METHOD FOR FITTING OBJECTIVE LENS TO OPTICAL PICKUP, OPTICAL PICKUP MOUNTED WITH OBJECTIVE LENS AND OBJECTIVE LENS TO OPTICAL PICKUP

摘要

PURPOSE:To remedy the fall of the light axis of an objective lens and position the objective lens simply and without fail by placing the positioning reference part of the objective lens in contact with a reference plane, and sliding the sliding curved surface of the objective lens in respect to a supporting part provided at a lens holder. CONSTITUTION:A bottom 30a of an objective lens 30 is the sliding curved surface, and the sliding curved surface 30a is slidably set in respect to an angle part A of a level difference 16 which is the supporting part in a lens holder 14. At the edge part of a top 30b of the objective lens 30, a plane positioning reference part 31 is formed, and the positioning reference part 31 is formed so as to conform to an imaginary plane orthogonal to a light axis 0-0 of the objective lens 30. Thus, the positioning reference part 31 can form a circumference on the beam emitting side of the lens with polishing, etc., its manufacture is easy, and the objective lens 30 can be correctly positioned with respect to the lens holder 14.