OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE

摘要

A polarizing beam splitter (21) is secured in a state wherein a bottom plate (2102) thereof contacts closely with an upper face of a substrate (16) and a light receiving element (23) without a gap left therebetween. A quarter-wave plate (17) is attached to the polarizing beam splitter in a state wherein a lower face (1702) thereof contacts closely with an upper face (2104) without a gap left therebetween such that the lengthwise directions and the widthwise directions of them coincide with each other. An objective lens plate (18) is attached in a state wherein a lower face (1806) thereof contacts closely with an upper face (1704) of the quarter-wave plate without a gap left therebetween. A light source (22) is bonded at a mount member (22B) thereof to the upper face of the substrate by means of a bonding agent or the like such that an emitting face of a semiconductor laser (22A) and a front face of the mount member contact closely with a portion of a side face (2106) of the polarizing beam splitter without a gap left therebetween.