Optical scanning device having less response to stray...

Details Optical scanning device having less response to stray... Optical scanning device having less response to stray...

2007-06-26

2007-06-26

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112230, C369S120000

Reexamination Certificate

active

10144825

ABSTRACT:
An optical scanning device incorporating a compound objective lens10and a radiaion detector31is described for reading an optical record carrier1in which the optical record carrier1is provided with a transparent layer2. The thickness of the transparent layer2and the effective radius of the detector31are adapted such that the signal-to-noise ratio of the device is significantly improved and/or local heating of an air gap below an air slider is reduced. The optical record carrier is provided with a lubricant to facilitate the use of a slider optical head40.

REFERENCES:
patent: 6208610 (2001-03-01), Kawakami et al.
patent: 6496450 (2002-12-01), Watanabe
patent: 19910109 (1999-09-01), None
patent: 0867873 (1998-09-01), None
patent: 0977192 (2000-02-01), None
patent: 0987699 (2000-03-01), None
patent: 09161311 (1997-06-01), None

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