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Optical combination device for reading/writing digital color multi-layer n-order CD

An optical device and color technology, applied in the direction of beam guiding device, recording/reproducing by optical method, beam source, etc., can solve the problems of difficulty in reading and writing speed, storage capacity, storage dimension, etc.

Inactive Publication Date: 2003-04-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. DVD disc data is serially written and read by a single beam, and its reading and writing speed is difficult to improve
[0004] 2. At present, because each recording layer of the disc uses different transmittance and reflection ratios, the recording layer can only be two layers, so it is difficult to increase the storage dimension
Its storage capacity is also difficult to increase

Method used

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  • Optical combination device for reading/writing digital color multi-layer n-order CD
  • Optical combination device for reading/writing digital color multi-layer n-order CD
  • Optical combination device for reading/writing digital color multi-layer n-order CD

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Experimental program
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Embodiment Construction

[0015] Read and write principle and embodiment of the present invention in detail below in conjunction with accompanying drawing:

[0016] figure 1 one Figure 5 Among them, 1 is a laser, 2 is a collimating lens, 3 is a polarization beam splitter, 4 is a 1 / 4 wave plate, 5 is an achromatic objective lens, 6 is a disc, 7 is an imaging lens, 8 is a detector, 9 is a multi-wavelength Spectroscopic detector, 10 is a color multi-layer multi-stage optical disc, 12 is a light combiner, 14 is a light combination prism, 15 is an isosceles right-angle prism 1, 16 is an isosceles right-angle prism 2, 17 is a quadrilateral prism, 18 is an isosceles right-angle prism The rectangular prisms 3 and 19 are isosceles trapezoidal prisms.

[0017] Such as figure 2 As shown, the recording layer of the disc is composed of multi-color dielectric film, which are read and written by different wavelengths. pass figure 2 Explain the principle of reading and writing, the λi (i=1, 2,...n) wavelength ...

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Abstract

The present invention relates to a phot0-synthesizer device for reading and writing digital colour multi-layer and multi-order CD, including laser and phot-synthesizer, said photo-synthesizer is formed from collimating lens and phot-synthesizing prism, and said invented photo-synthesizer device is characterized by that the light emitted from laser is passed through the collimating lens, and sent out from another face of photo-synthesizing prism to form coaxial parallel beams, and these multi-wavelength coaxial parallel beams are used for reading and writing colour multi-layer multi-order CD. Said invention implements multi-beam surface coupling, and provides effective light source for high-speed reading and writing colour digital multi-layer multi-order CD, and can greatly raise storage capacity of CD and signal reading and writing speed.

Description

technical field [0001] The invention relates to a light-combining device for reading and writing digital color multilayer and multi-stage optical disks, which belongs to the technical field of optical disk drive design, and in particular relates to the structural design of the optical head of color digital multilayer optical disks. Background technique [0002] The storage capacity of information data is required to be larger and the access speed is required to be faster and faster. At present, most of the ultra-large-capacity data access uses methods such as optical disk libraries, optical disk towers, and disk arrays. However, the data capacity of a single optical disc or magnetic disk is relatively small and the access speed is relatively slow. Increasing the storage dimension of a single disc is an effective way to increase the optical storage capacity. For example, four multi-layer storage methods are used in Digital Versatile Disc-DVD, namely, single-sided single-laye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/0045G11B7/005G11B7/1372
Inventor 徐端颐齐国生巩马理阎平廖宁放
Owner TSINGHUA UNIV
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