Optical element, optical pick-up device and manufacturing method of the optical element

摘要

An optical element for recording and/or reproducing information of an optical information recording medium, includes an optical element body having an incident surface and an opposite surface opposite to the incident surface, A light flux coming from a light source at an outside is introduced to be incident into an inside of the optical element body and is reflected several times in the inside of on the opposite surface; and the incident surface is a referactive surface is convex toward the light source side and the light source side