JPS6321901U

JPS6321901U -

Info

Publication number: JPS6321901U
Application number: JP11644586U
Authority: JP
Priority date: 1986-07-29
Filing date: 1986-07-29
Publication date: 1988-02-13

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による光デイスク
ピツクアツプ装置を示す斜視図、第２図は従来の
光デイスクピツクアツプ装置を示す斜視図である
。図において、２はレーザ光源、３は対物レンズ
、４は光デイスク、６は４分割光センサ、１１は
円筒面の半透過面をもつプリズムハーフミラーで
ある。なお、図中、同一符号は同一、又は相当部
分を示す。 FIG. 1 is a perspective view showing an optical disk pickup device according to an embodiment of the invention, and FIG. 2 is a perspective view showing a conventional optical disk pickup device. In the figure, 2 is a laser light source, 3 is an objective lens, 4 is an optical disk, 6 is a 4-split optical sensor, and 11 is a prism half mirror having a semi-transparent cylindrical surface. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

補正昭６２．３．３実用新案登録請求の範囲を次のように補正する
。Amendment March 3, 1982 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】レーザ光源からのビームを、プリズムハーフミ
ラー、対物レンズを介してデイスク上に照射し、
前記デイスクからの反射ビームを前記対物レンズ
、プリズムハーフミラーを介して光センサに導く
ようにした光デイスクピツクアツプ装置において
、前記プリズムハーフミラーの半透過面を、母線
が上記対物レンズの光軸に対して直交する２次曲
面としたことを特徴とする光デイスクピツクアツ
プ装置。[Claims for Utility Model Registration] A beam from a laser light source is irradiated onto a disk via a prism half mirror and an objective lens,
In an optical disk pickup device that guides a reflected beam from the disk to an optical sensor via the objective lens and the prism half mirror, the semi-transparent surface of the prism half mirror is arranged such that the generatrix is relative to the optical axis of the objective lens. An optical disk pickup device characterized in that a quadratic curved surface is orthogonal to each other.

Claims

[Scope of utility model registration request]

A beam from a laser light source is irradiated onto the disk through a prism half mirror and an objective lens.
In an optical disk pickup device that guides a reflected beam from the disk to an optical sensor via the objective lens and the prism half mirror, the semi-transparent surface of the prism half mirror is arranged such that the generatrix is relative to the optical axis of the objective lens. An optical disk pickup device characterized by having a quadratic curved surface that is orthogonal to each other.