Robust Focus and Tracking Detection for Holographic Digital Versatile Disc Optical Pickup-Head Modules
This paper introduces a robust focus and tracking detection method for use in holographic pickup heads. The method, which we call split-aperture servo detection, provides the focus error signal and both differential phase detection (DPD) and pushpull tracking signals but requires one less axis of al...
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| Veröffentlicht in: | Japanese Journal of Applied Physics 1999-03, Vol.38 (3S), p.1755 |
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| container_issue | 3S |
| container_start_page | 1755 |
| container_title | Japanese Journal of Applied Physics |
| container_volume | 38 |
| creator | Freeman, Mark O. Shih, Hsi-Fu Wang, Jinn-Kang Yang, Tzu-Ping Hsu, Lehan |
| description | This paper introduces a robust focus and tracking detection method for use
in holographic pickup heads. The method, which we call split-aperture servo
detection, provides the focus error signal and both differential phase detection
(DPD) and pushpull tracking signals but requires one less axis of alignment than
the commonly used quad detector with astigmatic focus detection. A set of
simulations designed according to Taguchi's method is presented comparing the manufacturability of holographic modules using the split-aperture approach and
the astigmatic approach. The split-aperture approach is seen to have strong
advantages. Experimental verification of a prototype digital versatile disc (DVD)
pickup is also presented. |
| doi_str_mv | 10.1143/JJAP.38.1755 |
| format | Article |
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in holographic pickup heads. The method, which we call split-aperture servo
detection, provides the focus error signal and both differential phase detection
(DPD) and pushpull tracking signals but requires one less axis of alignment than
the commonly used quad detector with astigmatic focus detection. A set of
simulations designed according to Taguchi's method is presented comparing the manufacturability of holographic modules using the split-aperture approach and
the astigmatic approach. The split-aperture approach is seen to have strong
advantages. Experimental verification of a prototype digital versatile disc (DVD)
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in holographic pickup heads. The method, which we call split-aperture servo
detection, provides the focus error signal and both differential phase detection
(DPD) and pushpull tracking signals but requires one less axis of alignment than
the commonly used quad detector with astigmatic focus detection. A set of
simulations designed according to Taguchi's method is presented comparing the manufacturability of holographic modules using the split-aperture approach and
the astigmatic approach. The split-aperture approach is seen to have strong
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in holographic pickup heads. The method, which we call split-aperture servo
detection, provides the focus error signal and both differential phase detection
(DPD) and pushpull tracking signals but requires one less axis of alignment than
the commonly used quad detector with astigmatic focus detection. A set of
simulations designed according to Taguchi's method is presented comparing the manufacturability of holographic modules using the split-aperture approach and
the astigmatic approach. The split-aperture approach is seen to have strong
advantages. Experimental verification of a prototype digital versatile disc (DVD)
pickup is also presented.</abstract><doi>10.1143/JJAP.38.1755</doi></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0021-4922 |
| ispartof | Japanese Journal of Applied Physics, 1999-03, Vol.38 (3S), p.1755 |
| issn | 0021-4922 1347-4065 |
| language | eng |
| recordid | cdi_crossref_primary_10_1143_JJAP_38_1755 |
| source | Institute of Physics Journals |
| title | Robust Focus and Tracking Detection for Holographic Digital Versatile Disc Optical Pickup-Head Modules |
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