JPH0445320U

JPH0445320U -

Info

Publication number: JPH0445320U
Application number: JP8273290U
Authority: JP
Priority date: 1990-08-06
Filing date: 1990-08-06
Publication date: 1992-04-17

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例によるヘツド装置の
光学系レイアウト構造の斜視図、第２図は従来の
ヘツド装置の光学系レイアウト構造の斜視図であ
る。１……レーザダイオード、２……コリメートレ
ンズ、３……ビーム整形プリズム、４……ビーム
スプリツトプリズム、５……反射プリズム、６…
…対物レンズ、７……光磁気デイスク、８……反
射プリズム、９……集光レンズ、１０……検光子
、１１……フオトダイオード、１２……1/2波長
板。 FIG. 1 is a perspective view of the optical system layout structure of a head device according to an embodiment of the present invention, and FIG. 2 is a perspective view of the optical system layout structure of a conventional head device. 1... Laser diode, 2... Collimating lens, 3... Beam shaping prism, 4... Beam splitting prism, 5... Reflecting prism, 6...
...Objective lens, 7...Magneto-optical disk, 8...Reflection prism, 9...Condensing lens, 10...Analyzer, 11...Photodiode, 12...1/2 wavelength plate.

Claims

[Claims for Utility Model Registration] The optical axis is arranged approximately in the radial direction of the disk, and the collimating lens and beam shaping prism for shaping the beam from the laser diode and the polarization axis are arranged at 90°.
a light source system including a 1/2 wavelength plate rotated by 1/2 degree, a beam splitting prism that bends the beam from the light source system in a direction substantially tangent to the track of the disk, and a beam splitting prism that bends the beam bent by the beam splitting prism to a reflecting prism that is bent in a direction perpendicular to the disk; an objective lens that irradiates the disk with a beam from the reflecting prism and collects the reflected light from the disk and returns it to the reflecting prism; , further comprising: a second reflecting prism that bends the reflected beam from the disk that has passed straight through the beam splitting prism in a substantially radial direction of the disk; and a condenser lens and an analyzer for directing the reflected beam from the second reflecting prism. A head device for a magneto-optical recording device, comprising: a light-receiving system for detecting light with a light-receiving element via a light-receiving element;