An optical head with an annular phase-shifting apodizer was experimentally developed, and was found to have a high readout resolution and low readout signal error rate, permitting higher recording densities for the optical disk system. This apodizing head was confirmed experimentally and theoretically to have large tolerance for head defocusing and ample allowance for disk thickness variation, compared to conventional optical heads.
No takes yet. Share an insight, caveat, or question.
Ando et al. (1993) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: