JPS63109331U

JPS63109331U -

Info

Publication number: JPS63109331U
Application number: JP168587U
Authority: JP
Priority date: 1987-01-09
Filing date: 1987-01-09
Publication date: 1988-07-14

Description

[Brief explanation of drawings]

第１図は本考案の第一実施例による光ピツクア
ツプの光学装置を示す素子の配置図、第２図はそ
の発光部材内の構造を示す透視図、第３図は第二
実施例を示す発光部材内の透視図、第４図は発光
部材の構造を示す透視斜視図、第５図は従来の光
ピツクアツプの光学装置を示す素子の配置図であ
る。１……発光部材、２……半導体レーザのチツプ
、３……サブマウント、３ｂ……光路側の端面、
４……回折格子、５……半透過反射部材、６……
コリメートレンズ、８……対物レンズ、９……受
光部材、Ｄ……光デイスク。 Fig. 1 is a layout diagram of elements showing an optical device of an optical pickup according to a first embodiment of the present invention, Fig. 2 is a perspective view showing the structure inside the light emitting member, and Fig. 3 is a light emitting diagram showing a second embodiment of the invention. FIG. 4 is a perspective view of the inside of the member, FIG. 4 is a perspective view showing the structure of the light emitting member, and FIG. 5 is a layout diagram of elements showing an optical device of a conventional optical pickup. DESCRIPTION OF SYMBOLS 1... Light emitting member, 2... Semiconductor laser chip, 3... Submount, 3b... End surface on the optical path side,
4... Diffraction grating, 5... Transflective member, 6...
Collimator lens, 8... Objective lens, 9... Light receiving member, D... Optical disk.

Claims

[Claims for Utility Model Registration] (1) A light-emitting member having a semiconductor laser chip installed on a submount, an objective lens facing the recording surface of an optical disk, and a space between the light-emitting member and the objective lens. a transflective member positioned and arranged obliquely with respect to the optical axis; a light receiving member positioned in the direction of reflection by the transflective member;
In an optical pickup optical device that is provided with a diffraction grating that forms three spots on the recording surface of an optical disk by the output beam of a light emitting member, the end surface of the submount on the optical path side is arranged on the recording surface of the optical disk. What is claimed is: 1. An optical device for an optical pickup, characterized in that the optical device is formed at a position opposite to the optical path of the base so that the reflected beam from the formed spot is not reflected. (2) The optical device for an optical pickup according to claim 1, wherein the end surface of the submount on the optical path side is formed obliquely with respect to the optical axis connecting the light emitting member and the objective lens. (3) The optical path-side end surface of the submount is formed to be shifted from the focal position of the reflected beam from the spot formed on the recording surface of the optical disk. Pick-up optical device.