Integrated optical unit, adjusting method therefor, and...

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

Reexamination Certificate

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C369S044280, C369S112030, C369S112270

Reexamination Certificate

active

07616531

ABSTRACT:
In an integrated optical unit of the present invention, a photo detector (12) and a holding member (17) that sustains a semiconductor laser (11) are provided on a polarizing beam splitter (14). This makes it possible to reduce a deviation from a designed value due to tolerance, and adjust a relative positional relationship between the semiconductor laser (11) and the photo detector (12). Therefore, returned light from an optical disk (4) is accurately adjusted with respect to a division line of a photo-detecting device (13). As a result, stable servo-control is realized, and an information signal with fine quality is obtained.

REFERENCES:
patent: 5490128 (1996-02-01), Ogata
patent: 2004/0026756 (2004-02-01), Yoshida et al.
patent: 2004/0156299 (2004-08-01), Sakai et al.
patent: 04-102239 (1992-04-01), None
patent: 07-129966 (1995-05-01), None
patent: 11-203707 (1999-07-01), None
patent: 2000-011443 (2000-01-01), None
patent: 2001-167464 (2001-06-01), None
patent: 2001-250257 (2001-09-01), None
patent: 2001-273666 (2001-10-01), None
patent: 2002-025073 (2002-01-01), None
patent: 2003-101063 (2003-04-01), None
patent: 3545307 (2004-04-01), None
patent: 2004-200583 (2004-07-01), None
patent: 2004-253094 (2004-09-01), None
Y. Kanazawa et al., “Spherical Aberration Error Signal Detection for Blu-Ray Disc Optical Pickups (I),” issued Mar. 29, 2005, presented Apr. 1, 2005 in proceedings of 52nd Japan Applied Physics Conference.
N. Ogata et al., “Spherical Aberration Error Signal Detection for Blu-Ray Disc Optical Pickups (II),” issued Mar. 29, 2005, presented on Apr. 1, 2005 in proceedings of 52nd Japan Applied Physics Conference.
N. Ogata et al., “Spherical Aberration Error Detection for Blu-Ray Disc Optical Pickups,” presented May 19, 2005 in First Optical-Disc Meeting 2005.
Y. Kanazawa et al., “Integrated Optical Unit for Blu-Ray Disc,” presented on Nov. 23, 2005 in Optics Japan 2005.
M. Horiyama et al., “Optical Pickup Using Integrated Optical Unit for Blu-Ray Disc,” presented on Apr. 24, 2006 in 2006 Optical Data Storage Topical Meeting.
M. Horiyama et al., “Optical Pickup Head Using Integrated Optical Unit for Blu-Ray Disc,” issued Sep. 10, 2006 in 2006 Micro Optics Conference.
Y. Kanazawa et al., “Integrated Optical Unit for Blu-Ray Disc,” IEICE, vol. 106, No. 248, CPM2006-85, pp. 37-39 (Sep. 2006).
M. Horiyama et al., “Optical Pickup Using Integrated Optical Unit for Blu-Ray Disc,” SPIE, vol. 6282, 62820A (2006).

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