# US 2009/0153928 A1 · Engine for video projection/digitiser/digital radar with multiple electromagnetic radiation beams

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- Number: US 2009/0153928 A1
- Document ID: US20090153928A1
- Status: Published application
- Kind: A1
- Application number: 12/279,576
- Filed: 2007-02-15
- Published: 2009-06-18
- Earliest claimed: 2006-02-16
- Inventors: Jean-Marc Desaulniers
- Web page: https://patentgrep.com/patent/US20090153928A1

## CPC

- H04N 9/3129: {scanning a light beam on the display screen (scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161)}
- G02B 26/10: Scanning systems
- G02B 26/123: {Multibeam scanners, e.g. using multiple light sources or beam splitters}
- G09F 19/18: involving the use of optical projection means, e.g. projection of images on clouds (projection apparatus per se G03B)
- H04N 3/08: having a moving reflector
- H04N 9/3141: {Constructional details thereof (details not peculiar to the presence of an electronic spatial light modulator G03B21/14)}
- G01S 7/4814: {of transmitters alone}
- G01S 7/4817: {relating to scanning}
- H04N 13/20: Image signal generators
- H04N 13/363: using image projection screens (volumetric display H04N13/388)
- H04N 13/388: Volumetric displays, i.e. systems where the image is built up from picture elements distributed through a volume
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

Engine for video projection/digitiser/digital radar with multiple electromagnetic radiation beams for carrying out the projection or recording in 2D or 3D on any surface or in any volume. The invention relates to an optical digital video projection device for multi beam projection onto any surface or into any volume in 2D or 3D, within a solid angle from 0° to 360°, for example, 180, 270, or 360°. The device can also be used in digitiser and/or radar function for the recording/digitisation of spatial and frequency information. The processing of electromagnetic radiation, for example, visible, infrared ultraviolet, microwave radiation in lime, space and frequency either passively or actively for example, by means of mirror/filter windows permits a filter function specific to the target applications. The source uses a light source comprising, for example, a number of weak/medium/high power lasers coupled to a number of optical sources, optical source modules, coloured beam generators or optical matrix heads. The digitisation function uses, for example, a number of photodiode capture devices, charge coupled devices (CCD), etc. The function for digitisation/optical radar in 2D or 3D using light beams permits use in different types of application, in telecommunications, for road maritime, aerial or space navigation.

## Claims

### Claim at position 1

1-14. (canceled)

### Claim 15

A 2D/3D multibeam scanning synchrone video projection and/or digital recording device characterized by:
a radial optical matrix head structure including a pyramidal-shaped or cone-shaped central addressing periscope, the periscope is equipped with mirrors and filters, the aforesaid structure being equipped of lasers sources shared out at the central addressing periscope periphery, where the sources may be declined
a) as optical sources modules, or
b) as radial optical matrix heads with a pyramid of mirrors with lasers sources at the periphery,
c) as pavements of mirrors and filters;
a certain number of light beams, from the optical matrix head, structured as matrix, and pointing to a certain number of optical rotating discs with a certain number of mirrors and filters digitally locked,
the pyramidal or cone-shaped central addressing periscope having a specific arrangement of mirrors and filters so that different beams, from lasers sources and redirected by the central addressing periscope, could be oriented in the three dimensions through the device,
the device allowing the projection of an images sequence by scanning from a series of reflections/transmissions, onto any surface or into any volume, and allowing the 2D or 3D recording/digitisation, within a solid angle from 0° to 360°.

### Claim 16 (depends on 15)

A device according to claim 15 characterized by a certain number of incident electromagnetic beams sensors at the periphery, as digitiser.

### Claim 17 (depends on 15)

A device according to claim 15 characterized by a certain number of incident electromagnetic beams sensors at the periphery, from an emergent beams reflection of the device onto any surface or into any volume, as radar.

### Claim 18 (depends on 15)

A device according to claim 15 characterized by a revolution solid-shaped structure with a certain number of filters windows shared out with specific layout, fixed or in rotation, enabling spatial addressing of any solid angle.

### Claim 19 (depends on 15)

A device according to claim 15 characterized by mirrors and/or filters windows provided with a specific passive or active transfer function modifying a certain number of beams physical properties crossing them on a given area, with a specific shape function of the structure, where, according to the spatial addressing zone inside a solid angle from the line or point type scanning function, mirrors and filters including a certain number of superimposed layers, having specific physical characteristics, enable spatial, frequency, temporal filtering and a recording of information through an active element, as semi-conductor or photodiode, these mirrors/filters windows could be polarising filters, index gradient filters, frequency filters or any combination of these last ones.

### Claim 20 (depends on 15)

A device according to claim 15 characterized by a pyramidal-shaped addressing periscope where a certain number of structures, pyramidal-shaped, cone-shaped, steps-shaped, positioned or not on a trim-corrected device, enabling deflection or orientation of beams between sources or sensors and mirrors and filters of optical rotating discs, this periscope allowing to shape out a certain number of sources or sensors on a certain number of levels, or rings, positioned above or below optical rotating discs.

### Claim 21 (depends on 15)

A device according to claim 15 characterized by a pyramidal-shaped addressing periscope associated with sources arranged at the periphery, allowing the simultaneous addressing of a certain number of mirrors/filters shared out on a number of sectors on a number of optical rotating discs, where these different sectors of an optical rotating disc are on the same level or placed on steps.

### Claim 22 (depends on 15)

A device according to claim 15 characterized by a pyramidal-shaped addressing periscope fits out a deflection device of beams, from a certain number of sources, having a number of mirrors/filters fixed over the surface or engraved in the device, pyramidal-shape, cone-shaped, steps shaped, according to an arrangement enabling simultaneous addressing of a certain number of sectors, on a certain number of optical rotating discs with a certain number of levels including optical sources modules having static or dynamic pointing correction, of coloured pixel generators, or optical matrix heads and a static or dynamic trim-corrected device.

### Claim 23 (depends on 15)

A device according to claim 15 characterized by a variant of the optical rotating disc with an on-board periscope having a certain number of optical lanes allowing to address a deflection device, a pyramid or a cone, fixed or in rotation arranged on the central axis of the optical rotating disc, with a certain number of sources shared out at the periphery of the optical rotating disc, the optical lanes may have a certain number of mirrors and filters having a specific orientation allowing to address a certain number of other mirrors and/or filters laid over the surface or engraved in the optical rotating disc device.

### Claim 24 (depends on 15)

A device according to claim 15 characterized by a certain number of optical sources modules, or a certain number of coloured pixel generators, or a certain number of optical matrix heads, crowns/pyramidal-shaped or pavements of mirrors and filters, or optical matrix heads with a number of deflection pyramids.

### Claim 25 (depends on 15)

A device according to claim 15 characterized by a rotating and lift stage on air-cushion used inside a multibeam scanning video projection and/or digital recording device, characterized by the rotation of optical rotating discs or stand structure of filters windows, by means of an air flow which, through a certain number of openings shared out in a specific way at the periphery of the stage, accomplishes the lift and, where another air flow imposes the rotation by means of fins having a specific orientation, shared out at the periphery of the device to set in rotation.

### Claim 26 (depends on 15)

A device according to claim 15 characterized by another embodiment of the rotating and lift stage performed by electromagnetic field.