HOLOGRAPHIC DISPLAY DEVICE COMPRISING MAGNETO-OPTICAL SPATIAL LIGHT MODULATOR

• US 20110149018A1
• Filed: 10/26/2007
• Published: 06/23/2011
• Est. Priority Date: 10/26/2006
• Status: Abandoned Application

• Current Assignee: SeeReal Technologies S.A.
• Original Assignee: SeeReal Technologies S.A.
• Inventors: Haussler, Ralf, Kroll, Bo, Schwerdtner, Armin, Leister, Norbert
• Application Number:
  US12/447,149
• Publication Number:
  US 20110149018A1
• Time in Patent Office: Days
• US Class Current: 348/40
• CPC Class Codes: G03H 1/02 Details of features involved during the holographic process; Replication of holograms without interference recording
• CPC Class Codes: G03H 1/2205 using downstream optical component
• CPC Class Codes: G03H 1/2249 Holobject properties
• CPC Class Codes: G03H 1/2294 Addressing the hologram to an active spatial light modulator
• CPC Class Codes: G03H 2001/0224 Active addressable light modulator, i.e. Spatial Light Modulator [SLM]
• CPC Class Codes: G03H 2001/2218 being perpendicular to optical axis
• CPC Class Codes: G03H 2001/2242 Multiple viewing windows
• CPC Class Codes: G03H 2001/2292 Using scanning means
• CPC Class Codes: G03H 2001/2297 using frame sequential, e.g. for reducing speckle noise
• CPC Class Codes: G03H 2001/261 in optical contact
• CPC Class Codes: G03H 2001/264 One hologram being a HOE
• CPC Class Codes: G03H 2001/303 Interleaved sub-holograms, e.g. three RGB sub-holograms having interleaved pixels for reconstructing coloured holobject
• CPC Class Codes: G03H 2210/20 2D object
• CPC Class Codes: G03H 2210/30 3D object
• CPC Class Codes: G03H 2222/22 Spatial coherence
• CPC Class Codes: G03H 2222/34 Multiple light sources
• CPC Class Codes: G03H 2222/35 Transverse intensity distribution of the light beam
• CPC Class Codes: G03H 2223/19 Microoptic array, e.g. lens array
• CPC Class Codes: G03H 2225/20 Nature, e.g. e-beam addressed
• CPC Class Codes: G03H 2225/22 Electrically addressed SLM [EA-SLM]
• CPC Class Codes: G03H 2225/33 : Complex modulation
• CPC Class Codes: G03H 2225/55 : Having optical element registered to each pixel
• CPC Class Codes: G03H 2225/60 : Multiple SLMs
• CPC Class Codes: G03H 2226/05 : Means for tracking the observer
• CPC Class Codes: G03H 2227/02 : Handheld portable device, e.g. holographic camera, mobile holographic display
• CPC Class Codes: G03H 2227/05 : Support holding the holographic record
• CPC Class Codes: G03H 2240/61 : SLM related parameters, e.g. pixel size
• CPC Class Codes: H04N 5/66 : Transforming electric information into light information scanning details H04N3/00

Abstract

A holographic display device comprising at least one magneto-optical spatial light modulator (MOSLM). The holographic display device may comprise a first MOSLM and a second MOSLM, the first and second MOSLMs encoding a hologram and a holographic reconstruction being generated by the device. An advantage of the device is fast encoding of holograms.

Claims

1. A holographic display device comprising at least one magneto-optical spatial light modulator (MOSLM).

2. Holographic display device of claim 1 comprising a first MOSLM and a second MOSLM, the first and second MOSLMs encoding a hologram and a holographic reconstruction being generated by the device.

3. Holographic display device of claim 2, in which the first MOSLM and the second MOSLM modulate amplitudes and phases of an array of hologram pixels in a controlled independent manner.

4. Holographic display device of claim 2 comprising a compact combination of the first MOSLM and the second MOSLM which is used to modulate the amplitude and the phase of light in sequence and in a compact way such that a complex number, which consists of an amplitude and a phase, is encoded in the transmitted light, on a pixel by pixel basis.

5. Holographic display device of claim 1 comprising a compact combination of an MOSLM and a compact light source of sufficient coherence, the combination being capable of generating a three dimensional image under suitable illumination conditions.

6. Holographic display device of claim 1 comprising a large magnification three dimensional image display device component incorporating a compact combination of one or two MOSTMs1 with holographic reconstruction of the object.

7. Holographic display device of claim 1, which incorporates a compact combination of one or two MOSLMs and which may also be used as a projector.

9. Holographic display device of claim 1 in which the device modulates light using the Faraday effect.

10. Holographic display device of claim 9, where the Faraday effect is realized using a magneto-photonic crystal or where the Faraday effect is realized using doped glass fibers or where the Faraday effect is realized using a magneto-optical film.

13. Holographic display device of claim 1, in which holographic reconstruction is visible through a virtual observer window.

14. Holographic display device of claim 13, in which virtual observer windows can be tiled using spatial or time multiplexing.

15. Holographic display device of claim 1, in which the display is operable to time sequentially re-encode a hologram on the hologram-bearing medium for the left and then the right eye of at least one observer.

17. Holographic display device of claim 1, in which the display has an element for beam steering, or a beamsplitter.

18. Holographic display device of claim 1, in which the display has a CIAD layer.

21. Holographic display device of claim 1, in which the device is a television or a monitor or in which the device is portable.

25. A method of generating a holographic reconstruction comprising the step of using the display device of claim 1.

26. Holographic display device of claim 1 in which a beam steering element is present for tracking virtual observer windows (VOWs), the beam steering element comprising of controllable prism arrays with prism elements, the prism array especially being in the form of an electro-wetting prism array, a prism element comprising electrodes and a cavity filled with two separate liquids and an interface between the liquids, the slope of the interface between the liquids being electrically controllable by applying voltage to the electrodes.

8. (canceled)

11-12. -12. (canceled)

16. (canceled)

19-20. -20. (canceled)

22-23. -23. (canceled)

24. Method of manufacturing a holographic display device, including the steps of taking a glass substrate and successively printing or otherwise creating the layers for an MOSLM on the substrate.