An objective lens, an optical head, an optical disc apparatus and an information processing apparatus

@inproceedings{2011AnOL,
  title={An objective lens, an optical head, an optical disc apparatus and an information processing apparatus},
  author={文朝 山崎 and 和博 南田 and 金馬 慶明 and 慶明 金馬 and 潤一 麻田 and 梶野 修 and 修 梶野 and 範晃 寺原 and 俊靖 田中},
  year={2011}
}
An objective lens which can suppress the deterioration of the focusing spot with decreasing the diffraction efficiency, the optical head, to provide an optical disk apparatus and an information processing apparatus. The inner circumferential region (111) and the outer peripheral region (113), an inner peripheral region (111) and out of the laser beam having the wavelength λ1 that is diffracted at the peripheral region (113), the laser beam larger diffraction order of most diffraction efficiency… CONTINUE READING