JPS6040033U

JPS6040033U - optical head

Info

Publication number: JPS6040033U
Application number: JP13155783U
Authority: JP
Inventors: 和男野田
Original assignee: フォスタ−電機株式会社
Priority date: 1983-08-24
Filing date: 1983-08-24
Publication date: 1985-03-20

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の光学ヘッドの一例を示す構成図、第２図
はフォーカシング制御信号及びトラッキング制御信号の
取り出し方を示す説明図、第３図は本考案の一実施例の
光学系を示す構成図、第４図は第３図の主要部の具体例
を示す平面図、第５図は第４図のＡＡ断面図、第６図は
第４図のＢＢ断面の主要部を示す断面図、第７図は第４
図中のホルダーを示す斜視図である。１・・・半導体レーザ、２・・・ハーフプリズム、３・
・・コリメータレンズ、４・・・対物レンズ、５・・・
ディスク、６・・・シリンドリカルレンズ、７・・・フ
ォトダイオード、１０・・・ホルダー、１１・・・ガイ
ド部材、１２・・・ミラー、１３・・・連結部材、１５
・・・フォーカシング用コイル、１６．２１〜２４．２
７・・・マグネット、１７，１８．２８．２９・・・ヨ
ーク、１９゜２０・・・トラッキング用コイル、２５，
２６，３１．３２・・・ガイドシャフト、３０・・・ラ
ジアル送り用コイル、３３．３４・・・軸受部材。〆一）／− 厄６図FIG. 1 is a configuration diagram showing an example of a conventional optical head, FIG. 2 is an explanatory diagram showing how to extract a focusing control signal and a tracking control signal, and FIG. 3 is a configuration diagram showing an optical system according to an embodiment of the present invention. Figure 4 is a plan view showing a specific example of the main part in Fig. 3, Fig. 5 is a sectional view taken along line AA in Fig. 4, and Fig. 6 is a sectional view showing the main part in section BB in Fig. 4. Figure 7 is the 4th
It is a perspective view which shows the holder in a figure. 1... Semiconductor laser, 2... Half prism, 3...
...Collimator lens, 4...Objective lens, 5...
Disc, 6... Cylindrical lens, 7... Photodiode, 10... Holder, 11... Guide member, 12... Mirror, 13... Connection member, 15
...Focusing coil, 16.21-24.2
7...Magnet, 17,18.28.29...Yoke, 19°20...Tracking coil, 25,
26, 31.32...Guide shaft, 30...Radial feeding coil, 33.34...Bearing member. 〆1) /- Illustration of misfortune 6

Claims

[Scope of utility model registration request]

(1) A guide member having a guide hole in the focusing direction, a holder that is slidably disposed within the guide hole of the guide member while holding an objective lens, and a holder that is integrated with the guide member during tracking. a mirror that moves in the tracking direction and changes the optical path between the optical path in the tracking direction and the optical path in the focusing direction; a first support means that supports the guide member slidably in the tracking direction; and a radial feeder. a second support means for slidably supporting the moved part; a focusing drive means for driving the holder; a tracking drive means for driving the guide member; An optical head comprising a feeding drive means for feeding the optical head.

(2) The optical head according to claim 1, wherein a single driving means is used as the tracking driving means and the feeding driving means, which functions as both driving means. , (3) The optical head according to claim 2, wherein the first and second support means are support means that also serve as both support means.