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Optical read/write system

An optical reading and optical disc technology, applied in optical recording systems, optical recording/reproducing, optical recording heads, etc., can solve problems such as spherical aberration and chromatic aberration, and achieve the effect of reducing the number, simplifying the optical path, and achieving good optical performance.

Inactive Publication Date: 2006-01-18
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shared collimator lens and objective lens can only be set for one of the specifications. If it is set for HD-DVD specifications, spherical aberration and chromatic aberration will appear in the optical paths of DVD and CD specifications.

Method used

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Embodiment Construction

[0012] Please refer to FIG. 1 , which is a schematic diagram of an optical read / write system 100 of the present invention. The optical read / write system 100 of the present invention is applicable to recording / reproducing devices for recording / reproducing different optical disc specifications. This embodiment is described by taking the optical read / write system applicable to HD-DVD recording / reproducing devices as an example. Optical read / write system 100 comprises a first optical transceiver unit 11, a second optical transceiver unit 12, a third optical transceiver unit 13, a first diffraction element 21, a second diffraction element 22, a third diffraction element 23. A prism unit 3 , a collimating lens 4 , a mirror 5 , a wavelength selective mirror 6 and an objective lens 7 . Among them, the first optical transceiver unit 11, the second optical transceiver unit 12, the third optical transceiver unit 13, the first diffraction element 21, the second diffraction element 22, the...

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Abstract

The invention relates to an optical read-write system, which can record / inactivates first, second and third disk size signal. The storage density of the disk size in turn reduces; the optical read-write system comprises a first, second and third light source which can emit first, second and third incident beam of first, second and third wavelength, a prism unit, a collimation lens and an object lens, wherein second wavelength is longer than first wavelength; third wavelength is longer than second wavelength; the prism unit comprises a first incident light side, an aspheric surface structure inputted to second incident light side of third incident beam and an outlet light side of first, second and third incident beam on the same place, wherein first incident light side comprises first and second incident light area which are separately opposed with first and second light transmitting-receiving unit; second incident light area is aspheric surface structure; the collimation lens is on the light path of one outlet light side of prism lens and has the matched optical parameter of first disk size with the object lens.

Description

【Technical field】 [0001] The present invention relates to an optical read / write system for a recording / reproducing device, especially an optical read / write system compatible with different optical disc specifications. 【Background technique】 [0002] Disc Specifications cd DVD HD-DVD wavelength 780nm 650nm 405nm Numerical aperture (NA) 0.45 0.6 0.65 or 0.8 [0003] Due to the different optical parameters of different optical disc specifications, the compatibility problem of each specification becomes prominent. To read / write optical disc information of specific specifications, it is necessary to use optical components that meet the specifications of the optical disc, otherwise, the read / write performance will be reduced. However, it is obviously unwise to design a corresponding optical read / write system for each specification in order to realize the read / write operations on optical disks of various specifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/135G11B7/125G11B7/0045G11B7/005
Inventor 孙文信
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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