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Optical pickup device

An optical pickup device and beam technology, which are applied to beam guiding devices, optical recording heads, recording/reproducing by optical methods, etc., can solve the problems of increased manufacturing cost and complicated manufacturing process, and achieve the effect of low cost

Inactive Publication Date: 2006-05-31
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The hologram element 13 is used as a device for correcting the light path by using the light refraction phenomenon, and is manufactured through an etching process, which is relatively complicated and the manufacturing cost is correspondingly increased.

Method used

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  • Optical pickup device
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Embodiment Construction

[0032] if refer to Figure 4 In other words, the composition of the present invention includes the following devices: a laser diode 110 that emits a beam of 2 wavelengths; a beam splitter 160 that passes or reflects the incident light according to the polarization direction of the incident light; The optical axis correction prism 112 aligns the path of the beam emitted from the laser diode 110 .

[0033] At the same time, a 3-beam grating 115 for generation servo is selectively provided between the laser diode 110 and the beam splitter 160 .

[0034] In addition, the collimator lens (Collimator lens) 130 for making the light parallel to a certain direction; the objective lens 140 for concentrating the light beam to the correct point of the optical disc; the mirror 120; the optical disc 150; the cylindrical lens 170 for generating the boiling point; Optical detector Photo Detector) 180 of the light beam.

[0035] In addition, depending on the design of the optical pickup devi...

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Abstract

A light pick up device consists of laser diode for emitting light beam with two wavelengths, beamsplitter for penetrating or revere ¿C incoming light beam according to incoming light polarization direction, collimator for making light forward in parallel, objective lens for collecting said light beam on correct position of optical disc, light wave detector for correctly interpreting reverse light beam of optical disc, light axis additions and corrections prism set between laser diode and beam splitter for making path of two wavelengths be consistence.

Description

【Technical field】 [0001] The present invention relates to an invention of an optical pickup device, and more specifically, relates to an invention of an optical pickup device using a 2-wavelength laser diode. 【Background technique】 [0002] Products that record and reproduce information using the optical characteristics of optical discs are generally small disks. To use optical discs, an optical drive is required, and the information on the optical disc is reproduced or recorded by an optical pickup device installed in the optical disc drive. [0003] The main components of this optical pickup also include a laser diode (LD: Laser Diode) that generates light, a photodetector (PD: Photo Detector) that interprets the light beam reflected on the optical disc, and selectively reverses it according to the direction of light polarization. Or through the beam splitter (Beam Splitter). [0004] On the other hand, in order to combine light beams correctly on an optical disc, a devic...

Claims

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Application Information

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IPC IPC(8): G11B7/095G11B7/135G11B7/1395
Inventor 李京彦
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI