GROUP LENS, GROUP LENS ASSEMBLY ADJUSTING METHOD, GROUP LENS ASSEMBLY ADJUSTING DEVICE, AND OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a lens assembly adjusting method for assembling group lenses having good aberration performance with high accuracy, a lens assembly device, a group lens, and an optical information recording and reproducing device.

SOLUTION: The group lens adjusting device having a means for detecting the aberration components possessed by the group lens by receiving the light past through the group lens consisting of a plurality of lenses and a driving means capable of discretely controlling the plurality of the lenses, controls the position of the plurality of lenses by the driving means in such a manner that the magnitude of the abaxial aberrations in at least one component of the aberration components is made asymmetrical with the optical axes of the group lens.

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