EP3921699A1 - Device for projecting an image such as a safety sign and/or a message onto a surface - Google Patents
Device for projecting an image such as a safety sign and/or a message onto a surfaceInfo
- Publication number
- EP3921699A1 EP3921699A1 EP20709269.3A EP20709269A EP3921699A1 EP 3921699 A1 EP3921699 A1 EP 3921699A1 EP 20709269 A EP20709269 A EP 20709269A EP 3921699 A1 EP3921699 A1 EP 3921699A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- image
- mask
- lens
- optical
- light
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
-
- 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
-
- 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
- G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
Definitions
- the present invention relates to a device for projecting an image such as a safety sign, of the zebra type for example, and / or a message on a surface such as the ground for example, and a manufacturing process an optical mask for producing the device according to the invention.
- these safety signs on the ground are produced by means of special paints of white color or colored using a stencil or not.
- these safety signs painted on the ground have the drawback that they have to be redone after a relatively short time, because they disappear from the ground.
- these safety signs get dirty very quickly, so that after a short time they are no longer sufficiently visible.
- these safety signs are affixed to the ground outside the building, they are subjected to bad weather, so that the arrangement of the color after a certain time makes it necessary to restore them.
- the installation of these painted safety signs requires preliminary cleaning of the floor as well as a drying time, which increases the cost of producing these signs.
- Document FR 1 073 093 describes safety signaling devices consisting of sheets or strips of a mixture of thermoplastic synthetic materials based on suitably softened polyvinyls and esters of a polyacrylic acid with the addition of white pigments or colored, these sheets or strips being provided with an adhesive layer, and being fixed to the support by means of an adhesive of the same nature placed on this support.
- This mixture of plastics has a very high resistance to abrasion, equal to about two and a half times that of leather; it is weather-resistant and, by a suitable choice of plasticizer, it can be made insensitive to temperature variations in a range from about -15 to + 100 ° C.
- Document US 2014/0204347 describes a device projecting an image onto a surface such as a wall or a floor.
- Said device comprises a source of bright light, preferably comprising a set of light-emitting diodes called LEDs, said light from this light source passing through one or more lenses called condenser in order to make it more uniform.
- These condenser lenses consist of aspherical or spherical lenses.
- the light then passes through a so-called mask image plate containing a small version of the image to be displayed.
- a focus assembly which includes a focusing lens, a compensating lens, a variation lens, a rear lens, and a front lens, with all lenses centered. on the projection axis.
- the focusing assembly creates a desired projected image on a target surface such as a wall or floor, the projected image being a representation of the image contained on the image plate.
- Document EP 0 677 160 is also known, which describes a lamppost delivering light in a desired pattern on the ground.
- Said lamppost comprises a pole forming a light conduit having a proximal end and a distal end, an extended source of near-collimated light emitted near the distal end of said conduit and a light distribution member more distal from said source an array of light, wherein reflected light from said light distribution element illuminates a surface near said lamppost in a precise and predetermined pattern.
- Said light distribution element includes a light mask. light which is adapted to block a specified portion of the light emanating from the extended light source.
- One of the aims of the invention is therefore to remedy at least one of these drawbacks by proposing a device for projecting safety signs on the ground of simple and inexpensive design and providing a projected image of which the contrast is sufficient to be visible in all lighting conditions.
- a device for projecting an image such as safety signage and / or a message on a surface such as the floor or a wall comprising at least a light source and an optical system comprising at least one optical lens; said device is remarkable in that it comprises at least means for producing an image and / or a message from a light source, at least one converging lens which focuses the collimated beams of the image on the entrance pupil of a hypergonic lens, also called a fisheye lens, or a wide-angle lens.
- a hypergonic lens also called a fisheye lens, or a wide-angle lens.
- the means for producing the image comprise a light source consisting of a plurality of light-emitting diodes called LEDS extending in pairs on either side.
- said means capable of collimating the beams of light emitted by said LEDS consist of at least one condensing mirror.
- Said condenser mirror is made up of two pairs of parabolic mirrors extending on either side of a plane of symmetry, said plane of symmetry extending parallel to the optical axis of the device.
- the light source consists of four light-emitting diodes called LEDS extending respectively to the right of each parabolic mirror of the condenser mirror.
- the means for producing the image consist of a scanning laser forming an image on a fluorescent membrane, said fluorescent membrane emitting light at the impact zones of the laser beams on said membrane.
- Said fluorescent membrane is reflective or transparent.
- Said scanning laser consists of a laser emitting a ray on a polygonal mirror driven in rotation about its axis and of a reflecting mirror capable of reflecting the laser beams parallel to the optical axis of the device.
- Another object of the invention relates to a method of manufacturing an optical mask for producing a device for projecting an image onto a surface according to the invention, said method is remarkable in that it comprises at least the following steps of:
- said mask is printed by stereolithography from said digital model.
- the mask has a thickness of between 0.1 and 5 mm as well as the shape of an equiangular quadrilateral.
- Figure 1 is a schematic perspective representation of the device according to the invention.
- Figure 2 is a schematic perspective representation of the light source and a condenser mirror of the device according to the invention
- FIG. 3 is a representation of the spatial distribution and of the angular distribution of the light flux at the output of the condenser mirror;
- FIG. 4 is a schematic representation of a zebra-type safety signaling image produced by the device according to the invention.
- Figure 5 is a schematic representation of the measurements for the manufacture of an optical mask for the device according to the invention.
- FIG. 6 is a schematic representation of an alternative embodiment of the device according to the invention.
- a device for projecting a safety sign of the zebra type i.e. a sign in the form of white or yellow hatching, will be described below; however, it is obvious that the device according to the invention will be able to project an image such as a safety sign and / or a message on a surface such as the floor or a wall without departing from the scope of the invention.
- the device for projecting an image such as safety signage and / or a message on a surface such as the floor or a wall comprises means of production of an image and / or message 1, collimating means 2 towards at least one converging lens 3 which focuses the collimated beams on the entrance pupil of a hypergonic lens 4, also called a fisheye lens.
- Said means for producing the image 1 comprise a light source 5 consisting of a plurality of light-emitting diodes called LEDS 6 extending in pairs on either side of means 2 capable of collimating the beams of light emitted by said LEDS 6 towards at least one converging lens 7 which focuses the collimated beams on the entrance pupil of the hypergonic lens 4, a mask 8 extending on the optical axis between the converging lens 7, said mask comprising an image of a zebra, and the hypergone lens 4.
- Said LEDs 6 consist, for example, of LEDS marketed by the company CREE under the reference HXP35.
- said means 2 adapted to collimate the beams of light emitted by said LEDS 6 consist of a condenser mirror 9.
- Said condenser mirror 9 consists of two pairs of Off-axis parabolic mirrors 10 extending on either side of a plane of symmetry, said plane of symmetry extending parallel to the optical axis of the device.
- An LED 6 extends to the right of each parabolic mirror 10.
- each parabolic mirror 10 has a conicity of -1, a lateral shift of 10 mm, an angular shift of 90 ° and a RoC of 10. mm.
- each parabolic mirror 10 may have a shift of between 5 and 15 mm and an angular shift of between 60 and 120 °, depending on the position and orientation of the LEDs 6, without going out. within the scope of the invention.
- the light source 5 consists of four light-emitting diodes called LEDS 6 extending respectively to the right of each parabolic mirror 10 of the condenser mirror 9, FIG. 3 showing the spatial distribution of the output flux mirrors 10 and the angular distribution of the flux at the outlet from mirrors 10 respectively, the beam being collimated as can be seen.
- the light source can include any number of LEDS 6 and that the condenser mirror 9 will then include as many parabolic mirrors 10 as LEDS 6 without departing from the scope of the invention.
- the device according to the invention allows to project an image of a zebra on the ground with great sharpness and great contrast so that it can be visible in all conditions lighting thus allowing use both outdoors, day and night, as well as indoors.
- the zebra thus obtained present comprises a succession of white and black bands.
- the hypergone lens 4 may be provided at the outlet of the housing with a yellow filter or a filter of any other color respectively, not shown in the figures.
- the device also comprises a casing receiving the various optical elements of the invention as well as an electronic card controlling the light source, not shown in the figures.
- fisheye hypergone 4 lens may be substituted by a wide angle lens without departing from the scope of the invention.
- Another object of the invention relates to a method of manufacturing an optical mask for the production of a device for projecting an image on a surface according to the invention.
- said method according to the invention which can be implemented by means of a computer program comprises the following steps of:
- said mask is printed by stereolithography from said digital model thus obtained and the mask has a thickness of between 0.1 and 5 mm as well as a shape of an equiangular quadrilateral.
- said mask can be obtained by laser cutting from the digital model or by any other method well known to those skilled in the art and that said mask can have any quadrilateral shape, in particular when the projection axis of the device is not normal to the marking surface, without departing from the scope of the invention.
- the device for projecting an image such as safety signage and / or a message on a surface such as the ground or a wall comprises, in the same way as above, means for producing an image and / or a message 1, at least one converging lens 3 which focuses the collimated beams on the entrance pupil of a hypergone 4 lens, also called a fisheye lens.
- the means for producing the image 1 consist of a scanning laser 11 forming an image on a fluorescent membrane 12, said fluorescent membrane 12 emitting light at the impact zones of the laser beams on said membrane 12.
- Said scanning laser 11 consists of a laser 13 emitting a ray on a polygonal mirror 14 driven in rotation around its axis and of a reflecting mirror 15 able to reflect the laser beams parallel to the axis optical device.
- the fluorescent membrane 12 is transparent; however, it is quite obvious that said fluorescent membrane 12 could be reflective without however departing from the scope of the invention.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Marketing (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Lenses (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1901187A FR3092406B1 (en) | 2019-02-06 | 2019-02-06 | Device for projecting an image such as a safety sign and / or a message on a surface |
PCT/FR2020/050179 WO2020161427A1 (en) | 2019-02-06 | 2020-02-04 | Device for projecting an image such as a safety sign and/or a message onto a surface |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3921699A1 true EP3921699A1 (en) | 2021-12-15 |
Family
ID=67185268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20709269.3A Withdrawn EP3921699A1 (en) | 2019-02-06 | 2020-02-04 | Device for projecting an image such as a safety sign and/or a message onto a surface |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3921699A1 (en) |
FR (1) | FR3092406B1 (en) |
WO (1) | WO2020161427A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1073093A (en) | 1952-03-19 | 1954-09-20 | Gebru Der Bornefeld K G | Process for providing a paved or asphalt road surface with traffic signs |
NL8901077A (en) * | 1989-04-28 | 1990-11-16 | Koninkl Philips Electronics Nv | OPTICAL EXPOSURE SYSTEM AND PROJECTION DEVICE EQUIPPED WITH SUCH A SYSTEM. |
CA2152678A1 (en) | 1992-12-31 | 1994-07-21 | Roger H. Appeldorn | Pole light having a programmable footprint |
JPH07270719A (en) * | 1994-03-29 | 1995-10-20 | Mitsubishi Electric Corp | Projection type display device |
US20120069180A1 (en) * | 2009-05-26 | 2012-03-22 | Panasonic Electric Works Co., Ltd. | Information presentation apparatus |
JP2014002176A (en) * | 2012-06-15 | 2014-01-09 | Ushio Inc | Light source device and projector |
US20140204347A1 (en) | 2013-01-22 | 2014-07-24 | Qunomic Virtual Technology, LLC | Message Projection System |
-
2019
- 2019-02-06 FR FR1901187A patent/FR3092406B1/en active Active
-
2020
- 2020-02-04 EP EP20709269.3A patent/EP3921699A1/en not_active Withdrawn
- 2020-02-04 WO PCT/FR2020/050179 patent/WO2020161427A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2020161427A1 (en) | 2020-08-13 |
FR3092406A1 (en) | 2020-08-07 |
FR3092406B1 (en) | 2021-10-15 |
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