JPS6424529U

JPS6424529U -

Info

Publication number: JPS6424529U
Application number: JP12053587U
Authority: JP
Priority date: 1987-08-05
Filing date: 1987-08-05
Publication date: 1989-02-09
Anticipated expiration: 2002-08-05
Also published as: JPH0749622Y2

Description

[Brief explanation of the drawing]

第１図は本案装置の略示外観図、第２図はその
模式的平面図、第３図は模式的側面図、第４図は
光学系の模式的立面図、第５図は動作説明図、第
６図は他の実施例を示す光学系の模式的立面図、
第７図は従来装置の模式的平面図である。１０……固定光学系、１２……ガルバノミラー
、１４……中空軸、１６ａ，１６ｂ……対物レン
ズ、１９……中空アーム、１９ａ，１９ｂ……開
口部、２１……コイル。なお、図中、同一符号は
同一、又は相当部分を示す。 Fig. 1 is a schematic external view of the proposed device, Fig. 2 is a schematic plan view thereof, Fig. 3 is a schematic side view, Fig. 4 is a schematic elevational view of the optical system, and Fig. 5 is an explanation of operation. 6 is a schematic elevational view of an optical system showing another embodiment,
FIG. 7 is a schematic plan view of a conventional device. DESCRIPTION OF SYMBOLS 10... Fixed optical system, 12... Galvanometer mirror, 14... Hollow shaft, 16a, 16b... Objective lens, 19... Hollow arm, 19a, 19b... Opening, 21... Coil. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

補正昭６３．３．２５実用新案登録請求の範囲を次のように補正する
。Amendment March 25, 1983 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】１光ビームを光デイスクに集光投射する光学装
置において、光デイスクと垂直な中空軸と、該軸
回りに回動し、光デイスクに臨む面に開口部を有
する中空アームと、固定された光源と、該光源か
ら発せられた光を前記中空軸内へ入射するガルバ
ノミラーと、該中空軸内へ入射された光を中空ア
ームへ入射し、前記開口部から光デイスクへ向け
て集光投射する光学手段とを具備することを特徴
とする光学装置。２中空軸回りに回動させる駆動力を、電磁力に
より得る構成とし、駆動源を回動軸に対してデイ
スクモータの反対側に設けたことを特徴とする実
用新案登録請求の範囲第１項記載の光学装置。３中空軸内へ入射した光を中空アームへ入射す
る様に反射する光学手段としてハーフミラー及び
ミラーを用い、前記ハーフミラー及びミラーで反
射された光線の成す角度が１８０゜でないことを
特徴とする実用新案登録請求の範囲第１項又は第
２項記載の光学装置。４中空軸内へ入射した光を、中空アームへ入射
する様に反射する光学手段としてミラーのみを用
い、前記ミラーを回転させることより各々の中空
アームへ選択的に光線を入射させる様に構成した
ことを特徴とする実用新案登録請求の範囲第１項
又は第２項記載の光学装置。５各々の中空アームへ入射させる光線の成す角
度が１８０゜でないことを特徴とする実用新案登
録請求の範囲第１項、第２項又は第４項記載の光
学装置。 [Claims for Utility Model Registration] 1. An optical device that condenses and projects a light beam onto an optical disk, which has a hollow shaft perpendicular to the optical disk and an opening on a surface that rotates around the axis and faces the optical disk. a hollow arm, a fixed light source, a galvanometer mirror that makes the light emitted from the light source enter the hollow shaft, and makes the light that has entered the hollow shaft enter the hollow arm, and makes the light from the opening. 1. An optical device comprising: an optical means for condensing and projecting light toward a disk. 2 Utility model registration claim 1, characterized in that the driving force for rotating around the hollow shaft is obtained by electromagnetic force, and the driving source is provided on the opposite side of the disk motor with respect to the rotating shaft. Optical device as described. 3. A half mirror and a mirror are used as optical means for reflecting the light incident on the hollow shaft so as to be incident on the hollow arm, and the angle formed by the light rays reflected by the half mirror and the mirror is not 180°. An optical device according to claim 1 or 2 of the utility model registration claim. 4 Only a mirror is used as an optical means for reflecting the light incident into the hollow shaft so that it is incident on the hollow arms, and by rotating the mirror, the light beam is configured to be selectively incident on each hollow arm. An optical device according to claim 1 or 2 of the utility model registration claim, characterized in that: 5. The optical device according to claim 1, 2, or 4, wherein the angle formed by the light rays incident on each hollow arm is not 180°.

Claims

[Scope of utility model registration request]

An optical device for condensing and projecting a light beam onto an optical disk includes a hollow shaft parallel to the optical disk, a hollow arm that rotates around the axis and has an opening on a surface facing the optical disk, and a fixed light source. , a galvanometer mirror that makes the light emitted from the light source enter the hollow shaft; and an optical system that makes the light that has entered the hollow shaft enter the hollow arm, and condenses and projects the light from the opening toward the optical disk. An optical device comprising: means.