Patent ID: 8064320
Filing Date: 2011-11-22
Classification: G11B

Abstract:
1. An optical pickup that records and/or reproduces information by irradiating a plurality of types of optical discs selectively with a plurality of optical beams with different wavelengths, the optical pickup comprising: a laser source that emits the plurality of optical beams with the different wavelengths; first and second objective lenses having different specifications and arranged so that optical axes thereof are substantially parallel to each other; a first raising optical element that reflects an optical beam from a first direction within a plane substantially orthogonal to the optical axis of the first objective lens, to cause the reflected optical beam to be incident on the first objective lens; and a second raising optical element that reflects an optical beam from a second direction at an acute angle to the first direction, the acute angle being formed between the first and second directions on a side of the second raising optical element corresponding to a bending mirror that reflects an optical beam toward the second raising optical element along the second direction, the acute angle being within a plane substantially orthogonal to the optical axis of the second objective lens, to cause the reflected optical beam to be incident on the second objective lens, wherein at least one lateral surface of at least one of the first and second raising optical elements is formed at an angle of 90 degrees or smaller to a reflection surface thereof, and wherein the lateral surface of the one of the first and second raising optical elements is arranged to face a lateral surface of the other of the first and second raising optical elements.