Object lens system and optical pick-up apparatus

Abstract

Disclosed herein is an object lens system, which miniaturizes the size of an optical pick-up apparatus while preventing influence resulting from a variation in the wavelength of a blue laser light irradiated onto an optical disc using optical parts with practical sizes, without miniaturizing the optical parts of the object lens system. The object lens system is arranged to face an optical disc, collect a light and irradiate the light onto the optical disc, and includes a direction changing means and a solid lens. The direction changing means changes a moving direction of an incident light to an orthogonal direction thereof, irradiates it onto the optical disc, and is provided with a hologram on one side surface thereof. The solid lens is disposed in front of the incident surface of the direction changing means.

Dependencies are inferred from the claim text.