Optical head device
A technology of optical head and laser, which is applied in the direction of optical recording head, configuration/installation of head, light beam source, etc., can solve the problems such as the influence of optical characteristics of optical head device 101, the misalignment of fixed position, etc., and achieve the effect of shortening the adjustment process and suppressing the temperature rise
Inactive Publication Date: 2007-09-12
SANKYO SEIKI MFG CO LTD
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Problems solved by technology
That is, the problem of the influence on the optical characteristics of the optical head device 101 becomes more and more obvious due to the temperature rise of the frame 105, etc., where the fixed positions of the optical elements constituting the optical system are displaced.
Method used
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Embodiment Construction
[0047] The best mode for carrying out the present invention will be described below with reference to the drawings.
[0048] (The overall configuration of the optical head device)
[0049] FIG. 1 is a perspective view showing the overall configuration of an optical head device in Embodiment 1 of the present invention. FIG. 2 is a schematic configuration diagram showing an optical system configuration of the optical head device shown in FIG. 1 . Fig. 3 is a bottom view showing the bottom side of the optical head device shown in Fig. 1 . In FIG. 3 , for convenience of description, the bottom surface of the optical head device is shown in a state where the bottom cover, which is a member of the optical head device, is removed.
[0050] The optical head device 1 in this example is a device for recording and reproducing information on an optical disc 30 such as a CD or DVD, and has a frame 15 on which an optical system 31 and the like described below are mounted. The frame 15 is...
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An optical head device includes a heat-radiating body for radiating heat generated in the laser beam emitting element which is disposed so as to have a gap space with respect to the laser beam emitting element and a heat-conductive member which is filled in the gap space between the laser beam emitting element and the heat-radiating body. The heat-conductive member is a gel-like heat-conductive member having a heat transmission property or a heat-conductive member having a heat transmission property and elasticity. Another optical head device includes an optical system including a laser driver for driving the laser beam emitting element, a frame on which the optical system is mounted, a cover which is fixed to the frame for protecting at least a part of the optical system and a heat-radiating body which is formed in a separated manner from the cover for radiating heat generated in the laser driver.
Description
technical field [0001] The present invention relates to an optical head device used for recording and reproducing optical discs such as CDs and DVDs. More specifically, it relates to a heat dissipation structure of a laser light emitting element having an optical head device, and a heat dissipation structure of a laser driver for driving a laser light emitting element having an optical head device. Background technique [0002] An optical head device used for recording and reproducing optical discs such as CDs or DVDs, has: a laser light emitting element as a light source; an objective lens for focusing laser light emitted from the laser light emitting element on the optical disc; and a light receiving element for receiving return light from the optical disc; Frames for fixing optical systems such as laser light emitting devices, etc. [0003] In such an optical head device, as a laser light emitting element, a high output laser light emitting element for performing recordi...
Claims
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IPC IPC(8): G11B7/12G11B33/14G11B7/08G11B7/125
Inventor 窪田浩月冈靖幸
Owner SANKYO SEIKI MFG CO LTD