JPS59157225U

JPS59157225U - optical head

Info

Publication number: JPS59157225U
Application number: JP5116483U
Authority: JP
Inventors: 義治田中
Original assignee: 萬世工業株式会社
Priority date: 1983-04-06
Filing date: 1983-04-06
Publication date: 1984-10-22

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図は光学系の一実施例を示す説明図、第２図は本考
案の光学ヘッドの一実施例を示す一部断面上面図、第３
図は同実施例の要部の作動状態を示す一部断面上面図、
第４図は同実施例の保持筒の斜視図を示す。１・・・・・・光源、２・・・・・・光ビーム、４・・
・・・・偏向器、７・・・・・・情報ディスク、１０・
・・・・・光検出素子、１１・・・レンズ、１２・・・
・・・照射スポット、１３・・・・・・枠体、１６・・
・・・・案内孔、１７・・・・・・保持筒、２１・・・
・・・開口。FIG. 1 is an explanatory diagram showing one embodiment of the optical system, FIG. 2 is a partially sectional top view showing one embodiment of the optical head of the present invention, and FIG.
The figure is a partial cross-sectional top view showing the operating state of the main parts of the same embodiment.
FIG. 4 shows a perspective view of the holding cylinder of the same embodiment. 1...Light source, 2...Light beam, 4...
... Deflector, 7 ... Information disk, 10.
...Photodetection element, 11...Lens, 12...
...Irradiation spot, 13... Frame body, 16...
...Guide hole, 17...Holding tube, 21...
...opening.

Claims

[Scope of utility model registration request]

An optical system that guides a light beam from a light source to an information disk and a photodetection element is held in a cylinder, and is fixed to a holding hole formed in the cylinder or frame, and the optical system is configured to detect the light beam. A guide hole is provided perpendicular to the optical axis of the optical system in the fixed part of the frame of the deflector that deflects in the direction of the element, the photodetecting element is fixed to the opening of this guide hole, and a light beam is inserted into the guide hole. An optical head is provided with a sliding holding cylinder for a lens that focuses light onto a photodetecting element, and an opening is provided in the frame so that the holding cylinder can be operated from outside the frame.