Integrated Optical Unit for Magneto-Optical Pickups
We have developed an integrated optical unit for magneto-optical (MO) pickups which contains three polarized holograms for detecting MO signals and servo error signals. In this study, we modify the integrated optical unit so that it can reproduce two types of discs using two photo detectors. The pha...
Saved in:
Published in | Japanese Journal of Applied Physics Vol. 44; no. 5S; p. 3371 |
---|---|
Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.05.2005
|
Online Access | Get full text |
Cover
Loading…
Summary: | We have developed an integrated optical unit for magneto-optical (MO) pickups which contains three polarized holograms for detecting MO signals and servo error signals. In this study, we modify the integrated optical unit so that it can reproduce two types of discs using two photo detectors. The phase-shift differential push-pull method is used for the radial servo and it is compatible with different track pitches. We also discuss the quality of the reproduced MO signals. |
---|---|
ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.44.3371 |