The invention presents an optical element with which an optical head can be configured, in which there is {HEAD ~ little deterioration} of {TAIL ~ the correctional effect} when the objective lens shifts, as well as an optical head and an optical recording/reproducing apparatus using such an optical element 
of
The invention presents an optical element with which an optical head can be configured , in which there is { HEAD ~ little deterioration } of { TAIL ~ the correctional effect } when the objective lens shifts , as well as an optical head and an optical recording / reproducing apparatus using such an optical element
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