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Holographic projector for enlarging a reconstruction zone

A holographic projection and three-dimensional technology, applied in projection devices, holographic technology, three-dimensional systems, etc., to achieve the effect of precise resolution, large reconstruction three-dimensional size or viewing angle

Active Publication Date: 2009-02-18
SEEREAL TECHNOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, these benefits come at the cost of additional noise, since the phase mask is the same for each object, and their values ​​are distributed randomly when increasing the resolution

Method used

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  • Holographic projector for enlarging a reconstruction zone
  • Holographic projector for enlarging a reconstruction zone
  • Holographic projector for enlarging a reconstruction zone

Examples

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Embodiment Construction

[0041] FIG. 1 shows a wavefront modulated by a known phase-modulated light modulator, where each pixel represents only a specific phase difference between the adjusted wave and a reference wave. The wavefront modulated by such an optical modulator can be expressed in an idealized form such as a series of square wave functions in a coordinate system. The coordinates of the wavefront on the optical modulator are marked on the abscissa, while the phase difference modulus 2π is marked on the ordinate. Therefore, a preferred phase modulation would be performed in the range of 0 to 2π. According to the wavefront scanning method, only approximate values ​​can be obtained for such light modulators. Light modulators will need greater resolution (or pixel count) to improve the accuracy of this approximation. The larger the value, the larger the stereoscopic size that can be reconstructed.

[0042] In order to achieve more accurate phase reconstruction and thus increase the reconstruc...

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Abstract

The invention relates to a holographic projector (1) having an arrangement of mirror elements (3) designed as micro-mirrors. In order to enlarge a reconstruction zone (18) of a reconstructed scene, the holographic projector (1) has at least one light-shaper (2, 2R, 2G, 2B) which contains the arrangement of mirror elements (3). Each of the mirror elements (3) has at least one actuator (4). The respective actuators (4) of the mirror elements (3) tilt and / or move the mirror elements (3) axially in at least one direction. A wave front (W) for representing the reconstructed scene is thus directly shaped. The holographic projector (1) has an optical system (9) for reproducing the shaped wave front (12, 12R, 12G, 12B, 12L) in at least one viewing window (15, 15R, 15L, 28L) of a viewing plane (16).

Description

technical field [0001] The invention relates to a holographic projection device comprising an array of mirror elements. The invention also relates to a method for zooming in on the reconstructed volume in order to observe the reconstructed (in particular three-dimensional) scene, wherein an illumination device with at least one light source emits substantially coherent light. Background technique [0002] Holography enables three-dimensional recording and optical representation of objects using lightwave-optic methods. Reconstruction (commonly called reconstruction) of a hologram, depending on the type of hologram, is accomplished by illuminating the medium bearing the hologram with coherent light. The existing holographic projection devices are too small for viewing (especially) three-dimensional scenes due to reconstruction space or viewing angle. [0003] Usually, the result of the reconstruction is directly viewable, i.e., the viewer directly looks at the computer-gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/00G03H1/22G03B21/62
CPCG03H2001/2242G02B27/0093G03H2001/2239G03H2225/11G03H2001/2292G03H2226/05G03H2222/24G03H2001/221G03H2001/2218G03H2210/30G03H2001/2271G03H2222/22G03H1/2294G03H1/02G03H1/2205G03H2225/24G03H2001/0224G03H2210/20G03H2225/33G03H2225/32G03H2240/43H04N5/74G03H1/22G03H1/08
Inventor 菲利普·瑞德-乔德
Owner SEEREAL TECHNOLOGIES
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