| 摘要 |
A wavefront measuring apparatus for optical pickup includes: a beam splitting section; a wavefront shaping section; a beam combining section that generate interference light; an interference fringe image-acquiring section that acquires an interference fringe image including wavefront information of the light beam; and an analyzing section that analyzes a wavefront of the light beam on the basis of the interference fringe image. The analyzing section includes: an image processing section that performs a filtering process on the interference fringe image to eliminate a frequency component corresponding to the sub beam, so as to acquire the filtering-processed interference fringe image, and a wavefront analyzing section that analyzes a wavefront of the main beam on the basis of the filtering-processed interference fringe image.
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