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AssigneeSamsung Electronics Co., Ltd.
InventorsChong-sam Chung, Young-man Ahn, Tae-kyung Kim, Hea-jung Suh, Jong-bae Kim
Estimating the term…
A spherical aberration compensator for compensating for spherical aberration resulting from a thickness deviation of a recording medium. The spherical aberration compensator includes a central compensation which provides a phase distribution that is effective for compensating for spherical aberration resulting from the thickness deviation and a peripheral compensation portion which surrounds the central compensation portion and provides a phase distribution that is effective for reducing a worsening of the spherical aberration caused by axial displacement of an objective lens from the central compensation portion. The spherical aberration compensator effectively relieves an optical pickup having an objective lens of an NA of 0.7 or greater of worsening of the spherical aberration resulting from thickness deviation of the recording medium.
A spherical aberration compensator for compensating for spherical aberration occurring in an optical pickup having an objective lens operative to focus light transmitted from a light source onto a recording medium along a first optical axis, the spherical aberration compensator comprising:
An optical pickup comprising:
A method of compensating for spherical aberration of a light in an optical pickup having at least a light source and an objective lens, the method comprising:
Dependencies are inferred from the claim text.