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A Holographic Storage Disc Structure

A disk and holographic technology, applied in the field of holographic storage disk structure, can solve the problems of reduced interference ratio between reference light and signal light, and unhelpful storage capacity

Active Publication Date: 2018-03-09
青岛泰谷光电工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In addition, if the focal point area is narrowed by shortening the focal length of the objective lens, the interference ratio between the reference light and the signal light will be greatly reduced, which is not conducive to the improvement of the storage capacity

Method used

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  • A Holographic Storage Disc Structure
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  • A Holographic Storage Disc Structure

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Embodiment Construction

[0052] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0053] In order to solve the technical problem in the prior art that the total exposure range of the recording material on the disc exceeds the range actually required for information storage when recording information, the present invention proposes a new holographic storage disc structure, in which the Add a low refractive index area or reflective material to form a cavity whose entrance area is equivalent to the size of the minimum focal area (Nyquist aperture) required for the signal to pass through, so that the light will only be limited within the cavity after entering the disc , thereby limiting the diffusion area of ​​writing light, reducing exposure loss, increasing the utilization rate of holographic storage materials, and improving the storage capacity of the disk.

[0054] image 3 and Figure 4 It shows the reflective structure created ...

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Abstract

The invention provides an ultrahigh capacity holographic storage disc structure. A cavity formed by a reflection structure is formed in a holographic storage disc to limit the writing-in light diffusion area, and accordingly, the reference light and signal light mixing degree is improved, and the holographic storage material utilization rate is improved.

Description

technical field [0001] The invention relates to an ultra-high-capacity holographic storage disk structure, and more particularly relates to a holographic storage disk with reflective cavities in the storage material. Background technique [0002] The biggest limitation of the storage capacity of the traditional holographic storage system is that when each page is written to the disk, it must expose a certain range of storage materials, and this exposure range often exceeds the range of materials required for information storage. A lot of photosensitive molecules are wasted. [0003] figure 1 shows the exposure loss of the optical recording material in the disc caused by the traditional coaxial holographic storage system when recording, figure 1 (a) is the distribution range of the signal light, where the width of the narrowest part of the signal light distribution is the width achieved after filtering by the optical conjugate at the front end, usually this width will fall ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/0065G11B7/26
CPCG11B7/0065G11B7/26
Inventor 孙庆成余业纬
Owner 青岛泰谷光电工程技术有限公司
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