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 {HEAD ~ an optical head} and an optical recording/reproducing apparatus using {TAIL ~ such an optical element} 
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 { HEAD ~ an optical head } and 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL