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