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Laser head device

A technology of laser head and lens driving device, applied in beam guiding device, optical recording head, configuration/installation of head, etc., can solve the problems of prism tilt and verticality drop, etc.

Inactive Publication Date: 2004-09-15
SANKYO SEIKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem with the resin frame 3 of this structure is that the resin in the thick part expands and contracts violently compared with other parts, so the prism mounting part 330 that is thickened on the frame side wall 331 changes with temperature. The frame side wall 331 that the prism 22 abuts on will be deformed such as a drop in verticality, causing the prism to tilt

Method used

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  • Laser head device
  • Laser head device
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Experimental program
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Embodiment Construction

[0016] Embodiment of the invention

[0017] Next, referring to the drawings, a laser head device to which the present invention is applied will be described.

[0018] figure 1 It is a plan view of important parts of the laser device for recording and reproducing CD, CD-R and DVD. figure 2 (A), (B), (C), (D) are respectively figure 1 Plan view, left side view, right side view, and bottom view of the laser head assembly shown. image 3 (A), (B), (C), (D) are respectively figure 1 The plan view, left side view, right side view and bottom view of the resin frame for the laser head unit shown.

[0019] Such as figure 1 , figure 2 and image 3 As shown, the laser head device 1 is provided with a frame 3 made of resin. The frame 3 can move along the guide shafts 2A, 2B through the connecting parts 301, 302, 303 through the two guide shafts 2A, 2B installed parallel to each other relative to the machine. An optical system as described below is provided on the guide shaf...

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PUM

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Abstract

To provide the constitution of an optical head device in which deficiencies such as positional deviation and posture inclination of optical parts mounted on a frame made of resin do not occur even if temperature change occurs for the frame. In the frame 3 made of resin used for the optical head device 1, local expansion, shrinkage or the like do not occur even when temperature change occurs for the frame 3, since any of the inner side 335 of the frame sidewall 331 of a prism mounting part and a cylindrical projecting part 370 to which a holder supporting member is adhered and fixed is made uniform by holes 51 and 52.

Description

technical field [0001] The present invention relates to a laser head device for recording and reproducing optical recording media such as CD (Compact Disk) and DVD (Digital Video Disk). More specifically, it relates to the frame structure for mounting optical components in the laser head unit. Background technique [0002] The laser head device used for recording and reproducing optical recording media such as CD and DVD is to guide the light emitted by the light source into the objective lens through the light guide system, and converge the light converged by the objective lens to the optical recording medium. At this time, the objective lens is driven in the tracking direction and the focusing direction by the lens driving device. Regarding the returned light from the optical recording medium, it is still guided into the photosensitive device through the light guiding system. Here, various optical components constituting the light guide system, together with the light so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/08G11B7/09G11B7/12G11B7/135
Inventor 洼田浩土井修花冈淳裕
Owner SANKYO SEIKI MFG CO LTD