser projectors to produce respective laser beams |
ES2614228B2 (en) * | 2016-09-13 | 2018-01-09 | Defensya Ingeniería Internacional, S.L. | DEVICE FOR THE CREATION OF LIGHT SIGNALING IN THE AREA SURROUNDING ONE OR MORE VEHICLES |
JP2019117227A (en) * | 2017-12-26 | 2019-07-18 | トヨタ自動車株式会社 | On-vehicle device and vehicle system |
EP3951380A4 (en) * | 2020-01-16 | 2022-09-07 | Anhui Easpeed Technology Co., Ltd. | Air ionization display device |
CN111208193A (en) * | 2020-01-16 | 2020-05-29 | 安徽省东超科技有限公司 | Air ionization display device |
DE102020124649A1 (en) | 2020-09-22 | 2022-03-24 | Bayerische Motoren Werke Aktiengesellschaft | METHOD AND DEVICE FOR GENERATION OF A VOLUME GRAPH |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3914655A (en) * | 1973-06-28 | 1975-10-21 | Ibm | High brightness ion source |
DE3805053A1 (en) * | 1988-02-18 | 1989-08-31 | Heinrich Prof Dr Ing Reents | Method and the corresponding devices for guiding a laser beam by means of a flexible mirror surface |
US4870485A (en) * | 1988-09-23 | 1989-09-26 | Fmc Corporation | Three dimensional image generating apparatus having a phosphor chamber |
DE4027471C2 (en) * | 1990-08-30 | 1994-10-13 | Drescher Ruediger | Device for the spatial representation of images |
JPH04180084A (en) * | 1990-11-15 | 1992-06-26 | Hiroshi Daimon | Image displaying device |
DE4128949C2 (en) * | 1991-08-31 | 1994-02-03 | Drescher Ruediger | Device for the spatial representation of images |
JP3174607B2 (en) * | 1992-02-10 | 2001-06-11 | 株式会社日立製作所 | 3D display device |
US5450147A (en) * | 1992-09-28 | 1995-09-12 | The Boeing Company | Method for controlling projection of optical layup template utilizing cooperative targets |
JP2729021B2 (en) * | 1993-10-13 | 1998-03-18 | 株式会社日立製作所 | Method and apparatus for drawing an image by superimposing on starry sky with laser |
-
1993
- 1993-06-14 DE DE4319680A patent/DE4319680A1/en not_active Withdrawn
-
1994
- 1994-06-09 EP EP94920440A patent/EP0704085B1/en not_active Expired - Lifetime
- 1994-06-09 DE DE59402243T patent/DE59402243D1/en not_active Expired - Fee Related
- 1994-06-09 WO PCT/EP1994/001888 patent/WO1994029837A1/en active IP Right Grant
- 1994-07-09 US US08/564,111 patent/US5871267A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9429837A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1994029837A1 (en) | 1994-12-22 |
US5871267A (en) | 1999-02-16 |
DE59402243D1 (en) | 1997-04-30 |
EP0704085B1 (en) | 1997-03-26 |
DE4319680A1 (en) | 1994-12-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0704085B1 (en) | Process and device for producing two- or three-dimensional images in gaseous media | |
DE3924605C2 (en) | Scanning electron microscope | |
GB2408905A (en) | Backscatter imaging using Hadamard transform masking | |
EP2858358A1 (en) | Display or projector device for a video signal, lighting module and calibration method for same | |
DE60102597T2 (en) | HIGH-PERFORMANCE LASER AND ITS APPLICATION FOR GENERATING LIGHT IN EXTREME UV RANGE | |
WO2001007942A1 (en) | Method, device and laser system for producing screen holograms, and screen hologram | |
WO2000011513A1 (en) | Device for the volumetric reproduction of a three-dimensional image by pulsed plasma generation in a natural atmosphere, using a focused laser beam | |
Landen | High‐resolution time‐and two‐dimensional space‐resolved x‐ray imaging of plasmas at NOVA | |
DE2116288A1 (en) | cathode ray tube | |
TW337023B (en) | Color cathode ray tube | |
US3546375A (en) | Three-dimensional terrain mapping system | |
US5017829A (en) | Framing camera | |
DE1762400A1 (en) | Method and device for the optical display of messages transmitted by electrical signals | |
DE1278118B (en) | Method and arrangement for distance measurement with a pulse laser as transmitter | |
JPS61500381A (en) | Acousto-optic character generator and method | |
DE3325855A1 (en) | DEVICE FOR GENERATING A SIGNAL ACCORDING TO A FOLDING PRODUCT OF TWO FUNCTIONS | |
DE873256C (en) | Arrangement for making magnetic fields or electrical charge patterns visible | |
DE3831180C2 (en) | Image recording device for image registration of X-ray radiation images with a high image frequency | |
DE2953706T1 (en) | ||
DE19544068A1 (en) | Video image projection system onto screen | |
Freeman | Negative ions point the way forward in multiphoton ionization | |
DE102016119819B3 (en) | Apparatus and method for the optical measurement of three-dimensional surfaces | |
DE3912188A1 (en) | Laser surface marking device e.g. for electric cables - uses concentration of laser beam after passing through aperture mask | |
DE19814205C1 (en) | Visualization method for surface characteristics of micro object e.g. for microelectronics, micro chemistry, micro optics or micro mechanics | |
DE29518766U1 (en) | Video projection system |
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: 19951123 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
17Q | First examination report despatched |
Effective date: 19960503 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
REF | Corresponds to: |
Ref document number: 59402243 Country of ref document: DE Date of ref document: 19970430 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19970623 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20000616 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000619 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010609 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20010609 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020228 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20030829 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050101 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050609 |