Optical detector e.g. for DVD or CD, has half mirror with end section for mounting against inclined lateral surface and inclined end surface of retention seat

摘要

An optical detector has a retention seat with an inclined lateral surface and an inclined end surface, a positioning seat having an inclined lateral surface which is aligned with the inclined lateral surface of the retention seat, a half mirror with which an end section is provided against the inclined lateral surface and inclined end surface of the retention seat, a pocket formed in the floor surface of the slot section, a floor of the pocket is closed by a positioning base which is provided on the floor surface of the slot section such that it abuts against the rear surface of the half mirror.