Patent ID: 7372784
Filing Date: 2008-05-13
Classification: G11B

Abstract:
1. An optical head apparatus comprising: a light source; a lens holder for retaining objective lens that converges emitted light emitted from said light source on optical recording medium; a lens drive apparatus for driving said lens holder in the tracking direction at the least; and a photo detector for receiving reflected light from said optical recording medium; wherein said lens holder is provided with a tube-shaped body section and an objective lens attachment section to which the objective lens is attached, and wherein the objective lens attachment section of said lens holder includes a light-blocking section spread out on both sides of the tracking direction so as to be capable of blocking nonessential light from the said light source proceeding toward said optical recording medium by passing outside the effective diameter of said objective lens, and the light-blocking face is formed as a slanted face on a face of the objective lens attachment section on an opposite side to the objective lens.