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Optical module set and optical recording/reproducing device using same

An optical module and reproducing device technology, which is applied in the direction of recording/reproducing by optical methods, optical recording heads, beam guiding devices, etc., can solve the problems of increasing the cost of optical recording/reproducing devices, and achieve reduction in volume and cost. Effect

Inactive Publication Date: 2007-03-07
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this greatly increases the cost of the entire optical recording / reproducing device

Method used

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  • Optical module set and optical recording/reproducing device using same
  • Optical module set and optical recording/reproducing device using same
  • Optical module set and optical recording/reproducing device using same

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[0021] As shown in FIG. 4 and FIG. 5 , an optical module 10 disclosed in a preferred embodiment of the present invention includes: a laser 12 , a beam shaping element 13 and a collimator lens 18 . The laser 12 , the beam shaping element 13 and the collimator lens 18 are located on the same optical axis and arranged in sequence along the optical path. The laser 12 is a side-emitting laser that emits an elliptical beam 121 , and the laser 12 is located at the focal point of the collimating lens 18 . The beam shaping element 13 includes a first optical element 14 and a second optical element 16 , the first optical element 14 is located between the laser 12 and the second optical element 16 .

[0022] Referring to FIG. 6 , the first optical element 14 is a cylindrical mirror structure, and its mirror axis 141 is parallel to the long axis of the elliptical light beam 121 . The first optical element 14 has two opposite surfaces, wherein the surface close to the laser 12 is a first ...

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Abstract

This invention relates to optical mode set and the optical record and rendition device, which comprises one light source and one beam shaping element, wherein, the light source is to send one ellipse beam with one first diffraction surface and one second diffraction surface and the first diffraction surface is located between light source and second diffraction surface; the said diffraction surface can extend the said ellipse beam to make its short axis shorter than its long axis; the said second diffraction surface contracts short axis to make the two axis equal to convert the beam into one round beam.

Description

【Technical field】 [0001] The invention relates to an optical module and an optical recording / reproducing device using the optical module. 【Background technique】 [0002] As a storage medium, optical discs are widely used in various fields, and with the development of the information industry, the storage capacity of optical discs is also increasing continuously, and the storage density is also increased accordingly. As a device for recording information on or reproducing stored information from an optical disc, an optical recording / reproducing device relies on an optical system to converge light beams onto the optical disc so that the light beam is modulated by the information stored on the optical disc. Subsequently, relying on the optical system, the information carried by the light beam is transmitted to the detection element and converted into an electrical signal for output. Finally, the recording / reproducing operation of the optical disc can be realized through subsequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/12G11B7/135G02B5/00
CPCG11B7/1376G02B3/08G02B27/0037
Inventor 孙文信
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD