JPS63153326U

JPS63153326U -

Info

Publication number: JPS63153326U
Application number: JP4540687U
Authority: JP
Priority date: 1987-03-27
Filing date: 1987-03-27
Publication date: 1988-10-07

Description

[Brief explanation of drawings]

第１図はこの考案の第一の実施例を示す概略正
面図、第２図はその概略側面図、第３図はこの考
案の第二の実施例を示す概略正面図、第４図はそ
の概略側面図、第５図は集積光検知素子の平面図
、第６図はその正面図、第７図は回折効率分布特
性図、第８図は偏光面回転状態を示す原理説明図
、第９図は出力電圧特性の線図、第１０図はこの
考案の第三の実施例を示す概略正面図、第１１図
は従来例を示す光ピツクアツプの概略側面図であ
る。２０……光磁気デイスク、２０ｂ……情報記録
面、２１……レーザ光源、２１ａ……半導体レー
ザ、２１ｃ……ピンホール、２２……磁気コイル
（磁気手段）、２３……コリメートレンズ（コリ
メート光学系）、２４……反射プリズム（反射光
学系）、２５……アクチユエータ、２６……移動
光学系、２７……検出光学系、３７……アクチユ
エータ、３８……薄膜磁気ヘツド（磁気手段）、
３９……マイクロフレネルレンズ（コリメート光
学系）、４０……移動光学系、４１……検出光学
系、５５……検出光学系。 Fig. 1 is a schematic front view showing a first embodiment of this invention, Fig. 2 is a schematic side view thereof, Fig. 3 is a schematic front view showing a second embodiment of this invention, and Fig. 4 is a schematic front view thereof. A schematic side view, FIG. 5 is a plan view of the integrated photodetecting element, FIG. 6 is a front view thereof, FIG. 7 is a diffraction efficiency distribution characteristic diagram, FIG. 8 is a principle explanatory diagram showing the polarization plane rotation state, and FIG. 9 10 is a schematic front view showing a third embodiment of the invention, and FIG. 11 is a schematic side view of an optical pickup showing a conventional example. 20... magneto-optical disk, 20b... information recording surface, 21... laser light source, 21a... semiconductor laser, 21c... pinhole, 22... magnetic coil (magnetic means), 23... collimating lens (collimating optical system), 24... Reflection prism (reflection optical system), 25... Actuator, 26... Moving optical system, 27... Detection optical system, 37... Actuator, 38... Thin film magnetic head (magnetic means),
39... Micro Fresnel lens (collimating optical system), 40... Moving optical system, 41... Detection optical system, 55... Detection optical system.

Claims

[Scope of utility model registration request]

A laser light source including a semiconductor laser that is close to the information recording surface of a magneto-optical disk and irradiates the information recording surface with a laser beam focused directly onto the information recording surface, and a magnetic means that applies a magnetic field to the information recording surface. A collimating optical system that converts transmitted light from the information recording surface irradiated by the laser light source into a parallel beam, and a reflecting optical system that reflects the parallel beam are interlocked by an actuator to direct the magneto-optical disk to the magneto-optical disk. What is claimed is: 1. A magneto-optical information recording and reproducing apparatus, characterized in that a moving optical system is formed to relatively move the optical system, and a detection optical system that receives a reflected beam from the reflective optical system is fixedly arranged.