The surface side reproduction type optical recording medium 4, wherein {HEAD ~ the refractive index} of the dielectric layer decreases stepwisely or continuously toward {TAIL ~ the medium surface} 
The surface side reproduction type optical recording medium 4 , wherein { HEAD ~ the refractive index } of the dielectric layer decreases stepwisely or continuously toward { TAIL ~ the medium surface }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL