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Apparatus and method for displaying a holographic video image sequence

A technology for video images and images, which is applied to equipment and fields for displaying holographic video image sequences, can solve problems such as inability to use real-time applications and insufficient image quality for display applications, and achieve improved noise reduction technology and improved display efficiency. , the effect of small light loss

Active Publication Date: 2007-02-21
CAMBRIDGE ENTERPRISE LTD
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AI Technical Summary

Problems solved by technology

However, the computational complexity of current holographic generation algorithms prevents them from being used in real-time applications
Also, even though existing algorithms are fast enough, the quality of the images produced by them is not good enough for display applications

Method used

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Embodiment Construction

[0021] In the following description, the same reference numerals are used to denote the same components in the respective drawings.

[0022] In general, the present application relates to an apparatus for projecting video images from computer-generated phase-only holograms, commonly known as kinoforms. The kinoforms must be able to be reconstructed rapidly so that they can be displayed on pixelated liquid crystal on silicon (LCOS) spatial light modulators that have been constructed to operate efficiently as phase-only modulators. The LCOS phase-only SLM is illuminated by a suitably expanded beam from a partially coherent light source (e.g., a laser or a superluminescent light-emitting diode, LED), and the phase-only kinoform is converted into a real intensity image in the far field. ). This far field can be brought closer using a projection lens for Fourier transformation. By using fast hardware-based processors (such as FFT, FPGA, and DS processors), and by, for example, us...

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PUM

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Abstract

A method of displaying a video image comprises receiving sequential image frames at a processor. Each image frame is processed to obtain a kinoform. A programmable diffractive element such as an SLM represents the sequence of kinoforns allowing reproduction of the image using a suitable illumination beam.

Description

technical field [0001] The present invention relates to a device and a method for displaying video images, for example using holography. Background technique [0002] Various devices are known for displaying images using holography, for example using computer holography (CGH). One of these known devices is described in US6437919, in which an electrically addressable spatial light modulator (SLM) is addressed to provide a 3D holographic representation of an image. Thus, when the SLM is illuminated by a suitable illumination source, the image is reconstructed in the playback field (RPF). [0003] The problem with existing projection displays, such as holographic displays, is that light efficiency is low, and 3D displays require a large number of pixels. [0004] Furthermore, holographically generated 2D video images are known to have significant advantages over conventional projected video images, especially in terms of clarity and efficiency. However, the computational com...

Claims

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Application Information

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IPC IPC(8): G03H1/08G03H1/22G03H1/32
CPCG03H1/2294G03H2001/2218G03H1/2249G03H1/2205G03H2001/306G03H2001/261G03H2226/02G03H1/0841G03H2225/55G03H2225/32G03H2240/41G03H2225/60G03H2222/35G03H2001/0816G03H2225/25G03H2001/2215G03H2225/31G03H2225/52G03H2210/30G03H2223/55G03H2210/20G03H1/0808G03H2001/085G03H2240/51G03H2001/2297G03H2210/40G03H2240/42G03H2210/454G03H2001/2231G03H2223/13G03H2001/2271G03H2001/2255G03H1/08G03H2225/61G03H1/2286G03H1/00G03H1/22G03H1/2645
Inventor 威廉·克罗斯兰尼尔·科林斯爱德华·巴克利阿德里安·凯布尔尼古拉斯·劳伦斯彼得·马什蒂莫西·威尔金森
Owner CAMBRIDGE ENTERPRISE LTD
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