Near-Field Induced Polarization Imaging for Optical Data Storage Metrology
It is shown that when the induced polarization is used to acquire near-field induced polarization images, both a high-resolution near-field image and height information of the object are obtained
Sub-surface imaging system for blue ray disk
Sub-surface imaging system using a solid immersion lens (SIL) is introduced. Aberration caused by cover layer of Blue ray disk is minimized with truncated SIL and diffractive optical element (DOE). Sub-surface imaging simulation is achieved by using rigorous coupled wave technique, partial coherence and vector diffraction.
Near-field readout system for a high-density optical ROM disc
We developed a near field readout system for an optical ROM disc with a GaN laser diode and a 1.4-effective-NA objective lens. We read out a 25 Gbyte optical ROM disc using a gap servo and a tracking servo in the near field read system, and experimentally confirmed an effective NA of 1.4.