Apparatus and method for processing holographic data reproduced from a holographic medium

一种全息介质、数据的技术，应用在光学记录/再现/擦除方法、图像数据处理、使用光学干涉图样进行记录/再现/擦除等方向，能够解决取样方法误差等问题

Inactive Publication Date: 2005-05-18
MAPLE VISION TECH
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Problems solved by technology

In other words, if the detection data image is not composed of (M1*P1)×(M2*P2) image pixels, the traditional sampling method will produce errors

Method used

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  • Apparatus and method for processing holographic data reproduced from a holographic medium
  • Apparatus and method for processing holographic data reproduced from a holographic medium
  • Apparatus and method for processing holographic data reproduced from a holographic medium

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Embodiment Construction

[0032] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] figure 2 A schematic diagram representing an apparatus for storing and reproducing holographic data, where pairing with figure 1The same reference numerals are used for the same parts of the conventional apparatus shown, and thus the description of its operation will not be repeated.

[0034] First, the binary input data to be stored is arranged in the form of M1×M2 data pixels based on a page in the data arrangement unit 150 , where M1 and M2 are positive integers respectively. In this case, the data at the edge of the rectangle (brim data) is also arranged around the arranged data of M1×M2 data pixels. Hereinafter, arranged data having arranged brims is referred to as an arranged mode, and the application of the arranged brims will be described later.

[0035] The SLM 50 modulates the signal beams with the aligned pattern for each page to pr...

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Abstract

In an apparatus for processing holographic data reproduced from a holographic medium, the data arrangement unit is for arranging input data in the form of M1×M2 data pixels according to pages and thereby generating arranged data. Then, the holographic data detector outputs a page image including a detected data image, and each data pixel of the arranged data corresponds to a P1×P2 pixel image of the detected data image. In turn, the pixel adjustment detector ascertains the adjusted vertical length V and the adjusted horizontal length H of the detection data image. Finally, the sampling unit extracts image pixels at different intervals according to whether the horizontal length and / or vertical length of the detection data image increases or decreases.

Description

field of invention [0001] The present invention relates to a holographic data reproducing system, and more particularly to an apparatus and method for processing holographic data reproduced from a holographic medium, which correct image distortion in a reproducing mode. technical background [0002] It is well known that the demand for a large volume holographic digital data storage system capable of storing a large amount of data such as motion picture film data has been increasing, and recently various holographic digital data storage systems realizing high-density optical storage capabilities have been developed. [0003] The large-capacity holographic digital data storage system makes the signal beam containing information interfere with the reference beam to generate an interference pattern, and then controls the interference pattern to be stored in a storage medium made of photorefractive crystals. The photorefractive crystal is a material that can contribute different...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/22G02B5/32G06T3/40G11B7/0065G11C13/04H04N1/393
CPCG02B5/32G11B7/0065G11C13/042
Inventor 姜秉福
Owner MAPLE VISION TECH
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