OBJECTIVE LENS INCLINATION-INSPECTING DEVICE, METHOD FOR MANUFACTURING OPTICAL DISK PICK-UP, AND OPTICAL DISK PICK- UP MANUFACTURED BY MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To adjust focus and at the same time detect the change in the position of a light beam due to the move of an objective lens when adjusting the inclination of the objective lens. ;SOLUTION: When the inclination of an objective lens 3 of an optical disk pick-up is to be detected, a light beam that is branched from that advancing toward an enlargement observation system 5 is received and its beam position is detected by a beam position detection system 30. Then, a light beam being branched from the enlargement observation system 5 is received and its amount of defocus is detected by a focus detection system 34.;COPYRIGHT: (C)2000,JPO